Abstract: The invention provides a lube base oil other than silicone oil having a kinematic viscosity of 12 mm2/s or below at 40° C., exhibiting, in Noack test (250° C., 1 hr), an evaporation loss of 30 mass % or below and/or a flash point of 200° C. or higher, and exhibiting an aniline point of 60° C. or higher. There is also provides a lubricating oil composition comprising the lube base oil mixed with at least one additive selected from the group consisting of an antioxidant, a viscosity index improver, a detergent dispersant, a friction reducing agent, a metal inactivator, a pour point depressant, an abrasion resisting agent, a defoamer, and an extreme-pressure additive. The lube base oil and the lubricating oil composition realize reduction of evaporation loss despite being of low viscosity and excellent compatibility with organic materials.

Abstract: The invention provides processes for the recovery of a catalyst which are to be applied to the reactions wherein boron trifluoride or a complex thereof is used as the catalyst, that is, (I) a process for the recovery of a catalyst which comprises using as the reaction solvent a solvent containing a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound and, after the completion of the reaction, separating the reaction solvent from the reaction mixture; and (II) a process for the recovery of a catalyst which comprises extracting boron trifluoride or a complex thereof from the reaction mixture after the completion of the reaction by using a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound as the extracting solvent. According to the processes, boron trifluoride or complexes thereof used as catalyst can be easily separated from the reaction mixtures and re-used.

Abstract: A material for organic electroluminescence devices comprising a compound in which a heterocyclic group having nitrogen is bonded to an arylcarbazolyl group or a carbazolylalkylene group and an organic electroluminescence device comprising an anode, a cathode and an organic thin film layer comprising at least one layer and disposed between the anode and the cathode, wherein at least one layer in the organic thin film layer comprises the material for organic electroluminescence devices described above. The material can provide an organic electro-luminescence device emitting bluish light with a high purity of color. The organic electroluminescence device uses the material.

Abstract: A material for electroluminescent which comprises a compound in which a cycloalkyl group or a meta-phenylene group is bonded to a group having carbazole skeleton structure and an organic electroluminescent device having an organic thin film layer having at least one layer which is sandwiched between the cathode and the anode and contains the above material in at least one layer, are provided. The material can provide organic electroluminescent devices emitting bluish light with a high purity of color. The organic electroluminescence device uses the material.

Abstract: A material for organic electroluminescence devices comprising a compound in which a heterocyclic group having nitrogen is bonded to an arylcarbazolyl group or a carbazolylalkylene group and an organic electroluminescence device comprising an anode, a cathode and an organic thin film layer comprising at least one layer and disposed between the anode and the cathode, wherein at least one layer in the organic thin film layer comprises the material for organic electroluminescence devices described above. The material can provide an organic electroluminescence device emitting bluish light with a high purity of color. The organic electroluminescence device uses the material.

Abstract: An organic electroluminescence device having excellent properties of high luminance, high efficiency of light emission and long life and a novel compound having an aluminum complex structure used as a component in said device are disclosed. The invention provides an organic electroluminescence device comprising a compound having an aluminum complex structure represented by the general formula (I): ##STR1## wherein X indicates --Ar.sup.1 --Y--Ar.sup.2 -- or an aryl- or alkylsilylene group, Ar.sup.1 and Ar.sup.2 indicate each an aromatic ring, Y indicates an alkylene group, a cycloalkylene group, an alkylidene group, a cycloalkylidene group, --CO--, --O--, --S-- or the like and L.sup.1 to L.sup.4 indicate each a ligand, such as a substituted or unsubstituted 8-quinolyloxy group or the like. The invention also provides a compound having an aluminum complex structure described above.

Abstract: An organic electroluminescence device including an oxadiazole or thiadiazole compound interposed between two electrons. The compound is of the formula ##STR1## wherein Z.sup.1 and Z.sup.2 are each an unsubstituted or substituted aromatic group; Y.sup.1 and Y.sup.2 are each an unsubstituted or substituted aromatic group; Q is --O--, --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --; or --C(CH.sub.3).sub.2 ; and X is --O-- or --S--. The organic electroluminescence device has a high brightness, a high luminous efficiency and a long service life.

Abstract: A process for producing aromatic nitrile, comprising reacting aromatic halide substituted by a nitro group in the ortho position relative to the halogen atom with 0.1 to 0.99 mol of cuprous cyanide and 0.1 to 2.0 mol of alkali cyanide, both being per mol of said aromatic halide, in a polar solvent, the amount of said aprotic solvent being 0.1 to 30 parts by weight per 100 parts by weight of said aromatic halide.

Abstract: In the process for producing a carbonyl compound by contacting olefin and oxygen or oxygen-containing gas with a catalyst in the presence of water, a catalyst comprising a carrier and (a) rhodium, (b) manganese and (c) at least one of the Group IIIA elements (excluding an actinium series elements) is used. Also, the catalyst further containing zinc compounds as the component (d) is used.According to this invention, the selectivity and the conversion of carbonyl compound such as methyl ethyl ketone are highly improved, and halogenated compounds are not produced.