Abstract: A hindered phenolic antioxidant stablizer for polyolefins is rendered extraction resistant by complexing it with an agent containing complexing groups derived from N-vinyl-2-pyrrolidone or a N-dialkyl substituted amino alkyl ester of an .alpha.,.beta.-unsaturated carboxylic acid.

Abstract: A two-step process for the waste treatment of fluoroborate solutions which involves hydrolysis at an acidic pH in the presence of calcium ions toliberate fluoride and subsequent removal of fluoride values, e.g. by precipitation as calcium fluoride under alkaline conditions.

Abstract: A process is disclosed for the removal of colorants from industrial dye waste solutions which involves the treatment of the waste with a solution of a Group IA or IIA metal halide or sulfate to precipitate the colorant, which subsequently is removed by common solid separation techniques as a dense material of relatively high solids content. The process is particularly suitable for integration into a dyeing process to increase color fastness of the dyed article.

Abstract: A highly concentrated municipal waste sludge is recovered in a process which involves adding alum and a flocculating agent under alkaline conditions to a dilute waste sludge, adding calcium oxide or hydroxide and filtering the resultant mixture under pressure.

Abstract: A two-step process for the waste treatment of fluoroborate solutions which involves hydrolysis at an acidic pH in the presence of calcium ions to liberate fluoride and subsequent removal of fluoride values, e.g. by precipitation as calcium fluoride under alkaline conditions.

Abstract: A propylene polymer composition having excellent affinity towards basic dyestuffs is produced by blending a propylene polymer with an alternating copolymer of an alkyl vinyl ether and maleic anhydride, the alkyl group of the alkyl vinyl ether containing at least 8 carbon atoms.

Abstract: A control system for a liquid-solid contacting apparatus and method therefor is designed to greatly minimize the dilution and contamination of the product streams as well as to perform the desired separation, concentration or conversion reactions at peak efficiency.The liquid-solid contactor comprises a loop; a plurality of loop valves dividing the loop into loading, pulse and regenerating sections; feed means for supplying a feed containing sorbable material to the loading section; sorption solid substantially filling the loop; regenerating means for supplying regenerating fluid to the regenerating section; first removal means for removing the material desorbed by the regenerating fluid from the loop; second removal means for removing the processed liquid from the loop; pulse inlet means for supplying a pulse liquid to the pulse section and an outlet means for removing a portion of the pulse liquid from the loop.

Abstract: ABS compositions of improved impact strength are obtained by adding thereto controlled amounts of a synthetic hydrocarbon resin having a ring and ball softening point of at least 70.degree.C and derived from deeply cracked petroleum stocks.

Abstract: An aqueous acid nickel electroplating bath containing as a brightener-leveling agent the reaction product of an acetylenic diester of a halogenated saturated aliphatic acid with a heterocyclic compound containing a tertiary nitrogen atom. The brightener may have the general formula ##EQU1## wherein R.sub.1 and R.sub.2 are hydrogen, halogen or a hydroxy, carboxy, carboxyester, sulphoxy, alkyl, amino or amido group;R.sub.3 is a hydrogen or an alkyl group;R.sub.4 and R.sub.5 are hydrogen or an alkyl group;X is halogen andN is an integer from 0 to 2.

Abstract: An improved process for preparing highly concentrated salt solutions of metals of high purity from waste metal sludges at superior dissolution rates is achieved by preparing, concentrating and washing the sludge containing insoluble metal hydroxide under specific conditions to safeguard against the solids being exposed to air or dried out. The wet sludge is then dissolved in a dilute acid. The resultant solution can be used directly e.g. as make up in many electrolytic metal finishing processes to compensate for drag out losses occurred, or as the primary metal source in electrolytic processes employing insoluble anodes. Other specific uses for the process include the preparation of aluminum sulfate coagulants.

Abstract: Evolution of NOx fumes during dissolution of metal values in mineral acid solutions of nitric acid can be eliminated by the addition of small quantities of hydrogen peroxide to the acid solution.

Abstract: Novel polypropylene compositions comprising blends of 85-97wt percent block copolymers of propylene and ethylene with 3-15wt percent linear polyethylene and a process therefor. The compositions exhibit improved impact and low temperature brittleness properties.

Abstract: An improved copper chromite catalyst having high density, low monovalent ion content, high activity and resistance to poisoning is prepared by reacting a soluble copper salt with chromic acid or a dichromate in solution in the presence of ammonia and urea to precipitate a copper-chromium-nitrogen complex, washing, drying and calcining the precipitate.