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公开(公告)号：US20230399351A1
公开(公告)日：2023-12-14
申请号：US18250728
申请日：2020-11-13
发明人： Zhenghua Li , Jiaxin Xia , Chuanjiu Xu , Guojia Xu
CPC分类号： C07H5/02 , B01D9/0031
摘要： Disclosed is a method for purifying sucralose, including: removing a solvent from a sucralose reaction solution to obtain a concentrated crude sucralose solution; under stirring, adding ethyl acetate into the concentrated crude sucralose solution, heating to a preset temperature, and holding at the preset temperature for a first preset time to obtain a crude product slurry with a certain amount of a sucralose crystal; and subjecting the crude product slurry to gradient cooling to an endpoint temperature, holding at the endpoint temperature for a second preset time, and filtering to obtain a sucralose crystal.
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公开(公告)号：US20230295074A1
公开(公告)日：2023-09-21
申请号：US18304403
申请日：2023-04-21
发明人： Jingang ZHAO , Jian Shi , Yongle Chen
IPC分类号： C07C231/24 , C07C51/43
CPC分类号： C07C231/24 , C07C51/43
摘要： The invention provides a DMF recycling method, the method comprises: neutralization step, extraction and crystallization step, layering step, evaporation step; a condensate obtained by evaporation of the upper layer liquid phase is recycled into the anti-solvent, a concentrated solution obtained by evaporation of the upper layer liquid phase and a condensate obtained by evaporation of the lower layer liquid phase are mixed to obtain a crude DMF solution for recycling of DMF. The recycling method overcomes the problem that acetic acid in the stock solution corrodes the equipment and produces impurities, so as to improve the recycling purity and reduce the equipment cost.
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公开(公告)号：US20240083863A1
公开(公告)日：2024-03-14
申请号：US18519151
申请日：2023-11-27
发明人： Rui ZHOU , Zhen DING , Yongxu CHEN , Fengbao Yang , Gang LIU
IPC分类号： C07D291/06 , B01J21/04 , B01J23/04
CPC分类号： C07D291/06 , B01J21/04 , B01J23/04
摘要： Described herein is a method for preparing acesulfame potassium, comprising: pressing an acetoacetamide-N-sulfonic acid triethylamine salt solution and a cyclizing agent solution into a Venturireactor via different inlets, mixing same at a mixing section and a diffusion section of the Venturireactor, and then injecting the obtained mixture into a flow reactor, wherein the cyclizing agent solution is formed by dissolving sulfur trioxide in a first organic solvent; subjecting the mixture passing through the flow reactor to a sulfonation cyclization reaction under the action of a supported solid base heterogeneous catalyst preset in the flow reactor, and entering the obtained sulfonated cyclized product into a hydrolysis reactor; subjecting the sulfonated cyclized product and a hydrolysis agent preset in the hydrolysis reactor to a hydrolysis reaction to obtain a hydrolysis product solution; and adding potassium hydroxide into an organic phase of the hydrolysate solution for a salt-forming reaction to obtain the acesulfame potassium.
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公开(公告)号：US20230242564A1
公开(公告)日：2023-08-03
申请号：US18003350
申请日：2020-09-18
发明人： Jiaxin XIA , Weiqiang JIANG , Zhengsong ZHANG , Chaohui CHEN , Qingyang HU , Hao ZHANG , Yang WANG
摘要： Provided is a post-treatment method for a sucrose-6-carboxylate chlorination reaction solution, including: adding ammonia water or water to the sucrose-6-carboxylate chlorination reaction solution to obtain a mixture, and subjecting the mixture to preliminary neutralization reaction; introducing an ammonia gas into a resulting reaction solution at a predetermined temperature, adjusting a pH of the resulting reaction solution to a predetermined alkalinity range, and conducting a reaction at a reaction temperature for a period of time; and adjusting a pH of a reaction solution obtained after the ammonia gas neutralization using an acid to a predetermined acidity range.
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公开(公告)号：US20240109059A1
公开(公告)日：2024-04-04
申请号：US18518805
申请日：2023-11-24
发明人： Zhengsong ZHANG , Zhijian YANG , Chaohui CHEN , Dongdong SHEN
CPC分类号： B01J31/02 , C07H1/06 , C07H13/08 , B01J2231/70 , B01J2531/42
摘要： Described herein is a supported organotin catalyst and a preparation method for a sucrose-6-carboxylate. The supported organotin catalyst is prepared by coupling an organotin functional group to an inorganic carrier. The supported organotin catalyst of the present application can be used for catalyzing the generation of a sucrose-6-carboxylate, and after reaction, the supported organotin catalyst can be directly filtered and recovered only by adding a small amount of water to quench an acylating agent, so that the subsequent dehydration process is simpler and easier, and the supported organotin catalyst is thus very economical in terms of manpower, equipment and energy.
