Abstract: An oxychlorination catalyst is described which is constituted by porous particles of microspheroidal, or at least microcrystalline, alumina impregnated with cupric chloride and with the chloride of an alkali or alkaline-earth metal, in which the copper and the alklai or alkaline-earth metal are uniformly distributed over the entire surface area of the particles. The method for the preparation of the catalyst is also described. The catalyst enables oxychlorination of ethylene to dichloroethane to be achieved with improved fluodynamic behavior of the fluidized catalytic bed and with improved conversions and selectivity towards the useful reaction product.

Abstract: Regeneration of an ammoxidation catalyst which is exhausted as a result of prolonged exposure to ammoxidation conditions, containing oxides of Mo, Bi, P, Fe, Co, Ni and possibly an alkali metal, particularly K, on a granular support, particularly silica, by means of a method including:the impregnation of the granules of spent catalyst with an aqueous molybdic acid solution, or with an aqueous solution of partially or totally salified molybdic acid in the form of the ammonium salt, with a volume of impregnation solution less than the total pore volume of the catalyst subjected to regeneration;the drying of the impregnated granules at a temperature of from 100.degree. to 200.degree. C.;the calcining of the dried granules at a temperature of from 250.degree. to 450.degree. C., solely when the impregnation is with an aqueous solution of partially or totally salified molybdic acid.

Abstract: Method of preparing a supported Ziegler-catalyst active in the polymerization of alpha-olefins to polymers particularly suited to working by blow-moulding, by reacting:(A) an organometallic compound of aluminium, and(B) the product of the reaction of titanium and vanadium halides with a solid support obtained by the spray drying of magnesium chloride in a mixed solution of ethanol and methanol, the support containing both ethanolic and methanolic alcoholic hydroxyl groups.

Abstract: Method for the copolymerization of ethylene with C.sub.4 -C.sub.8 alpha-olefins by means of a suspension method in an organic liquid, at a temperature of from 50.degree. C. to 70.degree. C.

Abstract: A process for the preparation of a catalyst which is highly active in the polymerization of gaseous ethylene is described the process comprising the steps of spray drying an ethanolic solution of MgCl.sub.2 to obtain MgCl.sub.2 particles of from 3 to 100 microns in size and with a residual alcoholic OH-groups content of from 1.5% to 20% by wt., the MgCl.sub.2 in said particles having an X-ray spectrum with a maximum peak at 10.8 angstrom, reacting said particles with a titanium halide in liquid or vapor phase and mixing the obtained reaction product with an alkylaluminium or an alkylaluminium halide in such amount to obtain an atomic ratio Al:Ti of from 100:1 to 5,000:1.

Abstract: Recovery of molybdenum from a solid mixture, such as an exhausted catalyst, containing molybdenum in the oxide form or in the form of molybdic ions and other metallic compounds.The mixture is contacted with an aqueous alkali metal hydroxide to solubilize molybdenum in the form of an alkali metal molybdate, and after filtration the aqueous solution of alkali metal molybdate thus obtained is contacted with a strong cationic exchange resin to convert said molybdate into molybdic acid.

Abstract: Ziegler catalytic system formed of an organometallic compound of a metal of Group I, II or III of the Periodic System in combination with a transition metal compound supported on a carrier.The carrier is prepared by reacting magnesium chloride with an aliphatic alcohol and a fluorine-containing compound at 100.degree.-200.degree. C. to obtain an active complex comprising 2-15 wt. % of fluorine and 0.4-11 wt. % of alcoholic hydroxyl groups.The catalytic system may be used for the polymerization of alpha-olefins.

Abstract: Phenol pitch obtained as a bottoms fraction in the distillation of phenol deriving from the acid hydrolysis of cumene hydroperoxide is treated to recover therefrom desired products consisting of phenol, alpha-methylstyrene, cumene and acetone, by introducing steam and the phenol pitch, into a reactor in a weight ratio of from 0.01:1 to 1:1, withdrawing from the top of said reactor a vapor phase comprising said desired products, withdrawing from the bottom of said reactor a liquid phase consisting essentially of compounds of higher boiling point than said desired products, and operating at a pressure of 4-12 Kg/cm.sup.2, at a temperature of 320.degree.-400.degree. C., as measured in the liquid phase, and with a residence time of 0.5-10 hours.

Abstract: Preparation of a catalyst based on molybdenum and iron oxides by precipitation from a soluble molybdenum compound and a soluble ferric salt, with separation of the precipitate from its mother waters and washing with deionized water.Molybdic ions are recovered from the mother waters and washing waters by contacting the latter with a salified anionic exchange resin, which is then contacted with aqueous alkali metal hydroxide to yield an aqueous solution of alkali metal molybdate.The molybdenum thus recovered may be recycled to the precipitation step upon conversion of the molybdate into molybdic acid by treatment with a strong cationic exchange resin, and possible conversion of the acid into ammonium paramolybdate.

