摘要:
The invention is concerned with antioxidants. A new compound, N-(2-amino-3-ethyl-α-methylbenzylidene)-2,6-diethylaniline, is provided which is effective for inhibiting oxidative deterioration of organic materials, e.g. lubricating oils. The invention encompasses the preparation of the compound. Also provided are mixtures of the said compound with other aromatic amine compounds, such additive mixtures also being effective as antioxidants. The invention also includes the antioxidant use of the said compound, of the additive mixtures and of certain at- kylated anilines, and organic materials when afforded antioxidant protection thereby.
摘要:
A two-stage process for the production of linear phosphonitrilic chloride oligomers is provided. In the first step, phosphorus trichloride (PCl 3 ) and chlorine are reacted in a suitable liquid reaction medium. In the second step PCl 3 , Cl 2 and NH 3 are concurrently fed into the medium white maintaining a temperature at 100°C to 140°C. The feeds of the reactants are controlled so that until the first half of the NH 3 has been reacted the molar ratio of PCl 3 :NH 3 (including the PCl 3 of the first step) is kept above two. Thereafter, the feeds are adjusted so that with respect to the total amount of ammonia, said molar ratio is between 1.2 and 1.5. Linear phosphonitrilic chloride oligomers having a number average degree of polymerization from 2 to 9 are produced in high yield.
摘要:
An improved process is provided for the production of thioalkyl aniline compounds, which are known and useful as intermediates for producing anthelmintic, antibacterial and fungicidal benzimidazole compounds. According to the process a thiocyano aniline compound, an alcohol and an alkali metal cyanide are reacted, with the additional presence of an alkyl halide, and also with a dipolar aprotic solvent, or in the preence of an immiscible solvent and a phase transfer catalyst. A further improvement consists of providing said phase transfer catalyst as a polymer-bound catalyst.
摘要:
A process for the preparation of organic acid halide such as acetyl chloride by reacting an organic acid anhydride with a silicon halide, such as silicon tetrachloride, under conditions such that the organic acid halide is produced along with silica which is easily separated and disposed of. A Lewis Acid metal halide catalyst is used and superior yields are obtained. The reaction is desirably carried out in the presence of a chlorohydrocarbon solvent in which the metal halide catalyst chosen and the reactants and products are soluble.
摘要:
A clean performing gear oil for use in transmission oils and axle lubricants is provided. The gear oil having a Brookfield Viscosity at -12 DEG C ranging from about 1,000 to about 150,000 cP, comprises a base oil having a kinematic viscosity at 100 DEG C ranging from about 4.0 to about 41.0 cSt. Combined with the base oil is a mixture of a pour point depressant and a dispersant viscosity index improver. In addition, the gear oil includes a performance additive which imparts additional necessary properties for the overall performance of the gear oil in transmission and axle lubricants.
摘要:
Effective dispersants for use in compression ignition fuels are described as are compression ignition fuels containing such dispersants. The invention includes a fuel composition comprising: (a) a compression-ignition internal combustion fuel; and (b) a Mannich dispersant additive formed from: (1) at least one alkyl-substituted hydroxyaromatic compound; (2) at least one aldehyde; (3) a primary or secondary amine; wherein the molar ratio of the alkyl-substituted hydroxyaromatic compound to the aldehyde is in the range of from 1:1.25 to about 1:2; and wherein the molar ratio of the alkyl-substituted hydroxyaromatic compound to the amine is in the range of from about 1:1.25 to about 1:2.