Method for producing 2,6-dimethylnaphthalene by using amylene in fischer-tropsch reaction product

Abstract

The invention relates to a method for producing 2,6-dimethylnaphthalene by using amylene in a fischer-tropsch reaction product, and the method is mainly used for solving the technical problem of how to produce a chemical product 2,6-dimethylnaphthalene which is in shortage in the market at present by using amylene in a fischer-tropsch product. In the method, a fischer-tropsch amylene separation unit, an alkylation unit, a dehydrocyclization unit, an isomerization unit and a separation unit are adopted, and the method comprises the following steps: through a five-step method, firstly, separating out amylene from the fischer-tropsch reaction product, carrying out alkylation reaction on olefin and benzene-series arene, carrying out dehydrocyclization reaction on the product subjected to the alkylation reaction, so as to generate naphthalene-series arene; separating out 2,6-dimethylnaphthalene by virtue of the separation unit; and converting dimethylnaphthalene of a non-target product into 2,6-dimethylnaphthalene of a target product through isomerization reaction, and then recycling in the separation unit again. According to the system, the technical problem of how to produce the 2,6-dimethylnaphthalene by using amylene in the fischer-tropsch reaction product is relatively well solved; and the method can be applied to industrial production of 2,6-dimethylnaphthalene.

Description

technical field [0001] The invention relates to a method for producing 2,6-dimethylnaphthalene by using pentene in the Fischer-Tropsch reaction product, in particular to a method for producing 2,6-dimethylnaphthalene with pentene and benzene series aromatics in the Fischer-Tropsch reaction product as raw materials. 6-Dimethylnaphthalene method. Background technique [0002] 2,6-naphthalene dicarboxylate (PEN), which is prepared by condensation of 2,6-naphthalene dicarboxylic acid (2,6-NDCA) and ethylene glycol, is a new type of polyester material. Compared with the traditionally used polyethylene terephthalate (PET), PEN has better gas barrier properties, heat resistance, chemical stability and radiation resistance, and has great potential in the market. However, the main reason restricting the large-scale entry of PEN into the market is the shortage of raw materials for the production of 2,6-naphthalene dicarboxylic acid, which leads to the high price of PEN. 2,6-Naphthal...

AI Technical Summary

Problems solved by technology

The invention provides a method for producing 2,6-dimethylnaphthalene by using pentene in the Fischer-Tropsch reaction product, by separating the Fischer-Tropsch pentene unit, alkylation unit, cyclodehydrogenation unit, and isomerization unit , the combination of 2,6-dimethylnaphthalene separation unit, the method of producing high-purity 2,6-dimethylnaphthalene products, solves the utilization of pentene generated by Fischer-Tropsch reaction and the production of 2,6-dimethylnaphthalene Problems with naphthalene products

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