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Hydrogenation method for hydroformylation mixture

A technology of olefin hydrogenation and fixed bed catalyst, which is applied in the preparation of organic compounds, organic chemical methods, chemical instruments and methods, etc., can solve the problems of high specific energy consumption and achieve low energy consumption

Inactive Publication Date: 2002-07-17
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of this method is the high specific energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] operation hours

[0043] It can be seen from Table 1 that when the hydrogenation of isononanal is carried out without water in the raw material, the high boiling point compound is not decomposed but formed instead. Example 2 (according to the invention): C 9 - Hydrogenation of aldehydes / crude aldehydes containing water as starting material

Embodiment 2

[0044] operation hours

[0045] As can be seen from Table 2, during the hydrogenation of the crude isononanal in the presence of water in the starting material part of the high boilers decomposes to form valuable products and the formate reacts more rapidly and almost quantitatively. After hydrogenation, the liquid reactor effluent contained 1.01% by weight of water. Embodiment 3 (according to the invention): C 9 - Hydrogenation of aldehydes / feedstocks containing water and low amounts of high boilers

Embodiment 3

1.49

[0047] As can be seen from Table 3, isononyl formate is rapidly converted into the valuable product isononyl alcohol in the hydrogenation of isononanal in the presence of water homogeneously dissolved in the raw material.

[0048] After a run time of one hour, the high boiler content stabilized to a constant value of approximately 1.46% by weight.

[0049] After hydrogenation, the liquid reaction mixture contained 0.70% by weight of water.

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PUM

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Abstract

The present invention provides a process, which includes: in a homogeneous liquid phase including water, and over a fixed-bed catalyst, continuously hydrogenating at least one hydroformylation product obtained from a hydroformylation of one or more C4-16 olefins to produce at least one output mixture; wherein the output mixture includes at least one corresponding alcohol and from 0.05 to 10% by weight of water; and wherein in a steady-state operation of the process, from 3 to 50% more hydrogen is fed to the hydrogenation than is consumed by the hydrogenation.

Description

technical field [0001] The present invention relates to a process for the hydrogenation of hydroformylation mixtures, ie the production of alcohols by hydrogenation of aldehydes in the liquid phase in the presence of water. Background technique [0002] Alcohols can be prepared by catalytic hydrogenation of aldehydes obtained, for example, by hydroformylation of alkenes. A large number of alcohols are used as solvents and as intermediates for the preparation of many organic compounds. Important downstream products of alcohols are plasticizers and detergents. [0003] Aldehydes are known to form alcohols by catalytic reduction with hydrogen. Catalysts comprising at least one metal of Groups 1b, 2b, 6b, 7b and / or 8 of the Periodic Table of the Elements are frequently used. The hydrogenation of aldehydes can be carried out continuously or discontinuously in the gas or liquid phase using powdered or stacked / shaped catalysts. [0004] For the industri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86C07B41/02C07B61/00C07C29/14C07C29/141C07C31/02C07C31/125C07C45/50C07C47/02
CPCC07C29/141C07C31/125C07C45/50
Inventor A·凯兹克B·肖尔茨W·比施肯W·特特施D·古比施J·舒勒C·克诺普
Owner EVONIK DEGUSSA GMBH
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