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Catalyst for decreasing cloud point of lube base oil and preparation method thereof

A lubricating oil base oil and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of limited conversion capacity of macromolecules and high cloud point of lubricating base oil products

Active Publication Date: 2011-06-08
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a microporous and mesoporous composite molecular sieve-based catalyst and its preparation method, which are used to reduce the cloud point of lubricating oil base oil, so as to solve the problem of microporous Molecular sieve catalysts have limited ability to convert macromolecules in lubricating base oils, resulting in a high cloud point of lubricating base oil products

Method used

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  • Catalyst for decreasing cloud point of lube base oil and preparation method thereof
  • Catalyst for decreasing cloud point of lube base oil and preparation method thereof
  • Catalyst for decreasing cloud point of lube base oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method and experimental operation steps of catalyst a are as follows:

[0016] Step ①: Based on the total weight of the mixed substance obtained in step ③, 5% of the ZSM-5 molecular sieve sample with a Si / Al molar ratio of 25.0 is used for 100% of the equivalent volume of adsorption with 0.2mol / L NaOH solution Stirring treatment at 80°C for 0.5h to obtain ZSM-5 microporous molecular sieve treated with alkali;

[0017] Step 2.: Based on the total weight of the mixed substance obtained in step 3., 15% cetyltrimethylammonium bromide template, 0.5% sodium aluminate and 30% sodium silicate and the rest water, stir evenly to obtain a gel;

[0018] Step ③: Add the alkali-treated microporous molecular sieve obtained in step ① into the gel obtained in step ②, stir evenly, and then use dilute H 2 SO 4 The solution adjusts the pH value of the synthesis system to 10.5;

[0019] Step ④: transfer the homogeneous colloid obtained in step ③ into a synthesis kettle, ...

Embodiment 2～4

[0023] According to the experimental procedure of Example 1 and the raw materials and operating conditions shown in Table 1, catalysts a, b, c, and d can be obtained.

[0024] Table 1 The parameters related to the preparation of catalysts a~d

[0025]

[0026]

Embodiment 5

[0028]The hydrogen-type composite molecular sieve obtained by ion exchange in Example 1 was prepared catalyst e according to the same aftertreatment method in Example 1 (by weight percentage of the catalyst, the content of alumina was 49%, and the content of Pt was 0.05%).

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Abstract

The invention relates to a catalyst for decreasing the cloud point of lube base oil and a preparation method thereof. The catalyst comprises the following components in percentage by weight: (a) 0.05-2.0% of Pt or Pd or combination of Pt and Pd or non-precious metal or metal oxides of Pt or Pd, (b) 25.0-74.5% of a composite molecular sieve MFI-MCM of a microporous molecular sieve with an MFI topological structure and a mesporous molecular sieve MCM-41; and (c) 25-74.5% of alumina, wherein the composite molecular sieve MFI-MCM has the specific surface of 600-1100m<2> / g and the Si-Al molar ratio of 20-100, and the MFI-type microporous molecular sieve in the composite molecular sieve MFI-MCM is a molecular sieve ZSM-5 with the relative crystallinity of 10-40%. After lube base oil is processed with the catalyst provided by the invention, the cloud point is decreased by 15-55 DEG C, and a pour pint is decreased by 6-14 DEG C.

Description

technical field [0001] The invention relates to a hydrorefining catalyst and a preparation method thereof, in particular to a lubricating oil hydrodewaxing catalyst and a preparation method thereof. Background technique [0002] Song Chunmin of China University of Petroleum (East China) disclosed a preparation method of MCM-41, ZSM-5 and their composite molecular sieves in the paper "Synthesis, Characterization and Application of New Microporous-Mesoporous Composite Aluminum Silicate Molecular Sieves" , this paper starts from the commercial microporous zeolite to prepare the synthesis route of composite molecular sieves, tries to obtain mesoporous molecular sieve materials with strong acidity and high hydrothermal stability, and explores the assembly behavior of different assembly routes. However, the catalytic performance of the molecular sieve has higher isomerization selectivity for non-hydrogenation reactions and higher cracking selectivity for hydrogenation reactions. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/44
Inventor 马莉莉宋春敏蔡烈奎甄新平王延臻熊春珠乔柯李静王雪梅李辉
Owner PETROCHINA CO LTD
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