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Normal olefin 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: 2016-03-23
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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  • Normal olefin isomerization catalyst and preparation method thereof
  • Normal olefin isomerization catalyst and preparation method thereof
  • Normal olefin isomerization catalyst and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0021] The preparation method of the catalyst provided by the present invention comprises mixing the medium-pore molecular sieve and the large-pore molecular sieve with a binder to form, drying and roasting to obtain a carrier, and then impregnating it with a solution of a modified compound. Dry under the condition of 0.01~0.1MPa.

[0022] The medium pore molecular sieve is preferably ZSM-5 and ZSM-22 and / or SAPO-11, the macroporous molecular sieve is preferably Beta molecular sieve, and the binder is preferably alumina.

[0023] 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 mixed molecular sieve with the binder or its precursor, add an appropriate amount of extrusion aid and / or peptizer and knead, and then extrude and form. The extrusion aid is preferably squash powder, and the peptizing agent is p...

example 1

[0035] Mix 3568 grams of SAPO-11 molecular sieve, 3946 grams of HZSM-5 molecular sieve, 2326 grams of HZSM-22 molecular sieve, 948 grams of Beta molecular sieve and 1637.8 grams of pseudo-boehmite, add 65.5 grams of nitric acid with a concentration of 65% by mass and 10770 grams of water , extruded into a trefoil strip with a diameter of 1.1 mm by a twin-screw extruder, pelletized, dried at 120°C for 4 hours, and calcined at 550°C for 2 hours to obtain the carrier S 1 , wherein the molecular sieve content is 90% by mass, and the alumina content is 10% by mass.

[0036] Take 2000 grams of carrier S 1 , impregnated with 1952 ml of n-heptane solution containing 283.1 g (2.618 mol) of o-cresol at 25 ° C for 0.5 hours, and dried at 90 ° C and 0.01 MPa for 2 hours to obtain catalyst C 1 , whose weight is 2280.9 g, indicating that the catalyst C 1 Contains 280.9 grams of o-cresol, which contains phenol and carrier S 1 The mass ratio is 0.14.

example 2

[0038] Mix 3879.0 grams of SAPO-11 molecular sieve, 3790.0 grams of HZSM-5 molecular sieve, 2898.0 grams of HZSM-22 molecular sieve, 221.0 grams of Beta molecular sieve and 1637.8 grams of pseudo-boehmite, add 65.5 grams of nitric acid with a concentration of 65% by mass and 10770 grams of water , extruded into trefoil strips with a diameter of 1.1 mm by a twin-screw extruder, pelletized, dried at 120°C for 4 hours, and calcined at 550°C for 2 hours to obtain the carrier S 2 , wherein the molecular sieve content is 90% by mass, and the alumina content is 10% by mass.

[0039] Take 2000 grams of carrier S 2 , impregnated with 1955 ml of n-heptane solution containing 326.5 g (2.965 mol) of catechol at 25 ° C for 0.5 hours, and then dried at 130 ° C and 0.01 MPa for 2 hours to obtain catalyst C 2 , whose weight is 2323.2 g, indicating that the catalyst C 2 Contains 323.2 grams of catechol, which contains phenol and carrier S 2 The mass ratio is 0.162.

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Abstract

The invention discloses an n-alkene isomerization catalyst which comprises a carrier and a modified compound, wherein the mass ratio of the modified compound to the carrier is (0.01-0.4):1, the carrier comprises a mixed molecular sieve and a binder, the modified compound is selected from phenol, monosaccharide or disaccharide and polyalcohol or organic acid ammonia, and the mixed molecular sieve comprises a mesoporous molecular sieve and a macroporous molecular sieve. 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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85C07C5/27C07C11/10
Inventor 李金芝龙军于中伟孔令江
Owner CHINA PETROLEUM & CHEM CORP
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