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Scavenger for clearing away PVC (polyvinyl chloride) polymer in top condenser of polymerization kettle

A scavenger, condenser technology, applied in detergent compositions, soap detergent compositions, non-surface-active detergent compositions, etc. Ease of use, great social and economic benefits

Active Publication Date: 2012-07-25
HENAN CHEM IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, for the problem of clogging and wall sticking of PVC polymer in the top condenser of the polymerization kettle in the production of PVC in chlor-alkali chemical enterprises, there is no literature report on the relevant chemical cleaning solution.

Method used

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  • Scavenger for clearing away PVC (polyvinyl chloride) polymer in top condenser of polymerization kettle
  • Scavenger for clearing away PVC (polyvinyl chloride) polymer in top condenser of polymerization kettle
  • Scavenger for clearing away PVC (polyvinyl chloride) polymer in top condenser of polymerization kettle

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment one: a PVC polymer scavenger in the condenser on the top of the polymerization kettle, the scavenger is composed of the following components by weight percentage: chelating agent N, N-diethylformamide 60%, penetrant T 5% , Surfactant OP-10 5%, cosolvent cyclohexanone 30%.

[0027] The preparation method of the product PVC polymer scavenger of the present invention: take by weighing various raw materials according to the raw material composition of above-mentioned PVC polymer scavenger, add raw materials such as chelating agent, penetrant, surfactant, co-solvent in the reaction vessel and stir, After fully dissolving, stir evenly, and finally fill.

[0028] The application test of the above-mentioned product: take a certain amount of the product PVC polymer scavenger of the present invention and put it into a container, put a certain amount of white PVC polymer block into the product scavenger of the present invention, and heat it in a water bath to control it...

Embodiment 2

[0029] Embodiment two: basically the same as embodiment one, the difference is: the PVC polymer scavenger in the condenser on the top of the polymerization tank is made up of the following components by weight percentage: chelating agent N, N-diethylformazan Amide 60.1%, penetrant T 5%, surfactant OP-10 5%, cosolvent cyclohexanone 29.9%.

[0030] The application test of the above-mentioned product: take a certain amount of the product PVC polymer scavenger of the present invention and put it into a container, put a certain amount of white PVC polymer block into the product scavenger of the present invention, and heat it in a water bath to control its temperature at 60 to 85 ℃, after about 18 hours, the white blocky PVC polymer has completely dissolved and turned into a transparent viscous liquid. The PVC polymer is completely dissolved, and the removal rate of PVC polymer reaches 98%.

Embodiment 3

[0031] Embodiment three: basically identical with embodiment one, difference is: PVC polymer scavenger is made up of the following components by weight percentage in the condenser on the top of polymerization kettle: chelating agent 65% (from 50%N, N-two ethyl formamide and 15% phthalic acid), penetrant T 5%, surfactant OP-10 5%, cosolvent 25% (composed of 15% cyclohexanone and 10% dichloroethylene).

[0032] The application test of the above-mentioned product: take a certain amount of the product PVC polymer scavenger of the present invention and put it into a container, put a certain amount of white PVC polymer block into the product scavenger of the present invention, and heat it in a water bath to control its temperature at 60 to 85 ℃, after about 24 hours, the white blocky PVC polymer has completely dissolved and turned into a transparent viscous liquid. The PVC polymer is completely dissolved, and the removal rate of PVC polymer reaches 96%.

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Abstract

The invention discloses a scavenger for clearing away PVC (polyvinyl chloride) polymer in a top condenser of a polymerization kettle, which comprises the following components by weight percentage: 60-80% of a chelator, 1-5% of a penetrant, 0.5-3% of a surfactant, 15-25% of a cosolvent and the balance of acetone or glycol. The scavenger is prepared by the steps of adding raw materials such as the chelator, the penetrant, the surfactant, the cosolvent and the like in a reactor, stirring, adding acetone or glycol after the raw materials are fully dissolved, and stirring uniformly; and finally filling. The scavenger for clearing away PVC polymer provided by the invention has strong chelation dissolving capacity, high dissolving rate, almost no corrosion to all metals and high descaling capacity, is convenient to use and fast in action, and does not affect the continuous normal production of enterprises. The scavenger has remarkable social and economic benefits.

Description

technical field [0001] The invention relates to a scavenger, in particular to a PVC polymer scavenger in a condenser at the top of a polymerization kettle. Background technique [0002] At present, there are various scavenger products used in different industries and fields. Various types of environmentally friendly scavengers are widely used in various industries (pipelines, boilers, central air conditioners, heat exchangers, condensers, evaporators, refrigerators, air compressors, reaction kettles, smelting furnaces, heating systems and ceramics, Non-metallic equipment such as plastics), civilian use, and the application field involves all aspects of production and life. [0003] For the removal of PVC polymers, physical cleaning methods and chemical cleaning methods are mainly used in China at present. Physical cleaning: including artificial brushing, high-pressure water jet cleaning, superheated steam blowing and solvent dissolution, etc.; chemical cleaning: under cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D10/02C11D7/32
Inventor 马家轩谢云漫王柏楠张钺邵国斌汪心想李玉峰吴建波杨献红程宏宇张谦华韩景华刘秀伟李燕国刘玉林赵怡莉张慧敏武臻冯玉君张晨夏成浩任泉清师传兴王宏力马宏义王静
Owner HENAN CHEM IND RES INST
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