Abstract: A lubricating oil composition is provided, which comprises a lubricating base oil and based on the whole weight of the lubricating oil composition, (A) 0.5 wt % to 10 wt % of a metal salicylate having a total base number of from 100 mg-KOH/g to 195 mg-KOH/g, (B) 0.1 wt % to 10 wt % of a diarylamine compound, (C) 0.1 wt % to 10 wt % of a hindered phenol compound, and (D) 1 wt % to 10 wt % of a polyalkenylsuccinimide and/or a boron-containing polyalkenylsuccinimide. Also provided is a lubricating oil composition which further comprises 0.1 wt % to 10 wt % of a metal phenate having a total base number of from 100 mg-KOH/g to 300 mg-KOH/g as a component (E) in addition to the above components (A) to (D). The lubricating oil composition is excellent in all properties of detergency, NO.sub.x oxidation resistance and thermal oxidation resistance and suitable as a long-life engine oil for gas engine heat pumps.

Abstract: The present invention relates to a heat-resistant catalyst carrier and a catalyst carrier molding comprising silica and alumina, in which a silica content is in a range of 2% by weight to 30% by weight, and an overall pore volume is at least 0.3 ml/g and a volume of pores having a diameter of 100 .ANG. or larger accounts for at least 60% of the overall pore volume, or which have a specific surface area of at least 20 m.sup.2 /g after firing at 1200.degree. C. in air, or which show a peak area at -110 ppm to -130 ppm which is 0 to 10% with respect to a peak area at -50 ppm to -130 ppm, as measured by the nuclear magnetic resonance (.sup.29 Si-NMR) method using silicone rubber (-21.9 ppm) as a reference peak after firing at 500.degree. C. in air, and is also concerned with a catalyst for combustion comprising the same.

Abstract: A polyolefin composition comprising (a) polyolefin, (b) vegetable fibers mainly composed of cellulose fibers, and (c) a deodorizer selected from the group consisting of a combination of a metallic soap and an amine antioxidant, activated carbon, zeolite and a phosphorus compound. Because of the deodorizer, the polyolefin composition has substantially no odor without sacrificing mechanical properties thereof. Accordingly, it may be used suitably for car parts required to have high mechanical strength with substantially no odor, such as unit cases of air conditioners.

Abstract: This invention relates to a polyolefin composition with an improved weather resistance, which comprises a polyolefin blended with (1) a benzotriazole compound, (2) a heterocyclic hindered amine compound and (3) a phenyl benzoate compound or nickel complex compound.