Process for producing polyether polyols with low degree of unsaturation

A polyether polyol, saturation technology, applied in the field of preparation of low unsaturation polyether polyol, can solve the problem of long catalyst induction period, etc.

Inactive Publication Date: 2005-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that there is a long catalyst induction period in the preparation of low unsaturation polyether polyols in the prior art, and a new method for preparing low unsaturation polyether polyols is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A, preparation of double metal cyanide complex catalyst

[0023] 8 g of potassium hexacyanocobaltate was dissolved in 140 ml of distilled water. Slowly add 38.5% (weight) of ZnCl at 8000 rpm 2 65 grams of aqueous solution, then add a mixture of 100 milliliters of tert-butanol and 100 milliliters of distilled water. After stirring for 20 minutes, add 10.8 grams of orthosilicate and 200 milliliters of distilled water. After stirring for 10 minutes, vacuum filter with a sand core funnel. Add 150 milliliters of tert-butanol and 60 milliliters of distilled water to the obtained solid, stir at a speed of 8000 rpm for 10 minutes, then add 7.8 grams of methyl orthosilicate, stir for 10 minutes, and centrifuge. Add 200 ml of tert-butanol to the obtained solid, stir at 8000 rpm for 10 minutes, then add 4.9 g of methyl orthosilicate, stir for 10 minutes, and centrifuge. The solid was vacuum-dried at 60° C. to constant weight to obtain 12.6 g of solid powder Catalyst I.

[0024]...

Embodiment 2

[0039] A, preparation of double metal cyanide complex catalyst

[0040] 8 g of potassium hexacyanocobaltate was dissolved in 140 ml of distilled water. Slowly add 38.5% (weight) of ZnCl at 8000 rpm 2 Aqueous solution 65 grams, then add the mixed solution of 100 milliliters of tert-butanol and 100 milliliters of distilled water, after stirring for 20 minutes, add 14.7 grams of tetraethyl orthosilicate and 200 milliliters of distilled waters, after stirring for 10 minutes, vacuum filter with sand core funnel. Add 150 milliliters of tert-butanol and 60 milliliters of distilled water to the obtained solid, stir at a speed of 8000 rpm for 10 minutes, then add 10.6 grams of tetraethyl orthosilicate, stir for 10 minutes, and centrifuge. Add 200 ml of tert-butanol to the obtained solid, stir at 8000 rpm for 10 minutes, then add 6.7 g of tetraethyl orthosilicate, stir for 10 minutes, and centrifuge. The solid was vacuum-dried at 60° C. to a constant weight to obtain 12.8 g of solid p...

Embodiment 3

[0061] A, preparation of double metal cyanide complex catalyst

[0062] 8 g of potassium hexacyanocobaltate was dissolved in 140 ml of distilled water. Slowly add 38.5% (weight) of ZnCl at 8000 rpm 265 grams of aqueous solution, then add the mixed solution of 100 milliliters of tert-butanol and 100 milliliters of distilled water, after stirring for 20 minutes, add 22.7 grams of n-butyl orthosilicate and 200 milliliters of distilled water, after stirring for 10 minutes, vacuum filter with sand core funnel. Add 150 milliliters of tert-butanol and 60 milliliters of distilled water to the obtained solid, stir at a speed of 8000 rpm for 10 minutes, then add 16.2 grams of n-butyl orthosilicate, stir for 10 minutes, and centrifuge. Add 200 ml of tert-butanol to the obtained solid, stir at 8000 rpm for 10 minutes, then add 10.3 g of n-butyl orthosilicate, stir for 10 minutes, and centrifuge. The solid was vacuum-dried at 60° C. to a constant weight to obtain 12.5 g of solid powder c...

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Abstract

The invention relates to a process for producing polyether polyols with low degree of unsaturation, wherein the catalyst composition comprises bimetallic cyanide mixture, C4-C10 organic alcohol having a tertiary alcohol structure and selected from silicon acid esters or aliphatic esters, aromatic diester and organic esters of their mixtures, the catalyst can be applied into the industrial production of polyether polyols.

Description

technical field [0001] The present invention relates to a kind of preparation method of low unsaturation polyether polyol, especially to a kind of in the process of preparation low unsaturation polyether polyol, has high activity, short induction period and starter metal ion to catalyst A method with low performance impact. Background technique [0002] As we all know, when alkali is used as a catalyst (mainly KOH) to prepare polyether polyol by epoxide polymerization, due to the low catalytic activity, the crude product needs to undergo post-treatment processes such as acid neutralization, dehydration and decolorization. The obtained polyether polyol has a high degree of unsaturation, which will adversely affect polyurethane products, and it is also difficult to prepare high-molecular-weight polyether polyol with an alkaline (KOH) catalyst. [0003] Double metal cyanide catalysts can be used in the polymerization of epoxides to prepare low u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/08
Inventor 涂建军王荣伟张惠明金晖
Owner CHINA PETROLEUM & CHEM CORP
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