Bimetal reforming catalyst and its preparing process

A technology for reforming catalysts and catalysts, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve problems such as increased carbon deposition, reduced hydrogen-oil ratio, and reduced hydrogen partial pressure.

Inactive Publication Date: 2003-01-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reduction of the hydrogen-oil ratio means that the reaction hydrogen partial pressure is reduced when the reaction pressure is constant. Although it is beneficial to the aromatization reaction, the low hydrogen partial pressure will easily increase the carbon deposition of the catalyst.
In addition, increasing the space velocity and increasing the amount of feed will also speed up the coking speed of the catalyst, and the amount of carbon deposit will increase accordingly.

Method used

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  • Bimetal reforming catalyst and its preparing process
  • Bimetal reforming catalyst and its preparing process

Examples

Experimental program
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Effect test

example 1

[0029] In this example, the co-impregnation method was used to prepare the catalyst.

[0030] Weigh 60 grams of bar-shaped γ-Al 2 o 3 Carrier (prepared with SB oxy-alumina powder produced by Germany Condea Company), chloroplatinic acid (Changling Catalyst Factory, analytically pure), perrhenic acid, phosphoric acid and hydrochloric acid (analytical pure) were made into impregnating solution, and the impregnating solution was It contains 0.22% of Pt, 0.50% of Re, 0.2% of P, and 1.8% of Cl (relative to the weight of alumina on a dry basis), and the liquid-solid volume ratio is 1.9. After immersing at room temperature for 24 hours, filter, dry at 120°C for 12 hours, and activate it by roasting for 4 hours in dry air at 500°C and an air-to-agent volume ratio of 700, then use H at 480°C and an air-to-agent volume ratio of 500 2 Reduction for 4 hours to prepare phosphorus-containing Pt-Re / γ-Al 2 o 3 Catalyst B. Then add 0.10% by weight (to catalyst weight) of hydrogen sulfide i...

example 2

[0032] Get the γ-Al described in 60 grams of example 1 2 o 3For the carrier, use a predetermined amount of chloroplatinic acid (analytical pure), perrhenic acid (analytical pure), phosphoric acid (analytical pure) and hydrochloric acid (analytical pure) to prepare an impregnation solution, which contains Pt0.22%, Re0. 58%, P0.8%, Cl1.8% (all relative to the weight of alumina on a dry basis), and the liquid-solid volume ratio is 1.9. After immersing at room temperature for 24 hours, filter, dry at 120°C for 12 hours, activate for 4 hours in dry air at 500°C, and the volume ratio of gas to agent is 700, H 2 Catalyst C was obtained by reducing for 4 hours at a temperature of 480°C and an air-to-agent volume ratio of 500. at 425°C H 2 The stream was presulfided by adding 0.10% (to catalyst weight) hydrogen sulfide. The composition of the catalyst is shown in Table 1, and the physicochemical properties are shown in Table 2.

example 3

[0034] The catalyst was prepared by stepwise impregnation.

[0035] Get the γ-Al described in 60 grams of example 1 2 o 3 The carrier is prepared with a predetermined amount of phosphoric acid to make an impregnation solution, so that the impregnation solution contains 2.0% phosphorus P (relative to the weight of alumina on a dry basis), and the liquid-solid ratio is 1.5. After soaking at room temperature for 24 hours, filter, dry at 120°C for 12 hours, and bake at 650°C for 4 hours. Then use a predetermined amount of chloroplatinic acid (analytical pure), perrhenic acid (analytical pure), hydrochloric acid (analytical pure) to make an impregnation solution, so that it contains Pt0.22%, Re0.56%, Cl1.8% (relatively Based on the weight of alumina on a dry basis), the liquid-solid volume ratio is 1.5. After impregnating at room temperature for 24 hours, filter, dry at 120°C for 12 hours, and activate by roasting for 4 hours at 500°C in dry air with an air-agent volume ratio of...

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Abstract

A reforming bimetal catalyst for gasoline fraction contains VIII-family metal (0.1-1.0 wt.%), VIIB-family metal (0.1-1.0), phosphorus (0.1-5.0), chlorine (0.6-3.0) and gamma-Al2O3 as carrier (90-99.1). Its advantages are low carbon depositing speed, high stability of activity and high selectivity of arylhydrocarbon.

Description

[0001] Technical Field The present invention relates to a naphtha reforming catalyst containing bimetallic components and a preparation method thereof, specifically, a modified platinum-rhenium 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 from naphtha fractions. At the same time, the cheap hydrogen produced by the reforming process is also the main source of hydrogen for hydrogen processing units. In recent years, with the increasing social demand for reformed products, the production capacity of catalytic reforming units in the world has increased year by year, among which semi-regenerative reforming units still occupy a dominant position. Mass production has been widely used. [0003] At present, the semi-regenerative reforming catalyst commonly used in industry is a platinum-rhenium bimetallic catalyst. Although the addition of rhenium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/14B01J37/00C10G35/085
Inventor 臧高山孙作霖张大庆王丽新陈志祥
Owner CHINA PETROLEUM & CHEM CORP
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