Hydroisomerization catalyst and its preparation method and Fischer-Tropsch synthesis wax modification method for producing lubricating oil base oil

A technology for hydroisomerization and catalyst, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as product yield decline

Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many reports about isomerization dewaxing catalysts. For example, U.S. patent applications US4518485, US5990371, US5135638, US4419420, US5110445, etc. have all reported the production of lubricating oil base oils involving isomerization dewaxing technology, and the acid components used therein mainly include MOR, ZSM-22, ZSM-23, ZSM-48, SAPO-11, SAPO-31, SAPO-41, Nu-10 and KZ-2, etc., these materials can make paraffin isomerization to a certain extent reaction, but due to the characteristics of its own molecular sieve, only a part of the reactants can undergo isomerization reaction, while the rest can undergo cleavage reaction, and the greater the degree of isomerization, the more cleavage reactions will occur, which will reduce the yield of the product

Method used

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  • Hydroisomerization catalyst and its preparation method and Fischer-Tropsch synthesis wax modification method for producing lubricating oil base oil
  • Hydroisomerization catalyst and its preparation method and Fischer-Tropsch synthesis wax modification method for producing lubricating oil base oil
  • Hydroisomerization catalyst and its preparation method and Fischer-Tropsch synthesis wax modification method for producing lubricating oil base oil

Examples

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preparation example Construction

[0041] In the present invention, the mother liquor after crystallization can be prepared according to conventional methods in the art, for example, when the ten-membered ring silica-alumina molecular sieve is ZSM-22 molecular sieve, the preparation method of the mother liquor after crystallization can refer to the literature O. Muraza et al., Microporous and Mesoporous Materials 206 (2015) 136-143; when the ten-membered ring silica-alumina molecular sieve is ZSM-48 molecular sieve, the preparation method of the mother liquor after crystallization can refer to the literature P. Me´ riaudeau et al / Journal of Catalysis, 1999 (185), 435–444, or refer to US Patent Application US5961951. In one embodiment, the preparation process of the crystallization mother liquor of the ten-membered ring silica-alumina molecular sieve includes: preparing a silicon-containing solution, an aluminum-containing solution, and an alkaline liquid, mixing the above-mentioned liquids to form gels, and the...

preparation example 1

[0074] (1) Preparation of crystallized mother liquor

[0075] Get 45 grams of white carbon black, 1.25 grams of analytically pure Al 2 (SO 4 ) 3 18H 2 O, 1.88 grams of analytically pure NaOH and 39.3 grams of hexamethylenediamine are ready for use. Mix hexamethylenediamine with silica and 200 g of deionized water, NaOH and Al 2 (SO 4 ) 3 18H 2 O and 272 grams of deionized water were mixed, and then the two solutions were mixed, stirred for 1 hour, then transferred to a reaction kettle, and crystallized at 160° C. for 72 hours.

[0076] (2) Preparation of filter cake

[0077] 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 30.2.

[0078] (3) Preparation of molecular sieve precursor

[0079] The filter cake F-1 was raised from room temperature to 450° C. at a heating ra...

preparation example 2

[0086] The ZSM-48 molecular sieve was prepared according to the method of Preparation Example 1, except that in step (3), the filter cake F-1 was raised from room temperature to 350°C at a rate of 5°C / min, and kept at a constant temperature for 14 hours. During the heating process, the roasting furnace is a closed roasting furnace to obtain the molecular sieve precursor C-2. The finished product H-2 of ZSM-48 molecular sieve was obtained.

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Abstract

The invention relates to the field of modifying Fischer-Tropsch synthetic wax and particularly relates to a hydroisomerization catalyst, a preparation method thereof, and a method of modifying Fischer-Tropsch synthetic wax for producing lubricant base oil. The catalyst comprises a supporter and an active metal component supported by the supporter. The supporter contains a ten-membered silicon-aluminum molecular sieve, of which the molar ratio of silicon oxide to aluminum oxide is 120-300. The supporter has mesoporous structure; a closed hysteresis loop exists at the position P / P0 = 0.4-0.99 ona 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 hydroisomerization catalyst is used for modifying Fischer-Tropsch synthetic wax for producing lubricant base oil, wherein a target product has high viscosity index, low pour point, and high yield.

Description

technical field [0001] The invention relates to the field of Fischer-Tropsch synthesis wax modification, in particular to a hydroisomerization catalyst and a preparation method thereof, and a method for producing lubricating oil base oil through modification of Fischer-Tropsch synthesis wax. Background technique [0002] Raw materials rich in long-chain alkanes mainly include hydrocracking tail oil, vegetable oil, Fischer-Tropsch synthetic wax and waste lubricating oil, etc., which have high freezing points and poor low-temperature fluidity. As the ambient temperature decreases, the fluidity of the oil will deteriorate, or even solidify, thereby blocking the container and pipeline and interrupting the oil supply to the engine. At present, there are many methods to solve various problems caused by low freezing point of waxy oil, mainly including solvent dewaxing, catalytic dewaxing and isomerization dewaxing. [0003] Solvent dewaxing is to use the solvent properties of wax ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/74C10G47/18C10M177/00
Inventor 毕云飞夏国富李明丰杨清河张乐黄卫国郭庆洲王鲁强方文秀
Owner CHINA PETROLEUM & CHEM CORP
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