JPH0873398A - Method for transferring polymerizable liquid - Google Patents
Method for transferring polymerizable liquidInfo
- Publication number
- JPH0873398A JPH0873398A JP23214594A JP23214594A JPH0873398A JP H0873398 A JPH0873398 A JP H0873398A JP 23214594 A JP23214594 A JP 23214594A JP 23214594 A JP23214594 A JP 23214594A JP H0873398 A JPH0873398 A JP H0873398A
- Authority
- JP
- Japan
- Prior art keywords
- polymerizable liquid
- pump
- pressure
- liquid
- oxygen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001301 oxygen Substances 0.000 claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 26
- 239000012298 atmosphere Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 14
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 11
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 abstract description 20
- 239000003112 inhibitor Substances 0.000 description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000012295 chemical reaction liquid Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 description 2
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 150000004982 aromatic amines Chemical class 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 2
- -1 phenol compound Chemical class 0.000 description 2
- 229950000688 phenothiazine Drugs 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アクリル酸、メタクリ
ル酸(以下両者を合わせ(メタ)アクリル酸という)、(メ
タ)アクリル酸エステル等の重合性液体の移送方法に関
するものであり、こられの重合性液体の移送に広く用い
られているキャンドモーターポンプ内での重合を防止
し、重合性液体の製造および使用等における、工業的に
有利な取り扱い方法を提供するものであり、重合性液体
を製造および取り扱う化学業界他で広く利用され得るも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transferring a polymerizable liquid such as acrylic acid, methacrylic acid (hereinafter, both are referred to as (meth) acrylic acid) or (meth) acrylic acid ester. The present invention is intended to prevent polymerization in a canned motor pump that is widely used for transferring a polymerizable liquid, and to provide an industrially advantageous handling method in the production and use of the polymerizable liquid. Can be widely used in the chemical industry, etc.
【０００２】[0002]
【従来の技術】重合性液体は、製造工程、貯蔵もしくは
輸送中に、熱、光、その他の要因により重合し、しばし
ばトラブルが発生することが知られている。それらのト
ラブルの発生防止、すなわち、重合性液体の重合防止方
法としては、フェノチアジン等の芳香族アミン類やハイ
ドロキノン及びその誘導体等のフェノール類化合物等の
重合防止剤の添加や酸素含有ガスとの接触が有効である
ことが知られており、且つ広く採用されている方法であ
る。また一方、重合性液体は漏洩した時に引火爆発の危
険やその特異な臭気による公害があるため、原子力関係
の放射性液を取り扱うために開発された完全に無漏洩な
キャンドモーターポンプ（化学工業社発行、「＜工場操
作シリーズ＞流体輸送」、１８７頁、１８．キャンドモ
ーターポンプ）が重合性液体の取り扱いにも使用されて
おり、危険防止や公害防止に役立っている。2. Description of the Related Art It is known that a polymerizable liquid polymerizes due to heat, light or other factors during the manufacturing process, storage or transportation, and often causes troubles. To prevent the occurrence of these troubles, that is, as a method for preventing the polymerization of the polymerizable liquid, addition of a polymerization inhibitor such as an aromatic amine such as phenothiazine or a phenol compound such as hydroquinone and its derivative, or contact with an oxygen-containing gas Is known to be effective and is widely adopted. On the other hand, when a polymerizable liquid leaks, there is a danger of a flammable explosion and pollution due to its peculiar odor, so a completely leak-free canned motor pump developed for handling nuclear-related radioactive liquids (issued by Kagaku Kogyo , “<Factory operation series> Fluid transportation”, page 187, 18. Canned motor pump) is also used for handling polymerizable liquids, which helps prevent danger and pollution.
