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A kind of preparation method of emulsifier and its use in preparing pesticide emulsifiable concentrate

An emulsifier and bimetallic catalyst technology, applied in chemical instruments and methods, botanical equipment and methods, applications, etc., can solve the problem of poor emulsification and dispersion effects of emulsifiers, inability to store stably for a long time, and the addition of emulsifiers and organic solvents. Large and other problems, to achieve the effect of less emulsifier and organic solvent, good emulsifying and dispersing effect, and good fluidity

Active Publication Date: 2022-03-22
JIAHUA CHEM TECH DEV SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the emulsifier prepared by the emulsifier preparation method in the prior art, which has poor emulsification and dispersion effects, cannot be stored stably for a long time, and has a large amount of emulsifier and organic solvent. A kind of emulsifying and dispersing effect is good, can store stably for a long time, the preparation method of a kind of economical and environment-friendly emulsifying agent that needs emulsifying agent and organic solvent amount is little and its use in preparing pesticide emulsifiable concentrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a kind of preparation method of emulsifier, comprising,

[0034]S1. Using 100kg of n-hexanol as an initiator, the temperature was raised to 140°C after nitrogen replacement, and under the catalysis of 0.13kg of zinc-cobalt double metal cyanide complex catalyst, 2510kg of a mixture of propylene oxide and butylene oxide was added for reaction. The mass ratio of propylene oxide to butylene oxide is 0.6, the reaction temperature is 140° C., and the polymer intermediate is obtained after aging and degassing.

[0035] S2. Under the action of 18.4kg of sodium hydride, the polymer intermediate obtained in S1 is subjected to a capping reaction with 1673kg of ethylene oxide. The temperature of the capping reaction is 120°C, ripened and degassed, and then cooled to 70°C and then added with lactic acid Neutralization is carried out, and the pH after neutralization is 6, and finally 4283kg of emulsifier is obtained.

[0036] This embodiment also provides th...

Embodiment 2

[0038] This embodiment provides a kind of preparation method of emulsifier, comprising,

[0039] S1. Put 100kg of propanol as an initiator, put it into the reactor together with 0.06kg of zinc-cobalt double metal cyanide complex catalyst, replace it with nitrogen and raise the temperature to 120°C, add propylene oxide and butylene oxide into the reactor A mixture of 4230kg of alkanes was reacted, wherein the mass ratio of propylene oxide to butylene oxide was 0.1, and the reaction temperature was 120°C. After aging and degassing, a polymer intermediate was obtained.

[0040] S2, add 4kg metal sodium catalyst to the reaction kettle, under the catalysis of metal sodium, the polymer intermediate obtained in S1 is subjected to capping reaction with 3490kg ethylene oxide, the temperature of the capping reaction is 110°C, the aging After cooling to 60°C, add acetic acid for neutralization. After neutralization, the pH is 7, and finally 7820kg of emulsifier is obtained.

[0041] The...

Embodiment 3

[0044] This embodiment provides a kind of preparation method of emulsifier, comprising,

[0045] S1. Put 100kg of n-butanol as the initiator, and put it into the reactor together with 0.31kg of zinc-cobalt double metal cyanide complex catalyst. After nitrogen replacement, the temperature is raised to 180°C, and propylene oxide and epoxy are added to the reactor. A mixture of 3370 kg of butane was reacted, wherein the mass ratio of propylene oxide to butylene oxide was 1.2, and the reaction temperature was 180° C. After ripening and degassing, a polymer intermediate was obtained.

[0046] S2. Add 42.7kg of sodium hydroxide catalyst to the reactor, and carry out capping reaction with 1872kg of ethylene oxide with the polymer intermediate obtained in S1 under the catalysis of sodium hydroxide. The temperature of the capping reaction is 150°C , aging and degassing, after cooling down to 100°C, citric acid was added for neutralization, the pH after neutralization was 5, and finally...

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Abstract

The present invention provides a preparation method of an emulsifier and its use in the preparation of pesticide emulsifiable concentrates. The present invention also provides a composite emulsifier comprising the emulsifier. The above preparation method includes, S1, using straight-chain alkanol as the starting agent, under the catalysis of a bimetallic catalyst, a mixture of propylene oxide and butylene oxide is added to react to obtain a polymer intermediate; S2, the polymer intermediate is mixed with ethylene oxide under the action of an alkali catalyst Alkanes carry out capping reaction, add neutralizing agent and carry out neutralization, obtain emulsifier; Wherein, the mass ratio of described propylene oxide and butylene oxide is 0.1-1.2, by limiting the addition sequence of each component, propylene oxide The mass ratio to butylene oxide is 0.1-1.2, and specific additives are selected for compounding, so that the emulsifier has good emulsification and dispersion effects, and can be stored stably for a long time. When preparing pesticide emulsifiable concentrates, the required emulsifier And less organic solvent, more economical and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of emulsifiers, in particular to a method for preparing emulsifiers and their use in preparing pesticide emulsifiable concentrates. Background technique [0002] As a large agricultural country, China has a huge market demand for pesticide EC. As an important component of pesticide emulsifiable concentrates, emulsifiers are used to make pesticide emulsifiable concentrates exist stably for a long time without flocculent precipitation, and when used in agricultural production, they can effectively reduce surface tension and significantly increase wetting, The functions of emulsification, dispersion and penetration can enhance the spreading and adhesion on plants, thereby improving the efficacy of pesticides. [0003] The emulsification effect of nonionic emulsifiers depends on the appropriate proportion of hydrophilic groups and hydrophobic groups. The conventional reaction mechanism is that propylene oxide (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C09K23/42C09K23/00A01N25/04
CPCC08G65/2609A01N25/04C09K23/00C09K23/018
Inventor 方文化魏会何新耀李玉博
Owner JIAHUA CHEM TECH DEV SHANGHAI CO LTD