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Method for producing high-quality ethylbenzene by light hydrocarbon cracking

A high-quality, light hydrocarbon technology, applied in the chemical industry, can solve the problems of high and different reaction temperatures, and achieve the effects of high quality, low production cost and high market value

Active Publication Date: 2019-09-10
常州瑞凯化工装备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reaction temperature of the gas phase alkylation process is as high as 320-390°C, the content of xylene produced is controlled at 1000PPM, and the product quality is poor. The same, so using light hydrocarbon cracking to produce high-quality ethylbenzene requires a new process production method

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  • Method for producing high-quality ethylbenzene by light hydrocarbon cracking
  • Method for producing high-quality ethylbenzene by light hydrocarbon cracking

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Embodiment Construction

[0027] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] Examples such as figure 1 Shown: it is the production process of obtaining concentrated ethylene gas as a raw material by cracking light hydrocarbons, specifically: light hydrocarbons such as ethane, propane, butane are used as raw materials, propane and butane are used as raw materials in this embodiment, after gasification and The superheated steam in the convection section of the cracking furnace 1 is mixed, and then enters the radiation section of the cracking furnace 1. After passing through the radiation section of the cracking furnace 1, the raw material becomes cracked gas containing ethylene, and the cracked gas is cooled to 350 degrees by the quenching heat exchanger 2. The quenching oil tower 3 is cooled to 100 degrees, and after being cooled to 40 degrees by the qu...

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Abstract

The invention relates to a method for producing high-quality ethylbenzene by light hydrocarbon cracking. The method comprises the following steps: (1) preparing a concentrated ethylene gas: performingtreatment on a light hydrocarbon raw material in a cracking gas to form an ethylene-containing cracked gas, performing cooling on the cracked gas, performing compression, allowing the compressed gasto enter a depropanizing tower, allowing a material separated from the top of the depropanizing tower to enter a deethanizing tower, and performing separation to obtain the concentrated ethylene gas;(2) performing pretreatment on the concentrated ethylene gas: removing impurity chlorine of the concentrated ethylene gas, removing impurity arsenic, removing diolefin, removing alkyne, removing oxygen, removing carbon monoxide and nitrogen oxides, removing carbonyl sulfide, removing impurity sulfur, and removing alkaline impurities to obtain a concentrated ethylene dry gas; and (3) producing theethylbenzene in a large scale by utilizing the concentrated ethylene dry gas through a liquid phase process. The method provided by the invention adopts the low-cost light hydrocarbon as the ethyleneraw material, realizes the purpose of large-scale production of the ethylbenzene by adopting the liquid phase process, and has low production costs, high quality of the produced ethylbenzene, and higher market value.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a method for large-scale production of high-quality ethylbenzene by using light hydrocarbons such as ethane, propane and n-butane as raw materials and adopting a liquid phase process. Background technique [0002] Industrialized ethylbenzene is basically produced through the alkylation of benzene and ethylene, and the produced ethylbenzene is mainly used for dehydrogenation to produce chemical raw material monomer styrene. The raw materials needed for the production of ethylbenzene are benzene and ethylene, of which benzene is a bulk material and easy to purchase. The raw material ethylene can be divided into polymerization grade ethylene and catalytic cracking dry gas containing ethylene. The polymerization grade ethylene comes from the traditional ethylene plant, and the ethylene product reaches the polymerization grade. It can meet the needs of ethylbenzene production without pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/66C07C15/073
CPCC07C2/66C07C4/02C07C7/005C07C15/073C07C11/04
Inventor 和成刚周海燕张晶张文明徐志刚
Owner 常州瑞凯化工装备有限公司
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