【０００３】[0003]
【発明が解決しようとする課題】重合性液体の重合防止
方法としての、フェノチアジン等の芳香族アミン類やハ
イドロキノン及びその誘導体等のフェノール類化合物等
の重合防止剤の添加や酸素含有ガスとの接触は有効であ
り、重合性液体の製造工程及び取り扱いの際に一般的に
使用され十分な効果をあげている。しかしながら、サー
キュレーションチューブを経て吐出側の液の一部をロー
ター回転室に導き、モーターの冷却と液中ベアリングの
潤滑を行う標準的なキャンドモーターポンプを用いて重
合性液体を移送しようとする際は、モーターやベアリン
グ等における発熱により、重合性液体が重合して液の流
通を阻害し、冷却や潤滑効果が失われ、ポンプの焼き付
き等の重大なトラブルがしばしば発生するという問題点
を有している。特に、そのトラブルは、重合性液体を減
圧下に取り扱う際によりしばしば発生し、蒸留等の操作
を困難にしている。それらの問題点を解決する方法とし
て、重合防止剤の添加量の増加が考えられるが、単に重
合防止剤の添加量を増加しても、それに応じた効果が認
められないばかりではなく、多量の重合防止剤の添加さ
れた重合性液体は、製品価値が低下したものとなるた
め、採用が困難な方法である。本発明者等は、以上の様
なキャンドモーターポンプを用いて減圧状態の重合性液
体を移送する際に発生する問題点を解消すべく種々検討
したのである。As a method for preventing the polymerization of a polymerizable liquid, addition of a polymerization inhibitor such as aromatic amines such as phenothiazine or phenol compounds such as hydroquinone and its derivatives, and contact with an oxygen-containing gas. Is effective, and is generally used in the production process and handling of the polymerizable liquid and exhibits a sufficient effect. However, when trying to transfer a polymerizable liquid using a standard canned motor pump that guides a part of the liquid on the discharge side to the rotor rotation chamber through the circulation tube and cools the motor and lubricates the submerged bearing. Has the problem that the polymerizable liquid polymerizes due to heat generation in the motor, bearings, etc., obstructing the flow of the liquid, the cooling and lubrication effects are lost, and serious problems such as seizure of the pump often occur. ing. In particular, such troubles often occur when handling the polymerizable liquid under reduced pressure, which makes operations such as distillation difficult. As a method of solving these problems, it is considered that the amount of the polymerization inhibitor added is increased, but even if the amount of the polymerization inhibitor is simply increased, not only the effect corresponding thereto is not observed, but also a large amount of A polymerizable liquid to which a polymerization inhibitor is added has a reduced product value, and is therefore difficult to employ. The present inventors have made various studies in order to eliminate the problems that occur when transferring a polymerizable liquid under reduced pressure using the above canned motor pump.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、キャンド
モーターポンプを用いて減圧下の重合性液体を移送する
際に発生する問題点を解消するために鋭意検討を重ねた
結果、本発明を完成するに至ったのである。すなわち、
本発明は、減圧下の重合性液体の移送をキャンドモータ
ーポンプで行うに際し、当該重合性液体の一部を酸素含
有気体の雰囲気下で常圧に戻してモーターの冷却に用い
ることを特徴とする重合性液体の移送方法に関するもの
である。DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted extensive studies to solve the problems that occur when a polymerizable liquid under reduced pressure is transferred using a canned motor pump, and as a result, the present invention Has been completed. That is,
The present invention is characterized in that when a canned motor pump is used to transfer a polymerizable liquid under reduced pressure, a part of the polymerizable liquid is returned to normal pressure in an atmosphere containing an oxygen-containing gas for cooling the motor. The present invention relates to a method for transferring a polymerizable liquid.
