A kind of catalyst for preparing polyol, its preparation method and application

A catalyst and polyol technology, applied in the field of catalysts for preparing polyols, can solve the problems of low catalytic activity of the catalyst, inability to take into account high carbonate unit content and low cyclic carbonate content, etc.

Active Publication Date: 2022-05-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Adopt the above-mentioned double metal cyanide to carry out carbon dioxide-epoxide copolymerization, the obtained copolymerization product can not take into account high carbonate unit content and low cyclic carbonate content, meanwhile, the catalytic activity of catalyst is not high

Method used

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preparation example Construction

[0033] The invention provides a kind of preparation method that is used to prepare the catalyst of polyhydric alcohol, comprises the following steps:

[0034] Under the action of the first initiator, the double metal cyanide compound and the epoxide are polymerized to obtain a catalyst for preparing polyol;

[0035] The first initiator includes one or more of active hydrogen-containing compounds and active hydrogen-containing polymers.

[0036] In some embodiments of the present invention, the preparation method of the catalyst comprises the following steps:

[0037] A) Evacuate the weighing bottle at 75-85°C, fill with protective gas for 1.5-2.5 hours, and cool to room temperature;

[0038] B) under the atmosphere of protective gas, add the first starter and double metal cyanide in the weighing bottle to obtain a mixture;

[0039] C) Evacuate the reactor at 75-85°C, fill it with a protective gas for 1.5-2.5 hours, cool to room temperature, and add epoxy to the cooled reacto...

Embodiment 1

[0106] Evacuate the weighing bottle at 80°C and fill with CO 2 Gas treatment 2h (inflated 6 times), and cooled to room temperature; 2 Under the protection of air, add 10.0g of DMC (based on Zn 3 [Co(CN) 6 ] 2 double metal cyanide) and 25.0g sebacic acid to obtain a mixture;

[0107] Put the 500mL reactor at 80°C, after evacuation, fill with CO 2 Treat for 2h (inflate 6 times), and cool to room temperature, add the mixture in the reaction kettle, then add 100g propylene oxide to the reaction kettle through the connection of the catalyst weighing bottle, stir at a speed of 500rpm, pass carbon dioxide The pressure regulator feeds carbon dioxide into the reactor, and the reactor is placed in a constant temperature bath for polymerization. The carbon dioxide pressure for polymerization is 4.0Mpa, the polymerization reaction temperature is 80°C, and the polymerization reaction time is 4h. After the end of the polymerization reaction, unreacted monomers and carbon dioxide are s...

Embodiment 2

[0111] Evacuate the weighing bottle at 80°C and fill with CO 2 Gas treatment 2h (inflated 6 times), and cooled to room temperature; 2 Add 10.0g of DMC (based on Zn 3 [Co(CN) 6 ] 2 double metal cyanide) and 25.0g adipic acid to obtain a mixture;

[0112] Put the 500mL reactor at 80°C, after evacuation, fill with CO 2 Treat for 2h (inflate 6 times), and cool to room temperature, add the mixture in the reaction kettle, then add 100g propylene oxide to the reaction kettle through the connection of the catalyst weighing bottle, stir at a speed of 500rpm, pass carbon dioxide The pressure regulator feeds carbon dioxide into the reactor, and the reactor is placed in a constant temperature bath for polymerization. The carbon dioxide pressure for polymerization is 2.0Mpa, the polymerization reaction temperature is 80°C, and the polymerization reaction time is 4h. After the end of the polymerization reaction, unreacted monomers and carbon dioxide are slowly discharged, and the reac...

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Abstract

The invention relates to the technical field of catalysts, in particular to a catalyst for preparing polyols, its preparation method and application. The preparation method of the catalyst for preparing polyols comprises the following steps: under the action of a first initiator, double metal cyanides and epoxides are polymerized to obtain catalysts for preparing polyols; the first The initiator includes one or more of active hydrogen-containing compounds and active hydrogen-containing polymers. The catalyst prepared by the invention can be used for the copolymerization of carbon dioxide and epoxide, and the obtained copolymerization product has a higher content of carbonate units and a lower content of cyclic carbonates.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for preparing polyols, its preparation method and application. Background technique [0002] Using carbon dioxide as a raw material and reacting it with epoxides to prepare polymer materials is one of the most promising ways to efficiently utilize carbon dioxide carbon resources, and has attracted the attention of researchers. Since Mr. Inoue Shohei (Macramol.chem., 1969, 130, 210) of Japan reported the polymer prepared by the reaction of carbon dioxide and propylene oxide in 1969, the research on catalyst preparation in this field has emerged in an endless stream. Scientists from various countries have successively developed ZnEt2-multiple Proton compound system, rare earth ternary system, phenoxy zinc system, β-diimine system, Salen system, etc., and achieved certain success. [0003] The double metal cyanide (DMC) reported in the 1960s can efficiently catalyze th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/26C08G65/28C08G64/34
CPCC08G65/2615C08G65/2663C08G65/2612C08G64/34
Inventor 乔立军付双滨王雪松苗宇阳王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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