Abstract: An oxychlorination catalyst active in the production of dichloroethane from ethylene, hydrogen chloride and oxygen, consisting of copper chloride on a granular support consisting of alumina in the crystallographic form eta, having a total volume of pores of from 0.3 to 0.5 ml/g and a surface area of from 250 to 400 m.sup.2 /g with at least 90% of said volume attributable to pores with a radius of less than 40 A and at least 90% of said surface area attributable to pores with a radius of less than 30 A.

Abstract: 0-cresol and 2,6-xylenol are prepared by flowing a gaseous stream of methanol and phenol in a molar ratio of phenol to methanol of from 1:1 to 1:9 through a fluidized bed of alumina particles at a temperature of from 200.degree. to 400.degree. C., said alumina being in the eta, gamma or chi crystallographic form, having a surface area of from 100 to 500 m.sup.2 /g and an overall pore volume of from 0.3 to 0.6 ml/g and having been pre-treated with a stream of air or inert gas at a temperature of the order of 500.degree. C. for at least 2 hours.

Abstract: Ziegler catalytic system for the polymerization of olefins, formed by the combination of an organo-metallic compound and a compound of a heavy metal supported on a carrier.The carrier is an active complex obtained by reacting one or more alloys of metals chosen from Mg, Fe, Al, Ni, Cr and Zn, gaseous hydrogen chloride and one or more alcohols in the liquid or gaseous state, at a temperature of from 60.degree. to 300.degree. C., the said active complex having a content of free alcoholic hydroxyl groups of from 1 to 20% by weight, a chlorine content of from 15 to 70% by weight, a metal content of from 5 to 35% by weight, a porosity of from 0.1 to 1 cc/g and a surface area of from 1 to 200 m.sup.2 /g.

Abstract: A Ziegler catalytic system comprising an organometallic compound of a metal of Groups I to III of the Periodic Table and a compound of a heavy metal of Groups IV to VI supported on a carrier, the latter being an activated amorphous alumina or alumino-silicate containing from 0.3 to 30% by weight of salts of metals of Groups IIb, IIIa, VIb and VIII with oxygenated inorganic anions, or of a mixture of the latter with salts of said metals of Groups IIb, IIIa, VIb and VIII with non-oxygenated inorganic anions, said salts being introduced into the carrier by contacting the latter with one or more solutions of said salts and the carrier being then activated by calcination at 250.degree.-700.degree. C.

Abstract: Process for the production of 2,2-(4,4'-dihydroxydiphenyl) propane comprising reacting phenol with acetone in a molar ratio of at least 2:1 but not exceeding 10:1 in the presence of an acidic agent at a temperature not exceeding 80.degree. C. to substantially complete reaction of the acetone, separating the acidic agent from the reaction product, bringing the product freed from acidic agent into contact with a material chosen from between activated carbon and active earths at a temperature in the range of from about 60.degree. to 120.degree. C. for a time in the range of from about 1 to 120 minutes and distilling the product obtained in the treatment with the active material to recover the 2,2-(4,4'-dihydroxydiphenyl-propane.

Abstract: Ziegler catalytic system comprising an organo-metallic compound of a metal of Groups I to III of the Periodic System and a compound of a heavy metal of Groups IV to VI supported on an alumina carrier, the latter being an activated amorphous alumina containing from 0.3 to 30% by weight of salts of aluminum with oxygenated inorganic anions, or of a mixture of the latter with salts of aluminum with non-oxygenated inorganic anions, said carrier being prepared by precipitating an alumina gel at a pH value of 7-10, introducing the inorganic anions into said gel, drying said gel and calcining the resulting amorphous alumina at 250.degree.-700.degree. C.

Abstract: Ziegler catalytic system comprising an organo-metallic compound of a metal of Groups I to III of the Periodic Table and a compound of a heavy metal of Groups IV to VI supported on a carrier, the latter being an activated amorphous alumina or alumino-silicate containing from 0.3 to 30% by weight of salts of aluminum with oxygenated inorganic anions, or of a mixture of the latter with salts of aluminum with non-oxygenated inorganic anions, said inorganic anions being introduced into the amorphous alumina or alumino-silicate by contacting the latter with one or more acid solutions of the inorganic anions and the carrier being then activated by calcination at 250.degree. - 700.degree. C.

Abstract: A process for the production of 2,2-(4,4'-dihydroxydiphenyl)propane (bisphenol A) of high purity of condensation of phenol with acetone in the presence of strong acids, which comprisesPreparing an addition product of bisphenol A and phenol andSeparating the constituents of this addition product by fractional condensation of the vapours obtained by treating the addition product at high temperature and at reduced pressure for a short time.