N-alkene isomerization catalyst and preparation method thereof

A technology for olefin isomerization and catalysts, which is applied in the field of olefin isomerization catalysts and its preparation, can solve problems such as the complexity of the reaction process, and achieve the effects of increased yield, easy control, and simple preparation methods

Active Publication Date: 2014-02-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, before the olefin isomerization reaction, a step of high-temperature pre-coking treatment using hydrocarbons as raw materials under an inert atmosphere is added, which complicates the reaction process

Method used

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  • N-alkene isomerization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0014] The preparation method of the catalyst provided by the present invention comprises the steps of mixing molecular sieve and a binder to form, drying and calcining to obtain a carrier, and then impregnating it with an aqueous solution of a modified compound. dry.

[0015] The molecular sieve is preferably one or any two of ZSM-35, ZSM-22 and SAPO-11, and the binder is preferably alumina.

[0016] In the method of the present invention, the method of mixing the molecular sieve and the binder to form is extruding, dropping ball, rolling ball or tabletting, preferably extruding. The extrusion molding method is as follows: mixing the molecular sieve and the binder or its precursor evenly, adding an appropriate amount of extrusion aid and / or peptizing agent and kneading, and then extrusion molding. The extrusion aid is preferably succulent powder, and the peptizer is preferably an inorganic acid, such as hydrochloric acid or nitric acid. After the wet strip is diced, the car...

example 1

[0027] Mix 10,788 grams of HZSM-35 molecular sieve with a silica / alumina molar ratio of 25 and 1,637.8 grams of pseudo-boehmite, add 65.5 grams of nitric acid with a concentration of 65% by mass and 10,770 grams of water, and extrude with a twin-screw extruder. Trilobal strips with a diameter of 1.1 mm were cut into pellets, dried at 120°C for 4 hours and calcined at 550°C for 2 hours to obtain carrier S 1 , wherein the content of HZSM-35 molecular sieve is 90% by mass, and the content of alumina is 10% by mass.

[0028] Take 2000 grams of carrier S 1 , impregnated with 1939 ml of an aqueous solution containing 147.6 g (1.603 mol) of glycerol at 25°C for 0.5 hours, and then dried at 90°C and 0.01MPa for 2 hours to obtain catalyst C 1 , its weight is 2146.8 grams, indicating that catalyst C 1 Contains 146.8 grams of glycerol, alcohol and carrier S 1 The mass ratio of 0.073.

example 2

[0030] Take 2000 grams of carrier S 1 , impregnated with 1939 ml of an aqueous solution containing 245.7 g (2.668 mol) of glycerol at 25 ° C for 0.5 hours, and then dried at 90 ° C and 0.01 MPa for 2 hours to obtain catalyst C. 2 , its weight is 2245.1 grams, indicating that catalyst C 2 Contains 245.1 grams of glycerol, alcohol and carrier S 1 The mass ratio of 0.122.

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Abstract

The invention discloses an n-alkene isomerization catalyst which comprises a carrier and a modified compound, wherein the modified compound is polyalcohol, the mass ratio of the modified compound to the carrier is (0.01-0.4):1, and the carrier comprises a molecular sieve and a binder. According to the catalyst, the catalytic active component is modified by the modified compound, and the isomerization selectivity of the catalyst can be remarkably improved.

Description

technical field [0001] The present invention is an olefin isomerization catalyst and a preparation method thereof, in particular, a normal olefin skeletal isomerization catalyst and a preparation method thereof. Background technique [0002] With the increasingly stringent environmental protection requirements, the demand for clean gasoline is increasing. by the orthoformed C 4 ~C 6 Isobutene, methylpentene and dimethylbutene obtained by skeletal isomerization of olefins can be etherified to prepare high-octane gasoline additives to improve gasoline quality. [0003] USP5,382,743 discloses a method for carrying out skeletal isomerization of n-pentene using ZSM-35 molecular sieve under the condition of hydrogen. Activation rate and prolong catalyst life. [0004] USP 5,817,907 discloses a method for skeletal isomerization of linear olefins. The catalyst used contains at least one pretreated molecular sieve, and the molecular sieve is selected from SAPO-11 and SAPO-31 with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C5/27C07C11/10
Inventor 李金芝龙军于中伟孔令江
Owner CHINA PETROLEUM & CHEM CORP
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