US5350722A
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MTW-type zeolite and its preparation process
Assignee: IFP Energies nouvelles
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Filing: 1991-12-18
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Granted: 1994-09-27
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Expires: 2011-12-18
Abstract
Abstract PCT No. PCT/FR91/01029 Sec. 371 Date Aug. 20, 1992 Sec. 102(e) Date Aug. 20, 1992 PCT Filed Dec. 18, 1991 PCT Pub. No. WO92/11203 PCT Pub. Date Jul. 9, 1992.The invention relates to a synthetic crystalline zeolite of the MTW type, characterized by: a) the following approximate general formula: M2/nO, Al2O3, xSiO2 in which M represents a metal cation and/or proton, n is the valency of M and x is a number between 14 and 800, b) a X-ray diagram shown in table I of the description, c) a fluorine content between approximately 0.005 and 2% by weight, said zeolite having been synthesized in a fluoride medium and accompanied by stirring.
Inventors
- 👤 Jean-Francois Joly
- 👤 Philippe Caullet
- 👤 Anne-Catherine Faust
- 👤 Jacques Baron
- 👤 Jean-Louis Guth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:24
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/7034; C; C01; C01B; C01B39/00; C01B39/02; C01B39/42; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; Y; Y10; Y10S; Y10S423/00; Y10S423/33
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
Synthetic crystalline zeolite of the MTW type characterized by: a) the following approximate general formula: M.sub.2/n O, Al.sub.2 O.sub.3, xSiO.sub.2 in which M represents a metal cation and/or a proton, n is the valency of M and x is a number between 14 and 800, b) a X-ray diagram shown in table I of the description, c) a fluorine content between approximately 0.005 and 2% by weight, said zeolite having been synthesized in a fluoride medium, accompanied by stirring.
Claim 2
Dependent Claim
79 words
Synthetic crystalline zeolite of the MTW type characterized by: a) the following approximate general formula: M.sub.2/n O, Al.sub.2 O.sub.3, xSiO.sub.2 in which M represents a metal cation and/or a proton, n is the valency of M and x is a number between 14 and 800, b) a X-ray diagram shown in table I of the description, c) a fluorine content between approximately 0.005 and 2% by weight, said zeolite having been synthesized in a fluoride medium, accompanied by stirring.
Claim 3
Dependent Claim
16 words
Zeolite according to claim 1, characterized in that x is a number between 20 and 800.
Claim 4
Dependent Claim
25 words
Zeolite according to either of the claims 1 and 2, characterized in that it has a fluorine content between approximately 0.01 and 1.5% by weight.
Claim 5
Dependent Claim
15 words
Catalyst containing a zeolite according to claim 1 wherein said catalyst further comprises a matrix.
Claim 6
Dependent Claim
36 words
Catalyst containing a zeolite according to claim 1 wherein said catalyst further comprises a matrix at least one metal and/or metal compound chosen from among groups IA, VIB and VIII of the periodic classification of elements.
Claim 7
Dependent Claim
163 words
Process for the preparation of a zeolite according to claim 1, characterized in that: a) a reaction mixture in solution is formed having a pH below approximately 9 and containing water, at least one silica source, at least one aluminium source, at least one mobilizing agent source containing fluoride ions (F - ), at least one source of at least one structuring agent chosen from within the group formed by 1,4-diazabicyclo-(2,2,2)-octane and a mixture of 1,4-diazabicyclo-(2,2,2)-octane and methyl amine, said structuring agent optionally supplying organic cations, said reaction mixture having a composition, in molar ratio terms, within the following value ranges: Si/Al: 6-300, F - /Si: 0.1-8, H 2 O/Si: 4-50, (R+R')/Si: 0.5-4, R/R': 0.1-infinity, in which R is 1,4-diazabicyclo-(2,2,2)-octane and R' is methyl amine. b) the said reaction mixture is maintained under stirring at a heating temperature between approximately 100° and 250° C. until a crystalline compound is obtained and c) said compound is calcined at a temperature above approximately 350° C.
Claim 8
Dependent Claim
43 words
Process according to claim 6, wherein, in stage a), the reaction mixture has a composition, in molar ratio terms, within the following value ranges: Si/Al:10-300, F - /Si:0.2-6, H 2 O/Si:10-50, (R+R')/Si:0.5-4, R/R':0.2-infinity, in which R is 1,4-diazabicyclo-(2,2,2)-octane and R' is methyl amine.
Claim 9
Dependent Claim
43 words
Process according to claim 6, wherein, in stage a), said reaction mixture has a composition, in molar ratio terms, within the following value ranges: Si/Al:12-100 F - /Si:0.5-4, H 2 O/Si:20-40, (R+R')/Si:0.9-2.1, R/R':0.3-infinity in which R is 1,4-diazabicyclo-(2,2,2)-octane and R' is methyl amine.
Claim 10
Dependent Claim
28 words
Process according to any one of the claims 6 to 8, wherein, in stage a), said reaction mixture also incorporates an alkali metal and/or alkaline earth cation source.
Claim 11
Dependent Claim
37 words
Process according to claim 9, wherein, in stage b), said reaction mixture is maintained at a heating temperature between approximately 150° and 250° C., the reaction mixture being kept under stirring until a crystalline compound is obtained.
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