A process for the selective production of ethanol by vapor phase reaction of acetic acid over a hydrogenating catalyst composition to form ethanol is disclosed and claimed. In an embodiment of this invention reaction of acetic acid and hydrogen over either cobalt and palladium supported on graphite or cobalt and platinum supported on silica selectively produces ethanol in a vapor phase at a temperature of about 25O0C.

Ethanol production from acetic acid utilizing a cobalt catalyst

A process for selective formation of ethanol from acetic acid includes contacting a feed stream containing acetic acid and hydrogen at an elevated temperature with catalyst comprising platinum and tin on a high surface area silica promoted with calcium metasilicate Selectivities to ethanol of over 85% are achieved at 280° C with catalyst life in the hundreds of hours

Tunable catalyst gas phase hydrogenation of carboxylic acids

Catalysts and processes for forming catalysts for use in hydrogenating acetic acid to form ethanol. In one embodiment, the catalyst comprises a first metal, a silicaceous support, and at least one metasilicate support modifier. Preferably, the first metal is selected from the group consisting of copper, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, platinum, titanium, zinc, chromium, rhenium, molybdenum, and tungsten. In addition the catalyst may comprise a second metal preferably selected from the group consisting of copper, molybdenum, tin, chromium, iron, cobalt, vanadium, tungsten, palladium, platinum, lanthanum, cerium, manganese, ruthenium, rhenium, gold, and nickel.

Catalysts for making ethanol from acetic acid

Catalyst in powdered form comprising a major amount of the oxides of a first metal selected from copper or zinc, a second metal selected from chromium, molybdenum, tungsten and vanadium, and optionally, a minor amount of the oxide of a promoter metal. The average particle diameter is from 6 to 20 microns and the particle surface area is from 20 to 70 m2/g. Process for preparing said catalyst which comprises the steps of: (A) adding to a first vessel, (1) a first aqueous solution comprising a copper or zinc salt, and (2) a second aqueous solution comprising a soluble base, or (3) a third aqueous solution comprising a soluble salt of at least one second metal, (B) advancing at least a portion of the aqueous slurry from the first vessel to a second vessel; (C) recovering the solids from the second vessel; and (D) calcining the recovered solids. Catalysts of the invention are useful in both fixed bed and slurry phase reactions for hydrogenating aldehydes, ketones, carboxylic acids and carboxylic acid esters.

Hydrogenation catalyst, process for preparing and process of using said catalyst

A process for selective formation of ethanol from acetic acid by hydrogenating acetic acid in the presence of first metal, a silicaceous support, and at least one support modifier. Preferably, the first metal is selected from the group consisting of copper, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, platinum, titanium, zinc, chromium, rhenium, molybdenum, and tungsten. In addition the catalyst may comprise a second metal preferably selected from the group consisting of copper, molybdenum, tin, chromium, iron, cobalt, vanadium, tungsten, palladium, platinum, lanthanum, cerium, manganese, ruthenium, rhenium, gold, and nickel.

Processes for making ethanol from acetic acid

The invention relates to a method for hydrogenating an organic compound which has at least one carbonyl group. According to said method, the organic compound is brought into contact with a shaped body in the presence of hydrogen, said shaped body being produced according to a method in which: (i) an oxidic material containing copper oxide, zinc oxide and aluminium oxide is prepared; (ii) powder-form metallic copper or powder-form cement or a mixture thereof is added to said oxidic material; and (iii) the mixture resulting from (ii) is moulded into a shaped body.

Catalyst and method for hydrogenating carbonyl compounds

In a process for steam-reforming methanol, in which methanol and water are reacted at a catalyst with formation of hydrogen, the catalyst used can be prepared by (a) precipitating a solution of zinc salts and aluminum salts, the atomic ratio of Zn:Al being from 3:1 to 1:3, with an alkali metal carbonate solution or alkali metal hydroxide solution at a pH in the range from 5 to 12 and at from 20 to 100° C., (b) separating off and washing the precipitate to remove alkali metal ions, (c) drying the precipitate, (d) calcining the precipitate at from 250 to 800° C. to give a mixed oxide, (e) dispersing the mixed oxide in an acidic solution of copper salts and zinc salts, the atomic ratio of Cu:Zn being from 1:5 to 20:1 in the solution, (f) precipitating the dispersion with an alkali metal carbonate solution or alkali metal hydroxide solution at a pH in the range from 6 to 9 and at from 20 to 100° C., (g) carrying out the steps (b) to (d), the solutions in steps (a) and/or (e) can additionally comprise salts or oxides of one or more elements selected from the group consisting of the platinum metals, groups 4, 5, 11 and the lanthanides of the Periodic Table of the Elements, or the salts or oxides can be applied to the mixed oxides.

Catalyst for steam-reforming methanol

Copper-containing catalysts for low temperature shift conversion at from 150° to 300° C. and under from 10 to 40 bar, which additionally contain aluminum and zinc, if necessary in the form of the compounds or oxides and are prepared by coprecipitation, the copper-containing catalysts containing potassium and having a BET surface area adapted to the potassium content, and the potassium content being brought to 0.1-3.0% by weight at a BET surface of from 30 to 160 m 2 /g, are used for the preparation of hydrogen and carbon dioxide from carbon monoxide and water.

Copper-containing catalyst for low temperature shift conversion

Catalysts containing passivated copper and zinc oxide and/or alumina are prepared by (1) precipitating a mixture of catalyst precursor components dissolved or suspended in a diluent with anion-containing precipitating agents, washing and drying to form a solid catalyst precursor in the form of powder or granules, (2) calcining the solid catalyst precursor obtained in stage (1) to an anion content from the precipitating agent of from 0.1 to 2.5% by weight and (3) shaping and, if required, reducing and passivating the calcined catalyst precursor from stage (2) in any desired order to form the catalyst.

Preparation of catalysts having low volume shrinkage

A methanol reforming catalyst containing passivated copper and zinc oxide and/or alumina can be prepared by (1) precipitating or spray-drying a mixture of catalyst precursor components dissolved or suspended in a diluent in order to form a solid catalyst precursor in the form of powder or granules, (2) calcining and reducing the solid catalyst precursor obtained in stage (1), (3) passivating the reduced catalyst precursor obtained in stage (2) and (4) shaping the passivated catalyst precursor obtained in stage (3) to form the catalyst. A reduction in the volume shrinkage and an increase in the mechanical hardness during operation of the methanol reforming catalyst are achieved by the preparation process.

Michael Jolyon Dr Sprague

Papers

Catalyst and method for hydrogenating carbonyl compounds

Catalyst for steam-reforming methanol

Copper-containing catalyst for low temperature shift conversion

Preparation of catalysts having low volume shrinkage

Methanol reforming catalyst having a reduced volume shrinkage