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Preparation method of glyphosate zinc

A glyphosate zinc and glyphosate technology, applied in the field of fungicide preparation, can solve the problems of complex preparation process, low yield, and many by-products, and achieve the effects of low content, high yield, and simple reaction

Inactive Publication Date: 2015-06-17
SHANDONG WEIFANG RAINBOW CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the synthetic methods of glyphosate zinc in the prior art first generate glyphosate sodium salt, and then generate glyphosate zinc with zinc salt solution, so not only the glyphosate content is high in the mother liquor, the preparation process is complicated, and the yield Low, many by-products, high cost

Method used

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  • Preparation method of glyphosate zinc
  • Preparation method of glyphosate zinc
  • Preparation method of glyphosate zinc

Examples

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preparation example Construction

[0020] The invention provides a kind of preparation method of zinc glyphosate, comprising:

[0021] Glyphosate and zinc-containing compounds are heated and reacted in a solution to obtain zinc glyphosate;

[0022] The zinc-containing compound is selected from one or more of zinc oxide, zinc carbonate, zinc hydroxide and basic zinc carbonate.

[0023] In the invention, glyphosate and zinc-containing compounds are heated and reacted in a solution to obtain zinc glyphosate. The zinc-containing compound is selected from one or more of zinc oxide, zinc carbonate, zinc hydroxide and basic zinc carbonate; preferably, the zinc-containing compound is selected from zinc oxide, zinc carbonate, zinc hydroxide and alkali A type of zinc carbonate. The present invention does not limit the source and purity of the glyphosate, it can be commercially available, preferably glyphosate with a purity of more than 95%; the present invention is for the above-mentioned zinc oxide, zinc carbonate, zi...

Embodiment 1

[0070] Put 250ml of water and 14.5g of 99% zinc oxide into a 500ml glass reactor, stir for 10 minutes, heat to 60°C, add 21g of 97.5% glyphosate dry product, continue heating to 95°C, measure pH = 3.5, heat preservation reaction 1 Hours, cooled to 25 ° C, stirred for 12 hours, a large number of white crystal grains crystallized, filtered with suction to obtain 40.5 g of white wet product solid, the filtrate was the mother liquor, which can be used mechanically when feeding next time. The white wet product solid was dried to obtain 30.82 g of white dry product solid.

[0071] Take 0.1g of the sample and place it in a test tube, add 20ml of water, heat to dissolve, let it cool, add 4 to 6 drops of potassium ferrocyanide test solution dropwise, a white precipitate is formed, separate, the white precipitate is insoluble in hydrochloric acid, thus proving the exist.

[0072] Glyphosate is measured in the mother liquor according to the assay method of the present invention, and the...

Embodiment 2

[0074] Put 100ml of water, 150ml of zinc glyphosate mother liquor, and 28g of 99% zinc oxide into a 500ml glass reactor, stir for 10 minutes, heat to 60°C, add 40g of 97% glyphosate dry product, continue heating to 95°C, and measure the pH =3.5, heat preservation reaction for 1 hour, lower the temperature to 20°C, stir for 12 hours, a large amount of white crystal grains crystallize, and suction filter to obtain 76.6g of white wet product solid, the filtrate is the mother liquor, which can be used mechanically when feeding next time. The white wet product solid was dried to obtain 59.39 g of white dry product solid. According to the assay method of the present invention, glyphosate in the mother liquor is measured, the result shows that the mother liquor contains 0.58% glyphosate, and the glyphosate zinc in the solid is assayed according to the assay method of the present invention, the result shows that white The glyphosate content in the dry product solid is 62.76%, the puri...

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Abstract

The invention provides a preparation method of glyphosate zinc, which comprises the following step: heating glyphosate and a zinciferous compound in a solution to react to obtain the glyphosate zinc, wherein the zinciferous compound is selected from one or more of zinc oxide, zinc carbonate, zinc hydroxide and basic zinc carbonate. The glyphosate and zinciferous compound directly react to obtain the glyphosate zinc instead of reaction after previously generating sodium salt; and thus, the method is simpler in reaction, does not need to treat abundant sodium-containing wastewater, and is more environment-friendly. The glyphosate content in the prepared mother solution is low, and the glyphosate zinc yield is high.

Description

technical field [0001] The invention relates to the field of preparation of fungicides, in particular to a preparation method of zinc glyphosate. Background technique [0002] Glyphosate, English name Glyphosate, also known as: Zhen Cao Ning, Roundup (Roundup), glyphosate, phosphonic acid, N-(phosphonomethyl) glycine, the pure product is a non-volatile white solid, molecular formula C 3 h 8 NO 5 P, molecular weight 169.08, insoluble in organic solvents, solubility in water is 1.2% (at 25 degrees Celsius). Low toxicity to humans and animals. The acute oral LD50 of rats is 4320 mg / kg, and the percutaneous LD50 of rabbits is >7940 mg / kg. Low toxicity to fish. In the case of human ingestion, glyphosate may cause vomiting and throat pain within 15 minutes after oral administration, followed by abdominal pain and diarrhea. Symptoms are usually more apparent when the dose exceeds 100ml. Glyphosate is a post-emergence systemic non-selective high-efficiency broad-spectrum h...

Claims

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Application Information

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IPC IPC(8): C07F9/38
Inventor 孙国庆张卫民宋吉奎侯永生
Owner SHANDONG WEIFANG RAINBOW CHEM
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