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Method for catalytical synthesis of alkoxy aluminum from alcohol and aluminum

A technology for synthesizing aluminum alkoxides and aluminum alkoxides, which is applied in the preparation of metal alkoxides, etc., can solve the problems of affecting the use effect of aluminum alkoxides, difficulty in purification of reaction products, and difficulty in completing the reaction, so as to reduce operating costs, The effect of high yield and reduction of side reactions

Inactive Publication Date: 2003-06-18
TIANJIN CHEM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The reaction between hexanol and aluminum is difficult to complete due to the oxide film on the aluminum
Looking at the descriptions of various patents, the conversion rate is relatively low, and it is difficult to purify the reaction product, which directly affects the use effect of aluminum alkoxide.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In a 2-liter autoclave with stirring and condenser, add 420 grams of hexanol with a content of 99.5%, add 28 g of reagent metal aluminum flakes, and then add iodine, titanium carboxylate and aluminum alkoxide in a weight ratio of 1:0.05:5 The composite catalyst 0.08g. Raise the temperature to 120°C to start the reaction, maintain the temperature at 180°C, and control the pressure at 0.04MPa. After a large amount of hydrogen gas is released, continue the reaction for 2 hours, then lower the temperature. The conversion rate of the analysis reaction is 99.2%, which is based on the conversion calculation of metal aluminum. .

Embodiment 2

[0032] In a 2-liter autoclave with stirring and condenser, add 420 grams of hexanol with a content of 99.5%, add 28 g of metal aluminum powder, and then add iodine, titanium carboxylate and aluminum alkoxide in a weight ratio of 1:0.04:4 Composite catalyst 0.08g. Raise the temperature to 160°C to start the reaction, maintain the temperature at 180°C, and control the pressure at 0.04MPa. After a large amount of hydrogen gas is released, continue the reaction for 2 hours, then lower the temperature. The conversion rate of the analysis reaction is 96.1%, which is based on the conversion calculation of metal aluminum. .

Embodiment 3

[0034] In a 2-liter autoclave with stirring and condenser, add 420 grams of hexanol with a content of 99.5%, add 28 g of metal aluminum powder, and then add iodine, titanium carboxylate and aluminum alkoxide in a weight ratio of 1:0.03:5 Composite catalyst 0.1g. Raise the temperature to 160°C to start the reaction, maintain the temperature at 180°C, and control the pressure at 0.04MPa. After a large amount of hydrogen gas is released, continue the reaction for 2 hours, then lower the temperature. The conversion rate of the analysis reaction is 98.0%, which is based on the conversion calculation of metal aluminum. .

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Abstract

A process for catalytically synthesizing aloxylaluminium from alcohol and aluminium features that under the action of the compoiste catalyst consisting of iodine, organic soluble Ti salt and aloxyl aluminium compound, the C4-C10 alcohol and aluminium take part in catalytic reaction at 120-200 deg.c and -0.4 MPa for 1-6 hr. Its advantages are simple process, high output rate, and low cost.

Description

technical field [0001] The invention belongs to the technical field of catalytic synthesis, in particular to a method for catalytically synthesizing alkoxy aluminum with alcohol and aluminum. Background technique [0002] Trialkoxy aluminum, referred to as aluminum alkoxide, is an important chemical intermediate and has important uses in chemical synthesis, special ceramics and the preparation of high-purity alumina. [0003] The synthesis method of aluminum alkoxide has been studied abroad as early as the 1950s and 1960s. The initial Alfol method is to use ethylene and aluminum to react to form triethylaluminum, and then carry out telomerization and chain extension to form high-alkyl aluminum. Under certain conditions, it is oxidized in the air to produce long-chain aluminum alkoxide, and it was industrialized in the 1970s. This method of producing aluminum alcohol was originally designed for the preparation of high-carbon alcohols, and the alumina produced after hydrolysis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/70C07C31/32
Inventor 常俊石蒋建明张涛
Owner TIANJIN CHEM RES & DESIGN INST
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