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公开(公告)号：US20230183173A1
公开(公告)日：2023-06-15
申请号：US18109074
申请日：2023-02-13
发明人： Yong CHEN , Xiquan FANG , Shaobo LI , Feng LIU
IPC分类号： C07C303/22 , B01J39/18 , C07C303/44 , C07C303/32
CPC分类号： C07C303/22 , B01J39/18 , C07C303/44 , C07C303/32
摘要： A system for preparing high-purity taurine and salt. The system can be used in an ethylene oxide process for producing taurine. The system includes an addition reaction device, an ammonolysis reaction device, an evaporation device, and a taurine salt concentrated solution collection device. The ammonolysis reaction device is provided with a metal salt inlet, the taurine salt concentrated solution collection device is connected with an ion exchange system for ion exchange, the ion exchange system is provided with an acid inlet, an adsorption solution outlet and an eluate outlet, the adsorption solution outlet of the ion exchange system is connected with a taurine extraction device, the eluate outlet of the ion exchange system is connected with a salt extraction device, and the ion exchange system is provided with a purified water inlet, an adsorption unit cleaning water outlet and an elution unit cleaning water outlet.
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公开(公告)号：US20220281811A1
公开(公告)日：2022-09-08
申请号：US17402617
申请日：2021-08-16
发明人： Yong Chen , Xiquan Fang , Shaobo Li , Feng Liu
IPC分类号： C07C303/22 , C07C303/44
摘要： The present invention discloses a method for preparing taurine. According to the method, ethylene oxide reacts with hydrosulphite to generate isethionate, after the isethionate and ammonia are subjected to an ammonolysis reaction under a microwave condition, ammonia removal is conducted to obtain a taurine salt solution, the taurine salt solution is converted into a taurine solution through acidification or ion exchange or ion membrane or heating, and taurine is extracted through concentration and crystallization. According to the present invention, the reaction time can be shortened, and the reaction temperature and pressure can be reduced, thereby achieving high yield and reducing energy consumption.
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公开(公告)号：US11578037B2
公开(公告)日：2023-02-14
申请号：US17236691
申请日：2021-04-21
发明人： Yong Chen , Xiquan Fang , Shaobo Li , Feng Liu
IPC分类号： C07C303/22 , C07C303/44 , C07C303/32 , B01J39/18
摘要： A method for preparing high-purity taurine and salt by reacting ethylene oxide with bisulfite to generate isethionate, performing an ammonolysis reaction on the isethionate in combination with ammonia and a metal salt, evaporating the reaction solution and subjecting the concentrated solution to ion exchange to obtain an adsorption solution, extracting taurine from the adsorption solution, eluting adsorbed metal cations from the ion exchange system by an acid, and separately collecting the eluate containing a salt.
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公开(公告)号：US11459294B2
公开(公告)日：2022-10-04
申请号：US17008353
申请日：2020-08-31
发明人： Yong Chen , Xiquan Fang , Feng Liu , Shaobo Li
IPC分类号： C07C303/44 , C07C303/02 , B01D15/36 , C07C309/14
摘要： A method for removing impurities from a taurine mother liquor and recovering the taurine mother liquor. The method is used in an ethylene oxide production process for taurine. The last mother liquor of taurine is ion-exchanged through an anion exchange resin; then the anion exchange resin is eluted and regenerated with alkaline solution, and the eluate is collected. The eluate is subjected to ammonia mixing treatment, and the treated mother liquor is generated after the impunity is removed from the eluate by solid-liquid separation. The treated mother liquor can then be returned to the ammonolysis step of taurine production.
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公开(公告)号：US20210332008A1
公开(公告)日：2021-10-28
申请号：US17236691
申请日：2021-04-21
发明人： Yong CHEN , Xiquan FANG , Shaobo LI , Feng LIU
IPC分类号： C07C303/22 , C07C303/44 , B01J39/18
摘要： A method and system for preparing high-purity taurine and salt by reacting ethylene oxide with bisulfite to generate isethionate, performing an ammonolysis reaction on the isethionate and ammonia as well as a metal salt, evaporating the reaction solution to obtain a taurine salt concentrated solution, subjecting the concentrated solution to ion exchange in an ion exchange system to obtain an adsorption solution with a main ingredient of taurine, separately collecting the adsorption solution, extracting the taurine from the adsorption solution, eluting adsorbed metal cations from the ion exchange system by an acid, separately collecting the eluate, and extracting salt from the eluate or directly using the eluate as a salt solution product. According to the disclosure, advance separation of materials of two target products is completed after the ammonolysis reaction, and then the target products are separately extracted, so that an extraction process becomes very simple, interference brought to product separation when two target products are positioned in the same maternal system completely does not need to be considered, the process is simple, and the production cost is greatly reduced.
