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Production device and method for synthesizing musk xylene from by-products of gamma-lactone

A technology of musk xylene and a production method, which are applied in the chemical field, can solve the problems of incineration treatment polluting the environment, increase production costs, waste of resources, etc., and achieve the effects of simple synthesis steps and comprehensive utilization of by-product resources.

Pending Publication Date: 2021-04-02
ANHUI HYEA AROMAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a kind of production device and method for synthesizing xylene musk with gamma lactone by-product: starting with the by-product tert-butanol in the gamma lactone production process The raw material is chlorinated with hydrochloric acid to obtain tert-chlorobutane. In the presence of aluminum trichloride, chloro-tert-butane is condensed with m-xylene. 5-tert-butyl-m-xylene, with sulfuric acid as a catalyst, 5-tert-butyl-m-xylene is nitrated with nitric acid to obtain crude xylene musk, which is obtained after a series of separations and purifications such as neutralization washing, crystallization, and centrifugation to obtain 99 % xylene musk, which solves the waste of resources caused by the existing gamma-lactone by-products, increases production costs, and incinerates the problem of polluting the environment

Method used

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  • Production device and method for synthesizing musk xylene from by-products of gamma-lactone

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Embodiment 1

[0038] see figure 1 As shown, this embodiment is a production device for synthesizing xylene musk with gamma lactone by-products, including a gamma lactone reaction kettle 1, a spiral plate heat exchanger A2, a tert-butanol-water mixture receiving tank 3, tert-butanol-water mixture head tank 4, water separator 5, 80% tert-butanol head tank 6, hydrochloric acid head tank 7, dripping pump A8, chlorination reaction kettle 9, graphite condenser 10, dilute hydrochloric acid receiving tank 11, Washing kettle 12, chloro-tert-butane head tank 13, m-xylene head tank 14, dripping pump B15, condensation reaction kettle 16, 20% sodium hydroxide head tank 17, washing kettle A18, kettle distillation tower A19, spiral Plate heat exchanger B20, 5-tert-butyl-m-xylene vacuum receiving tank 21, 5-tert-butyl-m-xylene head tank 22, nitric acid head tank 23, sulfuric acid head tank 24, dripping pump C25, nitration reaction kettle 26 , washing kettle B27, filter 28, DMF high level tank 29, crystall...

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Abstract

The invention discloses a production device and method for synthesizing musk xylene from by-products of gamma-lactone, which comprises the steps of taking a by-product tert-butyl alcohol in the production process of gamma-lactone as an initial raw material, carrying out chlorination reaction with hydrochloric acid to obtain chlorotert-butane, carrying out condensation reaction on chlorotert-butaneand m-xylene in the presence of aluminum trichloride, recovering m-xylene by means of neutralization, washing and distillation to obtain 5-tert-butyl m-xylene, carrying out nitration reaction on the5-tert-butyl m-xylene and nitric acid by using sulfuric acid as a catalyst to obtain a musk xylene crude product, carrying out a series of separation and purification including neutralization, washing, crystallization, centrifuging and like to obtain 99% musk xylene. According to the invention, 80% tert-butyl alcohol and water azeotrope which are byproducts generated in the production process of gamma-lactone are used as initial raw materials, musk xylene is produced after chlorination, condensation and nitration reactions, the synthesis steps are relatively simple, and comprehensive utilization of byproduct resources is achieved.

Description

technical field [0001] The present invention relates to the field of chemical industry, in particular to a production device and method for synthesizing xylene musk with gamma lactone by-products, more specifically to a production device and method for synthesizing xylene musk with gamma lactone by-product resources comprehensive utilization method. Background technique [0002] The chemical name of xylene musk is 2,4,6-trinitro-1,3-dimethyl-5-tert-butylbenzene, CAS No. 81-15-2, and it is light yellow powder or needle crystal. [0003] The method for synthesizing xylene musk uses m-xylene as a starting material, first uses isobutylene to carry out tert-butylation to generate m-dimethyl tert-butylbenzene, and then uses a mixed acid composed of nitric acid and sulfuric acid to carry out nitration. [0004] In the production process of gamma lactone, it is necessary to use di-tert-butyl peroxide as the initiator of the addition reaction of acrylic acid and fatty alcohol, and t...

Claims

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Application Information

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IPC IPC(8): C07C201/08C07C201/16C07C205/06C07C2/86C07C7/04C07C15/02C07C17/16C07C17/38C07C19/01C07C29/09C07C31/12C07C407/00C07C409/16
CPCC07C201/08C07C201/16C07C2/861C07C7/04C07C17/16C07C17/38C07C29/09C07C407/00C07C2527/126C07C205/06C07C15/02C07C19/01C07C31/12C07C409/16
Inventor 王天义汪洋张政吴旭何云飞陈良杨曙光
Owner ANHUI HYEA AROMAS
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