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A kind of sulfurized platinum-rhenium reforming catalyst and preparation method thereof

A reforming catalyst, sulfurized technology, applied in physical/chemical process catalysts, chemical instruments and methods, naphtha catalytic reforming, etc., can solve the problems of reaction equipment corrosion, high cost of sulfurizing agents, equipment damage safety, etc. Achieve the effect of improving activity stability and improving deposition and dispersion

Active Publication Date: 2018-10-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, the presulfidation method of reforming catalysts has the following problems: (1) The sulfidation agent added in the sulfidation process, whether it is H 2 Both S and organic sulfides are likely to cause corrosion of reaction equipment, causing equipment damage and potential safety hazards; (2) special pre-sulfurization equipment needs to be set up on industrial reforming units; (3) the vulcanizing agent used is flammable and toxic, and the vulcanization process Pollution to the environment; (4) Higher cost of vulcanizing agent; (5) Prolonged start-up time

Method used

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  • A kind of sulfurized platinum-rhenium reforming catalyst and preparation method thereof
  • A kind of sulfurized platinum-rhenium reforming catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] (1) Prepare an aqueous solution of N-cyanoethylaniline with a concentration of 0.18wt%, and adjust the pH value of the impregnation solution to 8.5 with ammonia water; add carbon disulfide dropwise to the aqueous solution under stirring to obtain a treatment solution, wherein carbon disulfide and N-cyanoethylaniline The mass ratio of base aniline is 1:1.95.

[0028] (2) Dissolve chloroplatinic acid and perrhenic acid in deionized water to prepare an impregnation solution containing 0.29wt% platinum and 0.58wt% rhenium; measure 8ml of the treatment solution in step (1) and pour it into a 100ml beaker Among them, take 10g strip-shaped γ-alumina (specific surface area 235m 2 / g, pore volume 0.58ml / g) was poured into it, immersed for 3 hours, filtered, dried at 100°C for 2 hours to obtain a dry sample, and the impregnation solution containing 0.29wt% platinum and 0.58wt% rhenium was saturated and sprayed The sample was dried, dried at 112°C for 6 hours, and calcined at 450°...

Embodiment 2

[0031] (1) Prepare an aqueous solution of N-cyanoethylaniline with a concentration of 0.18wt%, and adjust the pH value of the impregnation solution to 9.5 with ammonia water; add carbon disulfide dropwise to the aqueous solution under stirring to obtain a treatment solution, wherein carbon disulfide and N-cyanoethylaniline The mass ratio of base aniline is 1:1.2.05.

[0032] (2) Dissolve chloroplatinic acid and perrhenic acid in deionized water to prepare an impregnation solution containing 0.29wt% platinum and 0.58wt% rhenium; measure 9.5ml of the treatment solution in step (1) and pour it into a 100ml beaker Among them, take 10g strip-shaped γ-alumina (specific surface area 235m 2 / g, pore volume 0.58ml / g) was poured into it, soaked for 4 hours, filtered, dried at 105°C for 3 hours to obtain a dry sample, and the impregnation solution containing 0.29wt% platinum and 0.58wt% rhenium was saturated and spray-dried Like this, dry at 112°C for 5 hours and calcinate at 480°C for ...

Embodiment 3

[0035] (1) Prepare an aqueous solution of N-cyanoethylaniline with a concentration of 0.18wt%, and adjust the pH value of the impregnation solution to 10 with ammonia water; add carbon disulfide dropwise to the aqueous solution under stirring to obtain a treatment solution, wherein carbon disulfide and N-cyanoethylaniline The mass ratio of base aniline is 1:2.03.

[0036] (2) Dissolve chloroplatinic acid and perrhenic acid in deionized water to prepare an impregnation solution containing 0.29wt% platinum and 0.58wt% rhenium; measure 11ml of the treatment solution in step (1) and pour it into a 100ml beaker Among them, take 10g strip-shaped γ-alumina (specific surface area 235m 2 / g, pore volume 0.58ml / g) was poured into it, immersed for 3 hours, filtered, dried at 100°C for 2 hours to obtain a dry sample, and the impregnation solution containing 0.29wt% platinum and 0.58wt% rhenium was saturated and spray-dried In the same way, it was dried at 112°C for 6 hours and calcined a...

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Abstract

The invention discloses a preparation method of a vulcanized platinum-rhenium reforming catalyst. The method includes the steps of: (1) preparing an N-cyanoethylaniline solution, using lye to adjust the pH value of the solution to 8.5-11, adding carbon disulfide dropwise into the N-cyanoethylaniline solution to obtain a treatment solution; (2) impregnating an alumina carrier in the treatment solution prepared by step (1), then carrying out filtering and drying, spraying an impregnation solution containing platinum and rhenium, and conducting drying and roasting to obtain a catalyst intermediate; and (3) impregnating the obtained catalyst intermediate in a chlorine-containing solution, and carrying out filtering, drying and roasting to obtain the vulcanized platinum-rhenium reforming catalyst. The catalyst obtained by the method can directly react with raw oil without prevulcanization before use, the work time and steps are reduced, and the catalytic performance and service life of the catalyst are improved than the prior art.

Description

technical field [0001] The invention relates to a reforming catalyst and a preparation method thereof, in particular to a sulfurized platinum-rhenium reforming catalyst and a preparation method thereof. Background technique [0002] Catalytic reforming is an important process for the production of high-octane gasoline components and aromatics. At the same time, the by-product cheap hydrogen is used for oil hydrofinishing, upgrading, cracking, etc. In recent years, with the increasing social demand for reforming products, the production capacity of catalytic reforming units in the world has increased year by year, among which semi-regenerative reforming units occupy a very important position. The semi-regenerative reforming catalyst uses platinum-rhenium catalyst, which is characterized by good stability and long-term stable operation. The catalyst needs to be pre-sulfurized and impregnated after being activated and reduced before use. [0003] The semi-regenerative reformi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/13B01J27/045C10G35/09
Inventor 宋丽芝乔凯王海波勾连科薛冬
Owner CHINA PETROLEUM & CHEM CORP