Abstract: The invention concerns a device and a method for rotary fluidized bed for catalytic polymerization, drying and other treatments of solid particles or for catalytic transformation of fluids, wherein a cylindrical reactor (1), in which the fluids are injected (7) tangentially to its cylindrical wall, is divided into a succession of cylindrical chambers (Z1, Z2, Z3) by hollow discs (3), which are fixed to its cylindrical wall, which have central openings through which the fluids circulating in rotation inside the cylindrical chambers are sucked (10), which have lateral openings through which said fluids are evacuated through the cylindrical wall of the reactor and which have passages (27) for transferring the suspended solid particles in the rotary fluidized bed from one chamber to the next through said discs (3).

Abstract: A catalyst composition and a process for hydrodealkylating a C9+ aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises an alumina, a metal oxide, a phosphorus oxide and optionally, an acid site modifier selected from the group consisting of silicon oxides, sulfur oxides, boron oxides, magnesium oxides, tin oxides, titanium oxides, zirconium oxides, molybdenum oxides, germanium oxides, indium oxides, lanthanum oxides, cesium oxides, and combinations of any two or more thereof. The process comprises contacting a fluid which comprises a C9+ aromatic compound with the catalyst composition under a condition sufficient to effect the conversion of a C9+ aromatic compound to a C6 to C8 aromatic hydrocarbon.

Abstract: The present invention relates to a method for recovering styrene monomers from polystyrene resins by using sulfate as a catalyst. The present invention makes possible to thermally decompose polystyrene resins at comparatively low temperatures, and to reduce facility costs, etc., and also makes possible to recover oil containing less ratio of low molecular weight components and a high content of styrene monomers from vapors obtained through thermal decomposition of polystyrene.

Abstract: Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions, a method for their preparation and their use as catalysts for the catalytic cracking of hydrocarbon feedstocks. More particularly, the new SAPOs have a high silica:alumina ratio, and are prepared from microemulsions containing surfactants.

Abstract: A process for producing catalyst compositions for converting a cracked gasoline feedstock to a product comprising incremental aromatics and lower olefins. The catalyst compositions produced thereby. A process for converting a cracked gasoline feedstock to a product comprising incremental aromatics and lower olefins.

Abstract: In the method for reclaiming styrene monomer from polystyrene, polystyrene is mixed with a solvent and heated to approximately 300.degree. C. to 400.degree. C. to depolymerize the polystyrene to produce a styrene monomer fraction and a heavier fraction of partial depolymerization products. The styrene fraction is separated from the heavier fraction to recover the styrene monomer and polystyrene partial depolymerization products. In a preferred embodiment, the solvent comprises a "styrene oil" which results from the incomplete depolymerization of polystyrene, at least a portion of which is recycled to mix with polystyrene. The method is useful in reclaiming styrene monomer from napalm, foamed polystyrene, and other polystyrene products. In the case of reclamation of napalm, the method also includes the steps of separating and recovering benzene and gasoline.

Abstract: In the method for reclaiming styrene monomer from polystyrene, polystyrene is mixed with a solvent and heated to approximately 300.degree. C. to 400.degree. C. to depolymerize the polystyrene to produce a styrene monomer fraction and a heavier fraction of partial depolymerization products. The styrene fraction is separated from the heavier fraction to recover the styrene monomer and polystyrene partial depolymerization products. In a preferred embodiment, the solvent comprises a "styrene oil" which results from the incomplete depolymerization of polystyrene, at least a portion of which is recycled to mix with polystyrene. The method is useful in reclaiming styrene monomer from napalm, foamed polystyrene, and other polystyrene products. In the case of reclamation of napalm, the method also includes the steps of separating and recovering benzene and gasoline.

Abstract: A process for converting solid plastic materials, preferably waste materials, into usable lower molecular weight hydrocarbonaceous materials by reacting such plastic materials at elevated temperatures in effective contact with an acidic catalyst comprising at least one zeolite having acid activity.

Abstract: The instant invention relates to a process for converting methyl- and/or ethyl-substituted benzene or naphthalene and butadiene to 4-aryl-1-butene or 4-aryl-1-pentene and propylene by:a) reacting a methyl- and/or ethyl-substituted benzene or naphthalene and 1,3-butadiene in the presence of an alkali metal catalyst,b) reacting the butenylated reaction product of step a) with ethylene in the presence of of a disproportionation catalyst, andc) separating from the reaction product of step b) product 4-aryl-1-butene or 4-aryl-1-pentene and propylene.

