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N-alkene isomerization catalyst and preparation method thereof

An olefin isomerization and catalyst technology, which is applied in the field of olefin isomerization catalyst and its preparation, can solve problems such as complicated reaction process, and achieve the effects of increased yield, improved isomerization selectivity and easy control.

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

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preparation example Construction

[0014] The preparation method of the catalyst provided by the present invention includes mixing molecular sieves and binders, drying and roasting to obtain a carrier, and then impregnating 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] The method of mixing molecular sieve and binder in the method of the present invention is extruding, dropping ball, rolling ball or tableting method, preferably extruding. The extruding method is as follows: uniformly mix the molecular sieve with the binder or its precursor, add an appropriate amount of extrusion aid and / or peptizer and knead, and then extrude. The extrusion aid is preferably squash powder, and the peptizing agent is preferably an inorganic acid, such as hydrochloric acid or nitric acid. After the wet strip is cut into pellets, the carrier is obtained by drying and roasting. The temper...

example 1

[0027] Mix 10,788 grams of HZSM-35 molecular sieve with a molar ratio of silica to alumina of 25 and 1,638 grams of pseudoboehmite, 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. The trefoil-shaped strips with a diameter of 1.1 mm were cut into pellets, then dried at 120°C for 4 hours, and roasted at 550°C for 2 hours to obtain the carrier S 1 , which contains 90% by mass of HZSM-35 molecular sieve and 10% by mass of alumina.

[0028] Take 2000 grams of carrier S 1 , impregnated with 1939 ml of an aqueous solution containing 100.2 g (0.506 mol) of D-glucose at 25°C for 0.5 hours, and dried the impregnated solid at 90°C and 0.01MPa for 2 hours to obtain catalyst C 1 , whose weight is 2100 g, indicating that the catalyst C 1 Contains 100 grams of D-glucose, D-glucose and carrier S 1 The mass ratio is 0.05.

example 2

[0030] Take 2000 grams of carrier S 1 , impregnated with 1939 ml of an aqueous solution containing 147.3 grams (0.743 mol) of D-glucose at 25 ° C for 0.5 hours, and dried the solid at 90 ° C and 0.01 MPa for 2 hours after impregnation to obtain catalyst C 2 , whose weight is 2147 g, indicating that the catalyst C 2 Contains 147 grams of D-glucose, D-glucose with carrier S 1 The mass ratio is 0.074.

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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 monosaccharide or disaccharide, the mass ratio of the modified compound to the carrier is (0.01-0.3):1, and the carrier comprises a molecular sieve and a binder. According to the catalyst, catalytic active components are modified by the modified compound, and the isomerization selectivity of the catalyst can be remarkably improved.

Description

technical field [0001] The invention is an olefin isomerization catalyst and a preparation method thereof, specifically, a normal olefin skeleton isomerization catalyst and a preparation method thereof. Background technique [0002] With the increasingly stringent environmental protection requirements, the demand for clean gasoline continues to increase. Orthomorphic C 4 ~C 6 Isobutene, methylpentene and dimethylbutene obtained through skeletal isomerization of olefins can be etherified to prepare high-octane gasoline additives to improve gasoline quality. [0003] USP5,382,743 discloses a method of using ZSM-35 molecular sieve to carry out skeletal isomerization reaction of n-pentene under the condition of hydrogen, and finds that the reaction under the condition of hydrogen is conducive to improving the reactivity of the catalyst and reducing the loss of activity rate and prolong catalyst life. [0004] USP5,817,907 discloses a method for skeletal isomerization of line...

Claims

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Application Information

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IPC IPC(8): B01J31/26C07C5/25C07C11/10
Inventor 李金芝龙军于中伟孔令江
Owner CHINA PETROLEUM & CHEM CORP
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