Catalyst for producing lubricant base oil and preparation method thereof

Abstract

The present invention relates to a catalyst for producing base oil, the catalyst comprises a composite carrier and an active component, the active component is a noble metal, the composite carrier comprises a molecular sieve fragment structure unit and a base carrier, and the preparation method of the composite carrier comprises the following steps: placing a molecular sieve in an acidic or alkaline solution, fully stirring to obtain a turbid solution A; adjusting the pH value of the turbid solution A to 6-8 through acid or alkali to obtain a turbid solution B containing molecular sieve fragment structural units; the preparation method comprises the following steps: uniformly mixing a molecular sieve containing a ten-membered ring structure and an amorphous inorganic porous material to obtain mixed powder, uniformly mixing an auxiliary agent and deionized water, dropwise adding the mixture into the mixed powder, kneading, carrying out extrusion molding, homogenizing, drying and roasting to obtain a basic carrier; adding a basic carrier into the turbid solution B for dipping, homogenizing, drying and roasting to obtain a composite carrier, and loading noble metal on the carrier to prepare a catalyst applied to the field of lubricant base oil.

Description

technical field [0001] The invention relates to a catalyst for producing lubricating base oil, in particular to a catalyst for producing lubricating base oil and a preparation method thereof. The catalyst for producing lubricating base oil is suitable for using paraffin-based vacuum wax oil, cycloalkyl vacuum Wax oil, intermediate base vacuum gas oil and / or hydrocracking tail oil are used as raw materials to produce lubricating oil base oil. Background technique [0002] The American Petroleum Institute (API) provides an industry-accepted method for classifying base oils into five groups based on their sulfur content, saturates / paraffins content, and based on their viscosity index. Group I base oils contain greater than 0.03% sulfur, less than 90% saturated hydrocarbon content, and have a viscosity index in the range of 80 to 120; Group II base oils contain less than 0.03% sulfur, 90% or greater saturated hydrocarbon content, And has a viscosity index in the range of 80 to ...

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Problems solved by technology

[0009] Chinese patent ZL03105398.X discloses a method for reducing the cloud point of lubricating oil base oil. The lubricating oil raw material is subjected to solvent dewaxing to produce dewaxed oil with a pour point of -5~-15°C, and the dewaxed oil is hydrotreated- The isomerization dewaxing method produces lubricating base oils with low cloud points, but the cloud point range is between -1 and 21°C. From the perspective of patent analysis, the purpose of effectively reducing the cloud point cannot be achieved

[0010] Chinese patent ZL200910242071.1 discloses a method for reducing the base oil of lubricating oil, by loading the precious metal Pt or Pd or the combination of Pt and Pd on the carrier composed of MFI-MCM composite molecular sieve and alumina, and hydrogenation by high-pressure hydrogenation method Hydrogenation of the base oil reduces the pour point of the base oil by 6-14°C and the cloud point by 15-55°C, making the cloud point of the base oil in the range of -25-10°C. This method has a certain effect on reducing the cloud point effect, but from the evaluation of the raw material, the raw material should be a finished lubricating oil base oil. This method does not disclose the distillation range of the raw material and its impact on the viscosity index.

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