Abstract: An amorphous powder useful as a precursor for the preparation of crystalline aluminosilicates is prepared by forming a sodium aluminum silicate water mixture whose composition falls within specified ranges for forming sodium zeolite A. By dehydrating the mixture with a water miscible solvent prior to aging and crystal formation, an amorphous powder is recovered for future use. Upon subsequent treatment the amorphous powder can be converted to crystalline aluminosilicates including type 3A, 4A, 5A, X and Y.

Abstract: Low concentrations of Group VIB metal salts of fatty acids will catalyze the hydroconversion of sulfur-containing heavy petroleum oils producing a lighter oil fraction having a lower sulfur concentration than the heavy oil and a tar fraction containing a higher sulfur concentration than the heavy oil. Catalyst concentrations of 300 to 1,000 ppm, calculated as the elemental metal, are used. Molybdenum octoate is a preferred catalyst. This is a continuation, of application Ser. No. 400,866, filed Sept. 26, 1973, and now abandoned.

Abstract: Acetone containing less than 0.2 weight percent water is produced in an extractive distillation of acetone containing appreciable quantities of water by utilizing isopropyl alcohol as the extracting agent.

Abstract: The useful process life of aqueous urea solutions used in mineral oil urea dewaxing processes may be significantly prolonged by contacting with an acidic ion exchange resin at least a portion of the urea solution recovered from n-paraffin-urea adduct decomposition. The useful life of these aqueous urea solutions is further enhanced by contacting the urea solution with activated carbon in addition to the ion exchange resin.

Abstract: In a mineral dewaxing process, the oil solvent and the wax-containing mineral oil feed are dehydrated by a combination of flash evaporation, steam stripping and azeotropic distillation.

Abstract: In a fluid catalytic cracking unit utilizing a zeolite cracking catalyst and employing a multiplicity of elongated reaction zones or risers, significant improvements are obtained by introducing a light gas oil to at least one elongated reaction zone and a heavier gas oil to at least one other elongated reaction zone. Optionally, the vaporous effluent from either or both elongated reaction zones may be subjected to further cracking in the dense phase of catalyst in the reactor vessel. Operating conditions within the elongated reaction zones are established to permit the conversion of the heavier gas oil to be 0-30 volume percent lower than the light gas oil. Higher yields of higher octane gasoline are obtained where the unit is operated in the disclosed manner.

Abstract: Imide - ester derivatives of ethene - maleic anhydride copolymers are prepared in a two step reaction. These derivatives are useful as adhesives and protective coatings.

Abstract: Aromatic compounds can be separated from slack wax in a continuous cyclic process using a macroporous metal ion loaded cation exchange resin involving successive steps of adsorption, purge, desorption and purge.

Abstract: Dilute aqueous urea solutions, contaminated with oil-solvent solution and obtained as filtrate or centrifugate in a urea dewaxing process of the type where a concentrated aqueous solution of urea is employed to form the wax-urea adduct, are purified by admixing the contaminated dilute aqueous urea solution with 1-25, preferably 2-5 volumes of solvent per volume of oil-solvent solution contamination, filtering the mixture, settling the mixture into two liquid phases, a substantially uncontaminated aqueous urea solution and an oil-solvent solution, and separating the two phases.

Abstract: Mineral oils containing small amounts (less than 2 weight percent) of normal paraffins may be urea dewaxed to produce refrigerator oils having Freon cloud or flock points of at least minus 55.degree.C. by utilizing large excesses of the amount of crystalline urea theoretically required for complete conversion of the n-paraffins into solid adduct and conducting the adduct formation under conditions of vigorous agitation.