Patent GB-1320204-A (GB)
Title: Catalytic process for producing hydrogen from carbon monoxide and steam
IPC: C01B3/00
Filed: 1970-07-23
Abstract: 1320204 Water-gas shift reaction catalysts INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS 23 July 1970 [25 July 1969] 35733/70 Heading B1E [Also in Division C5] Catalyst for use in the preparation of hydrogen from carbon monoxide and steam comprises, in the form of oxidic material, (a) copper, (b) at least one trivalent metal selected from aluminium, chromium, manganese, iron and cobalt and, optionally, (c) at least one divalent metal selected from magnesium, cadmium and cobalt, at least 60 weight per cent (preferably the whole) of such oxidic material having a spinel (including inverted spinel) structure. The catalyst additionally may comprise carrier material, for example selected from silica, alumina, magnesia, silica-alumina, silica-magnesia, metal aluminates and silicon carbide. Catalyst which does not contain carrier material may be prepared either by mixing a solution containing compounds of the metals (a), (b) and, optionally, (c) with a heatdecomposable gel-forming compound and decomposing the resulting gel by heating to a temperature of at least 200‹C or by mixing a solution containing compounds of the metals (a), (b) and, optionally, (c) with a heat-decomposable complex-forming organic compound, evaporating solvent from the resulting mixture and decomposing the resulting viscous liquid or amorphous solid by heating to a temperature of at least 200‹C. Catalyst which does contain carrier material may be prepared by contacting carrier material with a solution containing compounds of the metals (a), (b) and, optionally, (c) and with a heat-decomposable gelforming or complex-forming organic compound, with contactings may be effected in either order, evaporating solvent from the resulting mixture and treating the resulting material to a temperature of at least 200‹C. The gel-forming compound may be shellac, adraganth gum, Senegal gum, Dammer gum, Carouba gum, alginic acid, an alginate, a polyvinyl alcohol, a urea-formaldehyde resin, a carboxyvinyl polymer, a polyethylene oxide, carboxymethylcellulose, methylcellulose, a polyglycol, a polymethacrylate, a polyethanolamine, an oxide wax or a glue; the complexforming organic compound may be a polycarboxylic acid, a hydroxy acid, an amino acid, a keto acid or a salt of any such acid. The heating to a temperature of at least 200‹C may be effected, optionally after drying, in a neutral, reducing or oxidizing atmosphere, for example air, at a temperature of from 300 to 660‹C. Examples relate to the preparation of catalyst, using a gel-forming/complex-forming compound which is adraganth gum (Examples 1 to 5, 7 and 11) or Senegal gum (Examples 6 and 8) or citric acid (Examples 9 and 12) or tartaric acid (Example 10), in which the metals of the oxidic material are copper and either chromium (Examples 1 and 9) or iron (Example 2) or aluminium (Examples 3 and 11) or chromium and iron (Example 4) or chromium and cadmium (Example 5) or chromium, aluminium and magnesium (Example 6) or chromium and cobalt (Example 7) or chromium, iron and cadmium (Example 8) or chromium, cadmium and manganese derived from a manganese (II) compound (Example 10) or iron and aluminium (Example 12), the oxidic material 'being either unsupported (Examples 1 to 8) or supported on carrier material which is alumina (Examples 9 and 10) or silica (Example 11) or silicon carbide (Example 12.