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O-chlorobenzoic acid production equipment and synthesis method

A technology of o-chlorobenzoic acid and production equipment, applied in the chemical field, can solve problems such as poor synthesis effect, and achieve the effects of fast reaction speed, high crude product content and good selectivity

Pending Publication Date: 2021-10-29
ZHEJIANG ALPHARM CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] One of purpose of the present invention is to provide a kind of o-chlorobenzoic acid production equipment and synthetic method, to solve the problem that above-mentioned prior art exists, can solve the problem of poor synthetic effect, and effectively avoid the generation of a large amount of waste water and waste gas

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  • O-chlorobenzoic acid production equipment and synthesis method

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Embodiment Construction

[0031] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

[0032] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or there can also be an intervening component. When a component is said to be "connected" to another component, it may be directly connected to the other component or there may be intervening components at the same time. When a component is said to be "set on" another component, it may be set directly on the other component or there may be an intervening component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

[0033] Un...

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Abstract

The invention discloses an o-chlorobenzoic acid synthesis method which comprises the following steps: adding an o-chlorobenzoic acid mixed solution and o-chlorotoluene into a reactor, introducing oxygen after liquid oxygen vaporization, detecting the pressure in the reactor through an air pressure detection instrument, reacting at 125-180 DEG C after the pressure in the reactor meets the requirement, condensing and layering o-chlorotoluene steam through a condenser and a water separator, removing water, and refluxing the o-chlorotoluene into the reactor, and discharging and passing through subsequent treatment equipment when the content of the o-chlorobenzoic acid reaches 98.5 percent, wherein the process flow is short, the yield is high, the cost is low, the environmental pollution is small, pure oxygen replaces air, the reaction speed is high, and no waste gas is discharged basically; and the reaction does not need a solvent, a large amount of wastewater generated by a diazotization method and a chlorination hydrolysis method is avoided, the oxidation process is greatly improved, the reaction conversion rate is high, the selectivity is good, and the crude product content is high.

Description

[0001] This application is a divisional application of the invention patent named "o-chlorobenzoic acid production equipment and synthesis method"; the application number of the parent application is: CN201810450696.6; the application date of the parent application is: 2018.05.11. technical field [0002] The invention relates to the field of chemical industry, in particular to a production equipment and synthesis method of o-chlorobenzoic acid. Background technique [0003] O-chlorobenzoic acid is an important intermediate in the pesticide, pharmaceutical and fuel industries with a wide range of uses. It is mainly used in the synthesis of insecticides (Suurea No. 1) and antifungal agents in pesticides, and it is mainly synthesized in medicine. The antipsychotic drug perphenazine, the adrenaline drug Zengrubensin and Chuantong, the antifungal drug clotrimazole, chlorpromazine, ketamine and diclofenac are standard reagents for the reduction method and iodometric method, and ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/265C07C63/70
CPCC07C51/265C07C63/70
Inventor 沈纪达张骏韩明磊
Owner ZHEJIANG ALPHARM CHEM TECH
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