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Oxidation-state semi-regenerative reforming catalyst and preparation method thereof

A reforming catalyst, semi-regeneration technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. Due to the large particle size of platinum atom clusters, the effect of not easy to aggregate, high selectivity, and enhanced interaction is achieved.

Active Publication Date: 2019-07-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide an oxidized state semi-regenerative reforming catalyst and its preparation method to solve the problems in the prior art that the interaction between metal components and supports is not strong and the particle size of platinum clusters is large

Method used

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  • Oxidation-state semi-regenerative reforming catalyst and preparation method thereof
  • Oxidation-state semi-regenerative reforming catalyst and preparation method thereof

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preparation example Construction

[0029] A method for preparing a semi-regenerated reforming catalyst, comprising the steps of:

[0030] Step 1, preparing alumina carrier;

[0031] Step 2, preparing an impregnating solution, which contains a platinum compound, a rhenium compound, a competing adsorbent and a nitrogen-containing compound;

[0032] Step 3, impregnating the alumina carrier and evaporating the impregnating solution to dryness at a temperature of 50-60°C; and

[0033] Step 4, the catalyst is dried and activated.

[0034] In the preparation method of the semi-regenerated reforming catalyst of the present invention, in step 1, the carrier is preferably γ-alumina, more preferably γ-alumina prepared from high-purity aluminum hydroxide obtained by hydrolysis of aluminum alkoxide. The catalyst carrier can be shaped by the usual methods of dropping balls, rolling balls, and extruding strips. commonly used.

[0035] The preparation method of the semi-regenerative reforming catalyst of the present invent...

Embodiment 1

[0046] Get 300 grams of pseudo-boehmite powder (manufactured by Sasol Company), and 6 grams of fennel powder, and mix them evenly. Get 4 grams of nitric acid with a concentration of 65% by mass, 7 grams of acetic acid with a concentration of 36% by mass, and 210 grams of deionized water after mixing to form a peptizer, pour the peptizer into the mixed pseudoboehmite powder, and knead To be suitable for extruding, after extruding, dry at 60°C for 6 hours, dry at 120°C for 2 hours, and bake at 650°C for 4 hours in a flowing air atmosphere to obtain a strip-shaped γ-alumina carrier.

[0047] Prepare impregnating solution containing chloroplatinic acid, perrhenic acid, hydrochloric acid, and urea according to a predetermined amount, and the contents of platinum, rhenium, HCl and urea in the impregnating solution are respectively 0.25%, 0.45%, and 1.5% relative to the mass of alumina on a dry basis and 4.6%. Take the impregnating liquid to impregnate the carrier prepared in the pr...

Embodiment 2

[0049] Catalyst B was prepared according to the method of Example 1, except that the contents of platinum, rhenium, HCl and urea in the impregnating solution were 0.23%, 0.24%, 1.9% and 2.2% respectively relative to the mass of alumina on a dry basis. The liquid / solid ratio of the impregnating liquid to the carrier is 1.1, the impregnating temperature is 15°C, and the impregnating time is 0.5 hours. Specifically:

[0050] Get 300 grams of pseudo-boehmite powder (manufactured by Sasol Company), and 6 grams of fennel powder, and mix them evenly. Get 4 grams of nitric acid with a concentration of 65% by mass, 7 grams of acetic acid with a concentration of 36% by mass, and 210 grams of deionized water after mixing to form a peptizer, pour the peptizer into the mixed pseudoboehmite powder, and knead To be suitable for extruding, after extruding, dry at 60°C for 6 hours, dry at 120°C for 2 hours, and bake at 650°C for 4 hours in a flowing air atmosphere to obtain a strip-shaped γ-a...

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Abstract

The invention discloses an oxidation-state semi-regenerative reforming catalyst and a preparation method thereof. The preparation method comprises the steps that step 1, an alumina carrier is prepared, wherein alumina is gamma-alumina prepared from aluminum hydroxide prepared through hydrolysis of alkoxy aluminum; step 2, an impregnation solution is prepared, wherein the impregnation solution contains a platinum compound, a rhenium compound, a competitive adsorbent and a nitrogen-containing compound, and the nitrogen-containing compound is urea; step 3, the alumina carrier is impregnated, theimpregnation solution is dried by distillation, and the temperature of drying by distillation is 50-60 DEG C; step 4, the catalyst is dried and activated. The oxidation-state semi-regenerative reforming catalyst and the preparation method thereof have the advantages that the urea is introduced into the impregnation solution, the interaction of metal components and the carrier is enhanced, the metal components are not easy to gather, the particle sizes of platinum atom clusters of the catalyst are smaller, the occurrence of hydrogen hydrolysis side reactions during a reforming reaction is reduced, hydrogen hydrolytic byproduct methane is less, and the selectivity of product arene is high.

Description

technical field [0001] The invention relates to a semi-regenerative reforming catalyst and a preparation method thereof, in particular to an oxidized semi-regenerative reforming catalyst and a preparation method thereof. Background technique [0002] Catalytic reforming is one of the important production processes in petroleum processing, and its main purpose is to produce high-octane gasoline, BTX aromatics and cheap hydrogen. With the upgrading of gasoline and diesel quality and the rapid development of hydrogenation technology, catalytic reforming plays an increasingly important role in the refining and chemical industry. At present, the most commonly used reforming catalyst in industry is Pt-Re / Al for semi-regenerative reforming process 2 o 3 Catalyst and Pt-Sn / Al for Continuous Regenerative Reforming Process 2 o 3 . [0003] The indicators used to measure catalyst performance include activity, selectivity and stability. For reforming catalysts, the activity is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656B01J37/02C10G35/085
CPCB01J23/002B01J23/6567B01J37/0201B01J2523/00C10G35/085B01J2523/31B01J2523/74B01J2523/828
Inventor 潘晖华胡维军潘乃俊陈世安赵悦
Owner PETROCHINA CO LTD
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