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Method for producing aromatic hydrocarbon by high-olefin light hydrocarbon

A technology of olefin content and light hydrocarbons, applied in chemical instruments and methods, chemical recovery, hydrocarbons, etc., can solve the problems of fast catalyst deactivation, high probability of coking, short one-way cycle, etc. The effect of strong coking ability and fewer regeneration times

Active Publication Date: 2015-06-10
SHANDONG DAQI PETROLEUM CHEM DESIGN
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Problems solved by technology

[0009] Aiming at the defects of high olefin content light hydrocarbon raw material aromatization reaction high probability of coking, large amount of carbon deposition, fast catalyst deactivation, short single-pass cycle, etc., the invention provides a method for producing aromatics by utilizing high olefin content light hydrocarbons, The above problems are solved by means of anti-coking technology equipment, new aromatization catalyst, and return of cycle gas

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  • Method for producing aromatic hydrocarbon by high-olefin light hydrocarbon
  • Method for producing aromatic hydrocarbon by high-olefin light hydrocarbon

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Embodiment

[0024] Embodiment: take carbon four, carbon five as example

[0025] The process steps are: the liquefied petroleum gas pretreated by impurities, cracked carbon five or the mixed raw materials of the two are gasified at 100-109°C in the high-efficiency anti-coking feed evaporator, then enter the composite heating furnace to raise the temperature to 450-570°C, and then Driven by the circulating return carrier gas, it enters the fixed-bed double reactor from top to bottom, and carries out aromatization under the action of special DLP-1 catalyst (produced by Shandong Qiwangda Group Haizhong Chemical Technology Co., Ltd., available in the market) Chemical reaction, reaction temperature 500°C-600°C, pressure 0-0.4MPa, space velocity 0.4-0.8h -1 . Most of the raw materials are converted into aromatic components such as benzene, toluene, and xylene, and at the same time, olefin-rich dry gases such as hydrogen, methane, ethylene, propane, and propylene are generated, and the yield of...

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Abstract

The invention aims at the defects of high probability of coking, much coke deposition, high rate of catalyst deactivation, short single-pass cycle and the like in aromatization reaction with high-olefin light hydrocarbon as a raw material, and provides a method for producing aromatic hydrocarbon with high-olefin light hydrocarbon, relating to the technical field of light hydrocarbon aromatization. The invention is characterized by comprising the following steps: after impurity pretreatment and subsequent gasification by a highly-effective coking prevention feed evaporator at the temperature of 100-109 DEG C, the high-olefin light hydrocarbon enters a complex heater with the temperature heating up to 450-570 DEG C, and then enters a fixed bed double reactor system from top to bottom driven by recycle return carrier gas, and undergoes aromatization reaction under the action of catalyst, with the reaction temperature of 500 DEG C-600 DEG C, the pressure of 0-0.4MPa, and the space velocity of 0.4-0.8h<-1>. By means of a coking prevention technical device, the novel aromatization catalyst, return of the recycle gas and the like, the invention solves the above problems.

Description

technical field [0001] The invention belongs to the technical field of aromatization of light hydrocarbons, in particular to a method for producing aromatics from light hydrocarbons with high olefin content. Background technique [0002] At present, some foreign light hydrocarbon aromatization technologies have entered the stage of industrial application. Domestic research on the aromatization of light hydrocarbons has also made some progress. For example, the Research Institute of Petroleum Science (RIPP) investigated the aromatization reaction of propane on ZRP molecular sieves and silicon-modified ZRP molecular sieves. On the ZRP molecular sieve, the xylene isomers in the liquid product are basically distributed in thermodynamic equilibrium, and the para-selectivity is poor; on the silicon-modified ZRP molecular sieve, with the increase of SiO2 content, the active center on the outer surface of the ZRP molecular sieve is covered. As the degree increases, the para-selecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C2/46C07C15/02
CPCY02P20/584
Inventor 宋金富
Owner SHANDONG DAQI PETROLEUM CHEM DESIGN
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