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公开(公告)号：US20230399352A1
公开(公告)日：2023-12-14
申请号：US18002467
申请日：2021-02-07
发明人： Zhengsong ZHANG , Zhenghua LI , Jingang ZHAO , Congyong ZHANG , Xuelian ZHENG , Yongfeng BU
摘要： A production apparatus and a production method of sucrose-6-ester are provided. The production apparatus includes a tank, a rotary distillation device, and a condensation device, the tank includes a separation chamber and a reaction chamber; the condensation device is sheathed inside the rotary distillation device, and the rotary distillation device is slidably connected in the separation chamber; a turntable of the rotary distillation device is fixed on a top surface of a drum, and a first heating device is provided on an outer wall of the turntable; the condensation device includes a condenser pipe, a water receiving plate, and a condensate water box that are connected sequentially from top to bottom; the condensation device is sheathed inside the drum of the rotary distillation device in a non-contact manner, and the condenser pipe is arranged to penetrate through the turntable and contacts a top surface of the tank.
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7.发明公开公开(公告)号：US20230312445A1
公开(公告)日：2023-10-05
申请号：US18207734
申请日：2023-06-09
发明人： Yuean CHEN , Jian ZHAN , Qijun ZHANG
CPC分类号： C07C29/84 , B01J19/24 , B01J4/001 , B01D3/40 , B01D3/143 , B01D3/009 , B01D5/0063 , B01D3/322 , B01J2204/005
摘要： Disclosed is a device for distillation decolorization and purification of alcohol in maltol production. The device comprises a rectification column, an alkali hydrolysis kettle and an alkali hydrolysis rectification column. An upper outlet of the rectification column is connected to an inlet of the alkali hydrolysis kettle, an outlet of the alkali hydrolysis kettle is connected to an inlet of the alkali hydrolysis rectification column, and an upper outlet of the alkali hydrolysis rectification column is connected to an inlet of a finished product tank. Further disclosed is a method for distillation decolorization and purification of alcohol in maltol production. A product processed by the solution of the present application has a high purity.
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公开(公告)号：US20240327445A1
公开(公告)日：2024-10-03
申请号：US18250957
申请日：2020-11-27
发明人： Chuanjiu Xu , Chenggang Xu , Yongle Chen
摘要： Provided is a method for purifying sucralose-6-acetate, including: preparation: providing a saturated solution of crude sucralose-6-acetate in ethyl acetate that is heated to a predetermined temperature; gradient crystallization: subjecting the saturated solution to multiple cooling crystallization and filtration, and collecting crude sucralose-6-acetate obtained after the multiple cooling crystallization and filtration, where during each cooling crystallization process, a low-polarity solvent is added dropwise to the saturated solution to reduce a polarity of the saturated solution during crystallization step by step; and purification: subjecting a collected crude sucralose-6-acetate to recrystallization for purification by using a mixed solution of ethyl acetate and the low-polarity solvent to obtain fine sucralose-6-acetate of high purity.
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公开(公告)号：US20230415126A1
公开(公告)日：2023-12-28
申请号：US18036623
申请日：2021-03-24
发明人： Zhengsong Zhang , Zhijian Yang , Jingang Zhao , Zhenghua Li , Chaohui Chen
IPC分类号： B01J23/14 , C07D407/12 , B01J31/12
CPC分类号： B01J23/14 , C07D407/12 , B01J31/124 , B01J2231/49 , B01J2531/42
摘要： Provided are a supported catalyst and a method for synthesizing a sucrose-6-ester. The supported catalyst includes an active functional component and an inorganic carrier, wherein the active functional component is a compound shown in formula (1), wherein n is a natural number greater than or equal to 2; R is an atom linked to a surface of the inorganic carrier; and one or two of R1, R2, and R3 is/are hydrocarbyl, and the rest are independently any one selected from the group consisting of oxygen, hydroxyl, hydrocarbyloxy, and acetoxy.
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公开(公告)号：US20230382877A1
公开(公告)日：2023-11-30
申请号：US18027345
申请日：2020-09-21
发明人： Congchun Wang , Yongxu Chen , Rui Zhou , Dongdong Shen , Zhengsong Zhang
IPC分类号： C07D291/06
CPC分类号： C07D291/06 , C07B2200/13
摘要： Provided is a method for refining acesulfame potassium (Ace K), including: adding hydrogen peroxide and activated carbon to an Ace K crude product-containing solution to obtain a mixture, maintaining the mixture at a first preset temperature for a first preset time, and filtering the mixture to obtain an Ace K mother liquor; conducting concentration on the Ace K mother liquor to a preset concentration to obtain a concentrated solution, allowing the concentrated solution to stand at a second preset temperature for a second preset time to form an Ace K crystal nucleus, and obtaining a crystal nucleus-containing solution; conducting programmed freezing on the crystal nucleus-containing solution to obtain a solution with a large number of Ace K crystals; and conducting centrifugation, water washing, and drying on the solution with a large number of Ace K crystals to obtain an Ace K crystal product.
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