摘要:
Synthetic lubricating oils having a predetermined alkylaromatic structure are prepared from a mixture of mono- or dialkenyl benzene with an aliphatic olefin by free-radical reaction in the presence of ditertiary-butyl peroxide, for example. Equivalent napthalene derivatives may be substituted for the dialkenyl benzene. The oils that are formed exhibit a high Viscosity Index, and a low pour point. The viscosity of the synthetic lube stock produced may be controlled by changing the amount of peroxide used.
摘要:
Large pore size zeolites produced with organic cations in the synthesis mixture are synthesized with high silica:alumina ratios by terminating the crystallization when the product is partly crystalline, preferably 30% to 90 % crystalline by X-ray diffraction measurement. The method is particularly useful with zeolite beta to produce a partly crystalline product with higher silica:alumina ratio by direct synthesis.
摘要:
Lubricants of improved characteristics are produced by carrying out a solvent extraction to remove aromatic components after solvent or catalytic dewaxing. Aromatic extraction solvents such as phenol, furfural or N-methyl pyrrolidone may be used. The process is particularly useful with wax-derived lubricants produced by the hydroisomerization of a petroleum wax which has then been dewaxed.