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High-stability polyether and production method and application thereof

A production method and high stability technology, applied in the field of chemical building materials, can solve the problems of reducing the conversion rate of polyether, affecting the dispersion performance of polycarboxylate superplasticizer, and affecting the copolymerization of polyether, so as to improve stability and product quality , Excellent dispersion performance

Inactive Publication Date: 2020-12-01
安徽海螺材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of a polymerization inhibitor will affect the copolymerization of polyether and unsaturated carboxylic acid, reduce the conversion rate of polyether, and affect the dispersion performance of polycarboxylate water reducer

Method used

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  • High-stability polyether and production method and application thereof
  • High-stability polyether and production method and application thereof
  • High-stability polyether and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of production method of high stability polyether, comprises the following steps:

[0039] 1) Catalyst configuration: under the protection of nitrogen, add 1000kg of methallyl alcohol to the reaction kettle, the pressure is 5kPaG, heat up to 40°C, add 0.33kg of copper acetate, stir and dissolve, add 33kg of metal sodium, and react until no hydrogen is generated ;

[0040] 2) Alkoxylation reaction: Transfer the methallyl alcohol with the catalyst configured in step 1) to the gas-liquid contact reactor, raise the temperature to 110°C, add ethylene oxide, and carry out the alkoxylation reaction. The speed of ethylene oxide is controlled at a reaction temperature of 130°C and a pressure of 0.4MPaG. After adding 32340kg of ethylene oxide, heat-preserve and mature for 0.5h to obtain a crude polyether product;

[0041] 3) Post-treatment: Transfer the crude polyether product to a post-treatment kettle, lower the temperature to 85°C, vacuumize, blow in nitrogen to remove ...

Embodiment 2

[0043] A kind of production method of high stability polyether, comprises the following steps:

[0044] 1) Catalyst configuration: under the protection of nitrogen, add 1000kg of methallyl alcohol, the pressure is 4kPaG, heat up to 45°C, add 0.83kg of copper acetate, stir to dissolve, add 33kg of sodium metal, and react until no hydrogen is generated;

[0045] 2) Alkoxylation reaction: Transfer the methallyl alcohol with the catalyst configured in step 1) to the gas-liquid contact reactor, raise the temperature to 112°C, add ethylene oxide, and carry out the alkoxylation reaction. The speed of ethylene oxide is controlled at a reaction temperature of 132°C and a pressure of 0.45 MPaG. After adding 32,327 kg of ethylene oxide, it is incubated for 0.5 hours to obtain a crude polyether product;

[0046] 3) Post-treatment: Transfer the crude polyether product to a post-treatment kettle, lower the temperature to 85°C, vacuumize, blow in nitrogen to remove small molecule by-products...

Embodiment 3

[0048] A kind of production method of high stability polyether, comprises the following steps:

[0049] 1) Catalyst configuration: under the protection of nitrogen, add 1000kg of methallyl alcohol, the pressure is 5kPaG, heat up to 42°C, add 0.83kg of copper citrate, stir to dissolve, add 33kg of sodium metal, and react until no hydrogen is generated;

[0050] 2) Alkoxylation reaction: Transfer the methallyl alcohol with the catalyst configured in step 1) to the gas-liquid contact reactor, raise the temperature to 115°C, add ethylene oxide, and carry out the alkoxylation reaction. The speed of ethylene oxide is controlled at a reaction temperature of 135°C and a pressure of 0.38MPaG. After adding 32,315kg of ethylene oxide, it is incubated for 0.5h to obtain a crude polyether product;

[0051] 3) Post-treatment: transfer the crude polyether product to a post-treatment kettle, lower the temperature to 85°C, vacuumize, blow in nitrogen to remove small molecular by-products, adju...

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Abstract

The invention provides high-stability polyether and a production method and application thereof. According to the high-stability polyether and the production method and the application thereof, a small amount of a copper salt is added in the preparation process of the polyether, so that the storage stability of the polyether is improved. Compared with the prior art, the method has the advantages that the copper salt is added before the alkylation reaction, so that the alkoxylation intermediate product is more stable, the double bond retention rate of the polyether product is higher, and the product quality can be further improved. The dispersing performance of the polycarboxylate superplasticizer is more excellent.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials, and relates to a high-stability polyether and its production method and application, in particular to a preparation method of high-stability alkenyl alcohol polyoxyethylene ether and its use in the production of polycarboxylate water reducers application. Background technique [0002] Polycarboxylate superplasticizer is a high-performance dispersant for concrete, which can significantly reduce the water consumption of concrete, increase the strength of concrete, improve the construction performance of concrete, and improve the compactness and durability of concrete; under the premise of constant strength , can reduce the consumption of clinker in concrete, and burning clinker requires a lot of electricity and coal and emits a lot of CO 2 , NO x , SO 2 , dust and other pollutants can significantly save energy and reduce emissions, and have significant economic and social ben...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08F283/06C08F220/06C04B24/26C04B103/30
CPCC08G65/2609C08G65/2696C08F283/065C04B24/2605C04B2103/302
Inventor 曾君许庚友陈烽陈名秀宋南京司宏振
Owner 安徽海螺材料科技股份有限公司