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Continuous preparation of low-unsaturated polyether polyatomic alcohol

A technology of polyether polyol and continuous method, which is applied in the field of continuous preparation of polyether polyol, can solve the problems of complex process and low monomer conversion rate, etc.

Active Publication Date: 2008-11-12
SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC
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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 needs to be pre-activated during the continuous production of polyether polyols in the prior art, which makes the process complicated and the monomer conversion rate is low. Method for preparing polyether polyol with low unsaturation degree by continuous method of compound catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A, preparation of double metal cyanide complex catalyst

[0028] 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, stir for 20 minutes, add 14.7 grams of dimethyl phthalate and 200 milliliters of distilled water, stir for 10 minutes, then 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 10.6 grams of dimethyl phthalate, 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 dimethyl phthalate, stir for 10 minutes, and centrifuge. The solid was vacuum-dried at 60° C. to a constant weight to obtain 12.9 g of solid powder Catalyst I.

[0029] After an...

Embodiment 2

[0042] A, preparation of double metal cyanide complex catalyst

[0043] 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, stir for 20 minutes, add 14.7 grams of diethyl phthalate and 200 milliliters of distilled water, stir for 10 minutes, then 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 10.6 grams of diethyl phthalate, 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 diethyl phthalate, stir for 10 minutes, and centrifuge. The solid was vacuum-dried at 60° C. to a constant weight to obtain 11.2 g of solid powder Catalyst II.

[0044] After anal...

Embodiment 3

[0057] A, preparation of double metal cyanide complex catalyst

[0058] 8 g of potassium hexacyanocobaltate was dissolved in 140 ml of distilled water. Slowly add 38.5% (weight) of ZnC 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, stir for 20 minutes, add 14.7 grams of dibutyl phthalate and 200 milliliters of distilled water, stir for 10 minutes, then 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 10.6 grams of dibutyl phthalate, stir for 10 minutes, and centrifuge. Add 200 ml of tert-butanol to the obtained solid, stir at 8000 r / min for 10 minutes, then add 6.7 g of dibutyl phthalate, stir for 10 minutes, and centrifuge. The solid was vacuum-dried at 60° C. to constant weight to obtain 12.4 g of solid powder Catalyst III.

[0059] After anal...

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Abstract

The invention relates to a method for preparing unsaturated polyether polyols by utilizing a continuous method and a bi-metallic cyanide complex as the ring opening polymerization catalyst of oxyalkylene. The method mainly resolves the problems exiting in prior art that the catalyst needs the pre-activation when the catalyst is used to continuously prepare the polyether polyols, 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 bi-metallic 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 high-activity double metal cyanide complex catalyst, and can make 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 polymeriza...

Claims

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Application Information

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IPC IPC(8): C08G65/12C08G65/06C08G18/48
Inventor 曾歉涂建军张惠明陈凤秋金晖王荣伟
Owner SHANGHAI RES INST OF PETROCHEMICAL TECH SINOPEC