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Catalyst for dewaxing lubricating oil base oil produced by Fischer-Tropsch synthetic wax and preparation method and application of catalyst

A technology for lubricating base oil and Fischer-Tropsch synthetic wax, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unsatisfactory turbidity reduction effect and blank catalyst for lubricating base oil dewaxing

Pending Publication Date: 2020-12-01
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a lubricating base oil dewaxing catalyst used for Fischer-Tropsch wax production in order to overcome the unsatisfactory effect of reducing turbidity in the prior art and the absence of a lubricating base oil dewaxing catalyst for Fischer-Tropsch wax production. Wax catalyst and its preparation method and use

Method used

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  • Catalyst for dewaxing lubricating oil base oil produced by Fischer-Tropsch synthetic wax and preparation method and application of catalyst
  • Catalyst for dewaxing lubricating oil base oil produced by Fischer-Tropsch synthetic wax and preparation method and application of catalyst
  • Catalyst for dewaxing lubricating oil base oil produced by Fischer-Tropsch synthetic wax and preparation method and application of catalyst

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preparation example Construction

[0051] According to the method for preparing catalyst of the present invention, preferably, in step (1), the process of said surface passivation-shrinkage cavity treatment comprises:

[0052] (a) mixing the passivation-shrinkage agent with a solvent to prepare the first solution;

[0053] (b) contacting the acidic molecular sieve with the first solution at 20-90°C, followed by the first drying and the first calcination;

[0054] Preferably, the conditions for the first drying include: the temperature is 40-120°C, and the time is 1-12h;

[0055] The conditions for the first calcination include: the temperature is 200-600°C, and the time is 1-12h.

[0056] As long as the purpose of dissolving the passivation-shrinker agent can be achieved, the solvent can be selected from solvents known in the art. Preferably, the solvent is selected from water, methanol, ethanol, low-carbon (carbon number≤10) alkanes, such as butane, n-pentane, isopentane, n-heptane, n-hexane, etc.

[0057] ...

Embodiment 1

[0093](1) Mix 1.78g tetraethyl orthosilicate and 100mL n-hexane evenly, add 20g H-type SAPO-11 molecular sieve (average pore size is 0.6nm) to the obtained solution, stir at 70°C for 6h, then heat up to 90°C and evaporate Dry solvent. The obtained powder was dried in an oven at 120° C. for 4 hours, and then transferred to a muffle furnace for calcination at 550° C. for 4 hours to obtain a modified molecular sieve with an average pore size of 0.5 nm.

[0094] (2) Evenly mix the modified molecular sieve with 40g of alumina and 1.2g of scallop powder, then add a solution consisting of 1.8g of nitric acid and 42g of deionized water, knead in a kneader and extrude into a clover in an extruder Type, the strip obtained was dried at 120°C for 8h and calcined at 500°C for 6h to obtain the carrier.

[0095] (3) Dissolve 0.95g of chloroplatinic acid completely in 36mL of deionized water, add the obtained solution to the carrier described in step (2), then dry in an oven at 120°C for 12h...

Embodiment 2

[0097] (1) Mix 1.5g methyl silicone oil and 100mL n-heptane evenly, add 20g H-type mercerized molecular sieve (average pore size: 0.7nm) to the resulting solution, stir at 50°C for 8h, then heat up to 90°C and evaporate the solvent to dryness. The obtained powder was dried in an oven at 120 °C for 4 h, and then transferred to a muffle furnace for calcination at 550 °C for 4 h. Repeat the above steps once to obtain a modified molecular sieve with an average pore size of 0.4 nm.

[0098] (2) The modified molecular sieve is uniformly mixed with 30g aluminum oxide and 1g scallop powder, then added a solution composed of 2g nitric acid and 35g deionized water, kneaded in a kneader and extruded into a bar shape in an extruder, The strip obtained was dried at 120° C. for 8 hours, and calcined at 500° C. for 6 hours to obtain a carrier.

[0099] (3) Dissolve 0.44g tetraammineplatinum dichloride completely in 30mL deionized water, drop the obtained solution into the carrier described ...

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Abstract

The invention relates to the field of catalytic dewaxing, and discloses a catalyst for dewaxing lubricating oil base oil produced by Fischer-Tropsch synthesis wax and a preparation method and application of the catalyst. Based on the total weight of the catalyst, the catalyst comprises the following components in percentage by weight: 0.1-5% of a metal active component; 9%-90% of a modified molecular sieve; 8%-90% of aluminum oxide, wherein the metal active component is Pt and / or Ni; the modified molecular sieve is a product obtained after surface passivation-shrinkage treatment of an acidic molecular sieve, and the acidic molecular sieve is selected from at least one of a ZSM-5 molecular sieve, a ZSM-22 molecular sieve, a ZSM-48 molecular sieve, an SAPO-11 molecular sieve and a mercerizing molecular sieve. The acidic active site on the outer surface of the catalyst is passivated, and the micro-pore opening of the molecular sieve is finely adjusted so that the cloud point of the base oil product can be significantly reduced while the liquid yield is not reduced.

Description

technical field [0001] The invention relates to the field of catalytic dewaxing, in particular to a catalyst for dewaxing lubricating oil base oils produced by Fischer-Tropsch synthetic waxes, a preparation method and application thereof. Background technique [0002] Cloud point is an important low temperature performance index of lubricating oil. There are two main types of existing turbidity reducing technologies: (1) physical method of adding turbidity reducing agent (generally organic polymer) or solvent dewaxing; (2) chemical method of catalytic dewaxing. The solvent dewaxing method in the former has been gradually eliminated due to the backward process and high pollution. The actual effect of the turbidity reducer is closely related to the properties of the base oil. The effect on the base oil of petroleum-based lubricating oil is acceptable. Fischer-Tropsch wax-based lubricating oil base oils dominated by straight-chain alkanes are not compatible and effective. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J29/22B01J29/46B01J29/74B01J35/10C10G73/02
CPCB01J29/85B01J29/22B01J29/46B01J29/7484C10G73/02B01J2229/18B01J35/643B01J35/615
Inventor 李浩李景朱加清赵效洪王向辉艾军
Owner CHNA ENERGY INVESTMENT CORP LTD
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