77.5% dichlorvos missible oil and preparation method thereof

Abstract

The invention belongs to the technical field of preparation of pesticide preparations, and particularly relates to 77.5% dichlorvos missible oil and a preparation method thereof. The dichlorvos oil suspending agent is prepared from the following raw materials: 84-86% of 90% dichlorvos crude oil, 13-50% calcium dodecylbenzene sulfonate, 2-5% of styrylphenol polyoxyethylene ether and 6-10% of sec-butyl acetate, and the raw materials also comprise dimethyl carbonate and rosin-based vegetable oil. The 77.5% dichlorvos missible oil disclosed by the invention is qualified in emulsibility and improved in pesticide effect; wherein the sec-butyl acetate, the dimethyl carbonate and the rosin-based vegetable oil are used as solvents, so that the problem that the emulsibility of dichlorvos is unqualified for a long time is solved, and the quality is improved in a breakthrough manner; besides, the suspending agent has strong dissolving power and good permeability, and can improve the efficacy of dichlorvos.

Description

technical field [0001] The invention belongs to the technical field of preparation of pesticide preparations, and in particular relates to a 77.5% dichlorvos emulsifiable concentrate and a preparation method thereof. Background technique [0002] Dichlorvos is a high-efficiency, low-residue broad-spectrum insecticide with contact, stomach poisoning and fumigation effects; it is currently the main agent for the control of grain and cotton, fruit trees, vegetables, warehouses and household hygiene. Because dichlorvos is difficult to dissolve in water, it is mixed into emulsifiable concentrate and sold as a commodity, that is, commercial dichlorvos emulsifiable concentrate contains solvent and emulsifier in addition to the solute dichlorvos. [0003] At present, domestic pesticide emulsifiable concentrate preparations basically need to use organic solvents such as aromatic hydrocarbons. These organic solvents mainly include benzene, toluene, xylene, methanol, etc., and the annu...

AI Technical Summary

Problems solved by technology

In terms of the substitution of benzene solvents, domestically, at present, the high-boiling point heavy aromatics solvent oil with a slightly higher flash point (C 10 -C 14 ), although the safety has been improved and the toxicity to humans has been reduced, but because aromatics are difficult to degrade, their environmental protection performance is still not high

[0005] The formula of 77.5% dichlorvos emulsifiable concentrate used in the prior art is made up of dichlorvos crude oil, solvent toluene, emulsifier (mixed benzene + emulsifier 500# + emulsifier 602#), and there are many problems: (1) the emulsifying property is unqualified; (2) High cost and greatly affected by oil fluctuations; (3) Not environmentally friendly and harmful to workers and the environment

According to the upcoming "Implementation Plan for Restricting the Use of Harmful Solvents in Pesticide EC Products", the use of toluene, xylene, methanol, DMF and other harmful solvents is restricted, and the policy is restricted

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