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Method for preparing polyether polyol by continuous process

A technology of polyether polyol and continuous process is applied in the field of continuous process for preparing polyether polyol, which can solve the problems of low monomer conversion rate and complicated process.

Active Publication Date: 2008-11-12
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the catalyst in the prior art can only be a bimetallic catalyst, and the catalyst needs to be pre-activated, which makes the process complicated and the monomer conversion rate is low. Method for preparing polyether polyol with low unsaturation degree by complex catalyst continuous method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A. Preparation of multimetal cyanide complex catalyst

[0029] 7.20 g K 3 [CoCN 6 ] and 0.84 g K 2 [CoFeCN 6 ] Add 140 milliliters of deionized water to make it dissolve, slowly add 38.5% ZnCl at a speed of (2000~8000) rev / min 2 65 grams of aqueous solution. Subsequently, a mixed solution of 100 milliliters of tert-butanol and 100 milliliters of deionized water was added, and after stirring for 10 minutes, 14.7 grams of dimethyl phthalate and 200 milliliters of deionized water were added, stirred for 10 minutes, and filtered with a sand core funnel. Add 150 ml of tert-butanol and 60 ml of deionized water to the obtained solid, stir evenly, add 10.6 g of dimethyl phthalate, stir for 10 minutes, and then separate by filtration. Add 200 ml of tert-butanol to the obtained solid, stir evenly, add 6.7 g of dimethyl phthalate, stir for 10 minutes, and then separate by filtration. The solid was vacuum-dried at 60° C. to a constant weight to obtain 13.15 g of solid powder ...

Embodiment 2

[0065] A. Preparation of multimetal cyanide complex catalyst

[0066] 6.40 g K 3 [CoCN 6 ] and 1.68 g K 2 [CoFeCN 6 ] Add 140 milliliters of deionized water to make it dissolve, slowly add 38.5% ZnCl at a speed of (2000~8000) rev / min 2 65 grams of aqueous solution. Subsequently, a mixed solution of 100 milliliters of tert-butanol and 100 milliliters of deionized water was added, and after stirring for 10 minutes, 14.7 grams of dimethyl phthalate and 200 milliliters of deionized water were added, stirred for 10 minutes, and filtered with a sand core funnel. Add 150 ml of tert-butanol and 60 ml of deionized water to the obtained solid, stir evenly, add 10.6 g of dimethyl phthalate, stir for 10 minutes, and then separate by filtration. Add 200 ml of tert-butanol to the obtained solid, stir evenly, add 6.7 g of dimethyl phthalate, stir for 10 minutes, and then separate by filtration. The solid was vacuum-dried at 60° C. to constant weight to obtain 13.28 g of solid powder Ca...

Embodiment 3

[0102] A. Preparation of multimetal cyanide complex catalyst

[0103] 5.60 g K 3 [CoCN 6 ] and 2.52 g K 2 [CoFeCN 6 ] Add 140 milliliters of deionized water to make it dissolve, slowly add 38.5% ZnCl at a speed of (2000~8000) rev / min 2 65 grams of aqueous solution. Subsequently, a mixed solution of 100 milliliters of tert-butanol and 100 milliliters of deionized water was added, and after stirring for 10 minutes, 14.7 grams of dimethyl phthalate and 200 milliliters of deionized water were added, stirred for 10 minutes, and filtered with a sand core funnel. Add 150 ml of tert-butanol and 60 ml of deionized water to the obtained solid, stir evenly, add 10.6 g of dimethyl phthalate, stir for 10 minutes, and then separate by filtration. Add 200 ml of tert-butanol to the obtained solid, stir evenly, add 6.7 g of dimethyl phthalate, stir for 10 minutes, and then separate by filtration. The solid was vacuum-dried at 60° C. to a constant weight to obtain 13.40 g of solid powder ...

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Abstract

The invention relates to a method for preparing unsaturated polyether polyols by utilizing a continuous method and a polymetallic cyanide complex as a ring opening polymerization catalyst of oxyalkylene. The method mainly resolves the problems exiting in prior art that the catalyst is only a bi-metallic catalyst and needs pre-activation, and the process is complicated and the conversion rate of monomer is relatively low. In the invention, the technical proposal which better resolves the problems is as follows: the polymetallic cyanide complex catalyst, an initiator and the oxyalkylene are continuously added in a reactor for preparing the unsaturated polyether polyols, and the polyether polyols obtained are continuously taken out of the reactor. The method is applied to the industrial preparation of polyether polyols by the continuous method.

Description

technical field [0001] The invention relates to a method for preparing polyether polyols by a continuous method, in particular to a method for preparing polyether polyols with low unsaturation and narrow molecular weight distribution by a continuous method using a highly active multimetal cyanide complex catalyst, and can be used A method in which the conversion rate of olefin oxide reaches 99.998% in a short period of time. Background technique [0002] Polyether polyol is an important intermediate for the preparation of polyurethane, and is widely used in the preparation of polyurethane foam, elastomers, coatings, adhesives, fibers, synthetic leather and paving materials. Alkali (KOH) is usually used as a catalyst for the ring-opening polymerization of olefin oxides to prepare polyether polyols. Propylene oxide is prone to isomerization under the action of alkali (KOH) to generate allyl alcohol, and allyl alcohol is used as an initiator to carry out ring-opening polymeriz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/06C08G65/12C08G18/48
Inventor 陈凤秋涂建军曾歉王荣伟张惠明宋虹霞王巍
Owner CHINA PETROCHEMICAL CORP
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