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Sodium dodecyl benzene sulfonate aqueous solution and preparation method thereof and application thereof

A technology of sodium dodecylbenzenesulfonate and dodecylbenzenesulfonic acid, which is applied in the field of sodium dodecylbenzenesulfonate aqueous solution and its preparation, can solve the problems of low content of liquid aqueous solution and achieve strong hydrophilicity , good emulsification, and the effect of expanding the scope of use

Active Publication Date: 2010-01-27
QINGDAO STAR CROPSCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Though the production patent report of more sodium dodecylbenzene sulfonate is arranged so far, it is all low content (<30%) aspect liquid aqueous solution, the preparation and use of the aqueous solution of high content, especially in microemulsion Application has not found reports

Method used

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  • Sodium dodecyl benzene sulfonate aqueous solution and preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of 1000g content is 30% sodium dodecylbenzenesulfonate aqueous solution:

[0017] Weigh 281g of dodecyl sulfonic acid in the reaction kettle, add 323.5g of water, stir for 20 minutes, control the temperature at 50°C, and dissolve 72g of sodium bicarbonate in 323.5g of water, keep the temperature at 25°C, at about 2 Slowly add the sodium bicarbonate solution dropwise into the acid within one hour, and react for four hours to prepare an aqueous solution of sodium dodecylbenzenesulfonate.

[0018] Application in the preparation of 15% cyhalothrin microemulsion:

[0019] Cyhalothrin technical: 15%, toluene: 8%, 70% aqueous solution of dodecylbenzenesulfonic acid: 6%, 1600#: 9%, and the balance is water.

[0020] Weigh 15.79g of 95% cyhalothrin former powder (or crude oil), dissolve completely with 8g toluene, add 6g70% dodecylbenzenesulfonic acid aqueous solution and 9g1600# emulsifier, stir evenly, make oil phase, Then add 61.21 g of deionized water and stir ...

Embodiment 2

[0022] Preparation of 1000g content is 50% sodium dodecylbenzenesulfonate aqueous solution:

[0023] Weigh 468g of dodecyl sulfonic acid into a reaction flask, add 217g of water and 35g of methanol, stir for 20 minutes, control the temperature at 40°C, and dissolve 35g of sodium hydroxide and 22g of sodium bicarbonate in 217g of water, keeping the temperature at At 20°C, slowly add sodium hydroxide solution dropwise into the acid within about 2 hours, then add 6g of ethanolamine, and react for 3 hours to prepare an aqueous solution of sodium dodecylbenzenesulfonate.

[0024] Application in the preparation of 5% cyhalothrin microemulsion:

[0025] Cyhalothrin technical: 5%, toluene: 5%, 70% aqueous solution of dodecylbenzenesulfonic acid: 4%, 600#: 6%, and the balance is water.

[0026] Weigh 5.26g of 95% cyhalothrin former powder (or crude oil), dissolve completely with 5g toluene, add 4g70% dodecylbenzenesulfonic acid aqueous solution and 6g600# emulsifier, stir well, make o...

Embodiment 3

[0028] Preparation of 1000g content is 70% sodium dodecylbenzenesulfonate aqueous solution:

[0029] Weigh 656g of dodecyl sulfonic acid into a reaction flask, add 46g of water, 50g of n-butanol and 30g of acetone, stir for 20 minutes, control the temperature at 45°C, and dissolve 80g of sodium carbonate in 46g of water, keep the temperature at 30°C , Slowly add the sodium carbonate solution dropwise to the acid in about 2 hours, keep the temperature, and react for 5 hours to make an aqueous solution of sodium dodecylbenzenesulfonate.

[0030] Application in the preparation of 10% cyhalothrin microemulsion:

[0031] Cyhalothrin technical: 5%, toluene: 8%, 70% dodecylbenzenesulfonic acid aqueous solution: 7%, 700#: 8%, the balance is water

[0032] Weigh 5.26g of 95% cyhalothrin former powder (or crude oil), dissolve completely with 8g toluene, add 7g70% dodecylbenzenesulfonic acid aqueous solution and 8g700# emulsifier, stir well, make oil phase, Then add 71.74 g of deionize...

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Abstract

The invention belongs to the technical field of a pesticide adjuvant, in particular to sodium dodecyl benzene sulfonate aqueous solution and a preparation method thereof and application thereof. The technical solution of the invention is as follows: the sodium dodecyl benzene sulfonate aqueous solution is composed of the following components by weight percent: 28-65% of dodecylbenzene sulfonic acid, 6-8% of alkali, 0-8% of cosolvent and 0-1% of an additive and water, wherein, the alkali is one or combination of more than two of sodium carbonate, sodium bicarbonate and sodium hydroxide. The invention further provides a preparation method of the sodium dodecyl benzene sulfonate aqueous solution and application thereof. The aqueous solution has good emulsification, good wetting effect, good dispersibility, strong hydrophilicity, good aqueous solubility and strong applicability, so the aqueous solution can be taken as the additive of a microemulsion, an aqueous emulsion and the like for application to a water-based preparation made from pesticide, i.e. usage scope of the dodecylbenzene sulfonic acid is enlarged and usage amount of the additive of the microemulsification is reduced. Therefore, the aqueous solution is economical and environmental-friendly, and is a better modified product.

Description

technical field [0001] The invention belongs to the technical field of pesticide adjuvants, and in particular relates to an aqueous solution of sodium dodecylbenzenesulfonate, a preparation method and an application thereof. Background technique [0002] Sodium dodecylbenzenesulfonate is an anionic surfactant, which has the properties of decontamination, wetting, foaming, emulsification, dispersion, coagulation, degreasing and deinking that surfactants have, and has been widely used in mechanical electronics , petrochemical, paint plastics, agrochemical and other industries. Its structural formula is: [0003] [0004] In the pesticide formulation processing industry, dodecylbenzenesulfonic acid is basically solid, mainly used in solid formulations such as powders and water-dispersible granules, and its aqueous solution content is less than 30%, which is relatively low when used in water-based Preparations are very limited. It is the development trend of pesticides and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/30A01N53/08
Inventor 李国安张权
Owner QINGDAO STAR CROPSCI
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