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

A reforming catalyst and vulcanization-type technology, which is applied in the direction of physical/chemical process catalysts, naphtha catalytic reforming, chemical instruments and methods, etc., can solve the problems of reaction equipment corrosion, high cost and toxicity of vulcanizing agents, and achieve high activity The effect of improving stability and improving deposition dispersibility

Active Publication Date: 2018-02-09
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 preparation method of sulfurized platinum-rhenium reforming catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Prepare an aqueous solution of N-cyanoethyl-N-hydroxyethylaniline with a concentration of 0.24wt%, and adjust the pH value of the treatment solution to 8.5 with ammonia water; add carbon disulfide dropwise to the aqueous solution under stirring to prepare the treatment solution, in which carbon disulfide The mass ratio of N-cyanoethyl-N-hydroxyethylaniline is 1:2.49.

[0027] (2) Dissolve chloroplatinic acid, perrhenic acid, and hydrochloric acid in deionized water to prepare an impregnating solution containing 0.19wt% platinum, 0.38wt% rhenium, and 1.5wt% chlorine. Measure 12 milliliters of impregnation solution containing 0.19wt% platinum, 0.38wt% rhenium and 1.5wt% chlorine and pour it into a 100ml beaker, take 10g strip-shaped γ-alumina (specific surface area 235m 2 / g, pore volume 0.58ml / g) was poured into it, soaked for 3 hours, filtered, dried at 105°C for 6 hours, and calcined at 450°C for 6 hours to obtain a catalyst intermediate.

[0028] (3) Take the tre...

Embodiment 2

[0030] (1) Prepare an aqueous solution of N-cyanoethyl-N-hydroxyethylaniline with a concentration of 0.20 wt%, and adjust the pH value of the treatment solution to 9.5 with ammonia water; add carbon disulfide dropwise to the aqueous solution under stirring to obtain the treatment solution, wherein The mass ratio of carbon disulfide to N-cyanoethyl-N-hydroxyethylaniline is 1:2.50.

[0031] (2) Dissolve chloroplatinic acid, perrhenic acid and hydrochloric acid in deionized water to prepare an impregnating solution containing 0.19wt% platinum, 0.38wt% rhenium and 1.5wt% chlorine. Measure 12 milliliters of impregnation solution containing 0.19wt% platinum, 0.38wt% rhenium and 1.5wt% chlorine and pour it into a 100ml beaker, take 10g strip-shaped γ-alumina (specific surface area 235m 2 / g, pore volume 0.58ml / g) was poured into it, soaked for 3 hours, filtered, dried at 105°C for 6 hours, and calcined at 450°C for 6 hours to obtain a catalyst intermediate.

[0032] (3) Take the tre...

Embodiment 3

[0034] (1) Prepare an aqueous solution of N-cyanoethyl-N-hydroxyethylaniline with a concentration of 0.32wt%, and adjust the pH value of the treatment solution to 9.5 with ammonia water; add carbon disulfide dropwise to the aqueous solution under stirring to obtain the treatment solution, wherein The mass ratio of carbon disulfide to N-cyanoethyl-N-hydroxyethylaniline is 1:2.53.

[0035] (2) Dissolve chloroplatinic acid, perrhenic acid and hydrochloric acid in deionized water to prepare an impregnating solution containing 0.19wt% platinum, 0.38wt% rhenium and 1.5wt% chlorine. Measure 12 milliliters of impregnation solution containing 0.19wt% platinum, 0.38wt% rhenium and 1.5wt% chlorine and pour it into a 100ml beaker, take 10g strip-shaped γ-alumina (specific surface area 235m 2 / g, pore volume 0.58ml / g) was poured into it, soaked for 3 hours, filtered, dried at 105°C for 6 hours, and calcined at 450°C for 6 hours to obtain a catalyst intermediate.

[0036] (3) Take the trea...

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Abstract

The invention discloses a method for preparing a sulfurized platinum-rhenium reforming catalyst, which comprises the following steps: (1) preparing N-cyanoethyl-N-hydroxyethylaniline solution, adjusting the pH value of the solution to 8.5-11, adding (2) Immerse the alumina carrier in an aqueous solution containing platinum, rhenium, and chlorine, filter, dry, and roast to obtain a catalyst intermediate; (3) The catalyst intermediate obtained in step (2) The catalyst intermediate is sprayed with the treatment solution prepared in step (1), dried and calcined to obtain a sulfide-type platinum-rhenium reforming catalyst. The catalyst obtained by the method can directly react with the raw material oil without presulfurization before use, which reduces the start-up time and steps, and its catalytic performance and service life are both improved compared with the existing method.

Description

technical field [0001] The invention relates to a preparation method of a reforming catalyst, in particular to a preparation method of a sulfurized platinum-rhenium reforming catalyst. 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 reforming catalyst has de...

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
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