Preparation method of SBA-16/MOR composite molecular sieve, catalyst and application in double branched chain isomerization

Abstract

The invention relates to the field of petroleum processing, discloses a preparation method of a novel SBA-16 / MOR composite molecular sieve material and application in double branched chain isomerization for the first time, and in particular relates to a low-cost green preparation method of an SBA-16 / MOR composite molecular sieve material with suitable acidity and a three-dimensional stepped pore channel structure and a double-branched-chain isomerization catalyst prepared by loading non-noble metal on the SBA-16 / MOR composite molecular sieve material. The catalyst is applied to a catalytic cracking (FCC) gasoline hydroisomerization reaction. According to the catalyst, natural minerals are used as raw materials for green synthesis of an MOR molecular sieve nanocrystalline precursor solution without a template agent, and then an SBA-16 / MOR composite molecular sieve carrier is prepared through in-situ assembly by adopting a prehydrolysis method under low acidity, so that the production cost is greatly reduced, the equipment damage is relieved, and the pollutant emission is reduced. Therefore, the method provided by the invention has good economic and environmental benefits, and provides technical support for upgrading the quality of oil products in China.

Description

technical field

[0001] The invention relates to the field of petroleum processing, in particular to a preparation method of a novel SBA-16 / MOR composite molecular sieve material and its application in double branched chain isomerization. Background technique

[0002] Since 2019, my country has gradually implemented the strict national VIA gasoline emission standards across the country. This measure will further increase the requirements for oil quality upgrading technology. Catalytic cracking (FCC) gasoline has always been the most popular gasoline in my country. The main blending component of gasoline, but its olefin content is high. The main difficulty in upgrading the quality of oil products in my country is to reduce gasoline olefins while maintaining octane number. Isomerized oil has high octane number and low sulfur content, and does not contain olefins, aromatics, and benzene. Therefore, alkane isomerization technology has become a research hotspot in the field of prod...

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