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Catalyst for producing low-cloud-point 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 high base oil cloud point, low conversion ability, and limited ratio

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

Conventional SAPO-11 molecular sieve dewaxing catalysts have high selectivity to straight chain hydrocarbons, but to some macromolecules with complex structures in lubricating oils, such as rings with low branched chain numbers and high relative molecular mass with long straight side chains. The conversion ability of the like hydrocarbons is low, resulting in a high cloud point of the lubricating base oil
The specific surface and pore volume of conventional microporous molecular sieves are mainly composed of micropores, and the proportion of mesopores of 2 to 50 nm and macropores above 50 nm is very limited, which makes conventional microporous molecular sieve catalysts suitable for lubricants with high relative molecular weight. Molecular conversion ability is very limited, which makes the cloud point of lubricating oil base oil high, which affects the normal use of lubricating oil

Method used

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  • Catalyst for producing low-cloud-point lube base oil and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Based on the total weight of the mixed substance before crystallization, 5% pseudo-boehmite, 15% phosphoric acid, 5% di-n-propylamine, 10% silica sol (SiO 2 The content is 40% by weight) and the balance of water are mixed evenly and then transferred to a synthesis kettle for crystallization at 200 ° C for 24 hours, washed to neutral, dried until no clear water appears, and AEL molecular sieves are obtained. Then account for 0.5% sodium metaaluminate, 20% sodium metasilicate, 4% cetyltrimethylammonium bromide, 10% synthetic AEL type microporous molecular sieve and the balance After mixing the water evenly, use 1.0mol / L ammonia solution to adjust the pH value to 9.0, transfer it to a synthesis kettle for crystallization at 140°C for 48 hours, wash until the solution is neutral, dry until no clear water appears, and roast at 500°C for 6 Hours later, the AEL-MCM composite molecular sieve with the mesoporous template removed was obtained. The composite molecular sieve was i...

Embodiment 2

[0018] Based on the total weight of the mixed substance before crystallization, 10% pseudo-boehmite, 20% phosphoric acid, 10% diisopropylamine, 1% silica sol (SiO 2 The content is 40% by weight) and the balance of water are mixed evenly, then transferred to a closed synthesis kettle, crystallized at 160°C for 96 hours, washed to neutral, and dried until no clear water appears to obtain AEL type molecular sieve. Then account for 15.0% sodium metasilicate, 2.0% aluminum nitrate, 3.0% cetyltrimethylammonium chloride, 0.5% synthetic AEL type microporous molecular sieve and the water of the remainder After mixing evenly, adjust the pH value to 11.0 with 1.0 mol / L hydrochloric acid, transfer to a closed synthesis kettle and crystallize at 100°C for 96 hours to obtain a composite molecular sieve. Dry the composite molecular sieve until no clear water appears, and after calcination at 700°C for 4 hours, exchange it with 1.0 mol / L ammonium carbonate aqueous solution for 6 hours to obta...

Embodiment 3

[0020] Based on the total weight of the mixed substance before crystallization, mix 8% of pseudoboehmite, 17% of phosphoric acid, 15% of di-n-propylamine, 3% of silica sol and the rest of the water and then transfer to an airtight The synthetic kettle was crystallized at 200°C for 48 hours, washed to neutrality, and dried until no clear water appeared to obtain AEL molecular sieve. Then account for 1% sodium metaaluminate, 10% silica sol (SiO 2 Content is 40% by weight), 5% cetyltrimethylammonium bromide, 4% synthetic AEL type microporous molecular sieves and the water of the remainder mix uniformly with 1.0mol / L ammonia solution to adjust the pH of the solution The value was 10.0, and transferred to a closed synthesis kettle for crystallization at 140°C for 48 hours. The composite molecular sieve was dried until no clear water appeared, and after calcination at 600°C for 5 hours, it was exchanged with 1.0mol / L ammonium carbonate aqueous solution for 5 hours to obtain a BET s...

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Abstract

The invention relates to a catalyst for producing low-cloud-point 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 AEL-MCM of a microporous molecular sieve with an AEL topological structure and a mesporous molecular sieve MCM-41; and (c) 25.0-74.5% of alumina. The catalyst has the advantages of larger specific surface, moderate acidity and more mesporous structures and is beneficial to macromolecular conversion reaction. After lube base oil is processed with the catalyst prepared with the method provided by the invention under the process conditions of the reaction pressure of 15.0MPa, the reaction temperature of 220 DEG C, the volume airspeed of 2.0h<-1> and the hydrogen-oil ratio of 500, the cloud point of a product is decreased by 20-55 DEG C, and a pour pint is decreased by 5-20 DEG C.

Description

technical field [0001] The invention relates to a lubricating oil hydrogenation catalyst and a preparation method thereof, in particular to a catalyst for producing low cloud point lubricating oil base oil and a preparation method thereof. Background technique [0002] CN1524929A discloses a method for reducing the cloud point of lubricating base oil by using a combined process of solvent dewaxing, hydrogenation treatment and isomerization dewaxing. The method can be used to process vacuum distillate oil of paraffin base or middle base crude oil, deasphalted oil or mixed oil raw material, and can reduce the cloud point of lubricating oil base oil to below 0 DEG C. US6468417 and US6468418 disclose the method that uses acid clay or aluminum oxide as adsorbent to reduce the cloud point of lubricating oil base oil. At present, the catalytic dewaxing or isomerization dewaxing process using a microporous molecular sieve catalyst with a pore size of 0.4-0.7 nm is an important tech...

Claims

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Application Information

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IPC IPC(8): B01J29/068
Inventor 马莉莉宋春敏蔡烈奎甄新平王延臻熊春珠段红玲王雪梅李辉
Owner PETROCHINA CO LTD
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