A method for producing lubricating base oil by combining catalyst and Fischer-Tropsch wax modification

A combination catalyst and catalyst technology, applied in the direction of chemical instruments and methods, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve the problems of reducing interaction, mesopores without structure, etc. coagulation effect

Active Publication Date: 2020-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The seed crystal selected in this invention is a microporous molecular sieve, which is added to the preparation system after silanization, and its hydrophobicity is used to increase its effect on the hydrophobic end of the surfactant micelle, thereby reducing the interaction between the two directing agents. However, the formed mesopores still do not have a regular structure, and whether the addition of seed crystals reduces the amount of templating agent has not been reported.

Method used

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  • A method for producing lubricating base oil by combining catalyst and Fischer-Tropsch wax modification
  • A method for producing lubricating base oil by combining catalyst and Fischer-Tropsch wax modification
  • A method for producing lubricating base oil by combining catalyst and Fischer-Tropsch wax modification

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preparation example Construction

[0045] In the present invention, the mother liquor after crystallization can be prepared according to conventional methods in the art, for example, when the twelve-membered ring silicon-alumina molecular sieve is ZSM-12 molecular sieve, the preparation method of the mother liquor after crystallization can refer to Literature SrikantGopal et al., Microporous and Mesoporous Materials 49 (2001) 149-156. When the ten-membered ring silica-alumina molecular sieve is ZSM-22 molecular sieve, the preparation method of the crystallized mother liquor can refer to the literature O. Muraza et al., Microporous and Mesoporous Materials 206 (2015) 136-143. In one embodiment, the preparation process of the crystallized mother liquor includes: preparing a silicon-containing solution, an aluminum-containing solution, and an alkaline liquid, mixing the above-mentioned liquids to form a gel, and then performing crystallization at a certain temperature.

[0046] In the combined catalyst of the pres...

preparation example 1

[0068] (1) Preparation of crystallized mother liquor

[0069] Take 38.5mL containing 40% by weight of SiO 2 Silica sol, 1.48 grams of analytically pure sodium aluminate, and 17.5 mL of tetraethylammonium hydroxide (40% by weight) were used for later use. Mix tetraethylammonium hydroxide, sodium aluminate and 37 grams of deionized water, then add silica sol, stir for 1 hour, then transfer to a reaction kettle, and crystallize at 160°C for 132 hours.

[0070] (2) Preparation of filter cake

[0071] Filter the crystallized mother liquor prepared in step (1), and continue suction filtration for 5 minutes when there is no filtrate on the filter cake. The filter cake F-1 obtained has a dry basis content of 11.2 %, the silica / alumina molar ratio is 40.6.

[0072] (3) Preparation of molecular sieve precursor

[0073] The filter cake F-1 was raised from room temperature to 450° C. at a heating rate of 25° C. / min, and kept at a constant temperature for 4 hours. During the heating p...

preparation example 2

[0083] (1) Preparation of crystallized mother liquor

[0084] 6.05 mL of white carbon black, 0.51 g of analytically pure aluminum sec-butoxide, and 18.4 mL of tetraethylammonium hydroxide (40% by weight) were taken for use. Mix 15 grams of deionized water with tetraethylammonium hydroxide, aluminum sec-butoxide and 37 grams of deionized water, then add white carbon black, stir for 1 hour, then transfer to a reaction kettle, and crystallize at 140°C for 120 hours.

[0085] (2) Preparation of filter cake

[0086] Filter the crystallized mother liquor prepared in step (1), and continue suction filtration for 5 minutes when there is no filtrate on the filter cake. The filter cake F-2 obtained has a dry basis content of 11.2 %, the silica / alumina molar ratio is 40.6.

[0087] (3) Preparation of molecular sieve precursor

[0088] The filter cake F-2 was raised from room temperature to 450° C. at a heating rate of 25° C. / minute, and kept at a constant temperature for 4 hours. Dur...

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Abstract

The invention relates to the field of modification of Fischer-Tropsch, and particularly relates to a composite catalyst and a method of modifying Fischer-Tropsch wax to produce lubricant base oil. Thecomposite catalyst includes a first catalyst and a second catalyst. The first catalyst contains twelve-membered ring silicon-aluminum molecular sieve and the second catalyst contains a ten-membered ring silicon-aluminum molecular sieve, wherein the molar ratio of silicon oxide to aluminum oxide in the ten-membered ring silicon-aluminum molecular sieve and / or twelve-membered ring silicon-aluminummolecular sieve is 120-300. The molecular sieves contain mesoporous structures; a closed hysteresis loop exists at the position P / P0 = 0.4-0.99 on a low temperature nitrogen adsorption-desorption curve, the start position of the closed hysteresis loop being at the position P / P0 = 0.4-0.7. The composite catalyst is used for modifying Fischer-Tropsch wax for producing lubricant base oil, thus achieving great pour point declining effect. The lubricant base oil is high in yield and viscosity index.

Description

technical field [0001] The invention relates to the field of Fischer-Tropsch wax modification, in particular to a method for producing lubricating base oil by combining a catalyst and Fischer-Tropsch wax modification. Background technique [0002] Molecular sieve material has high acidity and high specific surface area, and is an excellent acidic catalyst. At the same time, molecular sieve materials have strong chemical stability and hydrothermal stability, and are difficult to be destroyed by corrosion and dissolution of reactants. Compared with commonly used homogeneous catalysts, molecular sieve material catalysts can be directly reused without separation, and will not pollute the environment and products. The specific surface area and other pore structure parameters of molecular sieve materials have an important influence on the catalytic performance of molecular sieves. Therefore, the preparation of molecular sieves with special channels is an important research direct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/068C10G47/16C10M177/00
Inventor 毕云飞夏国富杨清河龙湘云黄卫国郭庆洲方文秀
Owner CHINA PETROLEUM & CHEM CORP
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