Patents Assigned to Beijing University of Chemical Technology
  • Patent number: 11524901
    Abstract: This invention provides a method for efficiently separating magnesium and lithium from salt lake brine, and simultaneously preparing high-purity magnesium oxide and battery-grade lithium carbonate. The detailed processing steps are as follows: (1) adding urea into the brine to dissolve, (2) placing the solution into the reactor for hydrothermal reaction, the magnesium ion will precipitate and enter the solid phase; (3) filtering and drying the production to get the magnesium carbonate solid, while the lithium ion remains in the liquid phase; (4) after directly concentration and precipitation, the battery-grade lithium carbonate can be obtained, while the calcination of solid-phase product results in the high-purity magnesium oxide. In this method, urea is used as the precipitant to separate magnesium and lithium in salt lake without introducing any new metal ion, and the brine solution is not diluted. The solid product is white and fluffy powder, which is easy to filter and separate.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: December 13, 2022
    Assignee: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Xu Xiang, Xue Duan
  • Publication number: 20220363821
    Abstract: The present disclosure discloses a butenediol-based polyester elastomer and a method for preparing same. In the present disclosure, 1,4-butenediol containing high-stability double-bond is used to replace itaconic acid, and a series of butenediol-based polyester elastomers with high molecular weight and narrow distribution are synthesized, which have high relative molecular weight and narrow relative molecular weight distribution. The crosslinking in subsequent processing is more controllable, and the dosage of a vulcanizing agent is equivalent to that of traditional rubber.
    Type: Application
    Filed: July 15, 2022
    Publication date: November 17, 2022
    Applicants: Beijing University of Chemical Technology, Red Avenue New Materials Group Co., Ltd.
    Inventors: Zhao WANG, Qinan ZHANG, Liqun ZHANG, Wencai WANG, Ning ZHANG, Yanchao ZHAO
  • Patent number: 11454567
    Abstract: The present disclosure relates to a fault diagnosis method of a reciprocating machinery based on a keyphasor-free complete-cycle signal. The method includes the following steps: 1) building a complete-cycle vibration signal image library; 2) training an image recognition model; 3) acquiring a complete-cycle data on a keyphasor-free basis; 4) building an automatic feature extraction model; and 5) inputting a hidden layer feature of an autoencoder into a support vector machine (SVM) classifier to obtain a diagnosis result. By using a deep cascade convolutional neural network (CNN), the present disclosure achieves the goal of complete-cycle data acquisition on a keyphasor-free basis, solves the problems that traditional intelligent fault diagnosis relies on a keyphasor signal and real-time diagnosis fails due to insufficient installation space. In addition, by using an autoencoder for automatic feature extraction, the present disclosure avoids manual feature selection, reduces labor costs.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: September 27, 2022
    Assignee: Beijing University of Chemical Technology
    Inventors: Jinjie Zhang, Zhinong Jiang, Haipeng Zhao, Zhiwei Mao, Kun Chang
  • Publication number: 20220275571
    Abstract: The invention discloses a composition for fiber surface treatment and a process for treating a fiber. The fiber surface treatment composition of the invention includes maleic anhydride polymer, epoxy resin, blocked isocyanate, curing agent, rubber latex, solvent and optional filler. The fiber treated by the invention has excellent adhesion effects, reaching or even exceeding the adhesion level of RFL treatment.
