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Process for the preparation of aldehydes

An aromatic and alkyl ester technology, applied in hydrogenolysis preparation, organic chemistry methods, chemical instruments and methods, etc., can solve the problems of expensive realization and maintenance of protective gas conditions

Inactive Publication Date: 2010-06-02
LONZA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The protective gas conditions required in industrial-scale reduction plants are expensive to achieve and maintain

Method used

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  • Process for the preparation of aldehydes
  • Process for the preparation of aldehydes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The first reactant in Feed-1 was set at 2.3% by weight and the second reactant in Feed-2 was set at 24.9% by weight. The reaction temperature was set at 0°C.

Embodiment 2

[0052] The first reactant in Feed-1 was set at 10.0% by weight and the second reactant in Feed-1 was set at 24.9% by weight. The reaction temperature was set at 0°C.

Embodiment 3 to 5

[0054] The first reactant in Feed-1 was set at 2.3% by weight and the second reactant in Feed-2 was set at 24.9% by weight. The reaction temperature was set at -20°C. Different types of pumps were used in Examples 3-5 to provide Feed-1 and Feed-2.

[0055] Table 1:

[0056] implement

[0057] implement

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PUM

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Abstract

The present invention is related to a method for the production of an aldehyde by reducing an ester of a carboxylic acid with H-DIBAL (diisobutylaluminium hydride).

Description

technical field [0001] The present invention relates to a process for the preparation of aldehydes by reduction of esters of carboxylic acids with H-DIBAL (diisobutylaluminum hydride). Background technique [0002] DE-A1-100 14 298 generally discloses the reduction of organic compounds with hydrides in microreactors. The only example in DE-A1-100 14 298 discloses the reduction of esters of carboxylic acids with H-DIBAL at room temperature to give the corresponding alcohols. [0003] WO-A 01 / 70649 claims the reduction of organic compounds with hydrides in a microreactor and discloses the reduction of esters of carboxylic acids to the corresponding alcohols in the presence of DIBAL-H in a microreactor. [0004] WO-A 99 / 22857 discloses hydrogenation in the presence of hydrogen and fluorination in the presence of fluorine in microreactors. The fluorination reaction is carried out at an elevated temperature of about 20-180°C. [0005] EP-A 0855395 discloses the reduction of a ...

Claims

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Application Information

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IPC IPC(8): C07C45/41C07C47/02C07B31/00C07B41/06
CPCC07B41/06C07C45/41C07B31/00C07C47/02
Inventor 洛朗·迪克吕多米尼克·罗贝热迈因拉德·马赛耶迈克尔·高特斯邦那
Owner LONZA LTD
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