Dichloro quinolinic acid, its preparation method and solid preparation thereof

A technology of quinclorac acid salt and quinclorac potassium salt, which is applied in the field of quinclorac acid salt and its preparation, can solve the problems of low solubility and achieve the effects of high solubility, easy absorption, and large herbicidal spectrum

Inactive Publication Date: 2006-07-19
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcoming of the existing quinclorac original drug with low solubility in water, the invention provides a kind of quinclorac

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 500Kg of quinclorac original drug with a purity of 85% into a 3000L enamel reaction kettle with a water content of 1400Kg, stir, add liquid caustic soda with a purity of 30%, and add 250Kg to carry out a salt-forming reaction, and then use a 2000L suction filter tank Filter, then dry with airflow dryer, obtain quinclorac sodium salt wet product 600Kg after filtering, obtain the former medicine finished product 420Kg of quinclorac sodium salt after drying; Filtrate is the product of quinclorac sodium salt The saturated solution is 1500Kg, and the mother liquor can be recycled. Among them, the liquid caustic soda is transported into the reaction kettle through the elevated tank. The obtained original powder of quinclorac sodium salt contains more than 85% of quinclorac sodium salt, and the drying loss is less than or equal to 1.0%.

[0024] The above-mentioned high-purity quinclorac sodium salt raw powder product is in the form of solid powder, which can be used as a...

Embodiment 2

[0026] Add 500Kg of quinclorac original drug with a purity of 85% into a 3000L enamel reaction kettle containing 1500Kg of water, stir, add a potassium hydroxide solution with a purity of 50%, the addition amount is 216Kg, carry out a salt-forming reaction, and then use a 2000L pump Filter cylinder is filtered, then dry with airflow dryer, obtain quinclorac sodium salt wet product 710Kg after filtering, obtain the former medicine finished product 450Kg of quinclorac potassium salt after drying; Filtrate is quinclorac potassium The saturated solution of salt is 1500Kg, and the mother liquor can be recycled. The obtained quinclorac potassium salt former powder contains more than 85% of the quinclorac potassium salt, and the drying loss is less than or equal to 1.0%.

Embodiment 3

[0028] Add 500Kg of quinclorac original drug with a purity of 85% into a 3000L enamel reaction kettle with a water content of 1500Kg, stir, then add ammonia water with a purity of 25% in an amount of 140Kg, carry out a salt-forming reaction, and then use a 2000L suction tank to carry out Filter, then dry with airflow dryer, obtain quinclorac sodium salt wet product 585Kg after filtering, obtain the former medicine finished product 410Kg of quinclorac ammonium salt after drying; Filtrate is the saturation of quinclorac ammonium salt The solution is 1500Kg, and the mother liquor can be recycled. The obtained quinclorac ammonium salt raw powder contains more than 85% of the quinclorac ammonium salt, and the drying loss is less than or equal to 1.0%.

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Abstract

The related preparation method for Na or K or ammonia dichloroquinolinecarboxylate comprises: mixing the dichloroquinoline acid and alkali to prepare salt; filtering, drying, and obtaining the product with 20-70% salt, 1-20% auxiliary agent and 20-70% filler. This product has higher water solubility than dichloroquinoline acid benefit to plant absorption, hard to produce local drug harm during the application, and convenient to mix with other herbicide for larger weed spectrum.

Description

(1) Technical field [0001] The invention relates to a quinclorac acid salt and a preparation method thereof, and also relates to a solid preparation mainly prepared from quinclorac acid salt. (2) Background technology [0002] Quinclorac is a selective and efficient quinoline carboxylic acid barnyard weeding agent for paddy fields, with good safety and low toxicity for rice. Quinclorac is a hormone-type quinoline carboxylic acid herbicide. The symptoms of weed poisoning are similar to those of auxins. It is mainly used to control barnyard grass and has a long application period. It is effective in the 1-7 leaf stage. In addition to being mainly used for preventing barnyard grass in paddy fields, quinclorac can also control weeds such as Yujiuhua, tianjing, cress, bermudagrass, and saponins, or it can be used in combination with other herbicides to improve the weed killing spectrum. [0003] Since the quinclorac original drug has very little solubility in water, which is 0.0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D215/48A01N43/42A01P13/00
Inventor 王伟周曙光秦龙杨访城鲍敏申永陈丰收
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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