    Type: Application
    Filed: July 2, 2020
    Publication date: September 1, 2022
    Applicant: Beijing University of Chemical Technology
    Inventors: Nanying Ning, Wei Huang, Ming Tian, Wencai Wang, Liqun Zhang, Bing Yu
  • Patent number: 11414324
    Abstract: Described is a method for extracting lithium from salt lake brine and simultaneously preparing aluminum hydroxide. This method includes a. adding an aluminum salt to the brine, adding an alkali solution, then subjecting to crystallization reaction and solid-liquid separation to obtain lithium-containing brine; b. evaporating and concentrating the lithium-containing brine, adding an aluminum salt, adding an alkali solution dropwise to perform a co-precipitation reaction and solid-liquid separation to obtain a lithium-containing layered material filter cake, wherein in steps a and b, the alkali solution is an alkali solution free of carbonate ion; c. dispersing the lithium-containing layered material filter cake in deionized water to form a suspension slurry, then adjusting the pH value of the suspension slurry so as to carry out a lithium deintercalation reaction; d. filtering to obtain aluminum hydroxide filter cake; e. washing the aluminum hydroxide filter cake with deionized water and drying.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: August 16, 2022
    Assignee: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Xu Xiang, Xue Duan
  • Patent number: 11362565
    Abstract: An electromagnetic automatic balancing device based on radial excitation includes a shell, a rotatory ring, a stationary ring, a pair of connecting bearings and a controller. The rotatory ring includes two bilaterally symmetrical outer excitation magnetic rings, two bilaterally symmetrical inner excitation magnetic rings, two bilaterally symmetrical counterweight discs, two bilaterally symmetrical first counterweight blocks, two bilaterally symmetrical second counterweight blocks and a pair of rotatory-ring bearings. The stationary ring includes a stator, two bilaterally symmetrical excitation frameworks and two bilaterally symmetrical coils. The rotatory ring and the stationary ring are installed in the shell and connected through a pair of connecting bearings. The stator is installed in the center of the shell. The excitation frameworks are respectively fixed at both ends of the stator.
    Type: Grant
    Filed: December 24, 2021
    Date of Patent: June 14, 2022
    Assignee: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Xin Pan, Hai-Qi Wu, Zhi-Nong Jiang, Jin-Ji Gao
  • Patent number: 11325063
    Abstract: Disclosed is a production device and production method of electronic grade hydrofluoric acid. The method includes vaporizing the raw material industrial anhydrous hydrogen fluoride by an evaporator, transporting the vaporized hydrogen fluoride to a purification tower, obtaining a high purity hydrogen fluoride gas through rectification, transporting the high purity hydrogen fluoride gas to an absorption tower for absorption by a certain concentration of hydrofluoric acid in the liquid phase, obtaining the crude electronic grade hydrofluoric acid, and obtaining the electronic grade hydrofluoric acid product through ultrapure filtration. The disclosure overcomes the technical problems of small yield and low purity of the prior art. The production process meets the requirements of environmental protection. The disclosure is suitable for industrialized large-scale production.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: May 10, 2022
    Assignee: Beijing University of Chemical Technology
    Inventor: Qunsheng Li
  • Patent number: 11231038
    Abstract: A load identification method for reciprocating machinery based on information entropy and envelope features of an axis trajectory of a piston rod. According to the present disclosure, firstly, the position of an axial center is calculated according to a triangle similarity theorem to obtain an axial center distribution; secondly, features are extracted from the axial center distribution of the piston rod by means of an improved envelope method for discrete points as well as an information entropy evaluation method; thirdly, a dimensionality reduction is carried out on the features by means of manifold learning to form a set of sensitive features of the load; and finally, a neural network is trained to obtain a load identification classifier to fulfill automatic identification on the operating load of the reciprocating machinery. The advantages of the present disclosure are verified by means of actual data of a piston rod of a reciprocating compressor.
