Method for producing 1,2-propylene glycol using bio-based glycerol
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C07C-029/132
C07C-029/00
출원번호
UP-0232982
(2008-09-26)
등록번호
US-7586016
(2009-09-22)
우선권정보
CN-2007 1 0305964(2007-12-13)
발명자
/ 주소
Cui, Fang
Chen, Jing
Xia, Chungu
Kang, Haixiao
Zhang, Xinzhi
Tong, Jin
Li, Xuemei
출원인 / 주소
Lanzhou Institute of Chemical Physics, Chinese Academy of Science
대리인 / 주소
Buchanan, Ingersoll & Rooney PC
인용정보
피인용 횟수 :
1인용 특허 :
0
초록▼
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 react
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.
대표청구항▼
The invention claimed is: 1. A method for producing 1,2-propylene glycol from bio-based glycerol, characterized in that, in the 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
The invention claimed is: 1. A method for producing 1,2-propylene glycol from bio-based glycerol, characterized in that, in the 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 the reaction temperature is controlled to be 170˜200° C. and the reaction pressure is controlled to be 1.0˜5.0 MPa, thereby the production of 1,2-propylene glycol from the hydrogenation of glycerol is achieved; in the CuO--CeO2--SiO2 catalyst, the mass percent content of CuO is 30˜70 wt % and the mass percent content of CeO2 is 3˜15 wt %; the solvent in the glycerol solution is selected from a group consisting of methanol, water, or the mixture of methanol and water. 2. The method according to claim 1, characterized in that the concentration of the glycerol solution is 40˜80 wt %. 3. The method according to claim 1, characterized in that the mass space velocity of the glycerol solution is 0.1˜2.0/h. 4. The method according to claim 1, characterized in that the volume ratio of the hydrogen gas and the glycerol solution is 2500˜1000:1. 5. The method according to claim 1, characterized in that the preparation method of the catalyst comprising: a, selecting an aqueous solution of copper nitrate, copper chloride, copper sulfate or copper acetate and precipitating it with a NaOH solution of 10 wt %˜20 wt % to form a slurry A with a pH of 7˜10; b, mixing the slurry A with a silica sol and aging for 2˜6 hours at a temperature of 30˜100° C., then filtering and washing; drying for 12˜24 hours at 80˜120° C. and baking for 2˜6 hours at 300˜600° C., whereby a catalyst consisting of CuO--SiO2 being formed; c, dipping the CuO--SiO2 in a cerium nitrate solution, drying for 2˜8 hours at 80˜120° C. and baking for 2˜6 hours at 300˜600° C. to form a catalyst consisting of CuO--CeO2--SiO2; and d, at a temperature of 160˜450° C., reducing and activating for 3˜18 hours with hydrogen gas or the mixed gas of hydrogen gas and nitrogen gas, to produce the catalyst. 6. The method according to claim 5, characterized in that the concentration of the aqueous solution of copper nitrate, copper chloride, copper sulfate or copper acetate is 0.05˜1.0 mol/L. 7. The method according to claim 5, characterized in that in step b in the preparation of the catalyst, the baking is performed for 3˜4 hours at 300˜450° C.
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이 특허를 인용한 특허 (1)
Ding, Zhongyi; Chiu, Joseph; Jin, Weihua, Process for converting glycerin into propylene glycol.
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