Benzene and C9 and more than that arene transalkylation method

A technology of aromatic hydrocarbon alkylation and transfer method, which is applied in chemical instruments and methods, hydrogenation to hydrocarbons, hydrocarbons, etc., can solve the problem of catalyst stability without zeolite metal modification, inability to effectively utilize heavy aromatic hydrocarbons, and unfavorable aromatic hydrocarbons. Combined device and other problems, to achieve the effect of easy industrialization, convenient operation and simple equipment

Inactive Publication Date: 2003-09-24
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increase in Ben volume, C 8 The reduction in A volume is clearly detrimental to the overall aromatics complex
These deficiencies have limited the development of such processes
[0007] Summarizing the above processes, it is not difficult to see that all these patents are aimed at one or some aspects of a specific toluene disproportionation and transalkylation catalyst, such as the transalkylation ability of heavy aromatics or the separation scheme of reaction products Made reasonable changes above, but still did not break through the limitations of the original Tatoray process ideas
Its common disadvantages are: using toluene or toluene and aromatics above carbon nine to produce carbon eight aromatics to increase the production of p-xylene, inevitably by-product benzene, and cannot effectively utilize heavy aromatics
The catalyst used in this patent is a hydrogen-type DGA zeolite without metal modification, and there is no report on the metal modification and catalyst stability of this zeolite

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0025] 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. [Examples 5-7]

Embodiment 5～7

[0026] 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 . [Embodiments 8-13]

Embodiment 8～13

[0027] Prepare SiO according to USP3308069 2 / Al 2 o 3 Four kinds of β zeolites with 25.7, 35.1, 40.2 and 44.0, respectively, were exchanged with ammonium, dried, and commercially available pseudoboehmite (α-Al 2 o 3 ·H 2 O) Mix according to 50 / 50 (weight ratio), add dilute nitric acid and water, knead evenly, extrude, dry at 110°C, pelletize, and roast at 400°C to obtain cylindrical objects. The cylinder was soaked in ammonium molybdate aqueous solution overnight, then dried at 110°C, and then calcined at 540°C to obtain catalysts B1, B2, B3, and B4 containing 4.0% by weight of metal molybdenum. Catalysts B5 and B6 with the weight ratios of Hβ zeolite and commercially available pseudo-boehmite being 70 / 30 and 30 / 70 were obtained in the same manner. [Examples 14-16]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention adopts benzene and C9 and higher aromatic hydrocarbons as raw material for reaction, in the fixed bed reactor and 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 metal molybdenum or/and its oxide 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 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 velocity WHSV is 0.5-5.0 hr.(-1) makes the above-mentioned materials produce reaction to produce methylbenzene and C8 aromatics.

Description

technical field [0001] The invention relates to a method for transalkylation of benzene, carbon nine and above aromatic hydrocarbons. Specifically, through benzene (Ben) and carbon nine and above aromatics (C 9 + The transalkylation reaction of A) generates toluene (Tol) and carbon eight aromatic hydrocarbons (C8A), supplying toluene selective disproportionation unit and C 8 A isomerization unit, used to increase the production of p-xylene. 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 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/13C07C6/12C07C15/04
Inventor 孔德金邢宇
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap