Pesticide mother liquid, and preparation method and application thereof

Abstract

A provided pesticide mother liquid comprises, in percent by weight, 1%-20% of n active composition A, 1%-98% of one solvent B selected from C8-C19 low alkane solvents, 1%-98% of one or more cosolvents C selected from diethyl phthalate, diisopropyl adipate, dibutyl adipate, epoxy soybean oil, epoxidized fatty acid methyl esters, soybean oil, isopropyl myristate, tributyl citrate, dimethyl carbonate, n-butanol, n-amyl alcohol and n-octyl alcohol; and the active composition A is a pyrethroid compound shown as a formula (X1). The pesticide mother liquid solves multiple technological problems that the active composition A is difficult to dissolve in low alkane solvents and generates a large amount of impurities after being dissolved and influences downstream usage.

Description

technical field [0001] The invention relates to an insecticide mother liquor and its preparation method and application. Background technique [0002] D-2,2-Dimethyl-3-trans-(2,2-dichlorovinyl)cyclopropanecarboxylic acid-(s)-2-methyl-3(2-propargyl)-4 -Oxo-cyclopent-2-enyl ester is a new type of pyrethroid, referred to as D-trans permethrin, hereinafter referred to as compound A, the activity of this compound is higher than that of ordinary d-transmethrin 10 times, but due to factors such as its own solubility, it has not been widely promoted. When compound A is applied on the market, it is difficult to dissolve the original drug and derivative impurities. Generally, it is difficult to dissolve compound A and derivative impurities with alkane series solvents, even if some other types of solvents can be used to dissolve the compound A and its dissolution, but because compound A is normally used in aerosols, and propylene butane is often used as filling gas in aerosols, even ...

AI Technical Summary

Problems solved by technology

When compound A is applied in the market, it is difficult to dissolve the original drug and derivative impurities. Generally, it is difficult to dissolve compound A and derivative impurities with alkane series solvents, even if some other types of solvents can be used to dissolve the compound A and its dissolution, but because compound A is normally used in aerosols, and propylene butane is often used as filling gas in aerosols, even if other types of solvents are used to dissolve, wait until it is filled into the aerosol can, because Subtle differences between compound A and derivative impurities, derivative impurities will slowly precipitate out over a long period of time, and even cause the precipitation of the original drug, resulting in clogged nozzles, making it difficult to promote the compound in aerosols

Therefore, the application of compound A will encounter the problem that the derivative impurities are difficult to separate and remove from the original drug in the mother liquor, and it is difficult to solve the problem of slow precipitation in the aerosol tank for a long time only by solvent dissolution

At present, it is understood that some companies using compound A use repeated adsorption, which not only produces a large amount of solid waste of clay or activated carbon, but also leads to the waste of some original drugs, and the final removal of impurities is not very thorough.

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