Abstract: The present invention provides a pressure sensitive copy material using an electron accepting developer and an electron donating coupler which develops a color by contacting with the developer, the pressure sensitive copy material being characterized by employing phenyl-sec-butylphenyl-methane as a solvent for the electron donating coupler.

Abstract: A compounding oil for polymers which can be used as a plasticizer, process oil, thinner, softening agent, extender or the like. The compounding oil of the invention comprises a fraction mainly containing triaryldialkanes and having boiling points in the range of 350.degree. to 450.degree. C., which fraction is prepared by disproportionating a by-product oil fraction at temperatures in the range of 20.degree. to 500.degree. C. in the presence of a disproportionation catalyst, said by-product oil fraction mainly containing diarylalkanes, having boiling points in the range of 260.degree. to 320.degree. C., and being obtained from the process to prepare alkylated monocyclic aromatic hydrocarbons by alkylating monocyclic aromatic hydrocarbons with olefins in the presence of an alkylation catalyst.

Abstract: A pressure-sensitive recording material of the type which is prepared by using an electron donating dye-precursor that produces a color when the dye-precursor is brought into contact with an electron accepting color developer. The pressure-sensitive recording material is characterized in that the solvent for said dye-precursor comprises an alkylated fraction which is prepared by alkylating a by-product fraction with at least one alkyl group having 1 to 5 carbon atoms, the by-product fraction containing the components within the boiling range of 255.degree. to 300.degree. C. on the atmospheric pressure basis and being obtained in the process for producing ethylbenzene or ethyltoluene from ethylene and benzene or toluene. The pressure-sensitive recording material of the invention has scarcely offensive odor and can develop a dense color with a higher color developing rate.

Abstract: A solvent for the dye of pressure-sensitive recording paper which solvent has no offensive odor and both the color developing rate and the density of developed color are excellent. The solvent is characterized in that it comprises a fraction having boiling points in the range of 270.degree. to 350.degree. C. which is prepared by distilling the heavier products obtained from the process for producing ethyltoluene by alkylating toluene with ethylene in the presence of synthetic zeolite catalyst.

Abstract: An improved electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil can be produced inexpensively but has excellent electrical characteristics and it comprises a fraction having boiling points in the range of 350.degree. to 450.degree. C. that is prepared by disproportionating diarylalkane or a hydrocarbon mixture mainly containing the same at temperatures in the range of 20.degree. to 500.degree. C. in the presence of a disproportionation catalyst, said diarylalkane having boiling points in the range of 260.degree. to 320.degree. C.

Abstract: A pressure-sensitive recording material which is excellent in several properties and prepared at a low cost. The pressure-sensitive recording material of the invention is applied with pressure-rupturable microcapsules containing a solution of dyestuff in a solvent fraction having a boiling range of 265.degree. C. to 360.degree. C. (converted to atm. press.) which is obtained by treating a raw material fraction in the presence of an acid catalyst. The raw material fraction is obtained from the product of thermal cracking of petroleum hydrocarbons at a temperature of 700.degree. C. or above and mainly contains the distillate having boiling points in the range of 75.degree. C. to 198.degree. C. and the main components thereof are monocyclic aromatic hydrocarbons (excluding aromatic olefins) and monocyclic aromatic olefins.

Abstract: A method for aralkylation of benzene or alkylbenzenes which is characterized in that an aromatic olefin having a double bond or double bonds which are conjugated with the benzene ring is added to the benzene or alkylbenzenes in the presence of at least one member of catalyst selected from the group consisting of the compounds represented by the general formula:C.sub.n F.sub.2n+1-m Cl.sub.m SO.sub.3 Hin which the symbol n is an integer from 1 to 5 and m is 0 or 1. Since the selectivity to the aromatic olefin in the reaction is excellent, the mixture of aromatic olefins and aliphatic olefins can be employed as one of the starting material.

Abstract: A method for preparing polycyclic aromatic hydrocarbons with excellent yield and selectivity but without the formation of cyclic dimers and other undesirable by-products. In the method of the present invention, styrene, .alpha.-methylstyrene, .beta.-methylstyrene and/or vinyltoluene is dimerized and/or codimerized to produce unsaturated dimer and/or codimer in the first step reaction and said unsaturated dimer and/or codimer is caused to react with an aromatic hydrocarbon or hydrocarbons in the second step reaction, and both the first and second step reactions are carried out in the presence of a catalyst which is represented by the general formula: RCF.sub.2 SO.sub.3 H, in which the symbol R is Cl, F or C.sub.n F.sub.p CL.sub.2n+1-p, wherein n is an integer from 1 to 3 and p is also an integer from 1 to 2n+1.

Abstract: This invention provides a method of processing thermal cracked by-product oil which comprises reacting a distillate from a thermal cracked by-product oil principally containing components of a boiling range between 75.degree. C. and 198.degree. C. said distillate being one of the distillates from the cracking of petroleum hydrocarbons at a cracking temperature of 700.degree. C. or higher, and containing a ratio of 5-100 molar percent aromatic olefins to non-olefinic aromatic hydrocarbons, in liquid phase in the presence of an acid catalyst under such conditions that the reaction temperature is 0.degree. C.-200.degree. C., the liquid residence time is 0.1 hour-5 hours and wherein the content of aromatic olefins in the reaction system are 5% by weight or less at the end of the reaction, to yield a processed distillate containing non-condensed di- and tricyclic aromatic compounds which are reaction products of aromatic olefins with other aromatic hydrocarbons but no substantial amount of unsaturated components.

Abstract: The present invention provides novel electric insulating oil compositions and a process for preparing the same. The electric insulating compositions of the invention comprise distillates within a boiling range in terms of normal pressure between 265.degree. C. and 360.degree. C. obtained by processing a hydrocarbon mixture from cracking of petroleum hydrocarbons at a temperature of 700.degree. C. or higher principally composed of components with a boiling range between 75.degree. C. and 198.degree. C., said components mainly containing monocyclic aromatics and comprising aromatic olefins of said boiling range, in liquid phase in the presence of an acid catalyst under such conditions that the reaction temperature is from 0.degree. C. to 200.degree. C., the liquid residence time is from 0.1 hour to 5 hours and the concentration of aromatic olefins in the reaction system is 10% by weight or below.

Abstract: The present invention provides a process for aralkylation of alkylbenzenes wherein an alkylbenzene or alkylbenzenes containing in the substituent alkyl group or groups from 1 to 4 carbon atoms in total is aralkylated with at least one styrene selected from the group consisting of styrene, vinyltoluenes and .alpha.-methylstyrene which comprises carrying out the reaction by continuously feeding to a catalyst layer the above-mentioned alkylbenzene or alkylbenzenes and styrene sources in liquid phase at a temperature from 100.degree. C. to 200.degree. C., said catalyst layer being filled with synthetic silica-alumina containing from 20% by weight to 50% by weight alumina that has been calcined at a temperature in the range from 450.degree. C. to 600.degree. C.