Abstract: A 3,3?,4,4?-tetraalkyl cyclohexylbenzene represented by the general formula (1): in which R represents an alkyl group having 1 to 4 carbon atoms, which may be easily converted into a 3,3?,4,4?-biphenyltetracarboxylic acid and a 3,3?,4,4?-biphenyltetracarboxylic dianhydride thereof, which are starting materials for a polyimide, via a 3,3?,4,4?-tetraalkylbiphenyl; and a method for producing the same.

Abstract: 3,4-Dicarboalkoxybiphenyl-3?,4?-dicarboxylic acid represented by the general formula (1): in which R11 and R12 each represents an alkyl group having 1 to 4 carbon atoms, and n represents the number of waters of hydration that is 0 or 1, and the corresponding anhydride.

Abstract: 3,4-Dicarboalkoxybiphenyl-3?,4?-dicarboxylic acid represented by the general formula (1): in which R11 and R12 each represents an alkyl group having 1 to 4 carbon atoms, and n represents the number of waters of hydration that is 0 or 1, and the corresponding anhydride.

Abstract: The present invention relates to the 3,4-Dicarboalkoxybiphenyl-3?,4?-dicarboxylic acid (including the corresponding acid anhydride) represented by the general formula (1): wherein R11 and R12 each represents an alkyl group having 1 to 4 carbon atoms, and n represents the number of waters of hydration that is 0 or 1.

Abstract: A catalyst for alkylation contains an inorganic structural material having an ion-exchange ability and a metal ion having a valency of 2 or more. The metal ion is supported on the inorganic structural material. The inorganic structural material is preferably a zeolite. The metal ion is preferably a lanthanide metal. The catalyst for alkylation imparts industrially satisfiable activity and selectivity and can be readily separated, collected and recycled. Furthermore, the process for producing an alkylaromatic hydrocarbon compound includes reacting an aromatic hydrocarbon compound and a compound having an unsaturated bond in the presence of the catalyst for alkylation.

Abstract: The present invention relates to a 3,3?,4,4?-tetraalkyl cyclohexylbenzene represented by the general formula (1): wherein R represents an alkyl group having 1 to 4 carbon atoms, which may be easily converted into a 3,3?,4,4?-biphenyltetracarboxylic acid and a 3,3?,4,4?-biphenyltetracarboxylic dianhydride thereof, which are a starting material for a polyimide, via a 3,3?,4,4?-tetraalkylbiphenyl; and a method for producing the same.

Abstract: The present invention relates to the 3,4-Dicarboalkoxybiphenyl-3?,4?-dicarboxylic acid (including the corresponding acid anhydride) represented by the general formula (1): wherein R11 and R12 each represents an alkyl group having 1 to 4 carbon atoms, and n represents the number of waters of hydration that is 0 or 1.

Abstract: A catalyst for alkylation contains an inorganic structural material having an ion-exchange ability and a metal ion having a valency of 2 or more. The metal ion is supported on the inorganic structural material. The inorganic structural material is preferably a zeolite. The metal ion is preferably a lanthanide metal. The catalyst for alkylation imparts industrially satisfiable activity and selectivity and can be readily separated, collected and recycled. Furthermore, the process for producing an alkylaromatic hydrocarbon compound includes reacting an aromatic hydrocarbon compound and a compound having an unsaturated bond in the presence of the catalyst for alkylation.