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Method for processing Fischer-Tropsch wax and lubricating oil base oil and its preparation method

A technology for Fischer-Tropsch wax and hydrogen oil, applied in the field of preparing lubricating base oil and lubricating base oil, can solve the problems of environmental pollution of waste solvent, loss of heavy base oil, reduction of yield of base oil, etc. Its properties are improved, the degree of isomerization is increased, and the effect of avoiding excessive lightweighting

Active Publication Date: 2017-08-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 for processing Fischer-Tropsch wax and lubricating oil base oil and its preparation method
  • Method for processing Fischer-Tropsch wax and lubricating oil base oil and its preparation method
  • Method for processing Fischer-Tropsch wax and lubricating oil base oil and its preparation method

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specific Embodiment approach

[0065] According to a preferred embodiment of the present invention, the method of the present invention comprises:

[0066] (1) In the first hydrofinishing reaction zone, Fischer-Tropsch wax is contacted with successively loaded hydrofinishing catalyst A1, hydrofinishing catalyst A2 and hydrofinishing catalyst A3, wherein the hydrofinishing catalyst A1 includes fluorine-containing , a hydrogenation catalyst of at least one additive component in boron and phosphorus, the hydrofinishing catalyst A2 includes a hydrogenation catalyst containing fluorine and / or molecular sieves, and the hydrofinishing catalyst A3 includes a hydrogenation catalyst that does not contain fluorine and does not contain Hydrogenation catalysts containing molecular sieves;

[0067] (2) contacting the product obtained in step (1) with the hydroisomerization catalyst a1 in the first wax hydroconversion reaction zone;

[0068] (3) contacting the product obtained in step (2) with the hydroisomerization cata...

Embodiment 1

[0083] In this example, a Fischer-Tropsch synthetic wax is used as a raw material, and its properties are shown in Table 1.

[0084] The catalyst of the present embodiment is prepared by the following method:

[0085] 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% .

[0086] 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.

[0087] Catalyst b is the Pt / be...

Embodiment 2

[0131] The raw material Fischer-Tropsch synthetic wax used in this example is the same as that in Example 1.

[0132] 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).

[0133] Adopt the technical process identical with embodiment 1 to process this raw material, wherein, difference is:

[0134] 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 for treating Fischer-Tropsch wax. The method comprises: sequentially contacting Fischer-Tropsch wax with a hydrofinishing catalyst A, a hydroisomerization catalyst and a hydrofinishing catalyst B to obtain wax converted into oil. The hydroisomerization catalyst includes molecular sieves containing metal active components, and along the flow direction of the Fischer-Tropsch wax, the hydrofinishing catalyst A includes hydrofinishing catalysts A1, A2 and A3 packed sequentially; The hydroisomerization catalyst comprises a hydroisomerization catalyst a and a hydroisomerization catalyst b, and the molecular sieve in the hydroisomerization catalyst b has a pore diameter larger than that of the molecular sieve in the hydroisomerization catalyst a big. The invention also discloses a method for preparing lubricating oil base oil by using the method for treating Fischer-Tropsch wax and the lubricating oil base oil prepared thereby. The lubricating oil base oil produced by the Fischer-Tropsch synthetic wax provided by the invention has the advantages of non-flocculation, high yield and low pour point.

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 Patents(China)
IPC IPC(8): C10G65/02C10G67/02C10M177/00C10M101/02
Inventor 高杰王鲁强郭庆洲李洪宝李洪辉高晓冬
Owner CHINA PETROLEUM & CHEM CORP
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