【０００５】以下に本発明をさらに詳しく説明する。本
発明は、上記した様に、キャンドモーターポンプを用い
て減圧下の重合性液体の移送を行う際に、使用されるポ
ンプのモーターの冷却を、移送される減圧下の重合性液
体の一部を酸素含有気体の雰囲気下で常圧に戻したもの
で行い、減圧下における重合性液体の移送時の問題点を
解消するというものである。本発明において、移送可能
な重合性液体は多岐にわたるが、その具体例を挙げれ
ば、(メタ)アクリル酸、(メタ)アクリル酸メチル、(メ
タ)アクリル酸エチル、(メタ)アクリル酸プロピル、(メ
タ)アクリル酸ブチル、(メタ)アクリル酸シクロヘキシ
ル、(メタ)アクリル酸2-エチルヘキシル等の(メタ)アク
リル酸ならびにそれらのアルキルエステルもしくはシク
ロアルキルエステル、エチレングリコールジ(メタ)アク
リレート、グリセリントリ(メタ)アクリレート等の多官
能の(メタ)アクリレート等のビニル系不飽和化合物があ
る。キャンドモーターポンプ（ケミポンプともいう）
は、上記した様に吐出側の液の一部をサーキュレーショ
ンチューブを経てローター回転室に導き、モーターの冷
却と液中ベアリングの潤滑を行うというものであり、無
漏洩という特性から広く利用されているものであるが、
減圧下の重合性液体の移送に利用すると、冷却や潤滑に
用いられた重合性液体が、モーターやベアリング等にお
ける発熱により重合して液の流通を阻害し、しばしばト
ラブルを発生させるものである。そのため、本発明にお
いては、例えば、本体と一体構造になっているサーキュ
レーションチューブの一部を改造して、ポンプの吐出側
より循環している当該重合性液体を、これらの重合性液
体は適量の重合防止剤を含有しているものであるが、サ
ーキュレーションチューブより取り出し、一旦酸素含有
気体の雰囲気下で常圧に戻したうえで、再度サーキュレ
ーションチューブに戻し、モーターの冷却に用いるとい
う様に、減圧下の重合性液体を酸素含有気体の雰囲気下
で常圧に戻したものをポンプの冷却に用いるのである。
尚、サーキュレーションチューブに常圧の重合性液体を
戻す際には、必要に応じてポンプの吐出圧力まで加圧す
ることが行われる。又、常圧の重合性液体をサーキュレ
ーションチューブに戻す際に、当該重合性液体を冷却し
ておくことは、モーターやベアリング等のポンプ内部で
発生する熱の除去にさらに有効である。キャンドモータ
ーポンプは、広く一般的に市販されており、それら市販
品が問題なく本発明に適用される。本発明においては、
サーキュレーションチューブ内を冷却のために循環する
重合性液体の代わりに、減圧下の重合性液体を抜き出し
て、酸素雰囲気下で常圧に戻した重合性液体を用いるの
であり、これによりキャンドモーターポンプ内での重合
性液体の予期せぬ重合が防止されるのである。重合性液
体の抜き出し、戻し入れに際し、前記した様に、サーキ
ュレーションチューブを改造して利用することも、サー
キュレーションチューブは撤去し、減圧下の重合性液体
を系内から適宜抜き出して、酸素雰囲気下で常圧に戻
し、直接ポンプに冷却用として供給することも可能であ
る。減圧下の重合性液体を酸素雰囲気下で常圧に戻す方
法としては、単に、大気圧下で酸素を含有する気体の雰
囲気の貯槽に重合性液体を一旦貯蔵するという様な簡単
な方法でよいが、より本発明の効果を効率的に発揮させ
るためには、重合性液体中に酸素を含有する気体を導入
してバブリング（曝気）するのが好ましい方法であり、
この様な処理により重合性液体中に酸素が容易に取り込
まれ、当該重合性液体の重合がより効果的に防止される
ものと判断される。酸素を含有する気体としては、特に
限定されるものではないが、引火点の低い重合性液体を
取り扱う場合は、空気などの様な酸素濃度が高い気体
は、爆発性混合ガス（爆鳴気）を形成し危険性が増大す
るので、取り扱う液によっては、酸素濃度を２１容量％
（空気）以下に抑えることが好ましい。また、酸素濃度
が３容量％より低い場合は、本発明の効果が得られ難い
ので、酸素濃度は３容量％以上にすることが好ましい。The present invention will be described in more detail below. INDUSTRIAL APPLICABILITY As described above, the present invention cools the motor of a pump used when transferring a polymerizable liquid under reduced pressure using a canned motor pump, and transfers a part of the polymerizable liquid under reduced pressure to be transferred. Is carried out by returning the pressure to normal pressure in the atmosphere of oxygen-containing gas, and the problem at the time of transferring the polymerizable liquid under reduced pressure is solved. In the present invention, there are a wide variety of transferable polymerizable liquids, and specific examples thereof include (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, (meth) propyl acrylate, and (Meth) acrylic acid such as butyl acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate and their alkyl or cycloalkyl esters, ethylene glycol di (meth) acrylate, glycerin tri (meth) ) There are vinyl unsaturated compounds such as polyfunctional (meth) acrylates such as acrylate. Canned motor pump (also called chemipump)
As described above, a part of the liquid on the discharge side is guided to the rotor rotation chamber via the circulation tube to cool the motor and lubricate the submerged bearing. There are
