Catalyst for block polyether synthesis and application thereof

A block polyether and catalyst technology, applied in the application field of block polyether synthesis, can solve the problem of wide molecular weight distribution of block polyether

Active Publication Date: 2013-02-13
SHANGHAI DUOLUN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some applications, the narrower the molecular weight distribution of the block polyether, the better, but the block polyether molecular weight distribution obtained by the catalyst of the above-mentioned prior art basic substance is generally wider

Method used

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  • Catalyst for block polyether synthesis and application thereof
  • Catalyst for block polyether synthesis and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Charge C into a 2L reactor with stirring, electric heating jacket, and internal water cooling coil 12～14 Mix alcohol 386g, 14.1 grams of catalysts, and seal the reaction kettle. Replace the atmosphere in the reactor with nitrogen for three times, start stirring, heat up to 80°C and carry out vacuum treatment under the pressure of -0.09MPa for 60min, then raise the temperature to 140°C and maintain this temperature, slowly pass in ethylene oxide, pass Control the feeding speed of ethylene oxide to keep the reaction pressure at 0.2MPa, stop the feeding after feeding a total of 441 grams of ethylene oxide, and carry out the aging reaction at 140°C for 3 hours; then heat up to 140°C and maintain this temperature, Slowly feed propylene oxide, keep the reaction pressure at 0.2MPa by controlling the feeding speed of propylene oxide, stop feeding after feeding a total of 581g of propylene oxide, carry out the aging reaction at 140°C for 3 hours, and lower the temperature to 60...

Embodiment 2

[0028] Charge C into a 2L reactor with stirring, electric heating jacket, and internal water cooling coil 12～14Mix alcohol 386g, 14.1 grams of catalysts, and seal the reaction kettle. Replace the atmosphere in the reactor with nitrogen for three times, start stirring, heat up to 80°C and carry out vacuum treatment under the pressure of -0.09MPa for 60min, then raise the temperature to 140°C and maintain this temperature, slowly pass in ethylene oxide, pass Control the feeding speed of ethylene oxide to keep the reaction pressure at 0.2MPa, stop the feeding after feeding a total of 441 grams of ethylene oxide, and carry out the aging reaction at 140°C for 3 hours; then heat up to 140°C and maintain this temperature, Slowly feed propylene oxide, keep the reaction pressure at 0.2MPa by controlling the feeding speed of propylene oxide, stop feeding after feeding a total of 581g of propylene oxide, carry out the aging reaction at 140°C for 3 hours, and lower the temperature to 60°...

Embodiment 3

[0031] Charge C into a 2L reactor with stirring, electric heating jacket, and internal water cooling coil 12～14 Mix alcohol 386g, 14.1 grams of catalysts, and seal the reaction kettle. Replace the atmosphere in the reactor with nitrogen for three times, start stirring, heat up to 80°C and carry out vacuum treatment under the pressure of -0.09MPa for 60min, then raise the temperature to 140°C and maintain this temperature, slowly pass in ethylene oxide, pass Control the feeding speed of ethylene oxide to keep the reaction pressure at 0.2MPa, stop the feeding after feeding a total of 441 grams of ethylene oxide, and carry out the aging reaction at 140°C for 3 hours; then heat up to 140°C and maintain this temperature, Slowly feed propylene oxide, keep the reaction pressure at 0.2MPa by controlling the feeding speed of propylene oxide, stop feeding after feeding a total of 581g of propylene oxide, carry out the aging reaction at 140°C for 3 hours, and lower the temperature to 60...

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Abstract

The invention relates to a catalyst for block polyether synthesis and application thereof to block polyether synthesis. The invention mainly solves the technical problem of wide distribution of the molecular weight of the block polyether in the prior art. The catalyst for block polyether synthesis comprises the following component in part by mole: 1 part of alkaline compound and 0.1 to 2 parts of crown ether, wherein the alkaline compound is selected from any one of alkali metal hydroxide, alkaline earth hydroxide, alkali metal oxide, alkali metal methoxide or alkali metal ethoxide; and the crown ether is selected from at least one of 18-crown ether-6 or benzo 18-crown ether-6. By adoption of the technical scheme, the technical problem is solved well and the catalyst can be applied to industrial production of the block polyether with narrow molecular weight.

Description

technical field [0001] The present invention relates to the catalyst that is used for block polyether synthesis and its application in block polyether synthesis, especially relates to the block that the initiator containing active hydrogen atom successively reacts with ethylene oxide and / or propylene oxide Applications in polyether synthesis. Background technique [0002] CN1183180C discloses the method for synthesizing the long-chain polyether polyol with high primary hydroxyl content under the presence of DMC catalyst, it is in the presence of DMC, as the oxirane / propylene oxide mixture of capping group in the presence of active hydrogen The polyaddition reaction on the atomic starting compound is carried out at a temperature of 20 to 200° C., at a total pressure of 0.001 to 20 bar and optionally in the presence of an inert organic solvent (claim 7). Its embodiment 1~5 discloses more specific operation steps, taking its embodiment 1 as an example: [0003] Get poly(oxypr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26
Inventor 朱学文侯海育林真意徐兴建杨健
Owner SHANGHAI DUOLUN CHEM
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