A kind of WSI high-pressure hydrogenation shape-selective isomerization-supplementary refining method

Abstract

The invention provides a WSI high-pressure hydrogenation shape selective isomerism-finishing refining method which comprises the following steps: mixing raw oil with hydrogen, performing heating temperature increase, and feeding into an isomerism dewaxing reactor filled with an isomerism catalyst to implement a reaction; after the reaction is completed, adjusting the temperature to 260-280 DEG C,and adding triethylamine hydrochloride chlorine aluminate to react for 60-80 minutes; mixing a reaction product of the isomerism dewaxing reactor with thiourea, separating so as to obtain a complex compound, feeding into a finishing refining reactor with a refining reaction catalyst, and introducing hydrogen to implement a reaction; and performing gas-liquid separation on a reaction effluent, thereby obtaining a product. By adopting the method, the yield of the obtained product is up to 95%, the kinematic viscosity of the product at 40-100 DEG C is up to 23.8-8.1mm<2>.s<-1>, the viscosity index of the product is up to 157, the pour point of the product is up to minus 50 DEG C, the sulfur content of the product is as low as 0.20mu g / g, the content of nitrogen in the product is as low as 0.10mu g / g, the oxidation security of the product is as high as 50.4h, and the product is excellent in product quality and is basic oil for blending high-class lubricating oil.

Description

technical field [0001] The invention relates to the field of petrochemical processing, in particular to a WSI high-pressure hydrogenation shape-selective isomerization-supplementary refining method. Background technique [0002] The American Petroleum Institute (API) divides lubricating oil base oils into API I, II, III, IV and V base oils. The processing technology of lubricating oil base oil is different, and the quality of the base oil produced is also different. The "old three sets" of lubricating oil processing technology represented by solvent refining, solvent dewaxing, and clay refining (or hydrogenation supplementary refining) produce API Group I base oils, which have low viscosity index, high sulfur content, and low saturated hydrocarbon content. , can only be used as ordinary lubricating oil, and cannot meet the requirements of high-grade lubricating oil. Before the 1960s, base oil production mainly used physical methods for refining and pour point reduction, an...

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Problems solved by technology

[0003] However, there are still unsatisfactory base oil yields and unsatisfactory product quality in the prior art. In particular, the obtained base oil can only reach API class I base oil, and further processing is required to obtain class II and class III base oils, resulting in Its process is more cumbersome

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