Method of treating Fischer-Tropsch wax, lubricant base oil and preparation method of same

A technology of Fischer-Tropsch wax and hydrogen oil, which is applied in the preparation of lubricating oil base oil and the field of lubricating oil base oil, can solve the problems of heavy base oil loss, waste solvent environmental pollution, base oil yield reduction, etc., and achieve isomerization The effect of increasing the degree, avoiding excessive light weight, and increasing the yield

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above method can obtain lubricating oil base oil with high viscosity index after Fischer-Tropsch wax is processed, but the problem of existence is that the lubricating oil base oil obtained usually has a large molecular weight, high carbon number, and low degree of branching in the base oil. Severe flocculation due to low paraffin
[0006] In view of this problem, if the method of deep distillation is adopted, there are technical difficulties, and it will lead to the loss of heavy base oil; if the method of solvent dewaxing is adopted, there will be problems such as difficulty in solvent selection and environmental pollution caused by waste solvents. ; The method of catalytic dewaxing can convert macromolecular compounds into small molecular hydrocarbons, but this will greatly reduce the yield of base oil

Method used

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  • Method of treating Fischer-Tropsch wax, lubricant base oil and preparation method of same
  • Method of treating Fischer-Tropsch wax, lubricant base oil and preparation method of same
  • Method of treating Fischer-Tropsch wax, lubricant base oil and preparation method of same

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specific Embodiment approach

[0058] According to a preferred embodiment of the present invention, the method of the present invention comprises:

[0059] (1) Fischer-Tropsch wax is contacted with hydrotreating catalyst A in the first hydrotreating reaction zone;

[0060] (2) contacting the product obtained in step (1) with the hydroisomerization catalyst a1 in the first wax hydroconversion reaction zone;

[0061] (3) contacting the product obtained in step (2) with the hydroisomerization catalyst a2 in the second wax hydroconversion reaction zone;

[0062] (4) contacting the product obtained in step (3) with the hydroisomerization catalyst b in the third wax hydroconversion reaction zone;

[0063] (5) In the second hydrofinishing reaction zone, the product obtained in step (4) is contacted with hydrofinishing catalyst B to obtain wax converted into oil.

[0064] In another aspect, the present invention provides a method for preparing lubricating oil base oil, the method comprising converting the wax obt...

Embodiment 1

[0074] In this example, a Fischer-Tropsch synthetic wax is used as a raw material, and its properties are shown in Table 1.

[0075] The catalyst of the present embodiment is prepared by the following method:

[0076]Catalyst a1 adopts the catalyst prepared by the embodiment 1 in CN101942320A with platinum as an active component loaded on the ZSM-22 molecular sieve (molecular sieve aperture is 0.55nm), wherein based on the catalyst total amount, the mass fraction of platinum metal is 0.35% .

[0077] Catalyst a2 is prepared according to the embodiment 6 in CN1382526A with platinum as the catalyst that the active component is loaded on the SAPO-11 (molecular sieve aperture is 0.60nm) molecular sieve / alumina carrier, wherein with catalyst total amount as benchmark, platinum metal The mass fraction is 0.3%, and the rest is carrier. Based on the carrier, the mass fraction of SAPO-11 molecular sieve in the carrier is 75%, and the rest is alumina.

[0078] Catalyst b is the Pt / bet...

Embodiment 2

[0122] The raw material Fischer-Tropsch synthetic wax used in this example is the same as that in Example 1.

[0123] The preparation method of the catalyst used in this example is similar to that in Example 1, except that the molecular sieve in the hydroisomerization catalyst a1 of this example is MCM-22 molecular sieve (the pore size of the molecular sieve is 0.55nm).

[0124] Adopt the technical process identical with embodiment 1 to process this raw material, wherein, difference is:

[0125] The catalyst loading volume ratio of the first wax hydroconversion reaction zone 2, the second wax hydroconversion reaction zone 3 and the third wax hydroconversion reaction zone 4 is 5:3:2, and the operating conditions are shown in Table 14. See Table 15 for the material balance after separation in distillation zone 6. The properties of the lubricating base oil obtained are shown in Table 16. Moreover, it can be seen with the naked eye that the lubricating base oil obtained by the me...

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Abstract

The invention discloses a method of treating Fischer-Tropsch wax, including the following steps: 1) successively contacting the Fischer-Tropsch wax with a hydrofining catalyst A, a hydroisomerization catalyst and a hydrofining catalyst B to obtain oil converted and generated from wax. A carrier of the hydroisomerization catalyst includes a molecular sieve. In the flowing direction of the Fischer-Tropsch wax, the hydroisomerization catalyst comprises a hydroisomerization catalyst A and a hydroisomerization catalyst B, wherein the pore diameter of the molecular sieve in the hydroisomerization catalyst B is larger than that in the hydroisomerization catalyst A. The invention also discloses a method of preparing lubricant base oil through the method of treating the Fischer-Tropsch wax and the lubricant base oil prepared through the method. The lubricant base oil is free of flocculation and is high in yield.

Description

technical field [0001] The invention relates to a method for processing Fischer-Tropsch wax, a method for preparing lubricating oil base oil and a lubricating oil base oil. Background technique [0002] In the Fischer-Tropsch process, synthesis gas made from natural gas is converted under the action of a catalyst to generate Fischer-Tropsch synthesis products including gaseous hydrocarbons, liquid hydrocarbons, oxides and solid Fischer-Tropsch waxes. Among them, Fischer-Tropsch wax has become an ideal raw material for the production of lubricating oil base oil because it does not contain sulfur, nitrogen or metal impurities. [0003] CN101230290A discloses a kind of producing solvent oil, lubricating oil base oil and heavy wax from Fischer-Tropsch synthetic wax, comprising: a) Fischer-Tropsch synthetic wax is contacted with hydrofinishing catalyst in hydrofinishing reaction zone 1, and in distillation zone 1 separating the product to obtain two fractions with an end boiling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04C10G67/02C10M177/00
Inventor 高杰王鲁强郭庆洲黄卫国李洪辉高晓冬
Owner CHINA PETROLEUM & CHEM CORP
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