Isomerization dewaxing catalyst and its prepn.

Abstract

The present invention discloses one kind of isomerizing and dewaxing catalyst for lubricant oil production and its preparation. Specifically, SAPO-11 as acid component and organic matter are used tomodify prepared catalyst carrier and to protect the medium strength acid centers on the carrier, and the dried carrier is loaded with active metal component and high temperature roasted to release its protected acid centers and to produce the catalyst of the present invention. The catalyst is used for the isomerizing and dewaxing reaction of lubricant oil fraction in the presence of hydrogen, and has the advantages of high yield of lubricant oil base oil, low product pour point, high viscosity index and other advantages.

Description

1. Technical field

[0001] The invention discloses a isomerization dewaxing catalyst for producing lubricating oil base oil and a preparation method thereof. The catalyst of the invention is used for the isomerization reaction of wax in lubricating oil fractions under the presence of hydrogen, and has the characteristics of high yield of lubricating oil base oil, low pour point, high viscosity index and the like. 2. Background technology

[0002] The lubricating oil fraction contains a large amount of macromolecular linear or less branched alkanes (here called waxes) with higher melting point, so it has high pour point, low viscosity index and poor low temperature performance. Therefore, it is necessary to remove the high melting point wax. At present, the commonly used dewaxing methods mainly include solvent dewaxing, catalytic dewaxing and isomeric dewaxing.

[0003] Solvent dewaxing is to use the solubility of wax in solvent to remove it. The disadvantage of this method ...