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Petroleum naphtha reforming catalyst and preparation method thereof

A reforming catalyst and catalyst technology, applied in the direction of naphtha catalytic reforming, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problems of lower reforming product liquid yield, low catalyst activity, etc., and achieve high liquid Yield and Aromatics Selectivity, Effect of High Surface Area

Active Publication Date: 2008-06-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the acidity is too strong, the hydrocracking activity of the catalyst is strong, and the liquid yield of the reformed product decreases; if the acidity is too weak, the activity of the catalyst is low

Method used

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  • Petroleum naphtha reforming catalyst and preparation method thereof
  • Petroleum naphtha reforming catalyst and preparation method thereof
  • Petroleum naphtha reforming catalyst and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0016] The preparation method of catalyst provided by the invention comprises the steps:

[0017] (1) Preparation of carrier: mix pseudo-boehmite and water evenly, add peptizer to obtain aluminum sol, then add complexing agent to fully react to obtain alumina gel, dry and roast the gel to obtain alumina carrier, Described complexing agent is selected from polyhydric alcohol or acetylacetone;

[0018] (2) Introduce active components into the alumina carrier prepared in step (1) by co-impregnation method or step-by-step impregnation method, then dry and calcinate to obtain a catalyst.

[0019] In the method (1), step (1) is carrier preparation, first mixing pseudo-boehmite with water, fully stirring for 1 to 24 hours, and then adding a peptizer for peptization to obtain aluminum sol. The suitable temperature for peptization is 0-95°C, and the time is preferably 2-10 hours. Described peptizer is selected from inorganic acid, preferably nitric acid, hydrochloric acid or sulfuric...

example 1

[0029] The following examples prepare the catalysts described in this invention.

[0030] (1) Preparation of carrier

[0031] Get 140 grams of pseudo-boehmite (produced by German Sasol company, PURAL SB, aluminum oxide content 74 mass %) is put into 2 liters of reaction flasks, add 0.9 liters of deionized water, stir for 24 hours, add 100 milliliters of concentrations and be the nitric acid solution of 2 mol / liters, make the H in the system + The molar ratio of / Al was 0.1. The peptization was stirred at 85°C for 6 hours to obtain a transparent aluminum sol. Keep the temperature of the sol at 60° C., add 100 g of glycerol and stir for 1 hour to obtain a glycerol-complexed aluminum gel. The gel was dried at 80°C for 12 hours, and then calcined at 650°C in air for 4 hours to obtain the alumina support SGA-1. The surface area and pore size distribution determined by BET method are shown in Table 1.

[0032] (2) Preparation of catalyst

[0033] Get 60 grams of alumina carrier...

example 2

[0035] Prepare carrier by the method for example 1 (1) step, difference is in the aluminum sol that makes, add 280 gram glycerols, the surface area and the pore size distribution of the alumina carrier SGA-2 that make are shown in Table 1.

[0036] Get 60 grams of alumina carrier SGA-2, prepare catalyst by the method for example 1 (2) step, the composition of the catalyst B that obtains after the presulfurization is shown in Table 2.

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PUM

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Abstract

The invention provides a naphtha reforming activator, comprising an alumina carrier and the following active components corresponding to dry-based alumina content measured by mass of 0.1% to 5.0% of the VIII element, 0.1% to 5.0% of VIIB family metal and 0.1% to 10.0% of halogen. The pore volume of the alumina is from 0.55mL / g to 0.75mL / g and the maximum pore radius is from 48 to 55. The activator is used for naphtha activator reforming and has high catalyzing activity and aromatics yield.

Description

technical field [0001] The invention relates to a naphtha reforming catalyst and a preparation method thereof, in particular to a reforming catalyst containing Group VIII metals supported by alumina and a preparation method thereof. Background technique [0002] Catalytic reforming uses naphtha fraction as raw material. Under certain reaction conditions and the action of a catalyst, the hydrocarbon molecules of the raw material are rearranged, dehydrogenation of naphthenes, isomerization of linear alkanes and dehydrocyclization, etc. reaction, the process of producing high-octane gasoline and aromatics while by-producing cheap hydrogen. The reforming catalyst is a supported dual-function catalyst, including the hydrogenation-dehydrogenation function provided by the metal component and the isomerization acid function provided by the support and non-metal elements. The commonly used support for reforming catalysts is activated alumina, such as γ-Al 2 o 3 and η-Al 2 o 3 . ...

Claims

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Application Information

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IPC IPC(8): B01J27/13B01J21/04B01J37/02B01J37/08C10G35/09
Inventor 张玉红陈志祥臧高山张大庆
Owner CHINA PETROLEUM & CHEM CORP
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