Method for preparing double metal cyanide catalyst

A double metal cyanide and catalyst technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of multiple raw materials and the unbearable cost of catalyst preparation for industrial production, and achieve simple process, Save raw materials and energy consumption, the effect of low consumption

Inactive Publication Date: 2012-10-31
HAINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But generally speaking, in the above-mentioned process of preparing DMC catalyst with the improved method, still need to consume more raw material and time, the cost of preparing catalyst is still unbearable for industrialized production

Method used

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  • Method for preparing double metal cyanide catalyst
  • Method for preparing double metal cyanide catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Zinc chloride (0.738g) and potassium hexacyanoferrate (III) (0.600g) were placed in the ball mill jar of the planetary ball mill, set to rotate at 600r / min, revolution at 120r / min, and run for 25 minutes. After the reaction was completed, the product was transferred to a Buchner funnel for filtration with a mixed solution of 15 mL of tert-butanol and water (1:1 by volume). Dry to constant weight in a vacuum oven at 55°C and grind to obtain a yellow powder, which is ready for use.

Embodiment 2

[0027] Zinc chloride (0.870g) and potassium hexacyanocobaltate (III) (0.626g) were operated according to the procedure in Example A to finally obtain a white powder for subsequent use.

Embodiment 3

[0029] In Example A, while adding the reactants, 300 μL of 1, 1, 1, 2, 2, 3, 4, 5, 5, 5 decafluoropentane was added, and ground for 18 minutes. Finally a yellow powder was obtained.

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Abstract

The invention belongs to the field of chemical engineering, and particularly provides a method for preparing a double metal cyanide catalyst. The method comprises the following steps of: mixing water soluble metal salt and water soluble metal cyanide, and then carrying out mechanical ball milling to ensure that the water soluble metal salt and the water soluble metal cyanide undergo a mechanical chemical reaction; and removing the product, cleaning with a mixed solution, separating the precipitate, and drying the precipitate under a vacuum condition to obtain the double metal cyanide catalyst. The method is easy, can be used for synthesizing the double metal cyanide catalyst under a mechanical ball milling condition. The process is simple, consumes less time, has low usage of organic compounding ingredient and low cost, can greatly save raw materials and reduce energy consumption, and is suitable for industrial production and application.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a method for preparing a catalyst, in particular to a method for preparing a double metal cyanide (DMC) catalyst, and more specifically to a method for utilizing a water-soluble cyanide and a water-soluble metal salt under mechanical ball milling conditions Method for synthesizing DMC catalyst. Background technique [0002] Double metal cyanide (DMC) is a well-known multi-purpose catalyst, which can be used to catalyze reactions such as copolymerization of epoxide and carbon dioxide, homopolymerization of epoxide, and copolymerization of epoxide and cyclic anhydride (lactone), respectively. The production of polycarbonate, polyether, polyester, and their block copolymers is fully described in, for example, US patents 3278457, 3404109, 3538043, 3900518, 3941849, 4472560, 4500704, 5145883, 5223583 and Chinese patent 89100701.6. In these traditional DMC preparation methods, a metal c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/26C08G64/34
Inventor 张武元卢凌彬林强成一林波潘莉莎徐鼐王亦云
Owner HAINAN UNIVERSITY
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