Patents by Inventor Bingbing Qin
Bingbing Qin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220371982Abstract: The present disclosure provides methods for isolating a long chain dicarboxylic acid such as a substantially pure or pure long chain dicarboxylic acid from a fermentation broth containing microbial cells.Type: ApplicationFiled: July 26, 2022Publication date: November 24, 2022Applicants: CATHAY BIOTECH INC., CIBT AMERICA INC.Inventors: Bingbing QIN, Yufeng YANG, Xiucai LIU
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Publication number: 20220306804Abstract: The present invention provides a process for producing a high temperature resistant polyamide, the high temperature resistant polyamide and the use thereof. The process comprises: optionally concentrating a polyamide salt solution, and then conducting the following operations: heating and pressurizing to a pressure of P1, and maintaining the pressure, wherein the temperature of the system is T1 at the end of the pressure-maintenance; depressurizing to a pressure of P2, wherein the temperature of the system is T2 at the end of the depressurization; and evacuating, whereby a polyamide melt is obtained; wherein P1 is 0.8-4 MPa, T1 is 250-290° C., T1<T2 and (T2?T1)/(P1?P2)=5-75. The process for producing a high temperature resistant polyamide according to the present invention is simple to operate and reduces energy consumption.Type: ApplicationFiled: December 31, 2021Publication date: September 29, 2022Inventors: Yuanbo ZHAO, Bingbing Qin, Xiucai Liu
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Patent number: 11427525Abstract: The present disclosure provides method for isolating a long chain dicarboxylic acid such as a substantially pure or pure long chain dicarboxylic acid from a fermentation broth containing microbial cells.Type: GrantFiled: September 30, 2020Date of Patent: August 30, 2022Assignees: CATHAY BIOTECH INC., CIBT AMERICA INC.Inventors: Bingbing Qin, Yufeng Yang, Xiucai Liu
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Patent number: 11319561Abstract: The present invention discloses a method for producing a long chain dicarboxylic acid by fermentation as well as a fermentation broth, a treated fermentation broth and a wastewater. The salt content in the fermentation broth is controlled to be below 20% by the fermentation method of the present invention. The method for producing a long chain dicarboxylic acid by fermentation provided by the present invention can effectively reduce the amount of alkali used in the fermentation process and the amount of acid used in the subsequent extraction of the long chain dicarboxylic acid, thereby reducing the amount of salt in the whole production process of the long chain dicarboxylic acid. At the same time, the method of the present invention also has many advantages such as shortening the fermentation time, increasing the acid production, reducing the amount of medium, and suitable for the production of various types of long-chain dicarboxylic acids, etc.Type: GrantFiled: December 3, 2018Date of Patent: May 3, 2022Assignees: CATHAY BIOTECH INC., CIBT AMERICA INC.Inventors: Min Xu, Chen Yang, Bingbing Qin, Naiqiang Li, Xiucai Liu
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Publication number: 20220080357Abstract: The present disclosure provides a system for refining long chain dicarboxylic acid, comprising: a first membrane filtration unit, for a first membrane filtration of a long chain dicarboxylic acid fermentation broth or a treated liquid therefrom; a first decolorization unit, for carrying out a first decolorization treatment to the filtrate obtained after the membrane filtration; a first acidification/crystallization unit, for carrying out a first acidification/crystallization of a filtrate obtained after the membrane filtration to give a solid-liquid mixture; a first separation unit, for a solid-liquid separation of the solid-liquid mixture; a drying unit, for drying the solid separated by the separation unit to give a first solid. By using the refining system according to the present disclosure, the purity of the obtained product is high, and the disadvantages such as poor quality of the product obtained by crystallization from a solvent and environment pollution caused by a solvent can be overcome.Type: ApplicationFiled: October 22, 2021Publication date: March 17, 2022Applicants: Cathay Biotech Inc., CIBT America Inc., Cathay (Jinxiang) Biomaterial Co., Ltd.Inventors: Chen Yang, Bingbing Qin, Yufeng Yang, Kai Wang, Xiucai Liu
