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Process for preparing p-xylene by using raw materials of low-carbon alcohol ether and low-carbon hydrocarbon

A technology of p-xylene and process method, applied in the direction of biological raw materials, hydrocarbon production from oxygen-containing organic compounds, organic chemistry, etc., can solve the problems of low selectivity of target products, low product yield, complicated process flow, etc. Achieve the effects of not harsh conditions for plant construction, low energy consumption and cost, and low emissions

Active Publication Date: 2013-12-18
江苏煤化工程研究设计院有限公司
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Problems solved by technology

However, there are problems such as single raw materials, complex process flow, and low product yield caused by low selectivity of the target product in the existing process technology.

Method used

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  • Process for preparing p-xylene by using raw materials of low-carbon alcohol ether and low-carbon hydrocarbon
  • Process for preparing p-xylene by using raw materials of low-carbon alcohol ether and low-carbon hydrocarbon
  • Process for preparing p-xylene by using raw materials of low-carbon alcohol ether and low-carbon hydrocarbon

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with specific embodiments. In the following examples, methanol is used as a raw material for the preparation of p-xylene, but the present invention is not limited to only using methanol as a raw material for the preparation of p-xylene.

[0021] The technical process for preparing p-xylene described in the present invention comprises the following steps:

[0022] (1) Put 15g of molecular sieve catalyst for methanol alkylation into the hydrocarbonation reactor of the multi-stage fixed-bed reactor, put 40g of molecular sieve catalyst for aromatization into the aromatization reactor of the above-mentioned multi-stage fixed-bed reactor, and put The pressure of the alkylation reactor and the aromatization reactor is controlled at 0.01~0.5MPa (preferably 0.1~0.2MPa), the temperature is controlled at 180~600°C (preferably 400~500°C), methanol and water are mixed according to the molar ratio Prepare...

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Abstract

The invention discloses a process for preparing p-xylene by using raw materials of low-carbon alcohol ether and low-carbon hydrocarbon. According to the process, raw materials of coal-base low-carbon alcohol ether and low-carbon hydrocarbon are successively subjected to a hydrocarbonylation reaction, an aromatization reaction, a methylation reaction and an isomerization reaction in a multifunctional multistage fixed bed reactor to produce p-xylene; and the gas generated in the reaction process returns to the multifunctional multistage fixed bed reactor and is successively subjected to a hydrocarbonylation reaction, an aromatization reaction, a methylation reaction and an isomerization reaction. The process can realize a raw material conversion rate of more than 99 wt%, conversion per pass of low-carbon hydrocarbon of more than 38 wt% and yield of p-xylene of more than 93 wt%. Therefore, the process belongs to low carbon technology with high efficiency in carbon source utilization.

Description

technical field [0001] The invention relates to a process for preparing p-xylene, in particular to a process for preparing p-xylene by using low-carbon alcohol ethers and low-carbon hydrocarbons, and belongs to the field of energy and chemical production. Background technique [0002] Paraxylene (PX) is a particularly important organic chemical raw material in aromatic hydrocarbons, and it is also one of the important basic petrochemical products. Polycondensation reaction is carried out to produce polymer material polyethylene terephthalate (polyester). Polyester is a polyester material with excellent performance and great demand. It is widely used in the fields of textile and packaging materials. [0003] The current production of PX is mainly obtained through petrochemical routes. This production method is very dependent on oil and is greatly affected by oil price fluctuations and supply. my country is a country short of oil and gas. Due to the shortage of crude oil reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/08C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 郭新宇刘述全苗晓涛唐家鹏
Owner 江苏煤化工程研究设计院有限公司
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