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Solid super acidic catalyst and its preparation method

A solid superacid and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems not mentioned, and achieve increased surface area, improved stability, and improved catalytic activity. Effect

Inactive Publication Date: 2004-07-28
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent does not mention the addition of a mixture of silica and alumina to zirconium hydroxide

Method used

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  • Solid super acidic catalyst and its preparation method

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preparation example Construction

[0016] The preparation method of the catalyst of the present invention comprises firstly preparing a mixture of silicon oxide and aluminum oxide, then mixing the mixture with zirconium hydroxide evenly, then impregnating with an aqueous solution of a sulfur compound, drying and forming the solid at 400-800°C Roasting.

[0017] The preparation method of the silicon oxide and aluminum oxide mixture is to uniformly mix the hydrated aluminum oxide and the silicon sol liquid, and then dry. The silicon dioxide content of the silica sol used is 10-50% by weight, preferably 35-45% by weight, and the two oxides are preferably mixed by grinding. The mixed solid material is preferably ion-exchanged with an ammonium salt solution to remove sodium ions. The temperature of the ion exchange is 80-90°C, the concentration of the ammonium salt solution used is preferably 10-20% by weight, and the ammonium salt is preferably ammonium chloride or ammonium nitrate. The mixture after grinding and...

example 1

[0029] Preparation of Zirconium Hydroxide

[0030] 400 grams of analytically pure zirconium oxychloride (ZrOCl 2 ·8H 2 (0, produced by North China Specialty Chemical Reagent Development Center) was dissolved in 1500 milliliters of deionized water, while stirring, slowly added 200 milliliters of strong ammonia water to a pH of 8, and the precipitate obtained was washed with deionized water and filtered until the filtrate was neutral. and could not detect Cl -1 , the solid was dried at 110 °C for 24 hours to produce amorphous Zr(OH) 4 powder.

example 2

[0032] Preparation of silica and alumina mixtures

[0033] Take 6 grams of silica sol (SiO 2 content is 41% by weight) was added to 65 grams of aluminum hydroxide (Germany, Condea company, brand SB) powder, ground evenly, and dried at 110° C. for 24 hours. Add 200 ml of 10% NH 4 Cl solution was refluxed for 3 hours under stirring at 80°C, washed with deionized water, filtered, and repeated three times, and dried at 110°C for 24 hours to prepare a mixture with silica and alumina contents of 5% by weight and 95% by weight respectively.

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Abstract

The present invention relates to a solid super acidic atalyst, including mixed oxide sulfated by sulfureous compound, and said mixed oxide includes 25-90 wt% of zirconium oxide, 9-74 wt% of alumina and 1-30 wt% of silicon oxide, and the sulfur content in the catalyst is 0.5-2.5 wt%. Said catalyst is applicable to isomerization reaction of C5 / C6 normal paraffins.

Description

technical field [0001] The invention relates to a solid superacid catalyst and a preparation method thereof, in particular to a solid superacid catalyst containing zirconia and sulfate radicals and a preparation method thereof. Background technique [0002] C 5 / C 6 The isomerization of normal paraffins is an important means to improve the quality of gasoline. It can convert normal paraffins in raw materials into corresponding isomeric hydrocarbons, thereby increasing the front-end octane number of gasoline, reducing the vapor pressure of gasoline, and making gasoline have good Antiknock performance. Isomerized oil is a low-sulfur, aromatic and olefin-free clean gasoline product, which is beneficial to environmental protection, so it occupies an increasingly important position in refinery production. [0003] The catalyst used for the isomerization reaction of n-alkanes should have strong acidity. At present, there are mainly two types of catalysts used in industry, name...

Claims

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Application Information

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IPC IPC(8): B01J27/053B01J37/00
Inventor 范书信于中伟濮仲英孙义兰
Owner CHINA PETROLEUM & CHEM CORP
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