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Glyphosate production method

A production method, glyphosate technology, applied in the field of glyphosate preparation, can solve the problems of high price, large usage, large amount of waste water, etc., and achieve the effects of low cost, easy operation and high yield

Active Publication Date: 2017-03-29
SHANDONG RUNBO BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented technology involves producing two chemical compounds called mimodal or bisiminocyanato-4-(NCS). These are made up through combining certain substances together with formaldezain and gliceranone in specific ways. By adding these different types of molecules together, we create new products that have better properties than each other alone.

Problems solved by technology

Techn problem addressed in this patented text relates to finding an effective way to treat various types of grassy vegetations without harmful side effects such as those caused by traditional methods like chemical pesticides.

Method used

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  • Glyphosate production method

Examples

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Effect test

Embodiment 1

[0051] Add 12g of 98% paraformaldehyde to a 500ml four-necked bottle, add 20g of water and 40g of 30% hydrochloric acid, heat to dissolve, raise the temperature to 36°C, then add 15g of 98.5% glycine, stir until dissolved, and keep the reaction at 41°C for 1 hour.

[0052] Cool down to -10°C, slowly add 16.4g of 99% phosphorous acid, keep the reaction at 0°C for 1 hour, then raise the temperature to 50°C for 2 hours.

[0053] Under the negative pressure of -0.1MPa, the temperature was slowly raised to 80°C for 1.5 hours to deacidify under reduced pressure, and the hydrogen chloride in the reactant was removed as much as possible. The hydrogen chloride was absorbed by water, and the obtained hydrochloric acid could be reused.

[0054] After deacidification, add 60g of water to the four-necked bottle, stir to dissolve, add alkali to adjust the pH=2.0, add 2g of activated carbon and 0.2g of sodium tungstate, heat up to 68°C under constant stirring, and start to drop 30% under norm...

Embodiment 2

[0059] Add 65g of 37% formaldehyde solution, 65g of 30% hydrochloric acid, and 30g of 98.5% glycine into a 500ml four-necked bottle, heat up to 40°C, stir until dissolved, and keep it warm for 1 hour.

[0060] Cool down to -8°C, slowly add 32.8g of 99% phosphorous acid, keep the reaction at 2°C for 1 hour, then raise the temperature to 45°C for 2 hours.

[0061] Under the negative pressure of -0.1MPa, slowly raise the temperature to 60°C and deacidify under reduced pressure for 3 hours, try to remove hydrogen chloride in the reactant, hydrogen chloride is absorbed by water, and the obtained hydrochloric acid can be reused.

[0062] After deacidification, add 120g of water into a 1000ml high-pressure zirconium autoclave, stir to dissolve the above-mentioned distillation substrate, add alkali to adjust pH=2.0, add 4g of activated carbon, heat up to 68°C under constant stirring, and start adding 30% hydrogen peroxide dropwise under normal pressure 54g, the dropwise addition was c...

Embodiment 3

[0067] Add 65g of 37% formaldehyde solution, 62g of 30% hydrochloric acid, and 30g of 98.5% glycine into a 500ml four-neck bottle, heat up to 40°C, stir until dissolved, and keep it warm for 1 hour.

[0068] Cool down to -8°C, slowly add 32.6g of 99% phosphorous acid, keep the reaction at 10°C for 1 hour, then raise the temperature to 45°C for 2 hours.

[0069] Under the negative pressure of -0.1MPa, the temperature was slowly raised to 70°C for 2.5 hours to deacidify under reduced pressure, and the hydrogen chloride in the reactant was removed as much as possible. The hydrogen chloride was absorbed by water, and the obtained hydrochloric acid could be reused.

[0070] After deacidification, add 120g of water into a 1000ml high-pressure zirconium autoclave, stir to dissolve the above-mentioned distillation substrate, add alkali to adjust pH=2.0, add 4g of activated carbon, heat up to 55-70°C under constant stirring, and introduce oxygen-enriched air (oxygen Volume content 80%)...

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Abstract

The invention discloses a glyphosate production method. According to the glyphosate production method, formaldehyde, phosphorous acid, glycine, hydrochloric acid and an oxidizing agent are adopted as main raw materials; the formaldehyde and the glycine are subjected to a reaction in a hydrochloric acid aqueous solution to generate dihydroxymethyl glycine, the phosphorous acid is added to the hydrochloric acid aqueous solution of the dihydroxymethyl glycine to generate N-hydroxymethyl glyphosate, hydrogen chloride is removing through pressure reducing removing, the N-hydroxymethyl glyphosate is subjected to catalytic oxidation in an aqueous solution by using a catalyst and an oxidizing agent to obtain glyphosate and formic acid, the generated formic acid is further oxidized into carbon dioxide and water, and due to the low solubility of the glyphosate at the low temperature, the glyphosate is separated from the reaction system by using a cooling crystallization method and is re-crystallized to obtain the raw drug glyphosate. According to the present invention, the synthesis method has advantages of simple process, easy operation, no use of the triethylamine catalyst, low cost, high product yield and high product purity, and the obtained glyphosate can be used as the weeding agent in agriculture and forestry, and has good application prospect.

Description

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Claims

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Application Information

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Owner SHANDONG RUNBO BIOTECH CO LTD
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