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The refining method of monosultap in the synthesis process of monosultap

A technology of synthesis process and refining method, which is applied in the field of pesticides and can solve the problems of low content of monosultap

Active Publication Date: 2016-10-05
HUNAN GOFAR FINE CHEM IND TECH CO LDT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a method for refining monosultap in the monosultap synthesis process in view of the low content of monosultap in the finished product produced by the traditional monosultap synthesis process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Dissolve 1.25 tons of monosultap crude product in 2000L of 60% methanol aqueous solution to obtain a mixed solution, wherein the mass content of monosultap in the crude monosultap is 85%. The above mixed solution was crystallized and centrifuged to obtain mother liquor and crystals. The above-mentioned crystals were dried to obtain 800 kg of monosultap fine product with a mass content of 98% and a yield of 90%.

Embodiment 2

[0041] The mother liquor in Example 1 was mixed with methanol to obtain a 2000L solution.

[0042] Dissolve 1.25 tons of monosultap crude product in the above solution to obtain a mixed solution, wherein the mass content of monosultap is 85%. The above mixed solution was crystallized and centrifuged to obtain mother liquor and crystals. The above crystals were dried to obtain 1000 kg of monosultap with a mass content of 97% and a yield of 95%.

Embodiment 3

[0044] The fifth utilization of the mother liquor in Example 1 was mixed with methanol to obtain a 2000L solution.

[0045] Dissolve 1.25 tons of monosultap crude product in the above solution to obtain a mixed solution, wherein the mass content of monosultap is 85%. The above mixed solution was crystallized and centrifuged to obtain mother liquor and crystals. The above-mentioned crystals were dried to obtain 1000 kg of monosultap with a mass content of 95.5% of monosultap, and the yield was 95%.

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PUM

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Abstract

The invention provides a method for refining monosultap in a monosultap synthetic process. The method comprises the following steps: providing a to-be-refined monosultap crude product; dissolving the monosultap crude product in a solution, thereby obtaining a mixed solution; crystallizing and centrifuging the mixed solution, thereby obtaining a mother solution and a crystal; and drying the crystal, thereby obtaining the refined monosultap. According to the method for refining monosultap in the monosultap synthetic process, the monosultap crude product is dissolved, crystallized, centrifuged and dried, and the mass percent of the monosultap in the obtained refined monosultap is over 95 percent.

Description

technical field [0001] The invention relates to the field of pesticides, in particular to a method for refining monosultap in the synthesis process of monosultap. Background technique [0002] Insultap is an artificially synthesized nereistin analogue, which can be rapidly converted into nereistin or dihydronereistin in insects. Monosultap is a competitive inhibitor of acetylcholine, which has strong contact killing, stomach poisoning and systemic conduction effects, and has a good control effect on the larvae of Lepidoptera pests. It is a bionic pesticide with little impact on natural enemies and no resistance. Non-toxic, harmless, and non-polluting to the environment, it is an ideal agent for comprehensive pest management. Monosultap can effectively control a variety of pests on rice, vegetables, wheat, corn, tea, fruit trees and other crops, especially has special effects on rice leaf rollers, rice stem borers, and three stem borers, and has low toxicity to fish , but h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C381/02
Inventor 陈珍陈儒贵闾忠贤黎辉良王仲亮
Owner HUNAN GOFAR FINE CHEM IND TECH CO LDT
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