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US4902844A
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New zeolite SSZ-23 and xylene isomerization therewith
Assignee: Chevron USA Inc
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Filing: 1989-04-05
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Granted: 1990-02-20
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Expires: 2009-04-05
Abstract
Abstract A crystalline zeolite SSZ-23 is prepared using an adamantane quaternary ammonium ion as a template.
Inventors
- 👤 Stacey I. Zones
- 👤 R. A. Innes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:20
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/46; C01B39/48; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C01B33/181; C01B33/185; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2724; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2002/74
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
116 words
A method for preparing a zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of Table 1, comprising: (a) preparing an aqueous mixture containing sources of an adamantane quaternary ammonium ion, an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide and mixtures thereof, and an oxide selected from silicon oxide, germanium oxide, and mixtures thereof; (b) maintaining the mixture at a temperature of at least 140° C. until the crystals of said zeolite form; and (c) recovering said crystals.
Claim 2
Independent Claim
116 words
A method for preparing a zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of Table 1, comprising: (a) preparing an aqueous mixture containing sources of an adamantane quaternary ammonium ion, an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide and mixtures thereof, and an oxide selected from silicon oxide, germanium oxide, and mixtures thereof; (b) maintaining the mixture at a temperature of at least 140° C. until the crystals of said zeolite form; and (c) recovering said crystals.
Claim 3
Dependent Claim
69 words
The method according to claim 1 wherein the aqueous mixture has a composition in terms of mole ratios of oxides falling in the ranges: YO 2 /W 2 O 3 , 50:1 to 1500:1; Q/YO 2 , 0.05:1 to 0.80:1; wherein Y is selected from silicon, germanium and mixtures thereof, W is selected from aluminum, gallium, iron, boron and mixtures thereof, and Q is an adamantane quaternary ammonium ion.
Claim 4
Independent Claim
118 words
A method according to claims 1 or 2 wherein the adamantane quaternary ammonium ion is derived from an adamantane compound of the formula: ##STR3## wherein each of Y 1 Y 2 and Y 3 independently is lower alkyl and A.sup.⊖ is an anion which is not detrimental to the formation of the zeolite; and each of R 1 , R 2 and R 3 independently is hydrogen, or lower alkyl; and ##STR4## wherein each of R 4 , R 5 and R 6 independently is hydrogen or lower alkyl; each of Y 1 , Y 2 and Y 3 independently is lower alkyl; and A.sup.⊖ is an anion which is not detrimental to the formation of the zeolite.
Claim 5
Dependent Claim
81 words
A method according to claim 3 wherein in formula (a) each of Y 1 , Y 2 and Y 3 independently is methyl or ethyl; A.sup.⊖ is OH or halogen; and each of R 1 , R 2 , and R 3 is hydrogen; and in formula (b) each of Y 1 , Y 2 and Y 3 independently is methyl or ethyl; A.sup.⊖ is OH, or halogen; and each of R 4 , R 5 and R 6 is hydrogen.
Claim 6
Dependent Claim
28 words
A method according to claim 4 wherein Y 1 , Y 2 and Y 3 are the same and each is methyl; and A.sup.⊖ is OH, or I.
Claim 7
Dependent Claim
62 words
A process for converting hydrocarbons, comprising contacting a hydrocarbonaceous feed at hydrocarbon converting conditions with a zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of Table 1.
Claim 8
Dependent Claim
62 words
A process for converting hydrocarbons, comprising contacting a hydrocarbonaceous feed at hydrocarbon converting conditions with a zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of Table 1.
Claim 9
Dependent Claim
88 words
The process of claim 6 which is a process for isomerizing an isomerization feed containing an aromatic C 8 stream of ethylbenzene, or xylene isomers or mixtures thereof, wherein a more nearly equilibrium ratio of conversion conditions with a catalyst comprising a zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of Table 1.
Claim 10
Dependent Claim
15 words
The process of claim 7 wherein para-xylene content is enhanced and ethylbenzene content is reduced.
Claim 11
Dependent Claim
14 words
The process of claim 7 wherein said zeolite contains a Group VIII metal component.
Claim 12
Dependent Claim
14 words
The process of claim 9 wherein said Group VIII metal is platinum or nickel.
Claim 13
Dependent Claim
17 words
The process of claim 7 wherein said aromatic C 8 stream contains ethylbenzene, para-xylene, meta-xylene, and ortho-xylene.
References Cited (Backward Citations)
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