5994-61-6Relevant articles and documents
Recycling method for mother liquor of N-(phosphonomethyl)iminodiacetic acid
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Paragraph 0034; 0035, (2017/01/19)
The invention relates to a recycling method for mother liquor of N-(phosphonomethyl)iminodiacetic acid. According to the invention, with iminodiacetonitrile as a main raw material, through an alkaline hydrolysis process or an acidolysis and alkaline hydrolysis combined process, ammonia gas is recycled or/and monosodium diacid salt is generated by addition of ammonium salt and double decomposition reaction of deamination under heating; a qualified sodium chloride by-product is precipitated and separated through direct hydrolysis of the mother liquor of N-(phosphonomethyl)iminodiacetic acid and common-ion effect of hydrogen chloride; acidic mother liquor can be recycled; the mother liquor, the mother liquor incapable of being reused and washing water can be completely precipitated and separated through the addition of calcium hydroxide; the obtained precipitate can regenerate raw materials and products through an aqueous solution of acid or alkali; N-(phosphonomethyl)iminodiacetic acid is reused or separately synthesized; and the regenerated calcium hydroxide can be repeatedly reused. The novel recycling method provided by the invention can realize clean production of N-(phosphonomethyl)iminodiacetic acid and cyclic utilization of by-products with high added value.
Using glycine crystallization mother liquor to produce N-phosphonomethyl glycine method (by machine translation)
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Paragraph 0045; 0053; 0061; 0069, (2017/01/31)
The invention belongs to the technical field of agricultural chemicals, relates to a use of glycine crystallization mother liquor to produce N-phosphonomethyl-glycine is method for treating keratoconjunctival, the method is the mother liquor through the chemical reaction of glycine in completely converted into salt of iminodiacetic acid-containing mother liquor, and then the iminodiacetic acid salt mother liquor and chlorine methyl phosphine acid sodium salt reaction, to obtain N-phosphonomethyl iminodiacetic acid, obtained after the oxidation N-phosphonomethyl glycine. The method is well solved the difficult problem of glycine crystallization mother liquor treatment, the better use of the mother liquor in the glycine residue and its by-product iminodiacetic acid production N-phosphonomethyl glycine, three waste resource, create social benefits and economic benefits; intermediate product generated by this method without the need of separation and purification, does not need to remove inorganic salt, the reaction procedures simplified, the cost saving is even more; in addition the method of the present invention, the whole reaction process is not a large amount of waste liquid produced, also produced of non-formaldehyde, is friendly to the environment. (by machine translation)
Glyphosate alkaline mother liquor processing method
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Paragraph 0028-0029, (2017/01/17)
The invention discloses a treatment method of a glyphosate alkaline mother solution, which comprises the following steps that: a hydrochloric acid is added to the mother solution to adjust the pH of the solution to 1-5 to obtain a solution A; the solution A is subjected to membrane separation to obtain a solution B and a sodium chloride solution, and the sodium chloride solution is evaporated to obtain a saturated solution; and the saturated sodium chloride solution is subjected to the Hou soda process to obtain sodium carbonate to be recycled. The treatment method is characterized in that the solution B is concentrated to make the concentration of a solute in the solution B increase to 3-10 times, i.e. a solution C, and then the appropriate amount of glycine and formaldehyde is added to the solution C, so that glyphosate and phosphorous acid in the solution C are reacted completely to obtain glyphosine and the original glyphosine in the solution C; and the glyphosine is neutralized, leached and dried and the like to obtain a glyphosine solid to be recycled. The treatment method has the advantages that the glyphosate, the glyphosine, sodium hypophosphite and the sodium chloride in the glyphosate alkaline mother solution are fully recycled, the waste is reduced, the pollution is reduced, and the utilization rate of the alkaline mother solution is improved.