摘要:
The polycarbonates of the present invention include those of sucrose series having a specific cyclic structure, those of oligosaccharide and monosaccharide series other than the sucrose series, those derived from specific saccharides having no cyclic structure, those having a skeletal structure of pentaerythritol, neopentyl glycol or trimethylolmethane, and specific dicarbonates.The lubricating oil and electrical insulating oil of the invention contain the above-mentioned polycarbonates.The polycarbonates of tile invention are excellent in compatibility with Freon R-134a (HFC) as well as in lubricating properties, detergency and electrical insulating properties, and are capable of providing lubricating oil for refrigerator, automotive engine oil, automotive gear oil, lubricating oil for rolling and lubricating oil for fiber, especially lubricating oil for which electrical insulating properties are required, and electrical insulating oil.
摘要:
The polycarbonates of the present invention include those of sucrose series having a specific cyclic structure, those of oligosaccharide and monosaccharide series other than the sucrose series, those derived from specific saccharides having no cyclic structure, those having a skeletal structure of pentaerythritol, neopentyl glycol or trimethylolmethane, and specific dicarbonates.The lubricating oil and electrical insulating oil of the invention contain the above-mentioned polycarbonates.The polycarbonates of the invention are excellent in compatibility with Freon R-134a (HFC) as well as in lubricating properties, detergency and electrical insulating properties, and are capable of providing lubricating oil for refrigerator, automotive engine oil, automotive gear oil, lubricating oil for rolling and lubricating oil for fiber, especially lubricating oil for which electrical insulating properties are required, and electrical insulating oil.
摘要:
The polycarbonate of the invention is a polycarbonate derived from adducts such as propylene oxide adducts of polyglycerols. The lubricating oil of the invention comprises this polycarbonate, and if necessary, a specific polycarbonate having a --C.sub.2 H.sub.4 O-- group and/or a --CH.sub.2 CH(CH.sub.3)O-- group in its main chain. The lubricating oil of the invention can be used as a lubricating oil for refrigerators such as automotive air-conditioner and electric refrigerator. In particular, the lubricating oil of the invention is suitable as a lubricating oil for refrigerator wherein high-viscosity lubricating oil is used, for example, lubricating oil for automotive rotary air-conditioner, and also suitable as lubricating oil for a refrigerator wherein ozone layer-nondestructive hydrogenated fluorocarbon such as R-134a is used as a refrigerant.
摘要:
In a process for producing an alkyl group-substituted aromatic hydrocarbon according to the present invention, (i) an aromatic hydrocarbon is reacted with (ii) an alkylating agent selected from the group consisting of olefins, lower aliphatic alcohols and alkyl halides in the presence of a mordenite-type zeolite catalyst treated with a fluorine-containing compound, and therefore the conversion of the aromatic compound can be increased and further it is possible to introduce the specific number of alkyl groups into the specific position of the aromatic compound.In particular, when biphenyl is used as the aromatic hydrocarbon and propylene is used as the alkylating agent, p,p'-diisopropylbiphenyl can be obtained in a high yield and high selectivity.
摘要:
A process for producing a linear unsaturated dimer of .alpha.-alkyl styrenes by heating .alpha.-alkyl styrenes in the presence of a silica-alumina catalyst, said catalyst consisting of alumina and silica in a weight ratio of 83/17.ltoreq.Al.sub.2 O.sub.3 /SiO.sub.2 .ltoreq.96/4 and being substantially free of alkali is disclosed.
摘要翻译:一种通过在二氧化硅 - 氧化铝催化剂存在下加热α-烷基苯乙烯生产α-烷基苯乙烯的线性不饱和二聚体的方法,所述催化剂由氧化铝和二氧化硅组成,重量比为83/17 Al 2 O 3 / SiO 2 = 96/4,并且基本上不含碱。
摘要:
The polycarbonates of the present invention include those of sucrose series having a specific cyclic structure, those of oligosaccharide and monosaccharide series other than the sucrose series, those derived from specific saccharides having no cyclic structure, those having a skeletal structure of pentaerythritol, neopentyl glycol or trimethylolmethane, and specific dicarbonates.The lubricating oil and electrical insulating oil of the invention contain the above-mentioned polycarbonates.The polycarbonates of the invention are excellent in compatibility with Freon R-134a (HFC) as well as in lubricating properties, detergency and electrical insulating properties, and are capable of providing lubricating oil for refrigerator, automotive engine oil, automotive gear oil, lubricating oil for rolling and lubricating oil for fiber, especially lubricating oil for which electrical insulating properties are required, and electrical insulating oil.
摘要:
A polycarbonate lubricating oil composition which is resistant to decomposition of the polycarbonate and the generation of carbon dioxide gas. The lubricating oil composition contains a polycarbonate lubricant, at least one compound selected from the group of epoxy compound, phenol compound, sulfur compound and amine compound, and optionally a triester phosphite or a triester phosphate compound as inhibitors to the generation of carbon dioxide gas. The lubricating oil composition are stable, have excellent lubricating properties, cleaning properties, and electrical insulating properties, and their viscosity at low temperature can readily be lowered.
摘要:
An orthoalkylated aromatic amine is produced at a high selectivity from the reaction of an aromatic amine having at least one hydrogen atom at the ortho-positions and a primary or secondary alcohol under heating in the presence of a catalyst containing, as a main constituent, iron oxides.
摘要:
A paraffin having 5 to 10 carbon atoms is catalytically cracked in the presence of a catalytically cracking catalyst having a strong acidity, especially a rare earth metal ion-exchanged mordenite or a dealuminized mordenite, to form a paraffin having 3 or 4 carbon atoms. The formed paraffin is contacted with a dehydrogenation catalyst to obtain an olefin having 3 or 4 carbon atoms.
摘要:
In a process for producing a mono- or di-ortho-methyl-substituted phenol which comprises methylating a phenol having one or two ortho-hydrogens with methanol in the presence of a catalytic amount of a catalyst comprising a major proportion of an oxide of iron as a first component (A) and a minor proportion of at least one oxide of metal other than iron as a second component (B), the improvement wherein said metal other than iron in component (B) is a metal selected from the group consisting of Ga, Ge, Y, Nb, Hf, Bi and Ta; and a catalyst used therefor.