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Silicone rubber polymerization by-product recovery treatment system and method

A technology for recycling and by-products, applied in the direction of silicon organic compounds, etc., can solve the problem of inability to effectively remove non-polymerized low-component odor substances and color-developing substances, and achieve fast evaporation, short residence time, and high heat transfer efficiency Effect

Active Publication Date: 2019-10-25
合盛硅业(泸州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a silicone rubber polymerization by-product recovery and treatment system and its treatment method, which can effectively solve the problem of not being able to effectively remove non-polymerized low components and odor substances in the existing defective DMC. and color-developing substances

Method used

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  • Silicone rubber polymerization by-product recovery treatment system and method
  • Silicone rubber polymerization by-product recovery treatment system and method

Examples

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Effect test

Embodiment 1

[0026] like figure 1 As shown, the silicone rubber polymerization by-product recovery treatment system includes a defective DMC storage tank 1, a preheating delivery pump 2, a preheater 3, a thin film evaporator 4, a cooler 5, and a dry defective DMC storage tank connected in sequence. 6. Refining delivery pump 7, refining kettle 8, plate and frame filter press 9, and product storage tank 10.

Embodiment 2

[0028] A method for recovering and treating silicone rubber polymerization by-products, comprising the following steps:

[0029] (1) The defective DMC in the defective DMC storage tank is transported into the preheater through the preheating pump, and the defective DMC is heated to 65°C in the preheater, and then enters the film evaporation with a pressure of -50KPa In the thin-film evaporator, it is heated to 110°C, and continuous rapid vacuum distillation is performed to remove non-polymerizable low-components and trimethylamine; then, the temperature is lowered to below 60°C through a cooler and stored in dry defective product storage Standby in the tank; (defective DMC is called dry defective DMC after removing non-polymerizable low components and trimethylamine)

[0030] (2) Transport the dry defective product DMC to the refining kettle through the refining delivery pump, stop feeding when the raw material in the refining kettle reaches 80% of its volume, and add activate...

Embodiment 3

[0034] A method for recovering and treating silicone rubber polymerization by-products, comprising the following steps:

[0035] (1) The defective DMC in the defective DMC storage tank is transported into the preheater through the preheating pump, and the defective DMC is heated to 50°C in the preheater, and then enters the film evaporation with a pressure of -60KPa In the thin film evaporator, it is heated to 100°C, and continuous rapid vacuum distillation is performed to remove non-polymerizable components and trimethylamine; then, the temperature is lowered to below 60°C through a cooler and stored in dry defective product storage Standby in the tank; (defective DMC is called dry defective DMC after removing non-polymerizable low components and trimethylamine)

[0036] (2) Transport the dry defective product DMC to the refining kettle through the refining delivery pump, stop feeding when the raw material in the refining kettle reaches 80% of its volume, and add activated ca...

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Abstract

The invention discloses a silicone rubber polymerization by-product recovery treatment system and method. The silicone rubber polymerization by-product recovery treatment method comprises the following steps that (1) a silicone rubber polymerization by-product is conveyed to a preheater, heated to 50-80 DEG C, conveyed to a film evaporator with the pressure intensity being -50 KPa to -60 KPa, heated to 100-110 DEG C and distilled for 10-15 h; and (2) a product obtained in the step (1) is cooled till the temperature is lower than 60 DEG C and conveyed to a refining kettle, the addition quantityof the product is 2 / 3 to 4 / 5 of the volume of the refining kettle, then activated carbon and diatomite are added, stirring is conducted at 20-50 r / min for 30-60 min, and filtering is conducted. The silicone rubber polymerization by-product treated through the method has the colorless and odourless characteristics, and meets the indexes of reutilizing and producing high-quality silicone rubber.

Description

technical field [0001] The invention belongs to the technical field of recovery and treatment of by-products, and in particular relates to a recovery and treatment system and a treatment method for by-products of silicone rubber polymerization. Background technique [0002] Silicone raw rubber uses siloxane mixed rings (DMC) as the main raw material for production. During the process, it is necessary to remove the unpolymerized siloxane mixed rings in the silicone rubber raw rubber at high temperature under a certain degree of vacuum. The released siloxane mixed rings are condensed and collected at the front end of the vacuum system, which is called low molecular weight, and can be directly recycled as raw materials for silicone rubber production. The unpolymerized siloxane mixed rings condensed at the back end of the vacuum system or even in the vent recovery system Due to the low content of the main raw rubber polymerization monomer D4 in this part of the low molecular wei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/21
CPCC07F7/21
Inventor 陈建刚吕强兰永平陈震汪令杰
Owner 合盛硅业(泸州)有限公司