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Patent number: 11155512Abstract: The present disclosure provides a method and a system for refining long chain dicarboxylic acid, said method comprising the following steps: (1) subjecting a long chain dicarboxylic acid fermentation broth or a treated liquid therefrom to a membrane filtration, an acidification/crystallization, a solid-liquid separation and drying to give a long chain dicarboxylic acid crude product; (2) subjecting the long chain dicarboxylic acid crude product to a vacuum distillation to give the long chain dicarboxylic acid product; wherein the pressure in the vacuum distillation is ?100 Pa. By using the refining method according to the present disclosure, the procedure is simplified, and the purity of the obtained product is high, and the disadvantages such as poor quality of the product obtained by crystallization from a solvent and environment pollution caused by a solvent can be overcome.Type: GrantFiled: May 29, 2020Date of Patent: October 26, 2021Assignees: Cathay Biotech Inc., CIBT America Inc., Cathay (Jinxiang) Biomaterial Co., Ltd.Inventors: Chen Yang, Bingbing Qin, Yufeng Yang, Kai Wang, Xiucai Liu
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Publication number: 20210188756Abstract: The present disclosure provides a method and a system for refining long chain dicarboxylic acid, said method comprising the following steps: (1) subjecting a long chain dicarboxylic acid fermentation broth or a treated liquid therefrom to a membrane filtration, an acidification/crystallization, a solid-liquid separation and drying to give a long chain dicarboxylic acid crude product; (2) subjecting the long chain dicarboxylic acid crude product to a vacuum distillation to give the long chain dicarboxylic acid product; wherein the pressure in the vacuum distillation is ?100 Pa. By using the refining method according to the present disclosure, the procedure is simplified, and the purity of the obtained product is high, and the disadvantages such as poor quality of the product obtained by crystallization from a solvent and environment pollution caused by a solvent can be overcome.Type: ApplicationFiled: May 29, 2020Publication date: June 24, 2021Inventors: Chen Yang, Bingbing Qin, Yufeng Yang, Kai Wang, Xiucai Liu
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Patent number: 11008279Abstract: Provided is a method for purifying 1,5-pentanediamine comprising: providing 1,5-pentanediamine to be purified and treating the 1,5-pentanediamine to be purified by a reduction reaction to obtain purified 1,5-pentanediamine. Meanwhile, further provided is 1,5-pentanediamine prepared by the method. The purification method has a concise process and a simple operation, and is suitable for industrial production, and can significantly improve the quality of 1,5-pentanediamine.Type: GrantFiled: December 5, 2019Date of Patent: May 18, 2021Assignees: CATHAY BIOTECH INC., CIBT AMERICA INC.Inventors: Bingbing Qin, Charlie Liu, Shanshi Guo, Benliang Hou, Xiucai Liu
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Publication number: 20210024446Abstract: The present disclosure provides method for isolating a long chain dicarboxylic acid such as a substantially pure or pure long chain dicarboxylic acid from a fermentation broth containing microbial cells.Type: ApplicationFiled: September 30, 2020Publication date: January 28, 2021Applicants: CATHAY BIOTECH INC., CIBT AMERICA, INC.Inventors: Bingbing QIN, Yufeng YANG, Xiucai LIU
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Patent number: 10807937Abstract: The present disclosure provides a method for isolating a long chain dicarboxylic acid from fermentation broth containing microbial cells. Also provided is a substantially pure long chain dicarboxylic acid isolated by the method.Type: GrantFiled: July 11, 2016Date of Patent: October 20, 2020Assignees: CATHAY BIOTECH INC., CIBT AMERICA INC.Inventors: Bingbing Qin, Yufeng Yang, Xiucai Liu
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Patent number: 10759737Abstract: Provided is a method for extracting a 1,5-pentanediamine from a solution system containing a 1,5-pentanediamine salt. The method comprises adding to the solution system an insoluble basic substance to form a solution system containing free 1,5-pentanediamine. The provided method has high applicability, is easy to use, and is environmentally-friendly, significantly lowering raw material costs and operating costs for the entire manufacturing process. The method achieves a high recovery rate for pentanediamine, and is more suitable for industrial-scale production.Type: GrantFiled: September 7, 2016Date of Patent: September 1, 2020Assignees: CATHAY BIOTECH INC., CIBT AMERICA INC.Inventors: Xiucai Liu, Bingbing Qin, Chen Yang
