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Processing technology for extracting 2,4-dimethylphenol and 2,5-dimethylphenol

A technology of dimethylphenol and processing technology, which is applied to the processing technology of extracting 2.4-dimethylphenol and 2.5-dimethylphenol, and the field of extraction processing technology, can solve the problems of low purity, inconvenient use, poor quality and the like, Achieve the effect of improving processing purity and improving drying degree

Inactive Publication Date: 2019-12-13
巨野润佳化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing extraction process extracts 2.4-dimethylphenol and 2.5-dimethylphenol, the extraction purity may be low, the quality may be poor, and it is not convenient to use

Method used

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  • Processing technology for extracting 2,4-dimethylphenol and 2,5-dimethylphenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A processing technology for extracting 2.4-xylenol and 2.5-xylenol, said processing technology comprises the steps:

[0031] (1) Collection and aggregation of mixed xylenol, the mixed xylenol produced after coking cresol refining process is collected manually, so that the mixed xylenol is gathered in a 74L barrel container, and after being filled, the barrel-shaped The top of the container is closed by the lid;

[0032] (2) Multiple rectification and separation treatment, the primary rectification of mixed xylenol is carried out through the primary rectification tower, the rectification temperature is controlled at 111°C, and the primary separation is carried out, and the separated mixed xylenol passes through the secondary rectification tower Carry out the second rectification, the rectification temperature is controlled at 145°C, and the second separation is carried out, and then the obtained mixed xylenol is passed through the third rectification tower for the third ...

Embodiment 2

[0049] A processing technology for extracting 2.4-xylenol and 2.5-xylenol, said processing technology comprises the steps:

[0050] (1) Collection and aggregation of mixed xylenols, the mixed xylenols produced after the refining process of coking cresols are manually collected, so that mixed xylenols are gathered in a 97L barrel container, and after being filled, the barrel-shaped The top of the container is closed by the lid;

[0051] (2) Multiple rectification and separation treatment, the primary rectification of mixed xylenol is carried out through the primary rectification tower, the rectification temperature is controlled at 132°C, and the primary separation is carried out, and the separated mixed xylenol passes through the secondary rectification tower Carry out the second rectification, the rectification temperature is controlled at 168°C, carry out the second separation, and then pass the obtained mixed xylenol through the third rectification tower for the third recti...

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Abstract

The invention discloses a processing technology for extracting 2, 4-dimethylphenol and 2, 5-dimethylphenol. The processing technology comprises the following steps: collecting and gathering mixed xylenol; rectifying and separating for multiple times; carrying out alkylation reaction treatment; crystallizing and separating; taking out a crystal substance; drying the crystal substance in air, to bemore specific, after the crystal substance is air-dried, an open disc is manually brushed, so that the crystal substance is gathered and accumulated in the center of the open disc, and is manually scooped up and put into a packaging bag; and packaging the crystal substance, to be more specific, the packaged bag is packaged by a hot-pressing sealing packaging machine. The processing technology is reasonable in structure, by carrying out rectification, alkylation reaction and crystallization separation treatment, the processing purity of the 2, 4-dimethylphenol and the 2, 5-dimethylphenol is improved, the purification and separation content of the 2, 4-dimethylphenol and the 2, 5-dimethylphenol can reach 99.5% or above, the quality is high, the surface drying degree can be improved through air drying treatment, and sealing protection can be conducted through packaging.

Description

technical field [0001] The invention relates to an extraction process, in particular to a process for extracting 2.4-dimethylphenol and 2.5-dimethylphenol, belonging to the technical field of extraction and application of 2.4-dimethylphenol and 2.5-dimethylphenol . Background technique [0002] The refined processing of coking cresol can produce mixed xylenol; various xylenol isomers such as 3.4-xylenol and 3.5-xylenol can be separated and extracted from mixed xylenol, which can be used to prepare a variety of chemical It can also be directly used to produce phenolic resin and plasticizer without separation. [0003] When the existing extraction process extracts 2.4-dimethylphenol and 2.5-dimethylphenol, the extraction purity may be low, the quality may be poor, and it is inconvenient to use. Therefore, a kind of processing technique of extracting 2.4-xylenol and 2.5-xylenol is proposed in view of the above problems. Contents of the invention [0004] The object of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/70C07C37/68C07C39/07
CPCC07C37/685C07C37/70C07C39/07
Inventor 王希德马昭群
Owner 巨野润佳化工有限公司