    Type: Grant
    Filed: November 4, 2020
    Date of Patent: January 25, 2022
    Assignee: Beijing University of Chemical Technology
    Inventors: Jinjie Zhang, Zhinong Jiang, Xudong Zhang, Zhiwei Mao, Yao Wang
  • Patent number: 11173469
    Abstract: The present invention discloses an efficient mass-transfer separation bulk filler structure, which includes a bulk filler body with closely-fit multilayer structures, wherein an annular wall surface of the bulk, filler body has a corrugated angle group. A lower portion of the bulk filler body is of a bell-mouth shape. Three passages with a same sectional area are formed inside the bulk filler body. The present invention has the characteristics of small pressure drop, large specific surface area, low liquid holdup and large void ratio. The annular wall surface is provided with the corrugated angle group to increase the disturbance and reduce a double-membrane thickness of vapor and liquid phase mass-transfer resistance, thereby improving the mass-transfer coefficient and separation efficiency. Meanwhile, by adopting the bell-mouth shape, the stability and natural stacking regularity of the bulk filler can be improved.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: November 16, 2021
    Assignee: Beijing University of Chemical Technology
    Inventor: Qunsheng Li
  • Patent number: 11141724
    Abstract: A method for efficiently catalyzing furfural to prepare cyclopentanone, and a catalyst and preparation method therefor, are disclosed, in the field of biomass catalytic conversion. The catalyst comprises uniformly dispersed metal active center nanoparticles and oxides obtained by LDHs calcination. The metal active center is single atom Pt/Cu alloy; the LDHs is used as a precursor to prepare a Cu-containing catalyst precursor; after a reduction in H2 atmosphere, small amount of Pt2+ is used for reacting with the Cu-containing catalyst precursor to obtain a monoatomic Pt/Cu catalyst; said catalyst is used to catalyze hydrogenation of an aqueous phase of furfural to prepare cyclopentanone, wherein the reaction temperature is 120-250° C., the reaction pressure is 0.1-5 MPa, the reaction time is 0.5-24 hours, and the reaction solvent is ultrapure water. Low-cost and efficient, the catalyst catalyzes the hydrogenation of an aqueous phase of furfural to prepare cyclopentanone.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: October 12, 2021
    Assignee: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Jing He, Yanru Zhu, Zhe An
  • Publication number: 20210255059
    Abstract: The present disclosure relates to a fault diagnosis method of a reciprocating machinery based on a keyphasor-free complete-cycle signal. The method includes the following steps: 1) building a complete-cycle vibration signal image library; 2) training an image recognition model; 3) acquiring a complete-cycle data on a keyphasor-free basis; 4) building an automatic feature extraction model; and 5) inputting a hidden layer feature of an autoencoder into a support vector machine (SVM) classifier to obtain a diagnosis result. By using a deep cascade convolutional neural network (CNN), the present disclosure achieves the goal of complete-cycle data acquisition on a keyphasor-free basis, solves the problems that traditional intelligent fault diagnosis relies on a keyphasor signal and real-time diagnosis fails due to insufficient installation space. In addition, by using an autoencoder for automatic feature extraction, the present disclosure avoids manual feature selection, reduces labor costs.
    Type: Application
    Filed: February 2, 2021
    Publication date: August 19, 2021
    Applicant: Beijing University of Chemical Technology
    Inventors: Jinjie ZHANG, Zhinong JIANG, Haipeng ZHAO, Zhiwei MAO, Kun CHANG
  • Patent number: 11078907
    Abstract: The embodiments of the present disclosure disclose a scroll type micro-compressor, and a method for machining a fixed scroll plate and an orbit scroll plate thereof. The scroll type micro-compressor comprises a fixed scroll plate and an orbit scroll plate each integrally made with a monocrystalline silicon substrate; the compressor device has an Oldham ring structure, and reduces a mass of the orbit scroll plate by optimizing a design of a substrate of the orbit scroll plate; a cross-sectional shape of a plurality of micropores provided on a lower surface of the fixed scroll plate is set as of a fan ring, in which an electrode material is accommodated to maintain an electric field uniformity and reduce an electric field loss; and hydrophilia of inner surfaces is changed to prevent a top leakage and facilitate capillary filling of a compression chamber.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: August 3, 2021
