Abstract: This invention disclosed a method for producing 1,2-propylene glycol from bio-based glycerol. In this method, a CuO—CeO2—SiO2 catalyst is filled into a fixed bed reactor, a glycerol solution is flowed into the reactor together with hydrogen gas in a manner of top feeding, and controlling the reaction temperature to be 170˜200° C., the reaction pressure to be 1.0˜5.0 MPa, so as to realize the production of 1,2-propylene glycol from the hydrogenation of glycerol. The catalyst used in this invention can sustain a high selectivity for the target product and a high conversion for glycerol for 500 hours.
Type:
Grant
Filed:
September 26, 2008
Date of Patent:
September 8, 2009
Assignee:
Lanzhou Institute of Chemical Physics, Chinese Academy of Science
Inventors:
Fang Cui, Jing Chen, Chungu Xia, Haixiao Kang, Xinzhi Zhang, Jin Tong, Xuemei Li
Abstract: This invention describes a method for preparing polymethoxymethylal. By this method, polymethoxymethylal is prepared by a catalytic reaction using methanol and trioxymethylene as reactants and using an ionic liquid as catalyst under a relatively moderate reaction condition. The catalyst of this invention has a high catalytic activity and a high conversion; the reaction process is simple, easy to be operated and has a strong controllability; the distribution of the products after reaction is superior and the utilization ratio of the raw materials is high.
Type:
Grant
Filed:
July 28, 2008
Date of Patent:
July 14, 2009
Assignee:
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
Abstract: This invention disclosed a method for producing 1,2-propylene glycol from bio-based glycerol. In this method, a CuO—CeO2—SiO2 catalyst is filled into a fixed bed reactor, a glycerol solution is flowed into the reactor together with hydrogen gas in a manner of top feeding, and controlling the reaction temperature to be 170˜200° C., the reaction pressure to be 1.0˜5.0 MPa, so as to realize the production of 1,2-propylene glycol from the hydrogenation of glycerol. The catalyst used in this invention can sustain a high selectivity for the target product and a high conversion for glycerol for 500 hours.
Type:
Application
Filed:
September 26, 2008
Publication date:
June 18, 2009
Applicant:
LANZHOU INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCE
Inventors:
Fang Cui, Jing Chen, Chungu Xia, Haixiao Kang, Xinzhi Zhang, Jin Tong, Xuemei Li
Abstract: This invention describes a method for preparing polymethoxymethylal. By this method, polymethoxymethylal is prepared by a catalytic reaction using methanol and trioxymethylene as reactants and using an ionic liquid as catalyst under a relatively moderate reaction condition. The catalyst of this invention has a high catalytic activity and a high conversion; the reaction process is simple, easy to be operated and has a strong controllability; the distribution of the products after reaction is superior and the utilization ratio of the raw materials is high.
Type:
Application
Filed:
July 28, 2008
Publication date:
February 5, 2009
Applicant:
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences
Abstract: The present invention relates to a process for synthesizing trioxymethylene, wherein an aqueous solution of formaldehyde is used as the reactant; and an acidic ionic liquid in an amount of from 0.01 to 10 wt % is used as a catalyst.
Type:
Application
Filed:
January 18, 2008
Publication date:
November 27, 2008
Applicants:
Lanzhou Institute of Chemical Physics Chinese Academy of Sciences, Blue Diamond International Co., Ltd.
Abstract: The present invention relates to a method of synthesizing trioxymethylene from formaldehyde by the catalytic action of an acidic ionic liquid. In the method, formaldehyde solution with a concentration of 30˜80 wt % is used as reactant, and an ionic liquid is used as catalyst. The cation moiety of the catalyst is selected from either imidazoles cation or pyridines cation, and the anion moiety of the catalyst is selected from one of p-tolyl benzene sulfonate, trifluoromethyl sulfonate, and hydrogen sulfate. In the present invention, ionic liquid is used, for the first time, as a catalyst to synthesize trioxymethylene from formaldehyde. The catalyst can be circularly used for continuous sampling.
Type:
Grant
Filed:
December 8, 2006
Date of Patent:
July 17, 2007
Assignee:
Lanzhou Institute of Chemical Physics Chinese Academy of Sciences
Abstract: The present invention relates to a method of synthesizing trioxymethylene from formaldehyde by the catalytic action of an acidic ionic liquid. In the method, formaldehyde solution with a concentration of 30˜80 wt % is used as reactant, and an ionic liquid is used as catalyst. The cation moiety of the catalyst is selected from either imidazoles cation or pyridines cation, and the anion moiety of the catalyst is selected from one of p-tolyl benzene sulfonate, trifluoromethyl sulfonate, and hydrogen sulfate. In the present invention, ionic liquid is used, for the first time, as a catalyst to synthesize trioxymethylene from formaldehyde. The catalyst can be circularly used for continuous sampling.
Type:
Application
Filed:
December 8, 2006
Publication date:
June 14, 2007
Applicant:
Lanzhou Institute of Chemical Physics Chinese Academy of Sciences
Abstract: The invention relates to a class of novel Brønsted acidic ionic liquids each having a lactam cation, and to a method for preparing the same through simple neutralization reaction of a lactam, which is available in large scale from industry, with a Brønsted inorganic or organic acid under room temperature. The properties of the lactam Brønsted acidic ionic liquids are as follows: they are water- and moisture-stable; they are more environmentally benign and lower cost than that of dialkylimidazolium salts; they have stronger Brønsted acidity and can be used as acidic catalysts and media instead of inorganic corrosive acids, such as concentrated sulfuric acid and hydrofluoric acid, in many acid-catalyzed reactions; and they can also be used as green media for extraction and separation.
Type:
Grant
Filed:
July 21, 2005
Date of Patent:
May 22, 2007
Assignee:
Lanzhou Institute of Chemical Physics Chinese Academy of Sciences
Inventors:
Youquan Deng, Zhengyin Du, Shu Guo, Zuopeng Li, Laiying Zhu