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Catalyst for benzene and C9 and more than that arene transalkylation

A technology of aromatic hydrocarbon alkyl and catalyst, which is applied in the direction of physical/chemical process catalysts, hydrocarbons, hydrocarbons, etc., can solve the problems that catalysts are not involved, and achieve the effects of convenient operation, mature technology and simple equipment

Inactive Publication Date: 2005-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the presence of catalysts used in the above-mentioned documents not related to the transalkylation reaction of benzene with carbon nine and above aromatics or not involving the transformation of carbon ten and above heavy aromatics into useful toluene and The problem of C8 aromatics, providing a new catalyst for the transalkylation of benzene with C9 and above aromatics

Method used

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  • Catalyst for benzene and C9 and more than that arene transalkylation
  • Catalyst for benzene and C9 and more than that arene transalkylation
  • Catalyst for benzene and C9 and more than that arene transalkylation

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Embodiment 1～3

[0030] Sodium mordenite, sodium β zeolite and sodium ZSM-5 zeolite were prepared according to ZL89106793.0, USP3308069 and USP4441991 respectively. Three kinds of sodium zeolites are ion-exchanged with ammonium chloride or ammonium nitrate aqueous solution at 90-98°C for 1-8 hours respectively, the mother liquor is filtered off, ion exchange is repeated several times, then washed, and dried at 110°C to obtain ammonium-type zeolites. SiO of three ammonium type zeolites 2 / Al 2 o 3 25, 25 and 500 respectively. Three ammonium-type zeolites were combined with pseudoboehmite (α-Al 2 o 3 ·H 2 O) mixing, adding dilute nitric acid, ammonium molybdate and water, kneading evenly, extruding, drying at 110° C., pelletizing, and roasting at 550° C. to obtain catalysts A1, A2, and A3. The metal molybdenum content of the three catalysts is 4.0% by weight .

Embodiment 4

[0032] Commercially available sodium Y zeolite (SiO 2 / Al 2 o 3 =4), carry out ion exchange, kneading, molding, roasting by the method for embodiment (1~3), make catalyst A4, the metal molybdenum content of catalyst A4 is 4.0% by weight.

Embodiment 5～7

[0034] Sodium-type MCM-22 zeolite, sodium-type MCM-49 zeolite and sodium-type MCM-56 zeolite were prepared according to USP4956514, USP5264643 and USP5453554 respectively. Three kinds of sodium zeolites are ion-exchanged with ammonium chloride or ammonium nitrate aqueous solution at 90-98°C for 1-8 hours respectively, the mother liquor is filtered off, ion exchange is repeated several times, then washed, and dried at 110°C to obtain ammonium-type zeolites. SiO of three ammonium type zeolites 2 / Al 2 o 3 30, 138 and 18 respectively. Three ammonium-type zeolites were combined with pseudoboehmite (α-Al 2 o 3 ·H 2 O) mixing, adding dilute nitric acid, ammonium molybdate and water, kneading evenly, extruding, drying at 110°C, pelletizing, and roasting at 550°C to obtain catalysts A5, A6, and A7, and the molybdenum content of the three kinds of catalysts is 4.0% by weight .

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Abstract

The present invention uses benzene and C9 and higher and higher aromatic hydrocarbon as reaction raw material, in the fixed bed reactor, under the condition of hydrogenation uses the composition formed from zeolite in which the silicon-aluminium ratio is 3-500 and alumina as catalyst, on the zeolite the metal molybdenum and non-forced-added at least one metal selected from Fe, Co, Ni, Cr, W, Bi, La, Zr and Ag or / and oxide are loaded, under the conditions of that its reaction temp. is 300-600 deg.C, pressure is 1.0-6.0 MPa, hydrogen and hydrocarbon mole ratio of 1-15 and weight space velosity WHSV is 0.5-5.0 hr.(-1), makes them produce reaction to obtain methylbenzene and C8 aromatics.

Description

technical field [0001] The present invention relates to the catalyst that is used for the transalkylation of benzene and carbon nine and above aromatics, specifically, is used for benzene (Ben) and carbon nine and above aromatics (C 9 + The transalkylation reaction of A) generates toluene (Tol) and carbon eight aromatic hydrocarbons (C 8 A) Catalyst. Background technique [0002] P-xylene is one of the main basic organic raw materials in the petrochemical industry. It is widely used in many chemical production fields such as chemical fibers, synthetic resins, pesticides, medicines, and plastics. The typical production method of paraxylene (pX) is through multi-stage cryogenic crystallization separation or molecular sieve simulated moving bed adsorption separation (referred to as Adsorption separation) technology to separate p-xylene from the isomer mixture with a boiling point close to it. For the treatment of ortho- and meta-xylene, C 8 A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/12B01J23/745C07C5/13C07C6/12C07C15/04
CPCY02P20/52
Inventor 邢宇孔德金李华英陈波
Owner CHINA PETROLEUM & CHEM CORP