Method for increase production of BTX (benzene, toluene and xylol) aromatic hydrocarbons and trimethylbenzene through hydrocracking heavy aromatic hydrocarbons

A technology of BTX aromatics and hydrocracking, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of low added value of heavy aromatics and high cost of trimethylbenzene monomers

Active Publication Date: 2012-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the added value of traditional heavy aromatics is low, and the cost of separating and producing trimethylbenzene monomers from heavy aromatics containing methyl ethyl benzene, propylbenzene and butylbenzene is relatively high, and a new method for utilizing heavy aromatics is provided. Method for increasing production of BTX aromatics and trimethylbenzene by hydrocracking

Method used

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  • Method for increase production of BTX (benzene, toluene and xylol) aromatic hydrocarbons and trimethylbenzene through hydrocracking heavy aromatic hydrocarbons
  • Method for increase production of BTX (benzene, toluene and xylol) aromatic hydrocarbons and trimethylbenzene through hydrocracking heavy aromatic hydrocarbons

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Effect test

Embodiment 1～2

[0015] Binder-free ZSM-5 zeolite (SiO 2 / Al 2 o 3The molar ratio is 60) prepared with reference to Chinese patent CN100384735C, the prepared binderless ZSM-5 zeolite crushing strength is greater than 75N / particle, the weight content of ZSM-5 zeolite is 98.5%, the product is ion-exchanged with ammonium nitrate solution, and after exchange Carry out roasting and transform into hydrogen-type zeolite. On the hydrogen-type binderless ZSM-5 zeolite, impregnate 0.05% Pt and 0.25% Zn by weight, and calcinate at 450°C for 4 hours to obtain catalyst a; on the hydrogen-type binderless ZSM-5 zeolite Catalyst b was obtained by impregnating 0.3% of Pd and 0.05% of Pb in weight ratio, and calcining at 450° C. for 4 hours. Reduction-activated a and b catalysts were used for reaction evaluation, and the composition of the heavy aromatics reaction raw materials used was aromatics with 6-8 carbons in weight percent: 1.79%; mesitylene: 12.15%; trimitylene: 38.35%; Pythylene: 3.95%; other 9 ca...

Embodiment 3～5

[0017] Binder-free ZSM-5 zeolite (SiO 2 / Al 2 o 3 The molar ratio is 20) prepared with reference to Chinese patent CN100384735C, the prepared binderless ZSM-5 zeolite has a crushing strength greater than 65N / particle, and the weight content of ZSM-5 zeolite is 99.6%. The product is ion-exchanged with ammonium nitrate solution, and after the exchange Carry out roasting and transform into hydrogen-type zeolite. On the hydrogen-type binderless ZSM-5 zeolite, impregnate 0.005% of Pt and 0.01% of Sn by weight, and calcined at 450°C for 4 hours to obtain catalyst c; on the hydrogen-type binderless ZSM-5 zeolite Impregnate 0.5% of Pd, 0.01% of Zn and 1.0% of La by weight, and calcinate at 450°C for 4 hours to obtain catalyst d; impregnate 0.03% by weight of hydrogen-type binder-free ZSM-5 zeolite Pt, 0.02% Bi and 0.2% Sn were calcined at 450° C. for 4 hours to obtain catalyst e. Reduction-activated c, d, e catalysts were used for reaction evaluation, and reduction-activated c-e c...

Embodiment 6～7

[0019] Binder-free ZSM-11 zeolite (SiO 2 / Al 2 o 3 The molar ratio is 45) prepared with reference to Chinese patent CN101348261A, the prepared binderless ZSM-11 zeolite crushing strength is greater than 80N / particle, the weight content of ZSM-11 zeolite is 97.9%, the product is ion-exchanged with ammonium nitrate solution, after exchange Carry out roasting and transform into hydrogen-type zeolite. On the hydrogen-type binderless ZSM-11 zeolite, impregnate 0.06% of Pt and 0.2% of Zn by weight, and calcinate at 450°C for 4 hours to obtain catalyst f; on the hydrogen-type binderless ZSM-11 zeolite Catalyst g was obtained by impregnating 0.2% Pt and 0.20% Bi by weight and calcining at 450° C. for 4 hours. Use reduction-activated f, g catalyst to carry out reaction assessment, the heavy aromatics reaction raw material composition and reaction conditions that adopt are the same as embodiment 3, reaction conditions and reaction result are listed in table 2, can find out from table...

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Abstract

The invention relates to a method for the increase production of BTX aromatic hydrocarbons and trimethylbenzene through hydrocracking heavy aromatic hydrocarbons to mainly solve technical problems of low heavy aromatic hydrocarbon added value and high cost for separating and producing trimethylbenzene monomers in the heavy aromatic hydrocarbons containing methylethylbenzene, propylbenzene and butylbenzene. The method comprises a step that the heavy aromatic hydrocarbons are subjected to a hydrocracking reaction through adopting Pt/Pd-loaded hydrogen type binder-free ten-membered ring zeolite as a catalyst under reaction conditions comprising that the reaction temperature is 320-450DEG C, the reaction pressure is 2.0-4.0Mpa, the hydrocarbons raw material weight hourly space velocity is 1.0-4.0h<-1> and the hydrogen/hydrocarbon raw material ratio by mole is 3-10:1. The method well solves the problems through above technical scheme, and can be applied to the industrial production of the BTX aromatic hydrocarbons and the trimethylbenzene.

Description

technical field [0001] The invention relates to a method for increasing the production of BTX aromatics and trimethylbenzene by utilizing heavy aromatics hydrocracking. Background technique [0002] Heavy aromatics include by-products of steam cracking units and refinery continuous reforming units, mainly carbon nine and carbon ten aromatics, which are valuable petrochemical resources, especially reforming heavy aromatics. With the successive production of continuous reforming units of large petrochemical enterprises in my country in recent years, the output of reformed heavy aromatics has increased rapidly. In addition to the production of paraxylene (PX) in continuous reforming units, heavy aromatics (continuous heavy aromatics) The C9 aromatics in the heavy aromatics in the whole plant are generally used for the disproportionation and isomerization of C7 to produce PX), and a considerable part enters the heavy aromatics comprehensive utilization production device for proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/02C07C15/04C07C15/06C07C15/08C07C4/18
CPCY02P20/52
Inventor 王德举唐之勤王辉刘仲能
Owner CHINA PETROLEUM & CHEM CORP
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