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公开(公告)号：US20210114978A1
公开(公告)日：2021-04-22
申请号：US16914224
申请日：2020-06-26
发明人： Yong CHEN , Xiquan FANG , Shaobo LI , Feng LIU , Xiaojun JIANG , Wei ZHOU
IPC分类号： C07C303/44 , C07C305/00 , C07C303/06
摘要： A method and a production system for recovering and treating taurine mother liquor, which is used for the process of ethylene oxide taurine production process. As for the treatment of the last mother liquor of taurine, add alkali firstly to the last mother liquor of taurine and then acid to form salt, or add salt directly; then concentrate and crystallize and filter, to remove lots of impurities in taurine mother liquor. This solves the problem of separating impurities, greatly shortening the time of removing impurities. The last mother liquor can also be decolorizes and additional impurities removes by activated carbon, and the removal of salt by mixing ammonia into the mother liquor to obtain the pure taurine mother liquor, thereby recovering the mother liquor and increasing the product yield.
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公开(公告)号：US20180208553A1
公开(公告)日：2018-07-26
申请号：US15315596
申请日：2016-07-01
发明人： Yong CHEN , Xiquan FANG , Shaobo LI , Xiaojun JIANG
IPC分类号： C07C303/44 , C07C303/22 , C07C303/32 , C07C309/14 , C07C309/08
CPC分类号： C07C303/44 , C07C303/22 , C07C303/32 , C07C309/08 , C07C309/14
摘要： The present application provides a process for preducing taurine, comprising the steps as follows: (a) mixing isethionic acid with taurine salt solution until the system pH reaches a certain value in a range from 5.0 to 9.5; (b) separating liquid phase and solid phase of the system; wherein said solid phase is the crude product of taurine, and said liquid phase is isethionate solution; (c) reacting ammonia solution with said liquid phase obtained from step (b) to obtain taurine salt solution. It uses isethionic acid to adjust the pH of the taurine salt solution, avoiding the problem causing by using sulphate acid to adjust the pH in the traditional process. By the recycling use of the cations in taurine salts, a new raw material or reagent does not need to be added which is benefit to reducing the use of dangerous chemical materials, simplifying the production process greatly, improving the utilization rate of raw materials, increasing the yield of the product and decreasing production cost significantly.
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公开(公告)号：US11858883B2
公开(公告)日：2024-01-02
申请号：US17693451
申请日：2022-03-14
发明人： Yong Chen , Xiquan Fang , Shaobo Li , Feng Liu
IPC分类号： C07C303/32 , C07C303/44 , C07C303/22
CPC分类号： C07C303/32 , C07C303/44 , C07C303/22 , C07C303/22 , C07C309/14 , C07C303/32 , C07C309/08
摘要： The present disclosure relates to a method for recycling a taurine mother liquor, which includes: adding a base to the taurine mother liquor, heating to a first temperature, carrying out a hydrolysis reaction, removing ammonia produced, and evaporating and concentrating the ammonia-removed solution to obtain an alkali metal hydroxyethyl sulfonate solution. When applying the method provided by the present disclosure for the recycling of the taurine mother liquor, the taurine mother liquor can be further converted into the alkali metal hydroxyethyl sulfonate solution, impurities are removed from the obtained alkali metal hydroxyethyl sulfonate solution, the impurity-removed alkali metal hydroxyethyl sulfonate solution is concentrated and crystallized, and the alkali metal hydroxyethyl sulfonate is separated out. The method provided by the present disclosure is an efficient and simple method for recycling the taurine mother liquor, which is very easy to implement industrially and can effectively recycle the taurine mother liquor.
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公开(公告)号：US20230416197A1
公开(公告)日：2023-12-28
申请号：US18146472
申请日：2022-12-27
发明人： Yong Chen , Xiquan Fang , Shaobo Li
IPC分类号： C07C303/14 , C07C303/44
CPC分类号： C07C303/14 , C07C303/44 , C07B2200/13
摘要： Disclosed is a high-efficiency cyclic preparation method for a columnar taurine finished product, including: preparing an aqueous taurine solution with a certain concentration; introducing the aqueous taurine solution into a basic resin for treatment to remove an alkali metal isethionate and an isethionic acid derivative; monitoring an effluent liquid at an outlet of the basic resin and collecting the effluent liquid that is monitored to be qualified; and crystallizing taurine of the collected effluent liquid to obtain a taurine crystal. The method of the present disclosure has the advantages of process innovation, and high efficiency, and the obtained taurine crystal has the advantages of good quality, good fluidity, no caking, low production cost and high efficiency, and has good prospects for industrial production.
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10.发明申请公开(公告)号：US20230044757A1
公开(公告)日：2023-02-09
申请号：US17958006
申请日：2022-09-30
发明人： Yong CHEN , Xiquan FANG , Feng LIU , Shaobo LI
IPC分类号： C07C303/44 , B01D15/36 , C07C303/02
摘要： A production system for removing impurities from a taurine mother liquor and recovering the taurine mother liquor. The system can be used in an ethylene oxide production process for taurine and the treatment of the last mother liquor of taurine. The system includes, consecutively, an anion resin adsorption device for adsorbing the anions of taurine and sodium isethionate, and an ammonia mixing and desalination device. A feed port of the anion resin adsorption device is operatively connected to receive the last mother liquor of taurine generated in the ethylene oxide taurine production process, and the anion resin adsorption device includes an anion exchange resin column. The ammonia mixing and desalination device includes an ammonia mixing reaction tank, a sealed filtering device, and a circulation path for returning filtrate to the ammonia mixing reaction tank.
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