When it is used for transferring a polymerizable liquid under reduced pressure, the polymerizable liquid used for cooling and lubrication is polymerized by heat generation in a motor, a bearing and the like to hinder the flow of the liquid, often causing trouble. Therefore, in the present invention, for example, by modifying a part of the circulation tube having an integral structure with the main body, the polymerizable liquid circulated from the discharge side of the pump is supplied with an appropriate amount of the polymerizable liquid. Although it contains a polymerization inhibitor, it is taken out from the circulation tube, once returned to normal pressure under an atmosphere of oxygen-containing gas, then returned to the circulation tube and used for cooling the motor. In addition, the polymerizable liquid under reduced pressure is returned to normal pressure in the atmosphere of oxygen-containing gas and used for cooling the pump.
In addition, when returning the polymerizable liquid under atmospheric pressure to the circulation tube, the discharge pressure of the pump is increased as necessary. Further, when returning the polymerizable liquid under normal pressure to the circulation tube, cooling the polymerizable liquid is more effective for removing heat generated inside the pump such as the motor and the bearing. Canned motor pumps are widely and generally commercially available, and those commercially available products can be applied to the present invention without any problem. In the present invention,
Instead of the polymerizable liquid that circulates in the circulation tube for cooling, a polymerizable liquid that has been extracted under reduced pressure and returned to normal pressure in an oxygen atmosphere is used. Unexpected polymerization of the polymerizable liquid inside is prevented. When extracting and returning the polymerizable liquid, the circulation tube may be modified and used as described above, or the circulation tube may be removed, and the polymerizable liquid under reduced pressure may be appropriately extracted from the system to obtain an oxygen atmosphere. It is also possible to return to normal pressure below and feed directly to the pump for cooling. As a method for returning the polymerizable liquid under reduced pressure to normal pressure under an oxygen atmosphere, a simple method such as temporarily storing the polymerizable liquid in a storage tank of an oxygen-containing gas atmosphere under atmospheric pressure may be used. However, in order to more efficiently exert the effect of the present invention, it is a preferable method to introduce a gas containing oxygen into the polymerizable liquid and perform bubbling (aeration),
It is considered that such a treatment allows oxygen to be easily taken into the polymerizable liquid, thereby effectively preventing the polymerization of the polymerizable liquid. The gas containing oxygen is not particularly limited, but when handling a polymerizable liquid having a low flash point, a gas with a high oxygen concentration such as air is an explosive mixed gas (detonation). The oxygen concentration is 21% by volume depending on the liquid to be handled.
(Air) It is preferable to keep it below. Further, when the oxygen concentration is lower than 3% by volume, the effect of the present invention is difficult to obtain, so the oxygen concentration is preferably 3% by volume or more.
