Catalytic reformate refining deolefination catalyst and preparation method thereof

Abstract

The invention discloses a catalytic reformate refining deolefination catalyst. The catalytic reformate refining deolefination catalyst comprises, by mass, 30-70% of Al2O3 and 30-70% of a molecular sieve. The invention also discloses a preparation method of the catalyst. Through a dipping method, the molecular sieve catalyst carrier is loaded with Al2O3. The catalyst has high activity, good stability and a long usage period, can be cycled, reduces labor intensity and reduces construction on-site safety hidden trouble and environment pollution.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a catalytic reformed oil refining deolefin catalyst and a preparation method thereof. Background technique [0002] Benzene, toluene and xylene (BTX) are important organic chemical raw materials, mainly derived from the catalytic reforming reaction of naphtha. The reformed oil is rich in aromatics and solvent oil fractions, and also contains a certain amount of olefin impurities. Olefins are active in nature, not only easy to polymerize to form colloid, but also may react with other components, which will have a great impact on the subsequent processing. At present, the mature olefin removal process in industry includes hydrofinishing and acid clay refining, but hydrofining is very important for C 6 ~C 9 For aromatics wide fraction products, it is difficult to fully consider the depth of hydrogenation reaction and cause the loss of aromatics; the white clay refining...

AI Technical Summary

Problems solved by technology

Olefins are lively, not only easy to polymerize to form colloids, but also may react with other components, which will have a great impact on the subsequent processing

At present, the mature olefin removal process in industry includes hydrofinishing and acid clay refining, but hydrofining is very important for C 6 ~C 9 For aromatics wide fraction products, it is difficult to fully consider the depth of hydrogenation reaction and cause the loss of aromatics; the white clay refining process has the advantages of simple process and low investment and operation costs, so most of the aromatics plants at home and abroad currently adopt this scheme, but this The process has disadvantages such as easy deactivation of white clay, difficulty in regeneration, frequent replacement and serious environmental pollution.

With the development of continuous reforming technology and the improvement of reaction severity in recent years, the content of olefins in the reformed oil is continuously increasing. The problems of short service life of clay, frequent replacement and high labor intensity are common in domestic aromatics plants. At the same time, too high olefin content will also affect the service life of the molecular sieve in the downstream adsorption tower and the quality of aromatic products, and the clay cannot be regenerated, and the discarded clay will cause serious environmental pollution problems.