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Green synthesis technique of p-chloro-m-cresol

A green synthesis technology of p-chloro-m-cresol, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of large amount of neutralization and washing wastewater, restrictions on industrial production, and long reaction time. Achieve the effects of short reaction time, high degree of automation, and high solvent recovery rate

Active Publication Date: 2014-09-17
JIANGSU HUANXIN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing process has the characteristics of long reaction time (16-48h), difficult separation, and a large amount of neutralization and washing wastewater, which restricts industrial production

Method used

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  • Green synthesis technique of p-chloro-m-cresol
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  • Green synthesis technique of p-chloro-m-cresol

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 Shown, described technological process comprises the following steps:

[0033] S1: After m-cresol and tetrachlorethylene are mixed through a static mixer (not shown) at a flow rate of 1mol / s:0.5mol / s, then enter the first tubular reactor 101, and sulfuryl chloride is The flow rate of 0.85mol / s is passed into the first tubular reactor 101 with a distributor interface (not shown), and the reaction temperature is controlled at 35°C-25°C to carry out the first chlorination reaction (first-order reaction). The tetrachlorethylene solvent added in the present invention can keep the reaction system in the liquid phase state all the time during the reaction process, and also has a dilution effect on the reaction product at the same time, can delay the reaction speed, improve the selectivity, and make the reaction more stable through the dispersion effect of the solvent , reduce the reaction rate, and then make the reaction more fully, greatly improving the conv...

Embodiment 2

[0040] Such as figure 1 Shown, described technological process comprises the following steps:

[0041]S1: after m-cresol and tetrachlorethylene are mixed in the static mixer with the flow of 1mol / s:1mol / s, then enter in the first tubular reactor 101, pass sulfuryl chloride by 0.85mol / s flow Enter into the first tubular reactor 101 with a distributor interface, control the reaction temperature at 35°C-25°C, and carry out the first chlorination reaction (first-order reaction). The tetrachlorethylene solvent added in the present invention can keep the reaction system in the liquid phase state all the time during the reaction process, and also has a dilution effect on the reaction product at the same time, can delay the reaction speed, improve the selectivity, and make the reaction more stable through the dispersion effect of the solvent , reduce the reaction rate, and then make the reaction more fully, greatly improving the conversion rate of m-cresol. Adding sulfuryl chloride ...

Embodiment 3

[0048] Such as figure 1 Shown, described technological process comprises the following steps:

[0049] S1: After m-cresol and tetrachlorethylene are mixed through the static mixer at a flow rate of 1mol / s:1.5mol / s, then enter the first tubular reactor 101, and sulfuryl chloride is mixed at a flow rate of 0.85mol / s Pass it into the first tubular reactor 101 with a distributor interface, control the reaction temperature at 35°C-25°C, and carry out the first chlorination reaction (first-order reaction). The tetrachlorethylene solvent added in the present invention can keep the reaction system in the liquid phase state all the time during the reaction process, and also has a dilution effect on the reaction product at the same time, can delay the reaction speed, improve the selectivity, and make the reaction more stable through the dispersion effect of the solvent , reduce the reaction rate, and then make the reaction more fully, greatly improving the conversion rate of m-cresol. ...

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Abstract

The invention provides a green synthesis technique of p-chloro-m-cresol, which comprises the following step: reacting by using m-cresol as a raw material, tetrachloroethylene as a solvent and sulfuric chloride as a chlorinating agent to prepare the p-chloro-m-cresol, wherein the mole ratio of the m-cresol to the tetrachloroethylene is 1:(0.5-1.5), and the mole ratio of the m-cresol to the sulfuric chloride is 1:(0.9-1.1).Compared with the prior art, the technique provided by the invention has the advantages of short reaction time, high solvent recovery rate, clean and environment-friendly production process and high degree of automation, and the m-cresol conversion rate after the reaction finishes is up to 98%; and thus, the technique has favorable industrialization prospects.

Description

technical field [0001] The invention relates to a chlorination process in a chemical process, in particular to a synthesis process of p-chloro-m-cresol. Background technique [0002] p-chloro-m-cresol (C 7 h 7 ClO) is a raw material for organic synthesis, a colorless liquid with a melting point of 66-68°C and a boiling point of 196°C. It is insoluble in water and easily soluble in benzene, ether, ethanol, acetone, chloroform and petroleum ether. . [0003] 4-Chloro-m-cresol is a low-toxicity and high-efficiency fungicide, mainly used in organic synthesis, can be used as a film preservative, and used as a disinfectant in poultry and other fields. It can also be used as an industrial antifungal agent in leather, adhesives, coatings, papermaking and other fields. The bactericidal activity is higher in acidic environment than in alkaline environment. Use a higher concentration of 0.2% as a bactericidal disinfectant. Use a lower concentration of 0.05 to 0.1% as a bacteriost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/62C07C39/28
CPCC07C37/62C07C39/28
Inventor 陈健明崔迎祥朱汉文颜勇庄磊
Owner JIANGSU HUANXIN NEW MATERIAL CO LTD
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