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    Cyclic process for producing taurine from monoethanolamine
    1.
    发明授权
    Cyclic process for producing taurine from monoethanolamine 有权

    公开(公告)号：US11254639B1

    公开(公告)日：2022-02-22

    申请号：US17015932

    申请日：2020-09-09

    申请人： Vitaworks IP, LLC

    发明人： Songzhou Hu

    IPC分类号： C07C303/44 ,  C07C303/02 ,  C07C303/24 ,  C07C213/08 ,  C01C1/247 ,  C01C1/246

    摘要： There is disclosed a cyclic process for producing taurine from monoethanolamine comprising the steps of: (a) recovering monoethanolamine sulfate from an aqueous mother liquor solution; (b) reacting the monoethanolamine sulfate with sulfuric acid to form an aqueous solution comprised of monoethanolamine bisulfate; (c) heating the aqueous solution comprised of the monoethanolamine sulfate and optionally added monoethanolamine sulfate to yield 2-aminoethyl hydrogen sulfate ester; (d) reacting the ester with ammonium sulfite or an alkali sulfite to yield taurine and ammonium or alkali sulfate; (e) separating taurine and ammonium or alkali sulfate to give an aqueous mother liquor solution; and (f) recovering the monoethanolamine sulfate from the aqueous mother liquor solution and recycling to the monoethanolamine sulfate to step (b).

    Process for producing long chain amino acids and dibasic acids
    2.
    发明授权
    Process for producing long chain amino acids and dibasic acids 有权

    公开(公告)号：US10343978B2

    公开(公告)日：2019-07-09

    申请号：US15880293

    申请日：2018-01-25

    申请人： Vitaworks IP, LLC

    发明人： Songzhou Hu

    IPC分类号： C07C227/00 ,  C07C227/08 ,  C07C229/08 ,  C07C51/47 ,  C07C227/40 ,  C07C209/62 ,  C07C227/20

    摘要： There is disclosed a process for the production of long chain amino acid and long chain dibasic acid, comprising: (1) reacting long chain keto fatty acid with hydroxylamine or subjecting keto fatty acid to an ammoximation reaction to yield an oxime fatty acid; (2) reacting the oxime fatty acid with an alcohol or a primary amine or a secondary amine to prepare an ester or amide; (3) subjecting the oxime fatty acid ester or amide to the Beckmann rearrangement to yield a mixture of two amide fatty acids; (4) hydrolyzing the mixed amide fatty acids to produce long chain amino acid, long chain dibasic acid, short chain alkylamine, and alkanoic acid.

    Process for the separation of long chain amino acids and dibasic acids
    3.
    发明授权
    Process for the separation of long chain amino acids and dibasic acids 有权

    公开(公告)号：US10329240B2

    公开(公告)日：2019-06-25

    申请号：US15644665

    申请日：2017-07-07

    申请人： VITAWORKS IP, LLC

    发明人： Songzhou Hu

    IPC分类号： C07C227/42 ,  C07C227/40 ,  C07C51/44 ,  C07C51/43 ,  C07C209/86 ,  B01D3/36 ,  B01D9/00 ,  B01D11/04 ,  C07C51/46 ,  C07C51/47 ,  C07C51/48 ,  B01D21/26

    摘要： There is disclosed a process for the separation of long chain amino acid and long chain dibasic acid, comprising: (1) recovering alkylamine from an aqueous solution of an alkali hydroxide hydrolysis of the mixed amide derivatives by distilling or by extracting with an extractant solvent; (2) cooling the aqueous solution of step (1) to precipitate a mixed alkali salts of long chain amino acid and dibasic acid; (3) recovering the mixed alkali salts of long chain amino acid and dibasic acid to provide a mother liquor; (4) separating long chain amino acid and dibasic acid by acidification-extraction of long chain dibasic acid with an extractant solvent or by selective dissolution of alkali salt of long chain amino acid in an aqueous solvent; and (4) adding an acid to the mother liquor of step (3) to obtain alkanoic acid.

