Process and catalyst for dehydrogenating primary alcohols to make carboxylic acid salts
AssigneeMonsanto Company
InventorsDavid A. Morgenstern, Juan P. Arhancet, Howard C. Berk, William L. Moench JR., James C. Peterson
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Abstract
This invention is directed to a process for dehydrogenating primary alcohols to make salts of carboxylic acids. The process comprises contacting a catalyst, preferably a metal support coated with copper or silver, with an alkaline mixture comprising a primary alcohol. The invention further provides for novel copper-containing and silver-containing catalysts which may be used, for example, in the above process as well as processes for making such catalysts.
Claims96
A catalyst comprising:
- a metal support comprising (a) at least about 10% (by weight) copper, and (b) at least about 10% (by weight) non-copper metal;
- and
- a copper-containing coating comprising from about 0.005 to about 0.5 grams of copper (per gram of said metal support).
A catalyst comprising:
- a metal support comprising (a) at least about 10% (by weight) silver, and (b) at least about 10% (by weight) non-silver metal;
- and
- a silver-containing coating comprising from about 0.005 to about 0.5 grams of silver (per gram of said metal support).
A process for making N-(phosphonomethyl)glycine or a salt thereof from monoethanolamine, the process comprising:
- contacting a catalyst with an alkaline mixture comprising monoethanolamine to form glycine or a salt thereof;
- and
- converting said glycine or said glycine salt to N-(phosphonomethyl)glycine or a salt thereof.
A process for making N-(phosphonomethyl)glycine or a salt thereof from monoethanolamine, the process comprising:
- contacting a catalyst with an alkaline mixture comprising monoethanolamine to form glycine or a salt thereof;
- and
- converting said glycine or said glycine salt to N-(phosphonomethyl)glycine or a salt thereof;
- wherein:
- said catalyst comprises (a) a metal support comprising at least about 10% (by weight) non-copper metal;
- and (b) a copper-containing coating on the surface of said metal support, said copper-containing coating comprising from about 0.005 to about 0.5 grams of copper (per gram of said metal support);
- or
- said catalyst comprises a metal sponge comprising (a) at least about 15% (by weight) non-copper metal, and (b) at least about 10% (by weight) copper;
- or
- said catalyst comprises (a) at least about 15% (by weight) non-copper metal, (b) at least about 10% (by weight) copper, and (c) less than about 1% (by weight) metal oxide;
- or
- said catalyst comprises (a) at least about 15% (by weight) non-copper metal, (b) at least about 10% (by weight) copper, and (c) greater than about 1% (by weight) nickel, tin, chromium, tungsten, titanium, niobium, tantalum, vanadium, molybdenum, manganese, bismuth, antimony, lead, germanium, or a combination thereof.
Dependencies are inferred from the claim text.