Amorphous mesoporous and macroporous alumina with an optimized pore distribution, and process for its preparation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01F-007/34
B01J-037/03
B01J-021/04
B01J-035/10
B01J-037/00
C01F-007/44
B01J-020/08
B01J-020/28
B01J-020/30
B01J-037/08
출원번호
US-0318017
(2015-06-09)
등록번호
US-10233090
(2019-03-19)
우선권정보
FR-14 55411 (2014-06-13)
국제출원번호
PCT/EP2015/062824
(2015-06-09)
국제공개번호
WO2015/189198
(2015-12-17)
발명자
/ 주소
Boualleg, Malika
Bouvry, Celine
출원인 / 주소
IFP ENERGIES NOUVELLES
대리인 / 주소
Millen, White, Zelano and Branigan, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A process for the preparation of an amorphous mesoporous and macroporous alumina: at least once dissolving an acidic precursor of aluminium, adjusting pH by adding at least one basic precursor to the suspension obtained in a), co-precipitation of the suspension obtained from b) by adding at least on
A process for the preparation of an amorphous mesoporous and macroporous alumina: at least once dissolving an acidic precursor of aluminium, adjusting pH by adding at least one basic precursor to the suspension obtained in a), co-precipitation of the suspension obtained from b) by adding at least one basic precursor and at least one acidic precursor to the suspension, filtration, drying, shaping and heat treatment. An amorphous mesoporous and macroporous alumina with bimodal pore structure: a specific surface area SBET more than 100 m2/g;a median mesopore diameter, by volume determined by mercury intrusion porosimetry, 18 nm or more;a median macropore diameter, by volume determined by mercury intrusion porosimetry, 100 to 1200 nm, limits included;a mesopore volume, as measured by mercury intrusion porosimetry, 0.7 mL/g or more;and a total pore volume, as measured by mercury porosimetry, 0.8 mL/g or more.
대표청구항▼
1. A process for the preparation of an amorphous mesoporous and macroporous alumina, said process comprising at least: a) dissolving an acidic precursor of aluminium that is aluminium sulphate, aluminium chloride or aluminium nitrate in water, at a temperature of 20° C. to 90° C., at a pH of 0.5 to
1. A process for the preparation of an amorphous mesoporous and macroporous alumina, said process comprising at least: a) dissolving an acidic precursor of aluminium that is aluminium sulphate, aluminium chloride or aluminium nitrate in water, at a temperature of 20° C. to 90° C., at a pH of 0.5 to 5, for a period of 2 to 60 minutes;adjusting the pH to 7 to 10 by adding, to the suspension obtained in a), a solution consisting of at least one basic precursor, at a temperature of 20° C. to 90° C. and for a period of 5 to 30 minutes, which basic precursor is at least one of sodium aluminate, potassium aluminate, ammonia, sodium hydroxide or potassium hydroxide;c) co-precipitation of the suspension obtained at the end of b) by adding to the suspension at least one basic precursor that is sodium aluminate, potassium aluminate, ammonia, sodium hydroxide or potassium hydroxide and at least one acidic precursor that is aluminium sulfate, aluminium chloride, aluminium nitrate, sulphuric acid, hydrochloric acid or nitric acid, at least one of the basic or acidic precursors comprising aluminium, the relative flow rate of the acidic and basic precursors being selected so as to obtain a pH of 7 to 10 in the reaction medium and the flow rate of the acidic and basic precursor or precursors containing aluminium being adjusted so as to obtain a final concentration of alumina in the suspension of 10 to 38 g/L;d) filtration of the suspension obtained at the end of the co-precipitation c) in order to obtain an alumina gel;e) drying said alumina gel obtained in d) in order to obtain a powder;f) shaping the powder obtained at the end of e) in order to obtain a green material;g) heat treatment of the green material obtained at the end of f) at a temperature of 500° C. to 1000° C., optionally in the presence of a stream of air containing up to 60% by volume of water, wherein an alumina having 10% to 35% by volume of macropores based on total pore volume is produced. 2. The process according to claim 1, in which the concentration of alumina in the suspension of alumina gel obtained in c) is 13 to 35 g/L. 3. The process according to claim 2, in which the concentration of alumina in the suspension of alumina gel obtained in c) is 15 to 33 g/L. 4. The process according to claim 1, in which the acidic precursor is aluminium sulfate. 5. The process according to claim 1, in which the basic precursor is sodium aluminate. 6. The process according to claim 1, in which in a), b), and c), the aqueous reaction medium is water and reaction is carried out with stirring, in the absence of an organic additive. 7. The process according to claim 1, in which the acidic precursor of a) is introduced in a quantity corresponding to 0.5% to 4% of the total weight of the alumina formed at the end of c).
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이 특허에 인용된 특허 (4)
Sanchez Moises G. (Severna Park MD) Herrera Jose E. (Ellicott City MD), Extruded alumina catalyst support having controlled distribution of pore sizes.
Ginestra, Josiane M.; Ackerman, Russell C.; Michel, Christian G., Method of making alumina having bimodal pore structure, and catalysts made therefrom.
Ackerman, Russell Craig; Ginestra, Josiane Marie-Rose; Michel, Christian Gabriel, Process and catalyst for the hydroconversion of a heavy hydrocarbon feedstock.
Ginestra, Josiane Marie-Rose; Ackerman, Russell Craig; Michel, Christian Gabriel, Process and catalyst for the hydroconversion of a heavy hydrocarbon feedstock.
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