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Process for preparation of double metal cyanide (DMC) catalyst

A double metal cyanide and catalyst technology, applied in the direction of metal cyanide, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as not providing

Inactive Publication Date: 2006-04-26
BAYER MATERIALSCIENCE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] None of the above references provide means to reduce the amount of metal salt used in the catalyst preparation process to less than 100% excess transition metal salt

Method used

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  • Process for preparation of double metal cyanide (DMC) catalyst
  • Process for preparation of double metal cyanide (DMC) catalyst
  • Process for preparation of double metal cyanide (DMC) catalyst

Examples

Experimental program
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Effect test

Embodiment 3

[0091] DMC catalysts were prepared at a 2:2 Zn / Co molar ratio with addition of NaCl to maintain the molar ratio of metal salt anion to metal cyanide anion as follows: 1 L baffled round bottom flask equipped with mechanical paddle stirrer, heating mantle and thermometer . Deionized water (275 g) was added to the flask, followed by technical grade zinc chloride (6.07 g) and sodium chloride (60.0 g). Add enough zinc oxide to bring the system to an alkalinity of 6.48% ZnO. Tert-butanol (40.0 g) was then added and the solution was heated to 50°C with stirring at 400 rpm.

[0092] A second solution was prepared by dissolving potassium hexacyanocobaltate (7.4 g) in deionized water (100 g). The potassium hexacyanocobaltate solution was added to the zinc chloride solution over 1 hour. Stirring was continued for an additional 60 minutes at 50°C after the addition was complete. A third solution was prepared with 1000 Da diol (7.9 g), t-butanol (27.1 g) and water (14.9 g) and added to...

Embodiment 4

[0096] DMC catalysts were prepared at a Zn / Co molar ratio of 2.0 and NaCl was added to maintain the molar ratio of metal salt anion to metal cyanide anion as follows: A 1 L baffled round bottom flask was equipped with a mechanical paddle stirrer, heating mantle and thermometer. Distilled water (275 g) was added to the flask, followed by technical grade zinc chloride (5.73 g) and sodium chloride (60.0 g). Add enough zinc oxide to make the system alkalinity reach 3.73% ZnO. Tert-butanol (40.0 g) was then added and the solution was heated to 50°C with stirring at 400 rpm.

[0097] Potassium hexacyanocobaltate (7.4 g) was dissolved in distilled water (100 g) to prepare a second solution. The potassium hexacyanocobaltate solution was added to the zinc chloride solution over 1 hour. Stirring was continued for an additional 60 minutes at 50°C after the addition was complete. A third solution was prepared with 1000 Da diol (7.9 g), t-butanol (27.1 g) and water (14.9 g) and added to...

Embodiment 5

[0101] DMC catalysts were prepared at a Zn / Co molar ratio of 1.5 and NaCl was added to maintain the molar ratio of metal salt anion to metal cyanide anion as follows: A 1 L baffled round bottom flask was equipped with a mechanical paddle stirrer, heating mantle and thermometer. Distilled water (275 g) was added to the flask, followed by technical grade zinc chloride (4.22 g) and sodium chloride (60.0 g). Add enough zinc oxide to make the system alkalinity reach 4.88% ZnO. Tert-butanol (40.0 g) was then added and the solution was heated to 50°C with stirring at 400 rpm.

[0102] Potassium hexacyanocobaltate (7.4 g) was dissolved in distilled water (100 g) to prepare a second solution. The potassium hexacyanocobaltate solution was added to the zinc chloride solution over 1 hour. Stirring was continued for an additional 60 minutes at 50°C after the addition was complete. A third solution was prepared with 1000 Da diol (7.9 g), t-butanol (27.1 g) and water (14.9 g) and added to...

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Abstract

The present invention provides processes for making double metal cyanide (DMC) catalysts, by simultaneously controlling the alkalinity of the transition metal salt, the molar ratio of water to total cations, the molar ratio of ligand to transition metal cation, the molar ratio of metal salt anion to metal cyanide anion, and the presence of a polymeric complexing ligand during the catalyst precipitation step. The substantially amorphous catalysts made by the present invention are highly active and may find use in the production of polyols.

Description

technical field [0001] The present invention generally relates to the preparation method of double metal cyanide (DMC) catalyst, more particularly relate to by simultaneously controlling the basicity of the metal salt that is used to prepare catalyst, the molar ratio of water and total cation, the mole of ligand and transition metal cation Ratio, and / or the molar ratio of metal salt anion to metal cyanide anion, a method for preparing a substantially amorphous DMC catalyst at a low molar ratio of transition metal salt to metal cyanide salt. Background technique [0002] The use of double metal cyanide (DMC) complexes to catalyze the polymerization of epoxides is well known to those of ordinary skill in the art. Double metal cyanide (DMC) catalysts with active hydrogen atoms for the polyaddition of alkylene oxides with starter compounds are described, for example, in US Pat. These active catalysts yield polyether polyols with lower saturation than sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/26
CPCB01J27/26B01J35/002C08G65/2663C01C3/08
Inventor G·G·科布斯K·G·麦达尼尔
Owner BAYER MATERIALSCIENCE AG
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