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Process for preparing carboxylic acid salts and catalysts useful in such process

A catalyst and carboxylate technology, applied in the field of carboxylate preparation, can solve the problems of increased dehydrogenation, decreased dehydrogenation and the like

Inactive Publication Date: 2000-07-26
MONSANTO TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the dehydrogenation effect increased when the copper loading increased to a certain limit, and the dehydrogenation effect decreased when the copper loading increased further.

Method used

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  • Process for preparing carboxylic acid salts and catalysts useful in such process
  • Process for preparing carboxylic acid salts and catalysts useful in such process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This example illustrates the preparation method of the catalyst of the present invention in detail.

[0044] Into a 1 L glass beaker placed on a magnetic stir plate and equipped with a 5 cm long magnetic stir bar coated with Teflon was added 169 ml of distilled water and powdered 5% by weight iridium-activated carbon (available from Degussa Corporation of Ridgefield Park, NJ commercially available) (on a dry basis, it corresponds to 13.37 g). In another 1 L beaker was prepared the copper plating solution: the following ingredients were added in the order indicated below with stirring, most of which were commercially available from MacDermid, Inc. of Waterbury, CT:

[0045] (1) 687ml deionized water

[0046] (2) 90ml MACuPlex Ultra Dep 1000B *

[0047] (3) 54ml MACuPlex Ultra Dep 1000A *

[0048] (4) 18ml MACuPlex Ultra Dep 1000D *

[0049] (5) 5ml 37% w / w formaldehyde

[0050] * MacDermid's patented product

[0051] Total volume 854ml

[0052] Following Ma...

Embodiment 2

[0060] This example describes another method for preparing the catalyst of the present invention.

[0061] Distilled water (190 ml) was added to a 2 L glass beaker placed on a magnetic stir plate and equipped with a 2.5 cm long magnetic stir bar coated with Teflon, followed by 5% by weight osmium-activated carbon (commercially available from Degussa Corporation) ( Equivalent to 16.42g (dry weight)). An aqueous copper plating solution was prepared in a 4L beaker with stirring by adding the following ingredients:

[0062] (1) 500ml deionized water

[0063] (2)NaKC 4 h 4 o 6 4H 2 O(tartrate) [29.99 g, 0.106 mol]; stir until dissolved

[0064] (3) Dissolve 11.79g CuSO in another beaker 4 ·5H 2 O(3g Cu)(0.047mol) in 400ml deionized water

[0065] (4) Add the copper sulfate solution (3) to the obtained tartrate solution (2)

[0066] (5) Add 13.60g 50% NaOH (0.17 mol)

[0067] (6) 11.35ml 37% formaldehyde (0.15mol)

[0068] Total volume 1125ml

[0069] The resulting pla...

Embodiment 3

[0071] Example 2 was repeated, but ingredients (1)-(5) were mixed together with the iridium-activated carbon substrate, and then formaldehyde was added dropwise to the resulting mixture over 30 minutes.

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Abstract

Supported catalyst useful in the preparation of carboxylic acid salts, said catalyst comprising an alkali resistant support, a plurality of metal particles selected from the group consisting of osmium, iridium and rhodium and a coating of a catalytically active metal selected from the group of copper, cobalt, nickel, cadmium or mixtures thereof.

Description

Background of the invention [0001] This invention relates to a process for the preparation of carboxylates, and more particularly, the present invention relates to a process for the preparation of carboxylates by the reaction of primary alcohols with hydroxide bases in the presence of novel catalysts. The invention also relates to the preparation method of the catalyst and its composition. [0002] Carboxylate salts can be used in different ways. Said salts can be neutralized to give the corresponding acids, which are useful in many ways (such as raw materials for pharmaceuticals, agrochemicals, insecticides, etc. or their precursors). Many of these carboxylic acids are commercially available in large quantities. [0003] US Patent 4,782,183 (Goto et al.) discloses a process for the preparation of aminocarboxylates comprising reacting an aminoalcohol with an alkali metal hydroxide in the presence of a Raney copper catalyst or a copper catalyst supported on zirconia. [0004...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/02C07B61/00C07C51/295C07C51/41C07C57/44C07C59/305C07C227/02C07C229/08C07F9/38
CPCC07C227/02B01J37/0217B01J23/89B01J37/0215C07F9/3813C07C51/41C07C59/305
Inventor J·R·埃布纳T·S·弗兰茨克
Owner MONSANTO TECH LLC