Apparatus and method of separating and purifying water solution of phenol, catechol, hydroquinone and tar

A hydroquinone and aqueous solution technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as difficult transportation and separation, easy carbonization or puffing, and poor fluidity, so as to ensure high purity And the effects of high yield, low risk of material heat sensitivity, and low concentration of phenolic water
CN1847209AInactive Publication Date: 2006-10-18TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2006-10-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses the apparatus and method of separating and purifying phenol, catechol, hydroquinone and tar in water solution. The apparatus includes a dewatering distillation tower with entry end, a first phenol eliminating distillation tower, a second phenol eliminating distillation tower, a tar eliminating distillation tower, a deep distilling caldron, and a product distillation tower. The separating process includes the following steps: feeding the materials successively into the apparatus for rectification separating, and exhausting catechol and p-benzenediol separately in the top and the bottom of the product distillation tower. Owing to the continuous five tower vacuum distillation and high efficiency packing tower technology, the present invention has the features of low phenol content, low operation temperature, etc.
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Description

technical field

[0001] The invention relates to a separation and purification device for phenol, o / hydroquinone and tar aqueous solution, and also relates to a separation and purification method for phenol, o / hydroquinone and tar aqueous solution. Background technique

[0002] Since the 1960s and 1970s, my country has started the development and research of the new production process of dihydric phenols. The relevant state departments have listed this project as a scientific and technological breakthrough in the "7.5", "8.5", and "9.5" project, the reaction process is becoming more and more mature, but because the separation of the solution after the reaction and the product purification technology are not up to standard, industrial production has not yet been formed. Domestic reports on the separation and purification technology of o- and hydroquinone are also limited to the test or small test stage.

[0003] For the separation and purification technologies of similar pheno...

Claims

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