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C*í½C*alkane isomerization catalyst and isomerization process

A technology of alkane isomerization and catalyst, applied in the field of alkane isomerization, can solve the problem of isomerization selectivity reduction and achieve the effect of high isomerization selectivity, high activity and low cracking activity

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, with C 5 / C 6 Many light alkane-based isomerization technologies have been industrially applied, but the existing light alkane isomerization catalysts are used for C 7 In the isomerization of alkanes or longer chain alkanes, there will be a problem of reduced isomerization selectivity, especially at higher conversions accompanied by the formation of a large number of cracking products

Method used

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  • C*í½C*alkane isomerization catalyst and isomerization process
  • C*í½C*alkane isomerization catalyst and isomerization process
  • C*í½C*alkane isomerization catalyst and isomerization process

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preparation example Construction

[0013] The preparation method of the catalyst provided by the present invention includes mixing L zeolite, hydrated zirconia and binder, forming a composite carrier through molding, impregnating the composite carrier with dilute sulfuric acid solution, drying the compound carrier containing Group VIII metal The solution is impregnated, then dried and fired.

[0014] The L zeolite used to prepare the composite carrier in the method is preferably hydrogen type, and the method for preparing hydrogen type L zeolite is to use 0.1 to 5.0 moles / liter of ammonium salt solution, preferably ammonium chloride solution, at 80 to 105 °C for L zeolite. For ion exchange, the number of exchanges can be one to multiple times, preferably 1 to 5 times, and the time for each exchange is preferably 0.5 to 10 hours.

[0015] When preparing the composite carrier, mix L zeolite, hydrated zirconia and binder, add a small amount of peptizer, and shape it. The molding method is preferably extrusion mold...

example 1

[0022] Preparation of Hydrogen Form L Zeolite.

[0023] Get 100 grams of silica / alumina molar ratio to be 5.1, Na 2 O content is 0.01% by mass, K 2 O content is the L zeolite of 23.4 mass % (according to the disclosed hydrothermal method synthesis of patent US 3216789), with 300 milliliters of concentration be the NH of 1 mol / liter 4 The Cl solution was treated at 92°C for 3 hours for ion exchange, then filtered and washed with deionized water until the filtrate contained no Cl - , dried at 120°C to make SiO 2 / Al 2 o 3 Hydrogen-form L zeolite HL with a molar ratio of 5.5 (determined by fluorescence spectrometry).

example 2

[0025] Preparation of hydrated zirconia.

[0026] Zirconium oxychloride (ZrOCl 2 ·8H 2 (0) be made into 5 mass % aqueous solution, add dropwise 25 mass % concentrated ammonia water to solution pH value is 8.5, all precipitation and solution are transferred in the autoclave, 120 ℃ of crystallization 24 hours, precipitation washing and filtering to filtrate is Neutral and no detectable Cl -1 , Dry at 110°C for 24 hours to produce hydrated zirconia.

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Abstract

The invention relates to C7C20 paraffin isomerization catalyst, which comprises a composite carrier, VIII metals and sulfate. The composite carrier comprises 10 to 70 mass percent of L zeolite, 10 to 60 mass percent of zirconia and 10 to 50 mass percent of binder. The catalyst includes 0.01 to 5.0 mass percent of the VIII metals and 0.1 to 5 mass percent of the sulfate. The catalyst is used for the isomerization reaction of the paraffin with larger carbon number, and has high activity, low pyrolysis product and high isomerization selectivity.

Description

technical field [0001] The present invention is a kind of n-paraffin isomerization catalyst and its preparation method and application, specifically, it is a kind of C 7 ~C 20 An alkane isomerization catalyst, a preparation method and a method for alkane isomerization using the catalyst. Background technique [0002] With the vigorous development of the world's automobile industry and the increasing harm caused by automobile exhaust to the atmospheric environment and human health, human beings have made increasingly strict restrictions on the emission of automobile exhaust, and at the same time put forward stricter and stricter requirements on the quality of gasoline for vehicles. Require. Therefore, the refining process to improve the quality of gasoline by changing the molecular structure of oil has become the goal pursued by people. In some crude oils, especially paraffin-based crude oil, the content of n-alkanes is relatively high. The n-alkanes in gasoline will cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/62B01J21/06B01J21/04C10G35/095
Inventor 魏祥于中伟张秋平
Owner CHINA PETROLEUM & CHEM CORP
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