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Publication number: 20200109104Abstract: Provided is a method for purifying 1,5-pentanediamine comprising: providing 1,5-pentanediamine to be purified and treating the 1,5-pentanediamine to be purified by a reduction reaction to obtain purified 1,5-pentanediamine. Meanwhile, further provided is 1,5-pentanediamine prepared by the method. The purification method has a concise process and a simple operation, and is suitable for industrial production, and can significantly improve the quality of 1,5-pentanediamine.Type: ApplicationFiled: December 5, 2019Publication date: April 9, 2020Applicants: CIBTAmerica Inc., Cathay Biotech Inc.Inventors: Bingbing Qin, Charlie Liu, Shanshi Guo, Benliang Hou, Xiucai Liu
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Patent number: 10538481Abstract: Provided is a method for purifying 1,5-pentanediamine comprising: providing 1,5-pentanediamine to be purified and treating the 1,5-pentanediamine to be purified by a reduction reaction to obtain purified 1,5-pentanediamine. Meanwhile, further provided is 1,5-pentanediamine prepared by the method. The purification method has a concise process and a simple operation, and is suitable for industrial production, and can significantly improve the quality of 1,5-pentanediamine.Type: GrantFiled: December 17, 2014Date of Patent: January 21, 2020Assignees: Cathay Biotech Inc., CIBT America Inc.Inventors: Bingbing Qin, Charlie Liu, Shanshi Guo, Benliang Hou, Xiucai Liu
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Patent number: 10487176Abstract: The present invention provides a method for preparing nylon salt, which comprises mixing 1,5-pentanediamine, water and dicarboxylic acid at a temperature of 65 to 120° C. to obtain a nylon salt, wherein the amount of the water is 2% to 12% by weight based on the total weight of the 1,5-pentanediamine and the dicarboxylic acid. The present invention also provides a nylon salt. According to the present method for preparing nylon salt, the incomplete reaction between the 1,5-pentanediamine and the dicarboxylic acid, which is caused by the nylon salt present during the preparation in a solid state, can be avoided; the reaction between the 1,5-pentanediamine and the dicarboxylic acid can be significantly speeded up, and the reaction time is accordingly shorten. Consequently, the content of diamine and dicarboxylic acid remained in the resulting nylon salt is very low. In addition, the final nylon salt product, which present in a solid state, makes it easier to be stored and transported.Type: GrantFiled: December 17, 2014Date of Patent: November 26, 2019Assignees: Cathay Biotech Inc., CIBT America Inc.Inventors: Chen Yang, Bingbing Qin, Yi Zheng, Charlie Liu, Naiqiang Li, Xiucai Liu
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Patent number: 10464880Abstract: The present invention relates to a method for the purification of cadaverine from an aqueous cadaverine salt composition comprising one or more involatile impurities, the method comprising: (1) mixing the aqueous cadaverine salt composition with one or more bases to provide an aqueous cadaverine composition having a pH of at least about 12; (2) distilling or evaporating the aqueous cadaverine composition to produce an aqueous cadaverine solution, wherein one or more solvents are added to the evaporation/distillation system before the evaporation/distillation stops, and the one or more solvents comprise at least one or more high boiling point (HBP) solvents having a boiling point of at least 185° C. (1 atm); and (3) subjecting the aqueous cadaverine solution to one or more rectification steps to provide a cadaverine product.Type: GrantFiled: February 21, 2018Date of Patent: November 5, 2019Assignees: CATHAY BIOTECH INC., CIBT AMERICA INC.Inventors: Xiucai Liu, Charlie Liu, Bingbing Qin, Naiqiang Li, Yang Chen
