Abstract:
Boron phosphate containing minor amounts of sulfate- and/or sodium-containing salts provides an improved dehydration catalyst for the synthesis of nitriles from carboxylic compounds or derivatives thereof and ammonia.
Abstract:
A process for the manufacture of a solid phosphoric acid catalyst. A siliceous adsorbent is admixed with a polyphosphoric acid. The mixture is heated at an elevated temperature and thereafter extruded. High activity - high strength extrudate particles are produced by drying the extrudate first in a steam atmosphere and then in a dry air atmosphere.
Abstract:
A catalyst composite comprising a metal of Group VIB and Group VIII and from about 1 to about 5 weight percent boron phosphate composited with a refractory inorganic oxide and characterized by a pore volume of at least about 0.4 cc. per gram in the 100-500 A. range. The catalyst composite is particularly useful for hydrorefining petroleum crude oils and residual crude oils.
Abstract:
A PROCESS AND A CATALYST FOR THE PREPARATION OF 1,3CYCLOHEXANEDIAMINES ARE PROVIDED. THE PROCESS COMPRISES HYDROGENATING 1,3-PHENYLENEDIAMINES IN THE PRESENCE OF AN ALKALI-PROMOTED CATALYST CONSISTING OF COBALTOUS OXIDE, CALCIUM OXIDE, AND SODIUM CARBONATE AT ELEVATED TEMPERATURE AND UNDER MODERATE PRESSURE TO FORM 1,3-CYCLOHEXANEDIAMINES. THE ALIPHATIC DIAMINES ARE USEFUL AS INTERMEDIATES IN THE PREPARATION OF POLYURETHANE, POLYUREA, POLYURETHANE-POLYUREA AND POLYAMIDE COATINGS, SEALANTS, AND ELASTOMERS.
Abstract:
A PROCESS FOR PRODUCING CATALYSTS WITH LARGER AVERAGE PORE DIAMETERS WHICH COMPRISES (A) FORMING A HYDROGEL COMPRISING AT LEAST ONE INORGANIC OXIDE, (B) ADDING A DETERGENT TO THE HYDROGEL, AND (C) CARRYING OUT AT LEAST PART OF THE DRYING OF THE HYDROGEL AFTER THE DETERGENT IS ADDED TO THE HYDROGEL. PREFERABLY THE DETERGENT IS A NONIONIC HIGH MOLECULAR WEIGHT DETERGENT COMPOSED ONLY OF CARBON, HYDROGEN, AND OXYGEN.
Abstract:
A METHOD OF PREPARING A SUPPORTED HYDROGENATION METAL CATALYST CONTAINING HIGH METAL CONCENTRATIONS IN A SINGLE IMPREGNATION USING AN AQUEOUS IMPREGNATING SOLUTION CONTAINING HIGH CONCENTRATION OF HYDROGENATION METAL IN SOLUTION AND STABILIZED AGAINST PRECIPITATION BY THE PRESENCE OF PHOSPHORIC ACID AND HYDROGEN PEROXIDE IN THE SOLUTION.
Abstract:
An asphaltenes hydroconversion process for the conversion of asphaltenes to lower boiling hydrocarbons by contacting said asphaltenes with hydrogen in the presence of a pyrolyzed polyacrylonitrile polymer or mixtures thereof.
Abstract:
Composites formed by the impregnation of refractory oxide supports with thermally decomposable salts of catalytically active metals are activated to produce highly active catalysts by heating the composites at a controlled rate to the prescribed calcination temperature while intimately contacting the composites with at least about 1 and preferably at least about 2 s.c.f.m. of injected air per pound of composite having an initial temperature below about 500* F.