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Method for reducing content of volatile organic compounds in polyether polyol

A technology of volatile organic compounds and polyether polyols, which is applied in the field of chemical synthesis, can solve problems such as increasing production costs, and achieve the effects of saving production costs, reducing concentrations, and improving production efficiency

Active Publication Date: 2020-03-17
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs a specific catalyst to remove the propionaldehyde in the polyether polyol, which increases the production cost

Method used

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  • Method for reducing content of volatile organic compounds in polyether polyol
  • Method for reducing content of volatile organic compounds in polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 1000g of polyether polyol to be treated into a 5-liter stainless steel reactor, nitrogen replacement 3 times (oxygen content in the reactor ≤ 100ppm), start the reactor to stir, heat the material in the reactor to 50°C, and pour it under the protection of nitrogen Add 0.01g aldehyde remover (propylene glycol: phosphoric acid: 2 functionalities, 400 molecular weight polyether polyol = 1:1:1) into the reactor, during which the reactor stirrer keeps rotating), and nitrogen replacement is carried out on the reactor (reaction Oxygen content in the kettle ≤ 100ppm), and stirred for 10 minutes, then added 10g of pure water and 1g of magnesium silicate adsorbent to the reaction kettle, stirred for 10 minutes respectively, and then nitrogen bubbled the above materials, and dried under reduced pressure , Filtration, the polyether polyol finished product is obtained.

Embodiment 2

[0027] Add 1000g of polyether polyol to be treated in a 5-liter stainless steel reactor, nitrogen replacement 3 times (oxygen content in the reactor ≤ 100ppm), start the reactor to stir, heat the material in the reactor to 130°C, and pour it under the protection of nitrogen Add 0.5g aldehyde remover to the reaction kettle (a mixture of ethylene glycol and tert-butanol with a mass ratio of 1:1: a mixture of sulfuric acid and nitric acid with a mass ratio of 1:1: a 2-functionality, 4000 molecular weight with a mass ratio of 1:1 Polyether polyol and polyether polyol mixture with 3 functionalities of 3000 molecular weight = 1:5:50), during which the stirrer of the reactor kept rotating, the reactor was replaced with nitrogen (oxygen content in the reactor ≤ 100ppm), and the timing was stirred After 120 minutes, 100g of pure water and 10g of aluminum silicate adsorbent were successively added to the reaction kettle, stirred for 120 minutes respectively, and then the above materials ...

Embodiment 3

[0029] Add 1000g of polyether polyol to be treated in a 5-liter stainless steel reactor, nitrogen replacement 3 times (oxygen content in the reactor ≤ 100ppm), start the reactor to stir, heat the material in the reactor to 110°C, and pour it under the protection of nitrogen Add 0.05g of aldehyde remover (ethylene glycol: sulfuric acid: 3 functionalities, 3000 molecular weight polyether polyol = 1:5:20) into the reactor, during which the reactor stirrer keeps rotating, and the reactor is replaced with nitrogen ( Oxygen content in the reaction kettle ≤ 100ppm), and stirred for 20 minutes, then added 20g of pure water and 8g of magnesium aluminum silicate adsorbent to the reaction kettle, stirred for 20 minutes respectively, and then carried out nitrogen bubbling to the above materials, reduced Drying under pressure and filtering to obtain the finished polyether polyol.

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Abstract

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for reducing the content of volatile organic compounds in polyether polyol. The method comprises the steps: adding polyether polyol to be treated into a reaction kettle, carrying out nitrogen replacement, stirring, heating, adding an aldehyde removal agent into the reaction kettle under the protection of nitrogen, carrying out nitrogen replacement after the addition is finished, continuously stirring for 10-120 minutes, respectively adding pure water and a refined adsorbent, stirring, drying, and filtering to obtain the finished product, wherein the aldehyde removing agent is composed of an aldehyde removing agent A, an aldehyde removing agent B and an auxiliary agent C, the addition amount of the aldehyde removing agent is 0.001-0.05% of the mass of the polyether polyol to be treated, and the mass ratio of the aldehyde removing agent A to the aldehyde removing agent B to the auxiliary agent C is 1:1:1-1:5:50. According to the method, aldehyde ketone substances in the polyether polyol to be treated are directly oxidized and decomposed into small molecular substances or removed through esterification reaction by a chemical reaction method, and the volatile organic compounds can be effectively removed through nitrogen bubbling evaporation purification and physical adsorption.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a method for reducing the content of volatile organic compounds in polyether polyols. Background technique [0002] With the continuous improvement of people's living standards, the problems of ecological livability and healthy travel have attracted widespread attention from the whole society. The state has improved and revised the standards for passenger cars, and released the national standard "Guidelines for Air Quality Evaluation in Passenger Cars (Revised GB_T27630-2011)". According to this standard, the formaldehyde content is required not to exceed 0.1mg / m 3 , the content of acetaldehyde is not more than 0.2mg / m 3 , acrolein content not exceeding 0.05mg / m 3 . Multinational manufacturers of high-end car seats have formulated procurement standards for the main raw material polyether polyol according to this standard, requiring that the content of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/30
CPCC08G65/30
Inventor 张莹刘沂郭辉李晓张涛高铭
Owner SHANDONG BLUSR DONGDA CHEM
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