【０００６】[0006]
【作用】減圧下の重合性液体のキャンドモーターポンプ
内部における望ましからぬ重合が、キャンドモーターポ
ンプの冷却ないし潤滑に用いられる当該重合性液体を、
酸素雰囲気下で常圧に戻したものとすることにより防止
でき、重合性液体をキャンドモーターポンプにより輸送
する際に製品品質を低下させずに、かつポンプの焼き付
きによる重大トラブルを抑制することができるのであ
る。この作用は、重合防止剤として機能し、且つ常圧の
重合性液体中に存在していた酸素が、重合性液体が減圧
にされることによって飛散し、常圧状態では重合を防止
していたのが、減圧状態では、その機能を失っていたと
いう状況を解消する、すなわち、酸素雰囲気下で減圧下
の重合性液体を常圧に戻すことによって、重合性液体中
に酸素が取り込まれ、当該酸素によって重合が阻止され
るという作用が奏されるものと推定される。The undesired polymerization of the polymerizable liquid under reduced pressure inside the canned motor pump causes the polymerizable liquid used for cooling or lubrication of the canned motor pump,
This can be prevented by returning to normal pressure in an oxygen atmosphere, and when transporting the polymerizable liquid by a canned motor pump, it is possible to prevent serious problems due to seizure of the pump without lowering product quality. Of. This action functions as a polymerization inhibitor, and oxygen existing in the polymerizable liquid under normal pressure is scattered by reducing the pressure of the polymerizable liquid, and prevents polymerization under normal pressure. However, in the reduced pressure state, eliminating the situation that had lost its function, that is, by returning the polymerizable liquid under reduced pressure to normal pressure in an oxygen atmosphere, oxygen is taken into the polymerizable liquid, It is presumed that the effect of inhibiting polymerization by oxygen is exerted.
【０００７】[0007]
【実施例】以下に、本発明について実施例および比較例
を挙げて詳細に説明する。 実施例１ アクリル酸９５重量％（ハイドロキノンモノメチルエー
テル２０００ｐｐｍ含有）、含む粗アクリル酸を温度９
０±３℃、圧力８０±３Ｔorrの精留塔塔底液から抜き
出すためのポンプとして、標準的なキャンドモーターポ
ンプ（外部からバックフラッシング液を使用しないキャ
ンドモーターポンプ）のサーキュレーションチューブを
改造してポンプの吐出側より循環している粗アクリル酸
をサーキュレーションチューブより取り出し、一旦空気
雰囲気下で常圧に戻るようにした上で、その液をポンプ
の吐出圧まで加圧してサーキュレーションチューブに戻
してバックフラッシング液に使用して運転したところ、
トラブルもなく、１年間問題なく運転ができた。EXAMPLES The present invention will be described in detail below with reference to examples and comparative examples. Example 1 A crude acrylic acid containing 95% by weight of acrylic acid (containing 2000 ppm of hydroquinone monomethyl ether) at a temperature of 9
As a pump for extracting from the bottom liquid of the rectification column at 0 ± 3 ° C and a pressure of 80 ± 3 Torr, modify the circulation tube of a standard canned motor pump (canned motor pump that does not use backflushing liquid from the outside). The crude acrylic acid circulated from the discharge side of the pump is taken out from the circulation tube, and once returned to normal pressure in an air atmosphere, the liquid is pressurized to the discharge pressure of the pump and returned to the circulation tube. I used it as a back flushing liquid and operated it,
There was no trouble and I was able to drive without problems for a year.
