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Production equipment and synthesis method of o-chlorobenzoic acid

A technology of o-chlorobenzoic acid and production equipment, which is applied in the chemical industry, can solve problems such as poor synthesis effects, and achieve the effects of fast reaction speed, short process flow, and high reaction conversion rate

Pending Publication Date: 2018-09-21
ZHEJIANG ALPHARM CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, one of the purposes of the present invention is to provide a kind of o-chlorobenzoic acid production equipment and synthetic method, which can solve the problem of poor synthetic effect

Method used

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  • Production equipment and synthesis method of o-chlorobenzoic acid
  • Production equipment and synthesis method of o-chlorobenzoic acid

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Embodiment Construction

[0029] 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. .

[0030] 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.

[0031] Un...

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Abstract

The invention discloses a synthesis method of o-chlorobenzoic acid. The synthesis method comprises the following steps: adding a mixed o-chlorobenzoic acid solution and o-chlorotoluene and inflating oxygen obtained by vaporizing liquid oxygen into a reactor, detecting the pressure in the reactor by using a gas pressure detecting instrument, reacting at a temperature of 125-180 DEG C after a requirement is met, condensing and stratifying o-chlorotoluene vapor by using a condenser and a water segregator, removing water, reflowing the o-chlorotoluene into the reactor, and when the content of theo-chlorobenzoic acid reaches 98.5%, discharging and passing through subsequent treatment equipment. By the synthesis method, a technological process is short, the yield is high, the cost is low, the environment pollution is low, pure oxygen replaces air, the reaction speed is high, and basically no waste gas is discharged; a solvent is not required during the reaction, a large amount of wastewaterin a diazotization method and a chlorination hydrolysis method is avoided, and an oxidation technology is greatly improved, the reaction conversion rate is high, the selectivity is good, and the crude product content is high.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a production equipment and synthesis method of o-chlorobenzoic acid. Background technique [0002] 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 are used as glue It can also be used as a preservative for adhesives and paints, and can also be used as raw materials for organic synthesis, fuels and color films, and its market prospects are relatively broad. [0003] There are many ways to synthesize o-chlorobenzoic acid, mainly ...

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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