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High-purity imidazolone weedicide ammonium salt raw powder and production process thereof

A technology of pure imidazolinones and imidazolinones, applied in the field of high-purity imidazolinone herbicide ammonium salt raw powder and its production process, can solve the problems of long production cycle and complicated production process, and achieve short production cycle , The production process is simple, the effect of high content

Active Publication Date: 2013-08-07
WEIFANG CYNDA CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main process of synthesizing the raw powder of ammonium salt of imidazolinone herbicides is the single-solvent method. The ammonium salt synthesized is in the form of vitreous body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] React 500kg (1.70kmol) of imazethapyr technical substance with a purity of 98%, 43.2kg (2.54kmol) of liquid ammonia, 1000kg of acetone, and 1000kg of cyclohexane in a 3000L enamel reactor. , cooling and filtering, and the solid is dried in a decompression oven to obtain high-purity imazethapyr ammonium salt former powder 482kg (1.56kmol). The obtained imazethapyr ammonium salt raw powder contains more than 98% of the imazethapyr ammonium salt, and the drying loss is less than or equal to 1.0%.

[0016] The high-purity imazethapyr ammonium salt raw powder product is a solid powder, which can be used as an excellent compound mother powder, mixed with solids, or mixed with liquids, without adverse physical phenomena such as precipitation, delamination, and turbidity. It is very easy to realize the industrialization of mixing. Can be widely used. The present invention not only can be used directly but also can be prepared, and is combined with mother powder and preparatio...

Embodiment 2

[0018] 500kg (1.88kmol) of the original drug of imazapyr with a purity of 98%, 166kg (2.82kmol) of isopropylamine, 1000kg of dichloromethane, and 1000kg of petroleum ether were reacted in a 3000L enamel reactor, and after the stirring reaction was transparent, distilled Chloromethane is cooled and filtered, and the solid is dried in a decompression oven to obtain high-purity imazapyr isopropylamine salt former powder 558kg (1.73kmol). The obtained imazapyr isopropylamine salt raw powder contains more than 98% of imazapyr isopropylamine salt, and the drying loss is less than or equal to 1.0%. .

Embodiment 3

[0020] 500kg (1.78kmol) of imazethapyr technical substance of purity 98%, 158kg (2.67kmol) isopropylamine, 1000kg methyl alcohol, 1000kg hexanaphthene are reacted in the enamel reactor of 3000L, after the stirring reaction is transparent, steam out Methanol is cooled and filtered, and the solid is dried in a decompression oven to obtain high-purity imazethapyr isopropylamine salt former powder 553kg (1.64kmol). The obtained imazethapyr isopropylamine salt raw powder contains more than 98% of imazethapyr isopropylamine salt, and the drying loss is less than or equal to 1.0%.

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PUM

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Abstract

The invention particularly discloses high-purity imidazolone weedicide ammonium salt raw powder and a production process thereof, which belong to the field of application of weedicides. The process comprises the following steps of: mixing an imidazolone weedicide active compound, amine (ammonia) and double solvents; completely salifying; evaporating a low-boiling-point solvent for pelletizing; filtering; and drying under the reduced pressure to obtain a product. By adopting the method, the product has the advantages of high content, good medicament effect, high mixing performance, short production period, simple production process, wide application range and broad market prospect.

Description

(1) Technical field [0001] The invention belongs to the application field of herbicides, in particular to a high-purity imidazolinone herbicide ammonium salt raw powder and a production process thereof. (2) Background technology [0002] Imidazolinone herbicides are absorbed through plant roots, stems and leaves, conduct in xylem and phloem, and accumulate in meristems. After the stems and leaves are treated, the sensitive weeds stop growing immediately, and after the soil treatment, the roots absorb the meristems that are conducted upwards to the tops of the weeds, causing them to stop growing and become necrotic. At present, imazethapyr is put into commercial production. Imazethapyrate, imidazaquin, imazethapyr, etc. The original medicine of imidazolinone herbicides has poor water solubility, and the general method to solve the problem is to form a salt. Now the commonly used dosage forms in the market are isopropylamine salt and ammonium salt. The practice of using it f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/50A01P13/00
Inventor 王现全姚刚李凯
Owner WEIFANG CYNDA CHEM