Preparation method and application of Pt-MoS2/LDHS hydrocracking catalyst

A pt-mos2, catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of short catalyst life, increased catalyst consumption, poor reproducibility, etc., to achieve optimal acceleration Effect of hydrogen process, reduction of Pt content, and improvement of service life

Inactive Publication Date: 2019-05-31
WENZHOU HONGCHENGXIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the heavy oil hydrotreating process, due to the high viscosity and high impurity content of the heavy oil, the space velocity of the heavy oil hydrotreating process is very small, so the amount of catalyst is greatly increased compared with other refining processes, and the heavy oil hydrotreating catalyst uses Short life and poor reproducibility, so it is particularly important to reduce the cost of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of nano-molybdenum disulfide: add ammonium tetrathiomolybdate with a concentration of 0.05mol / l to the solvent diethyl ether, stir evenly, then add an appropriate amount of reducing agent hydrazine hydrate, stir evenly, and configure the initial reaction mixture And transferred in the autoclave;

[0021] (2) Zn(NO 3 ) 2 and Al(NO 3 ) 3 Dissolved in water, configured as a mixed solution with a total metal particle concentration of 0.6mol / L, keeping Zn 2+ :Al 3+ The molar ratio is 2:1, drop a certain amount of alkaline solution in a constant temperature 70-80 ° C water bath, adjust the pH = 11, react for 2 hours, and age for 12 hours. During the process, a hydrotalcite-like precipitate with a layered structure is formed. , the precipitate was separated, washed three times with deionized water, and then dried at 60°C for 5 hours. Then dissolve the LDHS material in the solvent ethylene glycol, add ionic liquid 1-methyl-3-carboxyethylimidazolium tetrafl...

Embodiment 2

[0024] (1) Synthesis of nano-molybdenum disulfide by solvent method: add 0.8mol / l ammonium tetrathiomolybdate to the solvent DMF, stir evenly, then add an appropriate amount of reducing agent hydrazine hydrate, stir evenly, configure the initial reaction mixture and transfer to In a high-pressure synthesis kettle.

[0025] (2) Zn(NO 3 ) 2 and Al(NO 3 ) 3 Dissolved in water, configured as a mixed solution with a total metal particle concentration of 0.5-1mol / L, keeping Zn 2+ :Al 3+The molar ratio is 2:1, drop a certain amount of alkaline solution in a water bath with a constant temperature of 80°C, adjust the pH to 11, react for 2 hours, and age for 12 hours. Separate, wash with deionized water 2 to 3 times, and then dry at 80°C for 5 hours. Then dissolve the LDHS material in the solvent ethylene glycol, add ionic liquid or 1-ethyl-3-methylimidazolium tetrafluoroborate, stir ultrasonically for 10 minutes and then reflux at 50°C for 10h, wash after the reaction, 60°C Let ...

Embodiment 3

[0028] (1) Synthesis of nano-molybdenum disulfide by solvent method: add 0.1mol / l ammonium tetrathiomolybdate to the solvent diethyl ether, stir well, then add an appropriate amount of reducing agent hydrazine hydrate, stir well, configure the initial reaction mixture and Transfer to high pressure synthesis kettle.

[0029] (2) Functionalization of LDHS with ionic liquids: Zn(NO 3 ) 2 and Al(NO 3 ) 3 Dissolved in water, configured as a mixed solution with a total metal particle concentration of 0.5-1mol / L, keeping Zn 2+ :Al 3+ The molar ratio is 2:1, drop a certain amount of alkaline solution in a water bath with a constant temperature of 70°C, adjust the pH to 12, react for 2 hours, and age for 12 hours. During this process, a layered structure of hydrotalcite-like precipitation is formed. Separate, wash with deionized water 2-3 times, and then dry at 60°C for 8 hours. Then dissolve the LDHS material in the solvent ethylene glycol, add ionic liquid, stir ultrasonically ...

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Abstract

The invention relates to the field of hydrocracking catalysis, in particular to a preparation method of a supported Pt-MoS2 / LDHS hydrocracking catalyst. An obtained composite material has the advantages of the structure and performance of platinum-molybdenum disulfide and hydrotalcite, in a synthesis system, the vulcanization process of a vulcanizing agent and molybdate precursor is omitted, the raw materials are controlled directly, and the composite material is assisted by a solvent effect, thereby improving the dispersity of nano molybdenum disulfide, and the catalyst has good heat resistance, crushing resistance, higher cracking rate and heat stability.

Description

technical field [0001] The invention relates to the field of hydrocracking, in particular to a supported Pt-MoS prepared by using ionic liquid 2 / LDHS hydrocracking catalyst and its application. Background technique [0002] Heavy oil (such as atmospheric residue of crude oil, vacuum residue of crude oil, heavy crude oil, oil sands, synthetic heavy oil products, etc.) contains a large amount of heavy metals (such as nickel, vanadium), sulfur, nitrogen and other impurities, and The content of colloids and asphaltenes is relatively high. In order to meet the requirements of catalytic cracking feed and protect downstream catalysts, these impurities must be removed as much as possible, and hydrotreating is the most suitable process for removing the above impurities. Heavy oil hydrotreating catalysts generally include protective agents, demetallization catalysts, desulfurization catalysts, conversion catalysts, etc. according to their functions. The main function of the convers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/00B01J35/02B01J35/10B01J37/00B01J37/02B01J37/03C10G47/06C10G47/14
CPCB01J27/0515B01J35/023B01J35/1066B01J35/1071C10G45/10C10G45/52C10G2300/202C10G2300/205C10G2300/206
Inventor 叶澄
Owner WENZHOU HONGCHENGXIANG TECH
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