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A semi-regenerative reforming catalyst containing rare earth and its preparation method

A reforming catalyst, semi-regenerated technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy aggregation of metal components and weak interaction between metal components and supports , to achieve the effect of not easy to aggregate, high selectivity, and less methane

Active Publication Date: 2021-11-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a rare earth-containing semi-regenerative reforming catalyst and its preparation method to solve the problems in the prior art that the interaction between the metal component and the carrier in the catalyst is not strong and the metal component is easy to aggregate

Method used

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  • A semi-regenerative reforming catalyst containing rare earth and its preparation method
  • A semi-regenerative reforming catalyst containing rare earth and its preparation method

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preparation example Construction

[0031] The present invention also provides a method for preparing a polymetallic semi-regenerative reforming catalyst, comprising the steps of:

[0032] Step 1, preparing an alumina carrier, the alumina is γ-alumina prepared from aluminum hydroxide obtained by hydrolysis of aluminum alkoxide;

[0033] Step 2, preparing an impregnation solution, the impregnation solution contains platinum compounds, rhenium compounds, light rare earth compounds, competitive adsorbents and nitrogen-containing compounds; the nitrogen-containing compounds are urea;

[0034] Step 3, impregnating the alumina carrier and evaporating the impregnating solution to dryness at a temperature of 50-60°C; and

[0035] Step 4, the catalyst is dried and activated.

[0036] 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 ...

Embodiment 1

[0049] 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.

[0050] The impregnation solution containing chloroplatinic acid, ammonium perrhenate, cerous chloride, hydrochloric acid and urea was prepared according to the predetermined amount, and the content of platinum, rhenium, cerium, HCl and urea in the impregnation solution were respectively relative to the mass of alumina on a dry basis 0.23%, 0.46%, 0.44%, 1.2% and 4.6%. The impregnation solution was ...

Embodiment 2

[0052] Catalyst B was prepared according to the method of Example 1, except that the rare earth compound in the impregnation solution was europium nitrate, and the platinum content, rhenium content, europium content, HCl content and urea content in the impregnation solution were respectively 0.23% relative to the dry basis alumina mass , 0.24%, 0.21%, 1.6% and 3.3%. The liquid / solid ratio of the impregnating liquid to the carrier is 1.1, the impregnating temperature is 35° C., and the impregnating time is 1 hour. Specifically:

[0053] 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 ho...

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Abstract

The invention discloses a rare earth-containing semi-regenerated reforming catalyst and a preparation method thereof. The preparation method specifically includes: step 1, preparing an alumina carrier, and the alumina is gamma prepared from aluminum hydroxide obtained by hydrolysis of alkoxy aluminum ‑Alumina; step 2, preparing impregnating solution, which contains platinum compound, rhenium compound, light rare earth compound, competing adsorbent and nitrogen-containing compound; the nitrogen-containing compound is urea; step 3, impregnating alumina carrier and steaming Drying the impregnating solution, evaporating to dryness at a temperature of 50-60°C; and step 4, drying and activating the catalyst. The catalyst is used for catalytic reforming reaction of hydrocarbons and has good activity and selectivity.

Description

technical field [0001] The invention relates to a semi-regenerated reforming catalyst and a preparation method thereof, in particular to a semi-regenerated reforming catalyst containing light rare earth 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/10B01J37/18C10G49/06
CPCB01J27/10B01J37/18C10G49/06
Inventor 潘晖华陈世安赵悦胡维军潘乃俊
Owner PETROCHINA CO LTD
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