【０００８】実施例２ アクリル酸メチル９５重量％（ハイドロキノンモノメチ
ルエーテル１０００ｐｐｍ含有）を含む粗アクリル酸メ
チルの反応液（温度５５±２℃、圧力２８０±５Ｔor
r）抜き出し用のポンプとして、実施例１と同様な改造
を施した標準的なキャンドモーターポンプを使用して、
当該反応液を５容量％の酸素を含有する窒素ガス雰囲気
下で常圧に戻し、１０℃まで冷却してバックフラッシン
グ液として運転したところ、トラブルもなく、１年間問
題なく運転ができた。Example 2 Crude methyl acrylate reaction liquid containing 95% by weight of methyl acrylate (containing 1000 ppm of hydroquinone monomethyl ether) (temperature 55 ± 2 ° C., pressure 280 ± 5 Tor)
r) As a pump for extraction, using a standard canned motor pump that has been modified as in Example 1,
When the reaction liquid was returned to normal pressure in a nitrogen gas atmosphere containing 5% by volume of oxygen and cooled to 10 ° C. and operated as a backflushing liquid, there was no trouble and operation was possible for one year without problems.
【０００９】実施例３ アクリル酸2-エチルヘキシル９５重量％を含む粗アクリ
ル酸2-エチルヘキシルの反応液（温度１４０±１０℃、
圧力５０±３Ｔorr)抜き出し用のポンプとして、実施例
１と同様な改造を施した標準的なキャンドモーターポン
プを使用して、当該反応液を空気雰囲気下で常圧に戻
し、１０℃まで冷却してバックフラッシング液として運
転したところ、トラブルもなく、１年間問題なく運転が
できた。Example 3 Reaction solution of crude 2-ethylhexyl acrylate containing 95% by weight of 2-ethylhexyl acrylate (temperature 140 ± 10 ° C.,
A standard canned motor pump modified as in Example 1 was used as a pump for extracting pressure (50 ± 3 Torr), and the reaction liquid was returned to normal pressure in an air atmosphere and cooled to 10 ° C. As a backflushing liquid, it operated without any trouble and was able to operate without problems for one year.
【００１０】比較例１ 実施例１と同様の箇所に、実施例１で用いた標準的なキ
ャンドモーターポンプ（サーキュレーションチューブの
改造されていない）を使用して運転したところ、数時間
後にポンプ内の重合トラブルにより、運転を停止した。Comparative Example 1 When the standard canned motor pump used in Example 1 (without modification of the circulation tube) was operated at the same location as in Example 1, the pump was operated after several hours. The operation was stopped due to the polymerization trouble of.
【００１１】比較例２ 実施例２と同様の箇所に、実施例１で用いた標準的なキ
ャンドモーターポンプ（サーキュレーションチューブの
改造されていない）を使用して運転したところ、数時間
後にポンプ内の重合トラブルにより、運転を停止した。COMPARATIVE EXAMPLE 2 When the standard canned motor pump used in Example 1 (without modification of the circulation tube) was operated at the same location as in Example 2, the inside of the pump was found after several hours. The operation was stopped due to the polymerization trouble of.
【００１２】実施例３と同様の箇所に、実施例１で用い
た標準的なキャンドモーターポンプ（サーキュレーショ
ンチューブの改造されていない）を使用して運転したと
ころ、数時間後にポンプ内の重合トラブルにより、運転
を停止した。When the standard canned motor pump used in Example 1 (without modification of the circulation tube) was operated at the same location as in Example 3, polymerization trouble in the pump occurred after several hours. Due to this, the operation was stopped.
【００１３】[0013]
【発明の効果】減圧下の重合性液体のキャンドモーター
ポンプ内部における望ましからぬ重合が、キャンドモー
ターポンプの冷却ないし潤滑に用いられる当該重合性液
体を、酸素雰囲気下で常圧に戻したものとすることによ
り防止できる。すなわち、減圧下の重合性液体をキャン
ドモーターポンプにより輸送する際に製品品質を低下さ
せずに、ポンプの焼き付きによる重大トラブルを抑制す
ることができ、重合性液体の製造および使用等において
工業的に有利な取り扱い方法を提供できるものである。The undesired polymerization of the polymerizable liquid under reduced pressure inside the canned motor pump causes the polymerizable liquid used for cooling or lubrication of the canned motor pump to return to normal pressure in an oxygen atmosphere. Can be prevented. That is, when the polymerizable liquid under reduced pressure is transported by a canned motor pump, it is possible to suppress serious troubles due to seizure of the pump without degrading the product quality, and industrially in the production and use of the polymerizable liquid. It is possible to provide an advantageous handling method.
