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Catalyst and method for preparing branched unsaturated aldehydes

An unsaturated, resinous technology that can be used in chemical instruments and methods, catalysts for physical/chemical processes, dehydrogenation preparations, etc., and can solve problems such as adverse economic effects

Active Publication Date: 2015-12-23
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, said No. 3,037,052 patent achieves only 85% selectivity for the desired product
A 15% loss of undesired products represents a significant economic detriment

Method used

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  • Catalyst and method for preparing branched unsaturated aldehydes
  • Catalyst and method for preparing branched unsaturated aldehydes
  • Catalyst and method for preparing branched unsaturated aldehydes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1 : Comparison of macroporous resin and gel resin

[0069] 30 mL of sulfonated polystyrene catalysts (MR1, MR2, GL1, and GL2) (purchased from The Dow Chemical Company, Midland, MI) were packed into a flow-through column reactor with an inner diameter of 1.58 cm. Use the butyraldehyde raw material that butyraldehyde quality is 97.7% purity, make described butyraldehyde raw material be that 2MPa and flow rate are under the condition of 250sccm under inert gas pressure at 4LHSV (hour -1 ) flows through the reactor. The temperature used was 80°C. Conversion and selectivity were determined by GC method.

[0070] Table 1: Comparison of gel-type and macroporous network resins. Conversion and selectivity.

[0071]

[0072] The present invention provides excellent selectivities at the high conversions available.

Embodiment 2

[0073] Example 2 : Macroporous resin with low volumetric exchange capacity

[0074] 30 mL of sulfonated polystyrene catalyst (MR3) (available from The Dow Chemical Company, Midland, MI) was packed into a flow-through column reactor with an inner diameter of 1.58 cm. Use the butyraldehyde raw material that butyraldehyde quality is 97.7% purity, make described butyraldehyde raw material be 0.7MPa and flow rate be 50sccm (cm 3 / min) at 4LHSV (hour -1 ) flows through the reactor. The temperature used was 80°C. Conversion and selectivity were determined by GC method.

[0075]

[0076] The present invention provides excellent selectivities at the high conversions available.

Embodiment 3

[0077] Example 3 : Gel type resin and low butyraldehyde raw material concentration method.

[0078] 30 mL of sulfonated polystyrene catalyst (GL3) (purchased from The Dow Chemical Company, Midland, MI) was packed into a flow-through column reactor with an inner diameter of 1.58 cm. Butyraldehyde solution was prepared by diluting in isooctane at a ratio of 20 / 80 (w / w) and used as starting material. Then the solution is inert gas pressure of 1MPa and flow rate of 100sccm (cm 3 / min) at 4LHSV (hour -1 ) flows through the reactor. The temperature used was 130°C. Conversion and selectivity were determined by GC method. GL3 is a gel-type sulfonated polystyrene resin catalyst.

[0079]

[0080] Sodium butyrate was not detected in the product of this reaction using GC-MS.

[0081] The present invention provides excellent selectivities at the high conversions available.

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Abstract

A continuous process and system for the preparation of branched-chain aldehydes by reacting the aldehyde with an acid polymer catalyst free of any metal selected from Group VIII to obtain a product containing from about 10 to 99.99% by weight branched unsaturated aldehydes with a reaction selectivity of at least 92% to said branched aldehydes and recovering a portion of said product.

Description

technical field [0001] This invention relates to the use of catalysts in the preparation of branched-chain aldehydes. In particular, the present invention relates to the use of acid polymer heterogeneous catalysts to produce branched unsaturated aldehydes which can then be hydrogenated to produce branched alcohols, or which can be Oxidation of chain unsaturated aldehydes to produce branched chain acids. Background technique [0002] branched unsaturated C 2n Aldehydes can be converted from C using a catalyst n Aldehyde synthesis. In many applications, the conversion of aldehydes is accomplished by homogeneous catalysis using base catalysts. As described in WO93 / 20034, this patent concerns a continuous process in which aldehydes, catalysts and water are reacted followed by separation to give unsaturated branched C 2n Aldehyde, water, C n Aldehydes and impurities. However, since the catalyst is homogeneous, some catalyst is discharged along with any by-products (such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/74C07C47/21B01J31/06B01J35/00
CPCC07C45/74C07C47/21C07C45/78C07C47/20C07C47/02C07C45/002
Inventor M·C·贝克J·F·塔特R·J·奥尔森J·A·特雷乔-欧雷利
Owner DOW GLOBAL TECH LLC