Abstract: The bulk polymerization of monomers which produce polymer insoluble in the monomers, in which the polymerization is carried out in an autoclave mounted on a horizontal axis and provided with stirring means formed of at least two half-frames arranged symmetrically of the axis of the autoclave and fixed at each end to a rotatable stub shaft axially mounted in the autoclave, each half-frame having a peripheral member serving as a blade which, on rotation of the half-frames, passes in close proximity to the interior surface of the autoclave, and bracing means interconnecting the peripheral members of the half-frames.

Abstract: A vertical autoclave suitable for the bulk polymerization of vinyl chloride based polymers and copolymers embodying agitation means comprising at least one agitator (A) in the form of helicoidal ribbon about a rotatable shaft in the upper portion of the autoclave and an agitator (B) having a rotatable shaft passing through the bottom portion of the autoclave with at least one arm located adjacent to and having a profile corresponding to the bottom of the autoclave, and means for independently driving the agitators (A) and/or (B).

Abstract: A vertical autoclave suitable for the bulk polymerization of vinyl chloride based polymers and copolymers embodying agitation means comprising at least one agitator (A) in the form of helicoidal ribbon about a rotatable shaft in the upper portion of the autoclave and an agitator (B) having a rotatable shaft passing through the bottom portion of the autoclave with at least one arm located adjacent to and having a profile corresponding to the bottom of the autoclave, and means for independently driving the agitators (A) and/or (B).

Abstract: The invention concerns catalysts for treating residual gases, containing hydrogen and carbon derivatives of sulphur, by the Claus reaction. These catalysts have a specific area of at least 80 m.sup.2 /g and essentially comprise active alumina and a titanium compound. They enable carbon compounds of sulphur to be destroyed and the Claus reaction proper to be obtained with good yields.

Abstract: The invention is addressed to very light alumina-based agglomerated bodies, the porosity of which comprises pores of large dimensions. These bodies are produced from alumina gels which are dehydrated in hot gas streams so that the amount of water remaining, which can be measured by calcination at high temperature, is from 8 t0 35% of the weight of the treated gels; the treated gels to which other components can be added are agglomerated by any known means. These bodies can be used in particular in adsorption, catalysis, and chromatography.

Abstract: A method for the partial or total separation by extractive distillation of C.sub.1 to C.sub.3 clorinated aliphatic hydrocarbons from mixtures of at least two such chlorinated hydrocarbons. The mixture of the chlorinated hydrocarbons is distilled in the presence of one or more other organic compounds having a boiling temperature higher than the substances to be separated, and selected from the group comprising saturated polyols, ethylene carbonate, propylene carbonate, dimethyl formamide, furfural, N-methylpyrrolidone, cyclohexanone, dimethylsulfoxide and, preferably, sulfolane and alkylsulfolanes in which the alkyl group is C.sub.1 or C.sub.2 ; use of this method for the separation of mixtures containing or essentially consisting of trichlorethylene and 1,2-dichloroethane.

Abstract: A method for preparing phthalic anhydride by oxidation of o-xylene with air in which the reaction is self-sufficient in terms of energy and involves only low investment costs while providing a pure product in high yield in which the oxidation reaction is carried out in short tubes for minimum pressure drop over the reactor.

Abstract: A reaction mass for use in the preparation of chlorine and ammonia by contact with ammonium chloride, in which the reaction mass contains iron oxide which is capable of chemically combining with chlorine in the reaction with ammonium chloride and an alkali metal chloride, with the ratio of iron oxide and alkali metal chloride being such that the ratio of the chlorine chemically combined with the iron to the chlorine chemically combined with the alkali metal is less than 1.

Abstract: Process of preparing anionic polyurethane latexes without the addition of a foreign emulsifying surface active agent comprising rendering the basic polyester or polyether constituent of the latex intrinsically emulsifiable or dispersible in water by incorporating an anionic functional group in the chain thereof and reacting this basic constituent with a diisocyanate in order to obtain a prepolymer which is then emulsified in water.The latexes obtained are advantageously applied in coating and impregnation processes, finishing of leather, and as binders for nonwoven fabrics.

Abstract: Polymers and copolymers of vinyl chloride having a narrow grain size distribution and a large average mean diameter and a process for the preparation of same in which the polymerization of vinyl chloride is carried out in the presence of a prepolymer composition obtained by polymerization, under high turbulence, of a monomeric composition containing vinyl chloride and acrylic acid or methacrylic acid, an aliphatic ester thereof or a diester of a dihydric alcohol.

Abstract: Substituted amines are prepared with high selectivity by reacting olefin, hydrogen, CO and secondary amine in the presence of a coordination complex catalyst of a Group VIII metal and a ligand, the donor atom of which is oxygen, nitrogen or sulfur.

Abstract: Graft polymers based upon butadiene, alkyl acrylate, methyl methacrylate and styrene, for the improvement of the impact strength of homo- or co-polymers of vinyl chloride. Use is made of a backbone polymer formed of a butadiene-alkyl acrylate copolymer which is agglomerated and grafted with methyl methacrylate, styrene and possibly a cross-linking monomer. The composition, mixtures of homo- or co-polymers of vinyl chloride and graft polymers are usable for the manufacture of plates, bottles, wrapping sheets and bottles for packaging liquids.