    Process for purifying long chain amino acids
    4.
    发明授权
    Process for purifying long chain amino acids 有权

    公开(公告)号：US10239823B2

    公开(公告)日：2019-03-26

    申请号：US15686500

    申请日：2017-08-25

    申请人： VITAWORKS IP, LLC

    发明人： Songzhou Hu ,  William S. Hu

    IPC分类号： C07C227/40 ,  C07C227/42

    摘要： There is disclosed a process for the purification of long chain amino acids by recrystallization in an aqueous solution of organic carboxylic acid in the absence or presence of solvent, comprising: (1) dissolving a long chain amino acid in an aqueous solution of organic carboxylic acid by heating; (2) cooling the solution of step (1) to crystallize the long chain amino acid; and (3) recovering the long chain amino acid of step (2) by means of solid-liquid separation.

    Cyclic process for producing taurine
    7.
    发明授权
    Cyclic process for producing taurine 有权

    公开(公告)号：US09745258B1

    公开(公告)日：2017-08-29

    申请号：US15268071

    申请日：2016-09-16

    申请人： VITAWORKS IP, LLC

    发明人： Songzhou Hu

    IPC分类号： C07C303/02 ,  C07C303/32 ,  C07C303/44

    CPC分类号： C07C303/02 ,  C07C303/22 ,  C07C303/32 ,  C07C303/44 ,  C07C309/14 ,  C07C309/08

    摘要： There is disclosed a process for producing taurine from ammonium isethionate by the ammonolysis of alkali isethionate in the presence of alkali ditaurinate or alkali tritaurinate, or their mixture, to inhibit the formation of byproducts and to continuously convert the byproducts of the ammonolysis reaction to alkali taurinate. Alkali taurinate is reacted with ammonium isethionate to obtain taurine and to regenerate alkali isethionate. The production yield is increased to from 90% to nearly quantitative. The ammonolysis reaction is catalyzed by alkali salts of hydroxide, sulfate, sulfite, phosphate, or carbonate.

    Cyclic process for producing taurine
    8.
    发明授权
    Cyclic process for producing taurine 有权
    生产牛磺酸的循环过程

    公开(公告)号：US09593076B2

    公开(公告)日：2017-03-14

    申请号：US15238621

    申请日：2016-08-16

    申请人： VITAWORKS IP, LLC

    发明人： Songzhou Hu

    IPC分类号： C07C303/02

    CPC分类号： C07C303/02 ,  C07C303/32 ,  C07C303/44 ,  C07C309/14

    摘要： There is disclosed a process for producing taurine by the ammonolysis of alkali isethionate in the presence of alkali ditaurinate or alkali tritaurinate, or their mixture, to inhibit the formation of byproducts and to continuously convert the byproducts of the ammonolysis reaction to alkali taurinate. Alkali taurinate is neutralized with isethionic acid to obtain taurine and to regenerate alkali isethionate. The production yield is increased to from 90% to nearly quantitative. The ammonolysis reaction is catalyzed by alkali salts of hydroxide, sulfate, sulfite, phosphate, or carbonate.

    摘要翻译： 公开了通过碱金属羟乙基磺酸盐在二磺酸三钠或三氯三酸二钠或其混合物的存在下的氨解生产牛磺酸的方法，以抑制副产物的形成，并将氨解反应的副产物连续转化成碱金牛磺酸盐。 碱性牛磺酸钠用羟乙磺酸中和，得到牛磺酸，再生碱羟乙基磺酸盐。 生产产量从90％提高到接近数量。 氨解反应由氢氧化物，硫酸盐，亚硫酸盐，磷酸盐或碳酸盐的碱金属盐催化。

    PROCESS FOR PRODUCING TAURINE
    9.
    发明公开
    PROCESS FOR PRODUCING TAURINE 审中-公开

    公开(公告)号：US20240092732A1

    公开(公告)日：2024-03-21

    申请号：US18213384

    申请日：2023-06-23

    申请人： Vitaworks IP, LLC

    发明人： Songzhou Hu

    IPC分类号： C07C303/32

    CPC分类号： C07C303/32

    摘要： The present invention is directed to an improved process for producing taurine from ammonium isethionate without generating or using any acid within the cyclic process as recited in the claims appended hereto.