    Assignee: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Duli Yu, Xiaoxing Xing, Chaomin Zhang
  • Patent number: 11067596
    Abstract: A method for calibrating phase-frequency characteristics of low frequency accelerometer based on time-spatial synchronization, comprises: measuring excitation displacement of the low frequency accelerometer to realize excitation acceleration measurement of the low frequency accelerometer; realizing alignment of the excitation acceleration signal of the low frequency accelerometer with output voltage signal of the low frequency accelerometer in the spatial domain based on TSS technology, fitting the excitation acceleration signal and the output voltage signal respectively by SAM, and calculating phase ?F of the excitation acceleration signal at a zero position of horizontal long-stroke shaker and phase ?Z of the output voltage signal at the time when a zero encoder on the shaker outputs pulse; and calculating the sensitivity phase of the low frequency accelerometer with ?Z and ?F, and determining phase-frequency characteristics of the low frequency accelerometer by calibrating the sensitivity phases at differe
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: July 20, 2021
    Assignees: National Institute of Metrology, Beijing University of Chemical Technology
    Inventors: Chenguang Cai, Ming Yang, Zhihua Liu, Hao Cheng, Cuiyun Jin
  • Publication number: 20210214531
    Abstract: The present disclosure relates to gutta-percha containing carbon nanotubes and a preparation method therefor. The gutta-percha is prepared by mixing a raw material, prepared from the following components of eucommia ulmoide gum, zinc oxide and carbon nanotubes, and extruding the mixed raw material. An orientation factor of the carbon nanotubes in the gutta-percha is greater than 10.8. The preparation method comprises: mixing the components according to dosages, and extruding a mixed product to prepare the gutta-percha containing carbon nanotubes.
    Type: Application
    Filed: March 30, 2021
    Publication date: July 15, 2021
    Applicants: Beijing University of Chemical Technology, Peking University Hospital of Stomatology
    Inventors: Jichuan ZHANG, Mengjie DONG, Li LIU, Xiubo QU, Xiaoyan WANG, Chongyang YUAN, Yang YU
  • Publication number: 20210140431
    Abstract: A load identification method for reciprocating machinery based on information entropy and envelope features of an axis trajectory of a piston rod. According to the present disclosure, firstly, the position of an axial center is calculated according to a triangle similarity theorem to obtain an axial center distribution; secondly, features are extracted from the axial center distribution of the piston rod by means of an improved envelope method for discrete points as well as an information entropy evaluation method; thirdly, a dimensionality reduction is carried out on the features by means of manifold learning to form a set of sensitive features of the load; and finally, a neural network is trained to obtain a load identification classifier to fulfill automatic identification on the operating load of the reciprocating machinery. The advantages of the present disclosure are verified by means of actual data of a piston rod of a reciprocating compressor.
    Type: Application
    Filed: November 4, 2020
    Publication date: May 13, 2021
    Applicant: Beijing University of Chemical Technology
    Inventors: Jinjie Zhang, Zhinong Jiang, Xudong Zhang, Zhiwei Mao, Yao Wang
  • Patent number: 10913052
    Abstract: The purpose of the invention is to provide a supported bimetallic core-shell structure catalyst and its preparation method. Supporter, metal salt and reducing agent solution are mixed to synthesize the catalyst M@PdM/ZT by using a one-step synthesis method, wherein the active metal particle M@PdM as core-shell structure, M Is the core representing one of the Ag, Pt, Au and Ir. ZT is the supporter, representing one of hydrotalcite (Mg2Al-LDH), alumina (Al2O3) and silica (SiO2). By changing the temperature and the reaction time to control the kinetic behavior of the reduction of two kinds of metal ions to realize the construction of core-shell structure. Active metal particle composition and shell thickness are regulated by controlling metal ion concentration. The bimetallic core-shell catalyst prepared by this method showed excellent selectivity and stability in acetylene selective hydrogenation and anthraquinone hydrogenation.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: February 9, 2021
