Catalyst for isomerizing low-carbon paraffin and its preparing process

A technology of alkane isomerization and catalyst, which is applied in the field of solid superacid catalyst and preparation, can solve the problem of unsatisfactory isomerization selectivity, achieve large specific surface area, improve the selectivity of isoparaffins, and reduce the effect of cracking activity
CN1541764AInactive Publication Date: 2004-11-03CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2004-11-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The solid acid catalyst for isomerizing C4-C7 alkane includes sulfate radical and VIII metal carried on carrier, and the carrier consists of zirconia, alumina and one kind of modifying element selected from RE element or IIA metal. The catalyst contains zirconia in tetragonal crystal system, S 0.5-5.0 wt%, VIII metal 0.1-5.0 wt% and modifying element 0.1-10.0 wt%, and has zirconia / alumina mass ratio of 10-90 to 10-90. The catalyst is used in isomerizing lower alkane and has high activity stability and isomerizing selectivity.
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Description

technical field

[0001] The invention relates to a solid superacid catalyst and a preparation method thereof, in particular to a catalyst containing zirconia and sulfate radicals for isomerization of normal alkanes and a preparation method thereof. Background technique

[0002] Acid catalysts play an important role in the petrochemical industry. Commonly used acid catalysts include liquid acid catalysts, such as H 2 SO 4 , HF, and halogen-containing solid acid catalysts. These two types of catalysts have problems such as polluting the environment and corroding equipment. Halogen-containing solid acid catalysts are very easy to lose halogen, so the water in the raw material is strictly controlled, and the halogen needs to be replenished frequently. SO 4 2- / ZrO 2 The solid superacid catalyst has the advantages of high activity, high selectivity, good thermal stability, easy phase separation from the reaction product, environmental friendliness, no corrosion of equipment,...

Claims

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