Claims (2)
ーターポンプで行うに際し、当該重合性液体の一部を酸
素含有気体の雰囲気下で常圧に戻してモーターの冷却に
用いることを特徴とする重合性液体の移送方法。1. When the transfer of the polymerizable liquid under reduced pressure is performed by a canned motor pump, a part of the polymerizable liquid is returned to normal pressure in an atmosphere containing an oxygen-containing gas and used for cooling the motor. A method for transferring a polymerizable liquid.
またはそれらのエステルであることを特徴とする請求項
１の重合性液体の移送方法。2. The method for transferring a polymerizable liquid according to claim 1, wherein the polymerizable liquid is acrylic acid, methacrylic acid or an ester thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23214594A JP2888149B2 (en) | 1994-09-01 | 1994-09-01 | Transfer method of polymerizable liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23214594A JP2888149B2 (en) | 1994-09-01 | 1994-09-01 | Transfer method of polymerizable liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0873398A true JPH0873398A (en) | 1996-03-19 |
| JP2888149B2 JP2888149B2 (en) | 1999-05-10 |
Family
ID=16934706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23214594A Expired - Lifetime JP2888149B2 (en) | 1994-09-01 | 1994-09-01 | Transfer method of polymerizable liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2888149B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1092874A2 (en) | 1999-10-12 | 2001-04-18 | Nippon Shokubai Co., Ltd. | Method for transferring easily-polymerizable substance |
| JP2001328960A (en) * | 2000-03-13 | 2001-11-27 | Nippon Shokubai Co Ltd | Method for producing hydroxyalkyl (meth)acrylate |
| WO2003082790A1 (en) * | 2002-03-28 | 2003-10-09 | Mitsubishi Rayon Co., Ltd. | Transporting method and transporting facility for easily polimerizable material |
| JP2017210489A (en) * | 2012-04-27 | 2017-11-30 | 旭硝子株式会社 | Tetrafluoropropene storage method and tetrafluoropropene storage container |
-
1994
- 1994-09-01 JP JP23214594A patent/JP2888149B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1092874A2 (en) | 1999-10-12 | 2001-04-18 | Nippon Shokubai Co., Ltd. | Method for transferring easily-polymerizable substance |
| JP2001114705A (en) * | 1999-10-12 | 2001-04-24 | Nippon Shokubai Co Ltd | Method for easily transporting polymerizable compound |
| EP1092874A3 (en) * | 1999-10-12 | 2001-05-09 | Nippon Shokubai Co., Ltd. | Method for transferring easily-polymerizable substance |
| US6454541B1 (en) | 1999-10-12 | 2002-09-24 | Nippon Shokubai Co., Ltd. | Method for transferring easily-polymerizable substance |
| JP2001328960A (en) * | 2000-03-13 | 2001-11-27 | Nippon Shokubai Co Ltd | Method for producing hydroxyalkyl (meth)acrylate |
| WO2003082790A1 (en) * | 2002-03-28 | 2003-10-09 | Mitsubishi Rayon Co., Ltd. | Transporting method and transporting facility for easily polimerizable material |
| US7641450B2 (en) | 2002-03-28 | 2010-01-05 | Mitsubishi Rayon Co., Ltd. | Transporting method and transporting facility for easily polimerizable material |
| JP2017210489A (en) * | 2012-04-27 | 2017-11-30 | 旭硝子株式会社 | Tetrafluoropropene storage method and tetrafluoropropene storage container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2888149B2 (en) | 1999-05-10 |
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