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Method for selectively cracking non-aromatic hydrocarbon

A non-aromatic and selective technology, applied in hydrocarbon cracking to produce hydrocarbons, chemical instruments and methods, molecular sieve catalysts, etc., can solve the problems of poor selectivity and low activity of cracking catalysts, and achieve the effect of reducing strong acid centers and improving cracking activity.

Active Publication Date: 2018-07-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention solves the problems of low cracking catalyst activity and poor selectivity in the prior art, and provides a new method for selective cracking of non-aromatic hydrocarbons

Method used

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  • Method for selectively cracking non-aromatic hydrocarbon

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] SiO 2 / Al 2 o 3 25 mordenite 195g with γ-Al 2 o 3 Mix 107.1g evenly, then add dilute nitric acid and safflower powder, knead evenly, extrude into strips, roast to make a carrier, cut into pellets and place in an impregnation container. The metal precursor iridium chloride was dissolved in water, mixed evenly, impregnated with the surface of the carrier, dried at 120°C for 4 hours, and calcined at 500°C for 3 hours to obtain catalyst E.

[0034]In a fixed-bed reactor, install 20 grams of catalyst E, feed hydrogen, heat up to 400°C, purging for two hours for reduction activation, the reaction temperature is 400°C, the pressure is 3MPa, according to WHSV=2.5h -1 Working condition feed, hydrogen hydrocarbon molecular ratio 3.0. The raw material weight composition is toluene / methylcyclohexane=99.5 / 0.5. The catalyst reaction performance results are shown in Table 1. The catalyst reaction remained stable for 300 hours.

Embodiment 2

[0036] SiO 2 / Al 2 o 3 25 mordenite 195g with γ-Al 2 o 3 Mix 107.1g evenly, then add dilute nitric acid and safflower powder, knead evenly, extrude into strips, roast to make a carrier, cut into pellets and place in an impregnation container. Catalyst F was obtained by dissolving the metal precursor iridium chloride in water, mixing evenly, impregnating the surface of the carrier, drying at 120°C for 4 hours, and calcining at 500°C for 3 hours.

[0037] In a fixed-bed reactor, install 20 grams of catalyst F, feed hydrogen, raise the temperature to 400 ° C, purging for two hours for reduction activation, the reaction temperature is 400 ° C, the pressure is 3 MPa, according to WHSV = 2.5h -1 Working condition feed, hydrogen hydrocarbon molecular ratio 3.0. The raw material weight composition is toluene / methylcyclohexane=99.5 / 0.5. The catalyst reaction performance results are shown in Table 1. The catalyst reaction remained stable for 300 hours.

Embodiment 3

[0039] SiO 2 / Al 2 o 3 25 mordenite 195g with γ-Al 2 o 3 Mix 107.1g evenly, then add dilute nitric acid and safflower powder, knead evenly, extrude into strips, roast to make a carrier, cut into pellets and place in an impregnation container. The metal precursor nickel nitrate was dissolved in water, mixed evenly, impregnated with the surface of the carrier, dried at 120°C for 4 hours, and calcined at 500°C for 3 hours to prepare catalyst G.

[0040] In a fixed-bed reactor, install 20 grams of catalyst G, feed hydrogen, heat up to 400°C, purging for two hours for reduction activation, the reaction temperature is 400°C, the pressure is 3MPa, according to WHSV=2.5h -1 Working condition feed, hydrogen hydrocarbon molecular ratio 3.0. The raw material weight composition is toluene / methylcyclohexane=99.5 / 0.5. The catalyst reaction performance results are shown in Table 1. The catalyst reaction remained stable for 300 hours.

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Abstract

The invention relates to a method for selectively cracking non-aromatic hydrocarbon. The method for selectively cracking non-aromatic hydrocarbon mainly solves the problems in the prior art that a cracking catalyst is low in activity and poor in selectivity. Under a cracking reaction condition, a material which contains non-aromatic hydrocarbon and is derived from a toluene disproportionation and / or transalkylation reaction is in contact with the catalyst, wherein the catalyst is prepared from, by weight, 20-80 parts of at least one kind of zeolite of mordenite, ZSM-5, beta zeolite and gamma zeolite, 0.05-5 parts of at least one auxiliary of nickel, zinc, strontium, magnesium, iridium or an oxide thereof, and 10-40 parts of binder. The efficient cracking method of non-aromatic hydrocarbonwell solves the problems, and can be used for industrial production of cracking of the toluene disproportionation and / or transalkylation reaction.

Description

technical field [0001] The invention relates to a method for selective cracking of non-aromatic hydrocarbons. Background technique [0002] Benzene, toluene and xylene (abbreviated as BTX aromatics) are important basic organic raw materials in modern petrochemical industry. Silico-alumina molecular sieve is a crystalline aluminosilicate zeolite, in which silicon atoms and aluminum atoms in the crystal structure are connected to each other through oxygen atoms to form a network structure, and are often used as aromatic hydrocarbon disproportionation and transalkylation catalysts. In addition, metals such as platinum, rhenium, molybdenum, and bismuth are usually introduced into the molecular sieve catalyst to improve the stability of the catalyst and increase the processing capacity of heavy aromatics. Document CN105272804A discloses a method of aromatics transalkylation and non-aromatics cracking to increase xylene production, which is mainly aimed at traditional aromatics c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/22B01J29/24B01J29/18C07C4/06C07C9/08C07C9/10C07C9/14
CPCB01J29/18B01J29/185B01J29/22B01J29/24C07C4/06C07C9/08C07C9/10C07C9/14
Inventor 李华英王晓晨李经球孔德金
Owner CHINA PETROLEUM & CHEM CORP
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