Preparation method of hydrodearomatization catalyst, hydrodearomatization catalyst and application of hydrodearomatization catalyst

Abstract

The invention discloses a preparation method of a hydrodearomatization catalyst, the hydrodearomatization catalyst and application of the hydrodearomatization catalyst. The preparation method of the hydrodearomatization catalyst comprises the following steps: (I) preparing an Al-SBA-15 molecular sieve, and then mixing the Al-SBA-15 molecular sieve with a modified Y molecular sieve, aluminum oxide and water to prepare slurry; (II) adding a solution containing active metal components and an aqueous solution of ethylene glycol into the slurry prepared in the step (I) to obtain a mixed slurry; (III) filtering, washing and drying the mixed slurry prepared in the step (II) to obtain a catalyst precursor; and (IV) crushing the catalyst precursor prepared in the step (III), mixing and kneading, forming, drying and roasting to obtain the hydrodearomatization catalyst. The hydrodearomatization catalyst prepared by the method has the characteristics of high hydrodearomatization activity, good selectivity, excellent product quality and the like. The hydrodearomatization catalyst is especially suitable for hydrodearomatization processes in which naphthenic oil with high heavy aromatics content is subjected to hydro-upgrading and isomerization and then is subjected to hydrorefining.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation dearomatization catalyst, which is particularly suitable for the preparation method of a hydrogenation dearomatization catalyst for supplementary refining of naphthenic oil with high aromatic content. Background technique [0002] Under aerobic conditions, high-grade lubricating oil, food-grade white oil and other hydrotreated oils are highly sensitive to sunlight and ultraviolet radiation. Exposure to sunlight and air for a certain period of time will cause the appearance and performance of the oil to be unstable. The color of the oil will deepen, and in severe cases, precipitation will occur. This type of oil requires low viscosity, high flash point and boiling point, and low volatility. Oil products with low aromatic content, non-corrosiveness, colorless and odorless, good thermal stability and oxidation stability, not easy to cause gelation, and good biological properties are more in...

AI Technical Summary

Problems solved by technology

The specific surface area and pore volume of the catalyst obtained by this method are small, the acid center is partially covered, and the total acid content and acidity distribution cannot meet the requirements in the reaction process, and further improvement is needed

Secondly, in this method, since the precious metal is sprayed on the mixture, and then the catalyst is prepared through kneading, extruding, roasting and other processes, the loss of the precious metal in this process is large, the cost of the catalyst is significantly increased, and the preparation route is poor in operability, so it is not suitable for mass production

[0006] CN101745383A discloses a preparation method of a deep hydrogenation dearomatization catalyst, the main active component is Pt, the auxiliary agent is Pd, and the carrier is an amorphous silicon aluminum carrier, SiO 2 The content is 40% to 60% of the weight of the carrier. The carrier acidity of the catalyst prepared by this method is low, the metal dispersion is poor, the catalyst activity is low, and the effect of dearomatization is poor.

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