Abstract: An improved process for the production of 1,2-dichloroethane in which chlorine and ethylene are reacted in the liquid phase in the absence of light and in the presence of a Lewis acid catalyst wherein all of the chlorine used in the reaction and a fraction of the total ethylene within the range of 90 to 100 mole percent based upon the total chlorine are introduced to a first homogeneous agitated reaction zone, the products from the first zone are passed to a second homogeneous agitated reaction zone into which there is also introduced the remaining ethylene in countercurrent flow to the flow of the 1,2-dichloroethane, with the total amount of ethylene introduced not exceeding 102 mole percent of the total chlorine.

Abstract: A trimethylolpropane ester composition useful as lubricant base for motor-car engines is prepared by total esterification of trimethylolpropane by means of a mixture of saturated aliphatic carboxylic acids comprising 6-33% by mole of dicarboxylic acids having 4-19 carbon atoms and 94-67 % by mole of monocarboxylic acids whereof 5-90% consists of sparingly branched acids comprising 15-30 carbon atoms and 95-10% of straight chain acids comprising 2-30 carbon atoms.

Abstract: The invention is addressed to the manufacture of chlorinated hydrocarbons by catalytic oxychlorination, in which the chlorine is derived, at least in part, from ammonium chloride, and in which a suitable catalyst comprises a support formed of silica and magnesium with a catalytic active portion formed of copper chloride and an alkali metal chloride. Such catalysts give good yields, little combustion of hydrocarbons and low impurities.

Abstract: Adducts of trichloromethane phosphonic dichloride and olefinically unsaturated compounds having the general formula ##STR1## WHEREIN Q designates: A. (C R"R'"--C R R').sub.nwherein R and R', which may be the same or different, each designatesH, alkyl or flourine;R" designates H, alkyl, aryl, substituted aryl, fluorine, chlorine, bromine, cyano, carbalkoxy, carboxy, acyloxy-methylene, acyloxy propylene, acetoxy, alkoxy, sulfonyl-alkyl or sulfonyl-aryl and R'" designates H, alkyl, fluorine, chlorine or bromine, or R and R" form together a ring system, and n is an integer of from 1 to about 500;B. (CH.sub.2 CR.sup.IV .dbd. CR.sup.V CH.sub.2).sub.mwherein R.sup.IV and R.sup.V, which may be the same or different, each designates hydrogen, methyl or chlorine, and m is an integer of from 1 to about 200.

Abstract: Adducts of trichloromethane phosphonic dichloride and olefinically unsaturated compounds having the general ##STR1## WHEREIN Q designates: A. (C R"R'" -- C R R').sub.nwherein R and R', which may be the same or different, each designatesH, alkyl or flourine;R" designates H, alkyl, aryl, substituted aryl, fluorine, chlorine, bromine, cyano, carbalkoxy, carboxy, acyloxy-methylene, acyloxy propylene, acetoxy, alkoxy, sulfonyl-alkyl or sulfonyl-aryl and R'" designates H, alkyl, fluorine, chlorine or bromine, or R and R" form together a ring system, and n is an integer of from 1 to about 500;B. (CH.sub.2 CR.sup.IV .dbd. CR.sup.V CH.sub.2).sub.mwherein R.sup.IV and R.sup.V, which may be the same or different, each designates hydrogen, methyl or chlorine, and m is an integer of from 1 to about 200.

Abstract: Aromatic amino silanes having 1, 2 and 3 hydrolyzable groups and polymers thereof in which corresponding nitrophenols are hydrogenated in the presence of a catalyst at a temperature below 30.degree. C in which compounds having 2 to 3 hydrolyzable groups produce polymers suitable for use in the preparation of silica and alumina grafts and the compounds having one hydrolyzable group are suitable for use as colorants and the synthesis of polymers.

Abstract: An improved electrode for an electrolysis cell, and the process for producing the same, are provided whereby there is deposited on a film-forming or barrier metal substrate, a compound of perovskite structure whereby the compound of perovskite structure is suspended in a solution of a cobalt salt which, by thermolysis, is converted to a cobalt oxide, and finally subjecting the resulting composite to a heating treatment.

Abstract: The invention concerns catalytic substances for the oxidation of ammonia, for the production of nitric acid, comprising cobalt oxide as the main component. Such substances, besides cobalt oxide, also contain additives formed of aluminum oxide and possibly oxides of thorium, cerium, zinc and cadmium, the amount of aluminum oxide added being from 5% to 15% by weight of the finished substances and the amount of the other oxides being from 0 to 25% by weight of the finished substances; these substances are in particular shaped by pelleting or extrusion, dried and then calcined at temperatures of the order of from 900.degree. to 1000.degree. C. The advantages of these catalytic substances lie in a high degree of activity and a high level of strength, which are maintained during use thereof.