Abstract: A method for producing alkylstyrene which is characterized in that 1,2-di(substituted phenyl)ethane is brought into contact with an acid catalyst at 200.degree. C. to 650.degree. C. in the presence of an inert gas to crack it into alkylstyrene and alkylbenzene. The method of the invention has advantages in that the operation of reaction and separation of reaction mixture are quite easy, the lowering of catalytic activity is small, and unreacted starting material can be reused.

Abstract: The instant invention relates to a process for converting toluene and butadiene to styrene and 1-pentene by:(a) reacting touene and 1,3-butadiene in the presence of an alkali metal catalyst,(b) contacting the butenylated reaction product of step (a) with a double bond isomerization catalyst at a temperature sufficient to cause double isomerization,(c) reacting the isomerized product of step (b) with ethylene in the presence of a disproportionation catalyst, and(d) separating from the reaction product of step (c) product styrene and 1-pentene.

Abstract: A method for producing p-alkylstyrene which is characterized in that side reaction scarcely occurs, catalyst and unreacted material are easily recovered for the reuse, the p-position selectivity is excellent and yield of aimed product is high. In the method, monoalkylbenzene having an alkyl group with 3 or more carbon atoms is reacted with acetaldehyde in the presence of hydrogen fluoride catalyst under the conditions of a temperature of 0.degree. C. or lower, a molar ratio of 2 to 100 in "alkylbenzene/acetaldehyde", the other molar ratio of 1.7 to 300 in "hydrogen fluoride/acetaldehyde", the proportion of hydrogen fluoride to the sum of hydrogen fluoride and water in the reaction system of 65% by weight or higher, and the concentration of acetaldehyde in the reaction system of 1.0% by weight or lower to obtain 1,1-bis(p-alkylphenyl)ethane, and then subjecting it to catalytic cracking at a temperature in the range of 200.degree. to 650.degree. C. in the presence of an acid catalyst.

Abstract: A method for producing arylethylene comprising four steps of: (I) bringing 1,1-diarylethane into contact with an acid catalyst in the presence of an inert gas to crack said compound into arylethylenes and alkylbenzenes; (II) separating the reaction mixture obtained in the above cracking step (I) into at least a fraction mainly containing 1,1-diarylethane; (III) bringing said fraction mainly containing 1,1-diarylethane into contact with hydrogen gas in the presence of a hydrogenation catalyst; and (IV) re-cracking hydrogenated fraction obtained in the preceding hydrogenation step (III) by bringing it into said cracking step (I).Particularly, this method is useful for producing p-isobutylstyrene which is a starting material for preparing a valuable medicine of ibuprofen.

Abstract: A method for producing p-isobutylstyrene which is characterized in that starting materials are inexpensive, processes are easy to be done and products are highly pure. The method comprises the step of catalytically cracking 1,1-bis(p-isobutylphenyl)ethane at temperatures in the range of 200.degree. to 650.degree. C. in the presence of a protonic acid catalyst and/or a solid acid catalyst to produce p-isobutylstyrene and isobutylbenzene, and at least a portion of said isobutylbenzene is recycled to produce said 1,1-bis(p-isobutylphenyl)ethane by reaction with acetaldehyde in the presence of sulfuric acid.

Abstract: A method for preparing C.sub.3 -C.sub.4 olefins and vinylaromatic compounds, viz. styrene, vinyltoluenes or vinylxylenes which comprises alkylation of toluene or methyl derivatives thereof with a C.sub.2 -C.sub.3 olefin into the methyl group. The resulting alkylaromatic compounds are subjected to conversion to the desired products in the presence of ethylene on a catalyst consisting of chromium oxide, tungsten oxide and an oxide of an alkali or alkali-earth metal supported by a carrier.The method according to the present invention makes it possible to increase the yield of vinylaromatic compounds, obtain individual isomers of vinyltoluene or vinylxylene and efficiently utilize the part of the alkyl radical of the alkylaromatic compound lost in the prior art method.

Abstract: A process for making styrene by the cracking of beta-phenethyl acetate wherein the beta-phenethyl acetate is derived from the esterification of beta-phenethyl alcohol. The latter is derived from the homologation of benzyl alcohol-benzyl acetate mixtures. The esterification of the beta-phenethyl alcohol may be partial because it has been found that up to 20% by weight of beta-phenethyl alcohol may be fed to the cracking step and also converted to styrene. Benzyl alcohol and benzyl acetate can also be fed to the cracking step because it has been found that they are essentially inert at cracking conditions.