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Continuous production method of azo reactive dye by using supergravity

A reactive dye, supergravity technology, applied in reactive dyes, azo dyes, chemical instruments and methods, etc., can solve the problems of difficult to achieve uniform temperature and mixing effect, large differences in dyes, and inconvenient application of post-processing dyes.

Active Publication Date: 2019-04-19
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

Due to the complexity of the organic reaction and the large volume of the stirred tank reactor, the temperature and mixing effect of the material are difficult to achieve uniformity in local areas, the production efficiency of the dye is low, and the batches of dyes produced by the batch stirred tank are quite different. , the post-processing of the dye and the application of the dye have brought inconvenience

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  • Continuous production method of azo reactive dye by using supergravity
  • Continuous production method of azo reactive dye by using supergravity
  • Continuous production method of azo reactive dye by using supergravity

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[0058] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0059] In industry, reactive azo dyes are carried out in batch operation in stirred tank reactors. Due to the complexity of the organic reaction and the large size of the stirred tank reactor, the temperature and mixing effect of the materials are difficult to achieve uniformity in local areas, the conversion rate and production efficiency of the dye are low, and the dyes produced by the batch stirred tank vary between batches. The difference is large, which brings inconvenience to the post-processing of the dye and the ap...

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Abstract

The invention provides a continuous production method of azo reactive dye by using supergravity. Firstly, a supergravity reactor is applied to a coupling reaction, which can greatly increase the reaction conversion rate and improve the quality of the product, and a spiral coil reactor is adopted for performing a diazotization reaction during the production. Compared with a current method that thediazotization reaction is performed by adopting a stirring tank reactor, the temperature rise of the system temperature can be accurately controlled, the diazotization reaction time is significantly shortened, the decomposition of diazonium salt is reduced to a large extent, and the industrial continuous production can be achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of azo reactive dyes. More specifically, it relates to a continuous production method of azo reactive dyes using supergravity. Background technique [0002] Industrially, the production of reactive azo dyes is carried out in batch operation in stirred tank reactors. Due to the complexity of the organic reaction and the large volume of the stirred tank reactor, the temperature and mixing effect of the material are difficult to achieve uniformity in local areas, the production efficiency of the dye is low, and the batches of dyes produced by the batch stirred tank are quite different. , the post-processing of the dye and the application of the dye have all brought inconvenience. [0003] Therefore, there is an urgent need to provide a continuous production method for azo reactive dyes using supergravity. Contents of the invention [0004] In view of this, in order to solve the current lack ...

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Application Information

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IPC IPC(8): C09B62/513
CPCC09B62/513
Inventor 陈建峰郭璇邹海魁孙宝昌初广文罗勇张亮亮
Owner BEIJING UNIV OF CHEM TECH
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