A kind of hydrogenation catalyst and its preparation method and application

Abstract

The invention discloses a preparation method of a hydrogenation refining catalyst. The method comprises the following steps: (1) performing high-temperature calcination on original clay, enabling the calcinated clay to react with mixed acid, and pulping so as to form a serous fluid, wherein the mixed acid is the mixture of strong acid and weak acid; (2) adding a Y-shaped molecular sieve into the serous fluid obtained in the step (1), uniformly stirring, adding an acid solution containing aluminum and an alkaline solution in a concurrent flow manner to carry out a gelatinizing reaction, and aging, filtering, washing and drying, so as to obtain alumina powder containing silicon; (3) adding an adhesive into the alumina powder containing silicon, which is prepared in the step (2), and performing extrusion molding, drying and calcination, so as to obtain an alumina carrier containing silicon; (4) preparing a nickel-tungsten active-component solution which contains grease and an organic acid, adding the carrier prepared in the step (3) into the nickel-tungsten active-component solution to dip, and drying and calcinating, so as to obtain the hydrogenation catalyst. Appropriate bonding force is generated between the catalyst carrier and active components, and the degree of dispersion of the active components is moderate. The catalyst is applied in a paraffin hydrorefining reaction, and has the advantages of high stability, high quality of paraffin hydrorefining products, and the like.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and its preparation method and application, in particular to a paraffin hydrorefining catalyst and its preparation method and application. Background technique [0002] With the heavy and inferior quality of crude oil and the continuous increase in the number of imported crude oil, the sources of raw materials for paraffin hydrorefining are diversified, coupled with the use of various additives in the oil recovery process and fluctuations in the production process of some refineries, paraffin wax The downward trend of raw material quality is becoming more and more obvious. At the same time, with the birth of the new paraffin wax standard, the smell of food-grade paraffin wax has been reduced from 1 to 0 in the original standard. Some refineries use clay for supplementary refining or pre-refining, resulting in an increase in processing costs and a decrease in product yield. At the same time, waste clay ...

AI Technical Summary

Problems solved by technology

The above existing paraffin hydrogenation technologies generally have the problem that the product quality cannot meet the requirements during long-term operation

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