摘要:
A chromium-containing xerogel, suitable for employment in a composition comprising a polymerization catalyst, is produced by incorporating the chromium in the hydrogel and separating water therefrom.
摘要:
A PROCESS FOR THE OXIDATION OF OLEFINS TO THE CORRESPONDING UNSATURATED ALDEHYDES AND ACIDS, E.G., PROPYLENE TO ACROLEIN AND ACRYLIC ACID, BY REACTING THE OLEFIN WITH OXYGEN IN THE PRESENCE OF A CATALYST OF THE EMPIRICAL FORMULA
MOACOBTECXDOE
WHEREIN X IS RHODIUM OR BORON. WHEN A IS 100, B IS 40200, C IS 0.1-7.0 AND D IS 5-75 WHEN X IS RHODIUM AND IS 0.1 TO 3.0 WHEN X IS BORON.
摘要:
A CATALYST FOR OXIDATION OF SO2 TO SO3, WHICH CAN BE USED AS A FLUIDIZED BED CATALYST. AN ABRASIVE RESISTNT SUPPORT IS FORMED BY ADDING SILICA FILER AND A CLAY BINDER TO A SILICA SOL; ADDING HYDRATED MAGNESIUM OXIDE TO THE RESULTING MIXTURE, TO FORM A GELLABLE COMPOSITION; DISPRESING THE GELLABLE COMPOSITION IN A LIQUID TO FORM GEL SPHERES; CALCINING THE SPHERES; AND TREATING THEN WITH AN ACID TO REMOVE SOLUBLE COMPONENTS. AFTER THE ACID TREATMENT. THE SUPPORT IS IMPREGNATED WITH AN ALKALIMETAL VANDADATE SOLUTION AND CALCINED.
摘要:
Ethanol is prepared by contacting ethylene and liquid water or an aqueous solution of an inert solvent with a catalytic amount of a prereduced catalyst consisting of a blue tungsten oxide on a zirconia support at 250*-350* C., 750-5,000 psi, and a mole ratio of water to ethylene of 5:1 to 25:1.
摘要:
An improved process for hydrogenating organic compounds is provided in which a catalyst is employed that has a nickel surface area greater than about 70 m2/g and a sodium content less than 0.2 wt. % based on the total weight of catalyst. Significantly improved activity is obtained with the nickelsililca catalyst of this invention particularly in conversion of benzene to cyclohexane and in reducing oxo aldehydes to alcohols. The catalyst is prepared by coprecipitating nickel and silicate ions in the presence of a porous silica support under conditions of dilution that favor high surface areas and low inclusion of sodium in the catalyst.
摘要:
A HYDROFINING CATALYST IS PREPARED BY COGELATION OF HYDROUS ALUMINA AND A GROUP VI METAL OR METAL COMPOUND, WASHING SAID GEL TO REMOVE OCCLUDED SALTS AND THEN CONTACTING THE WASHED GEL WITH AN ORGANIC SOLVENT BEFORE THE GEL IS DRIED AND CALCINED. THIS CONTACTING STEP, WHICH MAY BE CARRIED OUT WITH METHANOL OR ETHANOL, SERVES TO EXTRACT WATER FROM THE HYDROUS GEL AND THUS PROVIDES LESS SHRINKAGE OF THE GEL AFTER FINAL DRYING.
摘要:
Manufacture of a molybdenum and iron containing catalyst in a four-stage process comprising reacting a solution containing molybdenum in an anionic form with a solution containing iron in a cationic form so as to obtain a precipitate, admixing said precipitate with an ammonium salt NH4A,A being an anion, drying the resulting mixture at 40*-150*C and heating the dried product to 300*-500*C.