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A solution for cleaning nylon 6 polymerization reaction device and the application method of the solution

A polymerization reaction and nylon technology, which is applied in the field of cleaning nylon 6 polymerization reaction devices, can solve the problems of polymerization tube wear marks, long time consumption of trays, and influence of polymerization tube walls, etc., so as to achieve shortened service life, no dead angle cleaning, and long time-consuming solution Effect

Active Publication Date: 2020-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of cleaning is easy to cause wear marks on the polymerization tube, which will affect the wall of the polymerization tube. At the same time, physical cleaning cannot clean the material under the tray of the polymerization tube.
It takes a long time to remove all the trays of the polymerization tube and the cost is high

Method used

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  • A solution for cleaning nylon 6 polymerization reaction device and the application method of the solution
  • A solution for cleaning nylon 6 polymerization reaction device and the application method of the solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The nylon 6 polymerization reaction device used in this example is: a nylon 6 polymerization reaction device of the Caprolactam Division of a petrochemical enterprise in Hunan.

[0046] see figure 1 , the storage of solution 1, use 3kg steam to heat and keep warm, the temperature of solution 1 is controlled at 110 ℃. The storage tank of solution 1 needs to be protected by nitrogen gas, and the pressure of the storage tank system is maintained at 1kpa. The solution 1 is composed of water and an organic solvent, the water accounts for 5% by mass, and the organic solvent accounts for 95% by mass. The organic solvent glycerol and trimethylolpropane used are composed; the total mass of glycerol and trimethylolpropane in the solution 1 is in mass ratio to water, water: (glycerin+trimethylolpropane)=1:19; and The mass ratio of glycerol to trimethylolpropane is 18:1.

[0047] Delivery of Solution 1

[0048] The solution 1 can be transported by a centrifugal pump feeding the...

Embodiment 2

[0064] The nylon 6 polymerization reaction device used in this example is: a nylon 6 polymerization reaction device of the Caprolactam Division of a petrochemical enterprise in Hunan.

[0065] see figure 1 , the storage of solution 1, use 3kg steam to heat and keep warm, the temperature of solution 1 is controlled at 110 ℃. The storage tank of solution 1 needs to be protected by nitrogen gas, and the pressure of the storage tank system is maintained at 1kpa. The solution 1 is composed of water and an organic solvent, wherein the mass proportion of water is 1%, and the mass proportion of organic solvent is 99%. The organic solvent used is composed of water and glycerol in a mass ratio of 1:99;

[0066] Delivery of Solution 1

[0067] The solution 1 can be transported by a centrifugal pump feeding the original nylon 6 polymerization device, or by a gear pump. The jacket of the transport pipeline needs to be heated with steam to prevent the solution from solidifying at low tem...

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PUM

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Abstract

The invention relates to a solution for cleaning a nylon 6 polymerization device, and concretely relates to a solution 1 for cleaning the nylon 6 polymerization device and a solution 2 for cleaning the solution 1, and a method for cleaning the nylon 6 polymerization device by using the solution 1 and the solution 2. The solution 1 is composed of water and organic solvents, wherein the mass of the water is 1%-5% of the total mass, and the mass of the organic solvents is 95%-99% of the total mass; and the structure formulas of the organic solvents in the solution 1 contain 1-5 hydroxyl groups and / or carbonyl groups, and the quantity of carbon atoms is 3-9; and the solution 2 is composed of water and a detergent, wherein the mass of the water is 99.90%-99.95% of the total mass, and the mass of the detergent is 0.05%-0.10% of the total mass. The two solutions and the cleaning method provided by the invention can effectively clean gel materials in the nylon 6 polymerization device, effectively avoid impurities contaminating a polymerization kettle during a cleaning process, improve the cleaning effect, and decrease costs.

Description

technical field [0001] The invention relates to a solution for cleaning a polymerization reaction device, specifically, a solution 1 for cleaning a nylon 6 polymerization reaction device, a solution 2 for cleaning the solution 1, and a method for cleaning the nylon 6 polymerization reaction device using the solution. Background technique [0002] Nylon 6 is a material having excellent heat resistance, chemical resistance, mechanical properties, and moldability, and is widely used in synthetic fibers, molding materials for automobile parts, etc., packaging materials such as films, and the like. [0003] Most of the existing domestic nylon 6 slice production devices produce nylon 6 slices through the melt polycondensation process. Under this process, the polymerization tube adopts two-stage polymerization or one-stage polymerization. The polymerization tube is prone to produce gel substances due to abnormal processes under long-term operation. The substance is easy to hang on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D3/20C11D3/44C11D3/60B08B3/08B08B3/10
CPCB08B3/08B08B3/10C11D3/2065C11D3/43
Inventor 刘炎肖朝晖颜登峰肖敏钟勇良葛强陶馥洁叶军芳
Owner CHINA PETROLEUM & CHEM CORP