Patents by Inventor Zhengjiang Wang

Zhengjiang Wang 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).

  • Method and device for preparing 2-hydroxy-4-methylthiobutyric acid and intermediates thereof
    Patent number: 11130732
    Abstract: Provided by the present disclosure are a method and a device for preparing 2-hydroxy-4-methylthiobutyric acid and intermediates thereof; the intermediates for preparing 2-hydroxy-4-methylthiobutyric acid comprise 3-methylthiopropionaldehyde and 2-hydroxy-4-methylthiobutyronitrile. The method for preparing 2-hydroxy-4-methylthiobutyric acid provided by the present disclosure comprises: step (1), a step of reacting acrolein with methyl mercaptan to prepare 3-methylthiopropionaldehyde; step (2), a step of reacting 3-methylthiopropionaldehyde with hydrocyanic acid to prepare 2-hydroxy-4-methylthiobutyronitrile; and step (3), a step of hydrating 2-hydroxy-4-methylthiobutyronitrile by using sulfuric acid and then hydrolyzing to prepare 2-hydroxy-4-methylthiobutyric acid; wherein in steps (1), (2) and (3), the reaction status of the materials is detected online, and the proportions of the materials are controlled according to the detection results such that reactions are performed completely.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: September 28, 2021
    Assignees: ZHEJIANG NHU CO., LTD., ZHEJIANG UNIVERSITY, SHANDONG NHU AMINO ACID CO., LTD.
    Inventors: Zhirong Chen, Hong Yin, Baishan Hu, Zhengjiang Wang, Zhixuan Wang, Cong Chen, Guisheng Qiu, Qichuan Li, Qingai Shi
  • METHOD AND DEVICE FOR PREPARING 2-HYDROXY-4-METHYLTHIOBUTYRIC ACID AND INTERMEDIATES THEREOF
    Publication number: 20210147350
    Abstract: Provided by the present disclosure are a method and a device for preparing 2-hydroxy-4-methylthiobutyric acid and intermediates thereof; the intermediates for preparing 2-hydroxy-4-methylthiobutyric acid comprise 3-methylthiopropionaldehyde and 2-hydroxy-4-methylthiobutyronitrile.
    Type: Application
    Filed: August 27, 2019
    Publication date: May 20, 2021
    Applicants: ZHEJIANG NHU COMPANY LTD., ZHEJIANG UNIVERSITY, SHANDONG NHU AMINO ACID CO., LTD.
    Inventors: Zhirong Chen, Hong Yin, Baishan Hu, Zhengjiang Wang, Zhixuan Wang, Cong Chen, Guisheng Qiu, Qichuan Li, Qingai Shi
  • SMB service fault processing method and storage device
    Patent number: 10789138
    Abstract: In a method for processing a server message block (SMB) service fault, a first storage device generates a file handle according to a first file open instruction from a host, and sends the file handle to a second storage device. The second storage device stores the file handle as a backup handle. The second storage device activates an Internet Protocol (IP) address of the first storage device according to fault information from the first storage device, and establishes a communication connection to the host. After the second storage device determines a file handle matches the handle identifier, the second storage device opens a file. Hence, when a storage device that processes an SMB service is faulty, the SMB service may be taken over by a secondary storage device such that the SMB service is executed without interruption.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: September 29, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zhengjiang Wang, Xianqiang Luo, Yi He, Keji Huang, Jian Wu, Mingqian Zhang
  • Method for continuous preparation of high bulk density methionine crystal
    Patent number: 10293273
    Abstract: The present disclosure relates to a method for continuous preparation of high bulk density methionine crystals.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: May 21, 2019
    Assignees: Shandong Nhu Amino Acid Co. Ltd., Zhejiang University, Zhejiang Nhu Co., Ltd.
    Inventors: Zhirong Chen, Zhixuan Wang, Cong Chen, Zhengjiang Wang, Cunchao Wang, Yin Li, Zhixiang Zhang
  • SMB Service Fault Processing Method and Storage Device
    Publication number: 20180225183
    Abstract: In a method for processing a server message block (SMB) service fault, a first storage device generates a file handle according to a first file open instruction from a host, and sends the file handle to a second storage device. The second storage device stores the file handle as a backup handle. The second storage device activates an Internet Protocol (IP) address of the first storage device according to fault information from the first storage device, and establishes a communication connection to the host. After the second storage device determines a file handle matches the handle identifier, the second storage device opens a file. Hence, when a storage device that processes an SMB service is faulty, the SMB service may be taken over by a secondary storage device such that the SMB service is executed without interruption.
    Type: Application
    Filed: April 9, 2018
    Publication date: August 9, 2018
    Inventors: Zhengjiang Wang, Xianqiang Luo, Yi He, Keji Huang, Jian Wu, Mingqian Zhang
  • METHOD FOR CONTINUOUS PREPARATION OF HIGH BULK DENSITY METHIONINE CRYSTAL
    Publication number: 20180043281
    Abstract: The present disclosure relates to a method for continuous preparation of high bulk density methionine crystals.
    Type: Application
    Filed: December 23, 2015
    Publication date: February 15, 2018
    Inventors: Zhirong Chen, Zhixuan Wang, Cong Chen, Zhengjiang Wang, Cunchao Wang, Yin Li, Zhixiang Zhang