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A kind of continuous production device and method of cartap intermediate thiocyanide

A technology of thiocyanide and production method, applied in the direction of organic chemistry, etc., can solve the problem of low reaction yield of production method, achieve the effect of reducing the occurrence of reverse reaction, increasing yield and reducing contact time

Active Publication Date: 2020-08-11
HUNAN HAOHUA CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The main purpose of the present invention is to provide a continuous production device and method for cartap intermediate thiocyanide, to solve the problem of low reaction yield of cartap intermediate thiocyanide production mode in the prior art

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Embodiment Construction

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully and in detail below in conjunction with the accompanying drawings and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0027] Unless otherwise defined, all technical terms used hereinafter have the same meanings as commonly understood by those skilled in the art. "First", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only for the convenience of distinguishing corresponding components. Likewise, words like "a" or "one" do not indicate a limitation of quantity, but indicate that there is at least one. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indire...

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Abstract

The invention discloses a continuous production device and method of a cartap intermediate thiocyanide. The continuous production device comprises a charging unit, a reacting unit and a postprocessingunit which are sequentially connected, wherein the reacting unit comprises a first-stage tubular reactor and a second-stage tubular reactor; a first-stage water phase outlet is formed in the upper part of the first-stage tubular reactor; a first-stage oil phase outlet is formed in the bottom of the first-stage tubular reactor; a second-stage water phase feeding opening is formed in the lower partof the second-stage tubular reactor; a second-stage oil phase feeding opening and a second-stage water phase outlet are formed in the upper part of the second-stage tubular reactor; a second-stage oil phase outlet is formed in the bottom of the second-stage tubular reactor; the first-stage water phase outlet communicates with the second-stage water phase feeding opening through a pipeline; and the first-stage oil phase outlet communicates with the second-stage oil phase feeding opening through a pipeline. Through the adoption of the continuous production device and the method disclosed by theinvention, the contact of sodium sulfite with the thiocyanide can be effectively reduced, a reverse reaction is restrained, and the reaction yield is increased.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a continuous production device and method for cartap intermediate thiocyanide. Background technique [0002] Cartap is a derivative of nereistoxin. It has strong stomach poisoning effect, and has contact killing, certain antifeedant and egg killing effects. It knocks down pests quickly, has a long residual period, and has a wide insecticidal spectrum. Control rice planthopper, rice hailworm, peach borer, diamondback moth, cabbage caterpillar, corn borer, potato tuber moth and other pests, and has special effects on rice borer. [0003] The traditional production method of cartap intermediate thiocyanide is a batch production method, that is, after dichloroethane and sodium cyanide are put into the reaction kettle, the aqueous solution of monosultap with adjusted pH value is added dropwise for about 2 hours, and then added dropwise After the completion, keep warm at 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C331/12
CPCC07C331/12
Inventor 袁美和艾秋红陈雪松何小明
Owner HUNAN HAOHUA CHEM
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