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A kind of EVA resin fouling chemical decomposition remover and using method thereof

A technology for chemical decomposition and scavenger, applied in chemical instruments and methods, detergent compositions, detergent compounding agents, etc. The effect of reducing errors on the operating side, avoiding more residues, and quickly removing dirt

Active Publication Date: 2019-08-02
上海兰林清洗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For a long time, the cleaning and removal of organic polymer dirt such as EVA resin (ethylene-vinyl acetate copolymer) has been a problem faced by such manufacturers in the maintenance process, especially for resin synthesis production or similar product companies, because this The chemical properties of these substances are extremely stable. Due to the long-chain combination and the strong bond energy, the adhesive viscosity is very large. This is the advantage of resin products in normal use, but when encountered in production and life This advantage becomes the biggest obstacle when it needs to be decomposed and removed. For example, such polymers in the production device are glued to the equipment body. If they are not removed, they will undoubtedly pose a threat to the normal operation of the production process.
[0003] Through the search of relevant information and the understanding of the actual situation, at present, EVA resin manufacturers have problems such as dirt clogging, reduced equipment circulation, and reduced heat exchange efficiency to varying degrees, and there is no good solution.
The pipes, heat exchangers and other devices involved in the EVA resin production process are limited by parameters such as good airtightness, high pressure level, and long pipeline length. These devices cannot be cleaned by mechanical and physical cleaning such as high-pressure water jet cleaning. The purpose is extremely difficult to implement, and it is basically impossible to achieve

Method used

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  • A kind of EVA resin fouling chemical decomposition remover and using method thereof
  • A kind of EVA resin fouling chemical decomposition remover and using method thereof
  • A kind of EVA resin fouling chemical decomposition remover and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (I) Decomposition scavenger liquid A

[0037] Potassium permanganate 5%, trichloroisocyanuric acid 5%, sodium hydroxide 10%, isomeric alcohol ether 0.5%, fatty alcohol polyoxyethylene ether 0.8%, water 78.7%.

[0038] Among them, the solution was purple.

[0039] (II) Decomposition scavenger liquid B

[0040] Trichlorethylene 40%, methanol 35%, polyglycerol oleate 4%, water 21%.

[0041] Among them, the solution is milky white.

[0042] In the cleaning process, the decomposing scavenger A liquid oxidizes the dirt, which promotes its aging, decomposition, and reduces the bond energy of chemical bonds. The decomposing scavenger B liquid dissolves the chemical substances decomposed in the dirt, and this dissolution is greatly reduced. It improves the viscosity and toughness of the dirt, making it fluid and easy to separate from the equipment to be cleaned.

[0043] Considering that the decomposing scavenger A and liquid B are used as a set in tandem in the actual appli...

Embodiment 2

[0066] (I) Decomposition scavenger liquid A

[0067] Potassium permanganate 6%, trichloroisocyanuric acid 2%, sodium hydroxide 8%, isomeric alcohol ether 0.5%, fatty alcohol polyoxyethylene ether 0.6%, water 82.9%.

[0068] (II) Decomposition scavenger liquid B

[0069] Trichlorethylene 30%, Methanol 25%, Span 80 5%, Water 40%.

[0070] (III) How to use

[0071] The equipment to be cleaned is a small workpiece in the production process of EVA resin (the molecular weight of EVA resin dirt is 38000-42000), and the dirt is translucent and large particles. The specific implementation method is as follows:

[0072] (1) Completely immerse the workpiece in the decomposition and scavenger A liquid in the cleaning container, so that it can fully contact with the decomposition and scavenger A liquid.

[0073] Among them, considering the small size of the workpiece, a heatable glass for the test is used as the cleaning container, and the static immersion is adopted.

[0074] (2) Heat...

Embodiment 3

[0087] (I) Decomposition scavenger liquid A

[0088] Potassium permanganate 8%, trichloroisocyanuric acid 3%, sodium hydroxide 6%, isomeric alcohol ether 0.8%, fatty alcohol polyoxyethylene ether 0.5%, water 81.7%.

[0089] (II) Decomposition scavenger liquid B

[0090] Trichlorethylene 35%, Methanol 30%, Span 60 3%, Water 32%.

[0091] (III) How to use

[0092] The equipment to be cleaned is a small workpiece in the production process of EVA resin (the molecular weight of EVA resin dirt is 30000), and the dirt is in the form of yellowish large particles. The specific implementation method is as follows:

[0093] (1) Immerse the workpiece completely in the solution of decomposition and scavenger A, so that it can fully contact with the solution of decomposition and scavenger A.

[0094] (2) Heat and decompose scavenger A liquid, raise the temperature to 55°C and keep it, soak for 7 hours, the dirt will change from the original yellowish large particles to dark brown small p...

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Abstract

The invention relates to EVA resin fouling chemical decomposition scavenging agent A and B liquid and a using method thereof. The A liquid is prepared from 5-10 percent of potassium permanganate, 2-5 percent of trichloroisocyanuric acid, 5-10 percent of sodium hydroxide, 0.5-1 percent of heterogeneous alcohol ether, 0.5-1 percent of fatty alcohol polyoxyethylene ether and 73-87 percent of water. The B liquid is prepared from 30-40 percent of trichloroethylene, 20-40 percent of methanol, 3-5 percent of a water-in-oil emulsifier and 15-47 percent of water. When the EVA resin fouling chemical decomposition scavenging agent A and B liquid is used, the A liquid is used firstly, and then the B liquid is used, wherein the A liquid mainly has the action of oxidative decomposition, the B liquid mainly has the action of dissolution scavenging, the two of the A liquid and the B liquid are mutually matched to effectively lower the viscosity and the toughness of fouling, and the purpose of lightly and rapidly scavenging the fouling is achieved; and in addition, the decomposition scavenging agent is safe in use, simple to use and operate and high in washing cleanliness.

Description

technical field [0001] The invention relates to the technical field of cleaning chemicals in fine chemical industry, in particular to an EVA resin dirt chemical decomposition and removal agent and a use method thereof. Background technique [0002] For a long time, the cleaning and removal of organic polymer dirt such as EVA resin (ethylene-vinyl acetate copolymer) has been a problem faced by such manufacturers in the maintenance process, especially for resin synthesis production or similar product companies, because this The chemical properties of these substances are extremely stable. Due to the long-chain combination and the strong bond energy, the adhesive viscosity is very large. This is the advantage of resin products in normal use, but when encountered in production and life This advantage becomes the biggest obstacle when it needs to be decomposed and removed. For example, such polymers in the production device are glued to the equipment body. If they are not removed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D1/825C11D3/60C11D3/04C11D3/28C11D3/20C11D7/60C11D7/26C11D7/30C11D1/66
CPCC11D1/667C11D1/72C11D1/825C11D3/044C11D3/046C11D3/28C11D7/261C11D7/266C11D7/30
Inventor 王奋善黄汉华师海龙王奋伟钱丁辰张少平梁嘉轩张彬强李星陆东文
Owner 上海兰林清洗有限公司
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