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Publication number: 20190271012Abstract: The present invention discloses a method for producing a long chain dicarboxylic acid by fermentation as well as a fermentation broth, a treated fermentation broth and a wastewater. The salt content in the fermentation broth is controlled to be below 20% by the fermentation method of the present invention. The method for producing a long chain dicarboxylic acid by fermentation provided by the present invention can effectively reduce the amount of alkali used in the fermentation process and the amount of acid used in the subsequent extraction of the long chain dicarboxylic acid, thereby reducing the amount of salt in the whole production process of the long chain dicarboxylic acid. At the same time, the method of the present invention also has many advantages such as shortening the fermentation time, increasing the acid production, reducing the amount of medium, and suitable for the production of various types of long-chain dicarboxylic acids, etc.Type: ApplicationFiled: December 3, 2018Publication date: September 5, 2019Applicants: CATHAY R&D CENTER CO., LTD., CATHAY INDUSTRIAL BIOTECH LTD.Inventors: Min XU, Chen YANG, Bingbing QIN, Naiqiang LI, Xiucai LIU
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Publication number: 20190248726Abstract: The present disclosure provides a method for isolating a long chain dicarboxylic acid from fermentation broth containing microbial cells. Also provided is a substantially pure long chain dicarboxylic acid isolated by the method.Type: ApplicationFiled: July 11, 2016Publication date: August 15, 2019Applicants: CATHAY R&D CENTER CO., LTD., CATHAY INDUSTRIAL BIOTECH LTD.Inventors: Bingbing QIN, Yufeng YANG, Xiucai LIU
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Publication number: 20190055186Abstract: Provided is a method for extracting a 1,5-pentanediamine from a solution system containing a 1,5-pentanediamine salt. The method comprises adding to the solution system an insoluble basic substance to form a solution system containing free 1,5-pentanediamine. The provided method has high applicability, is easy to use, and is environmentally-friendly, significantly lowering raw material costs and operating costs for the entire manufacturing process. The method achieves a high recovery rate for pentanediamine, and is more suitable for industrial-scale production.Type: ApplicationFiled: September 7, 2016Publication date: February 21, 2019Applicants: Cathay R&D Center Co., Ltd., Cathay Industrial Biotech Ltd.Inventors: Xiucai Liu, Bingbing Qin, Chen Yang
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Publication number: 20180215698Abstract: The present invention relates to a method for the purification of cadaverine from an aqueous cadaverine salt composition comprising one or more involatile impurities, the method comprising: (1) mixing the aqueous cadaverine salt composition with one or more bases to provide an aqueous cadaverine composition having a pH of at least about 12; (2) distilling or evaporating the aqueous cadaverine composition to produce an aqueous cadaverine solution, wherein one or more solvents are added to the evaporation/distillation system before the evaporation/distillation stops, and the one or more solvents comprise at least one or more high boiling point (HBP) solvents having a boiling point of at least 185° C. (1 atm); and (3) subjecting the aqueous cadaverine solution to one or more rectification steps to provide a cadaverine product.Type: ApplicationFiled: February 21, 2018Publication date: August 2, 2018Applicants: CATHAY R&D CENTER CO., LTD., CATHAY INDUSTRIAL BIOTECH LTD.Inventors: Xiucai LIU, Charlie LIU, Bingbing QIN, Naiqiang LI, Yang CHEN
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Patent number: 9919996Abstract: The invention relates to a method for preparing cadaverine comprising: (1) obtaining an aqueous cadaverine salt composition from a fermentation system; (2) adjusting the pH of the aqueous cadaverine salt composition to a pH of at least about 12 by adding an inorganic base composition to provide a first composition comprising an aqueous cadaverine composition having a pH of at least about 12 and a solid composition comprising one or more alkali metal sulfates; (3) subjecting the first composition to solid-liquid separation without organic solvent extraction to provide the aqueous cadaverine composition and the solid composition; (4) distilling or evaporating the aqueous cadaverine composition of step (3) without organic solvent extraction to provide purified cadaverine; (5) preparing a saturated solution of the alkali metal sulfate(s) from the solid composition of step (3) at a temperature of about 35-40° C.Type: GrantFiled: January 16, 2017Date of Patent: March 20, 2018Assignees: CATHAY R&D CENTER CO., LTD., CATHAY INDUSTRIAL BIOTECH LTD.Inventors: Xiucai Liu, Charlie Liu, Bingbing Qin, Naiqiang Li, XiaoMing Li