Provided in the present disclosure is a mixture, comprising 86-89 wt % of a methionine hydroxy analog and an oligomer thereof, more than 99.95 wt % being a monomer, dimer and trimer, and the ratio of monomer:dimer:trimer by weight being 77-80:18.5-19.5:3-4; 9.2-13.5 wt % of water; and less than 0.5 wt % of ammonium sulfate and ammonium bisulfate. The viscosity of the mixture at 10° C. is lower than 200 mPa·s. Further provided is a method for processing a mixture containing a methionine hydroxy analog and an oligomer thereof.
A method for treating acrolein reactor wastewater, comprising the steps of: S1. mixing acrolein reactor wastewater and a carbonate aqueous solution to obtain a mixed solution, wherein the acrolein reactor wastewater has a pH value of less than 2 and contains 500 ppm to 3,000 ppm of acrolein, 50 ppm to 800 ppm of allyl alcohol, 40,000 ppm to 100,000 ppm of acrylic acid, 10,000 ppm to 30,000 ppm of formaldehyde, 3,000 ppm to 10,000 ppm of acetic acid and 3,000 ppm to 8,000 ppm of maleic acid; and the mixed solution has a pH value of 4 to 6, a COD concentration ranging from 7,500 ppm to 30,000 ppm, and a formaldehyde concentration ranging from 800 ppm to 4,000 ppm; S2. conveying the mixed solution obtained in step S1 to an anaerobic reactor (4) for biochemical treatment; and S3. conveying the solution treated in step S2 to an aerobic biochemical tank (5) for treatment; and reflowing at least one part of the solution treated in step S2 and/or S3 to step S2. Also provided is a device for treating acrolein reactor wastewater.
C02F 103/36 - Nature of the water, waste water, sewage or sludge to be treated from the chemical industry not provided for in groups from the manufacture of organic compounds
C02F 11/127 - Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
3.
MIXTURE CONTAINING METHIONINE HYDROXY ANALOG AND OLIGOMER THEREOF, AND PREPARATION METHOD THEREFOR
Provided in the present disclosure is a mixture, comprising: 86-89 wt% of a methionine hydroxy analog and an oligomer thereof, more than 99.95 wt% being a monomer, dimer and trimer, and the ratio of monomer:dimer:trimer by weight being 77-80:18.5-19.5:3-4; 9.2-13.5 wt% of water; and less than 0.5 wt% of ammonium sulfate and ammonium bisulfate. The viscosity of the mixture at 10°C is lower than 200 mPa.s. Further provided is a method for processing a mixture containing a methionine hydroxy analog and an oligomer thereof.
C07C 323/52 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
4.
MIXTURE CONTAINING METHIONINE HYDROXY ANALOG AND OLIGOMER THEREOF, AND PREPARATION METHOD THEREFOR
Provided in the present disclosure is a mixture, comprising: 86-89 wt% of a methionine hydroxy analog and an oligomer thereof, more than 99.95 wt% being a monomer, dimer and trimer, and the ratio of monomer:dimer:trimer by weight being 77-80:18.5-19.5:3-4; 9.2-13.5 wt% of water; and less than 0.5 wt% of ammonium sulfate and ammonium bisulfate. The viscosity of the mixture at 10°C is lower than 200 mPa.s. Further provided is a method for processing a mixture containing a methionine hydroxy analog and an oligomer thereof.
C07C 323/52 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
5.
METHOD AND DEVICE FOR TREATING ACROLEIN REACTOR WASTEWATER
A method for treating acrolein reactor wastewater, comprising the following steps: S1. mixing the acrolein reactor wastewater and a carbonate aqueous solution to obtain a mixed solution, wherein the pH value of the acrolein reactor wastewater is smaller than 2, and the mixed solution contains 500-3,000 ppm of acrolein, 50-800 ppm of allyl alcohol, 40,000 to 100,000 ppm of acrylic acid, 10,000-30,000 ppm of formaldehyde, 3,000-10,000 ppm of acetic acid, and 3,000-8,000 ppm of maleic acid; the pH value of the mixed solution is 4 to 6, the COD concentration is 7,500 ppm to 30,000 ppm, and the formaldehyde concentration is 800 ppm to 4,000 ppm; S2. conveying the mixed solution obtained in step S1 to an anaerobic reactor (4) for biochemical treatment; and S3. conveying the solution treated in step S2 to an aerobiotic biochemical tank (5) for treatment; and enabling at least one part of the solution treated in step S2 and/or step S3 to reflow to step S2. Also provided is a device for treating acrolein reactor wastewater.
C02F 9/14 - Multistep treatment of water, waste water or sewage at least one step being a biological treatment
C02F 103/36 - Nature of the water, waste water, sewage or sludge to be treated from the chemical industry not provided for in groups from the manufacture of organic compounds
The present invention provides a process for purifying methionine. A methionine product having a purity of up to 99% or higher is obtained by separating methionine from a salt by-product through a process comprising adsorption and desorption using a macroporous adsorption resin, where the methionine content in the salt by-product is ≤0.03%. The yield of methionine extracted with the resin is up to 98% or higher. By using the process of the present invention, the existing production process is simplified, the quality of the methionine product is improved, and the production costs for methionine are reduced.
C07C 323/58 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups with amino groups bound to the carbon skeleton
A61K 31/145 - Amines, e.g. amantadine having sulfur atoms, e.g. thiurams (N—C(S)—S—C(S)—N or N—C(S)—S—S—C(S)—N); Sulfinylamines (—N=SO); Sulfonylamines (—N=SO2)
The present invention provides a process for purifying methionine. A methionine product having a purity of up to 99% or higher is obtained by separating methionine from a salt by-product through a process comprising adsorption and desorption using a macroporous adsorption resin, where the methionine content in the salt by-product is ≤0.03%. The yield of methionine extracted with the resin is up to 98% or higher. By using the process of the present invention, the existing production process is simplified, the quality of the methionine product is improved, and the production costs for methionine are reduced.
C07C 323/58 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups with amino groups bound to the carbon skeleton
B01D 15/12 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the preparation of the feed
B01D 15/42 - Selective adsorption, e.g. chromatography characterised by the development mode, e.g. by displacement or by elution
The present invention provides a process of purifying methionine. The process uses a macroporous adsorption resin to separate methionine and a byproduct salt, and can obtain a methionine product having a purity ≥ 99％ via adsorption and desorption processes. The byproduct salt has a methionine content ≤ 0.03％. The yield of extracting methionine with the resin is ≥ 98％. The method of the present invention can be used to simplify the existing manufacturing processes, increase the quality of a methionine product and reduces the manufacturing cost of methionine.
C07C 323/58 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups with amino groups bound to the carbon skeleton
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