    Assignee: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Dianqing Li, Rui Ma, Yufei He, Yongjun Feng, Junting Feng
  • Patent number: 10864521
    Abstract: The present invention relates to a detection mechanism for polymerase chain reaction and a polymerase chain reaction device, wherein the detection mechanism comprises at least one excitation module group, each of the excitation module groups comprising two excitation modules for providing excitation light with two wavelengths; an excitation optical fiber, connected to the excitation modules, the excitation optical fiber transmitting the excitation light to at least one reaction tube, each of the reaction tubes receiving excitation light with two wavelengths; a receiving optical fiber, for collecting and transmitting a fluorescent signal from the reaction tube; at least one receiving module group, connected to the receiving optical fiber, each of the receiving module groups comprising two receiving modules, to respectively receive the fluorescent signal of two wavelengths from the same said reaction tube, and convert the fluorescent signal into an electrical signal for output; the detection mechanism is config
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: December 15, 2020
    Assignees: Beijing Wantai Biological Pharmacy Enterprise Co., Ltd., Beijing University of Chemical Technology, Xiamen University
    Inventors: Xianbo Qiu, Xiangzhong Ye, Shengxiang Ge, Shiyin Zhang, Pengfei Gao, Shangzhi Ji, Yongliang Yang, Zixin Qiu, Ningshao Xia
  • Patent number: 10780390
    Abstract: Provided are a gas phase oxidation/decomposition and absorption integrated device and application thereof in a gas-liquid system. The device comprises a housing (100), a motor (102), and a boost regulator (103); the housing (100) is internally provided with a rotating chamber (120) and a discharge chamber (122); the rotating chamber (120) comprises a rotating shaft (119), a turntable (124), a liquid distributor (123), packing layers (110), a guiding round table (111), a liquid inlet (108), a liquid outlet (112), and a first gas outlet (109); the discharge chamber (122) is located under the rotating chamber (120) and comprises a discharge chamber housing (121) and a plasma generator.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: September 22, 2020
    Assignee: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Guangwen Chu, Yong Cai, Jianfeng Chen, Yong Luo, Haikui Zou, Baochang Sun
  • Patent number: 10556845
    Abstract: Disclosed are a system device for preparing an alkylate oil using a sulfuric acid catalyst and a manufacturing method thereof. The system device comprises a reactor unit (100), a catalyst and hydrocarbon circulation unit (200), a separator unit (300), an isobutane circulation unit (500) and a fractionator unit (400). The reactor unit (100) is connected and in communication with the catalyst and hydrocarbon circulation unit (200) and the separator unit (300) via channels respectively. The catalyst and hydrocarbon circulation unit (200) is connected and in communication with the separator unit (300) via channels. The separator unit (300) is connected and in communication with the isobutane circulation unit (500) and the fractionator unit (400) via channels respectively. The catalyst and hydrocarbon circulation unit (200), the separator unit (300), the isobutane circulation unit (500) and the fractionator unit (400) are connected and in communication with the reactor unit (100) via channels respectively.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: February 11, 2020
    Assignee: Beijing University of Chemical Technology
    Inventors: Haikui Zou, Guangwen Chu, Jianfeng Chen, Yong Luo, Baochang Sun, Yang Xiang
  • Publication number: 20200038804
    Abstract: Provided are a gas phase oxidation/decomposition and absorption integrated device and application thereof in a gas-liquid system. The device comprises a housing (100), a motor (102), and a boost regulator (103); the housing (100) is internally provided with a rotating chamber (120) and a discharge chamber (122); the rotating chamber (120) comprises a rotating shaft (119), a turntable (124), a liquid distributor (123), packing layers (110), a guiding round table (111), a liquid inlet (108), a liquid outlet (112), and a first gas outlet (109); the discharge chamber (122) is located under the rotating chamber (120) and comprises a discharge chamber housing (121) and a plasma generator.
    Type: Application
    Filed: April 16, 2018
    Publication date: February 6, 2020
    Applicant: BEIJING UNIVERSITY OF CHEMICAL TECHNOLOGY
    Inventors: Guangwen CHU, Yong CAI, Jianfeng CHEN, Yong LUO, Haikui ZOU, Baochang SUN