A kind of preparation method of 1-naphthylacetic acid

A technology of naphthaleneacetic acid and chloroacetic acid, which is applied in the field of preparation of 1-naphthaleneacetic acid, can solve the problems of reducing production costs, achieve the effects of reducing production costs, solving recycling problems, and reducing production
CN111153787BActive Publication Date: 2022-06-24浙江大鹏药业股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
浙江大鹏药业股份有限公司
Publication Date
2022-06-24

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Abstract

The invention belongs to the field of pesticide synthesis, and in particular relates to a preparation method of 1-naphthaleneacetic acid. The method specifically comprises: adding naphthalene and chloroacetic acid into a reactor for reaction to obtain a mixture containing 1-naphthaleneacetic acid and excess chloroacetic acid; performing solid-liquid separation on the mixture to obtain 1-naphthaleneacetic acid and a mother liquor; the mother liquor circulation To the above reaction; when the naphthalene is fed, it is in a molten liquid state, and the chloroacetic acid is in a gaseous state. The method for continuously producing 1-naphthaleneacetic acid of the present invention greatly reduces the generation of by-products, solves the problem of excessive chloroacetic acid recovery, is highly efficient and environmentally friendly, saves complicated separation steps, greatly reduces production costs, and is suitable for large-scale continuous production. Production of 1-naphthylacetic acid.
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Description

technical field

[0001] The invention belongs to the field of pesticide synthesis, in particular to a preparation method of 1-naphthaleneacetic acid. Background technique

[0002] 1-Naphthylacetic acid is a broad-spectrum plant growth regulator, which can rapidly promote cell division and expansion (fruit swelling agent, expandin, induce the formation of adventitious roots (rooting agent), and can regulate growth, promote rooting, flowering, prevent Falling flowers and fruits, forming seedless fruit, promoting early maturity, increasing yield, etc., and at the same time, after use, it can also enhance the plant's ability to resist drought, cold, salinity, disease, and dry and hot wind. It is a broad-spectrum, high-efficiency, low- Toxic plant growth regulator.

[0003] There are many synthetic methods of 1-naphthaleneacetic acid. The first method is the condensation of naphthalene with chloroacetic acid to obtain naphthaleneacetic acid (Ogata Y, Ishiguro J.Preparation ofα-N...

Claims

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