Abstract: A catalyst for the production of an oxygen-containing compound, comprising palladium, tungsten and zirconium, a production process thereof, and a production process of an oxygen-containing compound using the catalyst. The catalyst can provide an oxygen-containing compound from a lower olefin and oxygen with high productivity and high selectivity.

Abstract: A catalyst for the production of an oxygen-containing compound, comprising palladium, tungsten and zirconium, a production process thereof, and a production process of an oxygen-containing compound using the catalyst. The catalyst can provide an oxygen-containing compound from a lower olefin and oxygen with high productivity and high selectivity.

Abstract: There is provided a process for producing an aromatic compound by Friedel-Crafts reaction product, which comprises reacting an aromatic compound with an ester compound in the presence of a heteropolyacid-containing solid acid catalyst.

Abstract: There is provided a process for producing an aromatic compound by Friedel-Crafts reaction product, which comprises reacting an aromatic compound with an ester compound in the presence of a heteropolyacid-containing solid acid catalyst.

Abstract: A chlorinated vinyl chloride resin composition comprising 100 parts by weight of chlorinated vinyl chloride resin and a hydroxypolycarboxylic acid salt, e.g., sodium tartrate, and/or 0.2 to 1.5 parts by weight of zeolite. The composition exhibits improved thermal stability and is particularly suited to pipe extrusion.

Abstract: The method for producing diarylmethane and its derivatives by condensation of an aromatic hydrocarbon and a methylenating agent is proposed, in which the aromatic hydrocarbon having at least one hydrogen atom that is directly connected to its benzene ring and a methylenating agent such as formalin are reacted in a specific temperature range in the presence of a heteropoly-acid of the condensation product of at least one oxide selected from the group of Mo, W, Nb and V with an oxyacid of P, Si, As or Ge.

Abstract: There is obtained a chlorinated vinyl chloride resin composition from which a siding molded article having good appearance and excellent heat resistance, impact resistance and weatherability is obtained. A chlorinated vinyl chloride resin composition for siding extrusion molding is obtained and a siding molded article is prepared therefrom, said chlorinated vinyl chloride resin composition comprising 100 parts by weight of a chlorinated vinyl chloride resin and 3 to 20 parts by weight of an acrylic graft rubber copolymer, wherein the acrylic graft rubber copolymer contains 30 to 90% by weight of acrylic hollow rubber particles whose average void ratio is 3 to 90% by volume in a latex state.

Abstract: A chlorinated vinyl chloride resin composition comprising 100 parts by weight of chlorinated vinyl chloride resin and a hydroxypolycarboxylic acid salt, e.g., sodium tartrate, and/or 0.2 to 1.5 parts by weight of zeolite. The composition exhibits improved thermal stability and is particularly suited to pipe extrusion.

Abstract: There is obtained a chlorinated vinyl chloride resin composition from which a siding molded article having good appearance and excellent heat resistance, impact resistance and weatherability is obtained. A chlorinated vinyl chloride resin composition for siding extrusion molding is obtained and a siding molded article is prepared therefrom, said chlorinated vinyl chloride resin composition comprising 100 parts by weight of a chlorinated vinyl chloride resin and 3 to 20 parts by weight of an acrylic graft rubber copolymer, wherein the acrylic graft rubber copolymer has a glass transition temperature of at most 0° C. and contains 30 to 90% by weight of acrylic hollow rubber particles whose average void ratio is 3 to 90% by volume in a latex state.

Abstract: A chlorinated vinyl chloride resin composition containing a chlorinated vinyl chloride resin which has a polymerization degree of from 600 to 1500 prior to chlorination and a chlorination degree of from 62 to 70 wt. %, an impact modifier, a stabilizer, a lubricant and titanium dioxide, wherein the content of zinc in titanium dioxide is 0.1% or less, which has improved thermal stability.

Abstract: A chlorinated vinyl chloride resin composition containing a chlorinated vinyl chloride resin which has a polymerization degree of from 600 to 1500 prior to chlorination arid a chlorination degree of from 62 to 70 wt. %, an impact modifier, a stabilizer, a lubricant and titanium dioxide, wherein the content of zinc in titanium dioxide is 0.1% or less, which has improved thermal stability.

Abstract: A chlorinated vinyl chloride resin composition, which is suitably used for the production of extruded pipes, containing a chlorinated vinyl chloride resin which has a polymerization degree of from 600 to 1500 prior to chlorination and a chlorination degree of from 62 to 70 wt. %, methyl methacrylate-butadiene-styrene copolymer particles having a butadiene content of less than 60 wt. % and a styrene content of larger than 30 wt. % in the whole particles, and a chlorinated polyethylene having a chlorine content of from 10 to 50 wt. %, in which the methyl methacrylate-butadiene-styrene copolymer particles have an average dispersed particle size of 2,000 angstroms or less in an extruded pipe produced from the composition.

Abstract: A solid acid catalyst for paraffin conversion which consists of an acid salt of a heteropoly acid being represented by the following general formula:A.sub.x H.sub.(3-x) PY.sub.12 O.sub.40wherein A represents one ion selected from the group consisting of alkali metal ion and ammonium ion; Y represents at least one atom selected from the group consisting of W and Mo; x represents a number of 2.2 to 2.8, and a metal Group VIII, wherein the acid salt of heteroply acid has been impregnated in the metal of Group VIII, and paraffin conversion process using the same.