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Supported metal catalyst for olefin isomerization reaction and preparation method thereof

A technology for olefin isomerization and metal loading, which is used in isomerization to produce hydrocarbons, carbon compound catalysts, catalysts for physical/chemical processes, etc. problems, to achieve the effects of long single-pass operation cycle, solving carbon deposition and coking, and solving isomerization activity

Active Publication Date: 2022-05-06
北京探微精细化工科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problem that the olefin isomerization catalyst is easy to coke, easy to deactivate, long single-pass service life is limited, the application provides a method for olefin skeletal isomerization Metal supported modified catalyst and its preparation method and application

Method used

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  • Supported metal catalyst for olefin isomerization reaction and preparation method thereof
  • Supported metal catalyst for olefin isomerization reaction and preparation method thereof
  • Supported metal catalyst for olefin isomerization reaction and preparation method thereof

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preparation example Construction

[0080] The specific preparation conditions and reactant ratios in the preparation method of the present application are not limited, as long as the target product can be formed. In some embodiments of the method, in step c, the ammonium salt is one or more of ammonium chloride, ammonium sulfate and ammonium nitrate; the ammonium exchange condition is molecular sieve, The weight ratio of ammonium salt to water is 1:(0.1-1):(5-10), the temperature is from room temperature to 100°C, and the time is 0.2-4 hours; the total dry basis weight of molecular sieves is calculated as sodium oxide and ammonium exchanged As a basis, the sodium content of the ammonium exchanged molecular sieve is less than 0.2 wt%.

[0081] In some embodiments of the method, in step e, the acid in the acid treatment process is selected from one or more of hydrochloric acid, nitric acid, sulfuric acid, citric acid and hydrofluoric acid; the concentration range of the acid used is 4 ~12 mol / L, the volume ratio...

Embodiment 1

[0132] (1) Preparation of Catalyst 1

[0133] A kind of synthetic method of silicon aluminum type molecular sieve, comprises the following steps:

[0134] First crystallization step a

[0135] Put silica gel, sodium aluminate, sodium hydroxide, ethylenediamine, and water in a crystallization kettle with a molar ratio of 1:0.15:0.07:0.3:35 and mix evenly. Crystallize at 130°C for 32 hours, and crystallize at 180°C for 65 Hours, to obtain crystallized silicon aluminum type molecular sieve slurry;

[0136] First cleaning step b

[0137] Filter the mother liquor from the crystallized silicon-aluminum molecular sieve slurry obtained in step a, and wash with water until Na 2 The O content (on a dry basis) is less than 2 wt%, filtered and dried to obtain a Na-type molecular sieve (also known as a water-washed molecular sieve), that is, catalyst 1.

[0138] The crystallinity, silicon-aluminum ratio, supported metal content, specific surface area, pore volume, sodium content, metal...

Embodiment 2

[0141] The preparation of catalyst 2 can be obtained by further processing catalyst 1 in embodiment 1, specifically as follows:

[0142] First ammonium exchange step c

[0143] Add 100g of catalyst 1 raw powder (dry basis) to 800g of water for beating, add 40g of NH 4 Cl, heated to 80 °C, exchanged for 1 h, to Na 2 The O content (on a dry basis) is lower than 0.2wt%, filtered and washed to obtain a molecular sieve filter cake;

[0144] first roasting step d

[0145] After drying the filter cake obtained in step c, it is roasted at 550° C. in an air atmosphere for 4 h;

[0146] Dealumination step e

[0147] Weigh 10.0 g of the roasted product obtained in step d and add 200 mL of HNO 3 solution, the concentration of the acid solution is 6mol / L, the temperature is raised to 100°C and the stirring is continued for 8 h, the liquid is cooled to room temperature and filtered, washed with deionized water until neutral, and the filter cake is dried.

[0148] Secondary crystalliza...

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Abstract

The invention relates to a supported metal catalyst for olefin isomerization reaction and a preparation method thereof. The catalyst comprises a molecular sieve and a supported metal supported on the molecular sieve, and the silica-alumina ratio of the catalyst is (200-2000): 1; the specific surface area is greater than or equal to 500 m < 2 > / g; the loaded metal is selected from one or more of magnesium, calcium, barium, scandium, titanium, vanadium, chromium, nickel, copper and zinc; the content of the loaded metal is 0.1-5wt%, and the oxide of the loaded metal is calculated and the dry basis weight of the molecular sieve is taken as a reference; the proportion of the mesopore volume of the catalyst to the total pore volume is more than or equal to 60 vol%, the mesopore volume and the total pore volume of the molecular sieve are measured by adopting a nitrogen adsorption BET specific surface area method, and the pore diameter range of the mesopore volume is more than 2 nanometers and less than 100 nanometers.

Description

technical field [0001] The present application relates to a catalyst for olefin isomerization and its preparation method and application, in particular to a metal-supported modified catalyst for olefin skeletal isomerization and its preparation method and application. Background technique [0002] In recent years, the fluctuation of world crude oil prices and the rapid progress of new energy technologies have promoted the development of the global petrochemical industry in the direction of diversification of raw materials and low cost, especially the rapid expansion of petrochemical production capacity in areas rich in light hydrocarbon resources in the Middle East, and the shale gas in North America. And the development of China's coal chemical industry has brought a huge impact on the traditional petrochemical industry that uses naphtha as raw material. The energy demand trend of international carbon dioxide emission reduction has also challenged the traditional fossil ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/65B01J35/10C01B39/48C07C5/27C07C11/10
CPCB01J29/65C01B39/48C07C5/2775B01J2229/186B01J2229/16C07C2529/65C01P2002/72C01P2004/03B01J35/617B01J35/615C07C11/10
Inventor 李江成李昊
Owner 北京探微精细化工科技有限公司
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