Patent DE305433C successfully refreshed from Google Patents.
Patent EP0014546A1 successfully refreshed from Google Patents.
EP0014546A1
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Preparation of nitrogenous zeolites and zeolites so prepared
Assignee: Mobil Oil AS
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Filing: 1980-01-24
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Granted: —
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Expires: 2000-01-24
Abstract
Abstract A process for preparing nitrogenous zeolites (such as ZSM-5) in which the form of the crystals, such as their shape, size, smoothness or discreteness, is determined by including in the forming solution an organic basic nitrogen compound in addition to the organic nitrogenous template. The forming solution conventional for a given zeolite is supplemented by certain amines or quaternary ammonium compounds in order to achieve the desired effect.
Inventors
- 👤 Louis Deane Rollman
- 👤 Ernest William Valyocsik
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 07:45
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/65; B01J29/40; C; C01; C01B; C01B39/00; C01B39/02; C01B39/04; C01B39/36; C01B39/38; C01B39/40; C01B39/44; C01B39/445; Y; Y10; Y10S; Y10S423/00; Y10S423/22; Y10S423/23; Y10S423/29
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
A process for preparing a nitrogenous zeolite having a silica to alumina ratio of at least 12, which comprises crystallizing said zeolite from an aqueous forming solution comprising a source of SiO 2 and a nitrogenous template, characterized by adding to said forming solution a substantially colorless organic basic nitrogen compound different from the template and selected from quaternary ammonium compounds having not more than three methyl, three ethyl or three propyl substituents, and amines, in an amount effective to alter the microscopic texture of the zeolite.
Claim 2
Dependent Claim
87 words
A process for preparing a nitrogenous zeolite having a silica to alumina ratio of at least 12, which comprises crystallizing said zeolite from an aqueous forming solution comprising a source of SiO 2 and a nitrogenous template, characterized by adding to said forming solution a substantially colorless organic basic nitrogen compound different from the template and selected from quaternary ammonium compounds having not more than three methyl, three ethyl or three propyl substituents, and amines, in an amount effective to alter the microscopic texture of the zeolite.
Claim 3
Dependent Claim
42 words
A process according to Claim 1 wherein said organic basic nitrogen compound is an amine having a pK a from 7 to 12, and said amount is from 0.01 mol to 0.50 mol per mol of SiO 2 in the forming solution.
Claim 4
Dependent Claim
48 words
A process according to Claim 1 wherein said organic basic nitrogen compound is a surfactant quaternary ammonium compound having an alkyl group containing from 10 to 20 carbon atoms, and said amount is from 0.01 mol to 0.50 mol per mol of SiO 2 in the forming solution.
Claim 5
Dependent Claim
40 words
A process according to any of claims 1 to 3 wherein said zeolite has a constraint index of 1.0 to 12.0 and a dried crystal density in the hydrogen form of not substantially less than 1.6 grams per cubic centimeter.
Claim 6
Dependent Claim
14 words
A proces according to any preceding claim wherein said zeolite is ZSM-5 or ZSM-35.
Claim 7
Dependent Claim
20 words
A process according to any of claims 1, 3 and 4 wherein said basic nitrogen compound is trimethyldecyl ammonium bromide.
Claim 8
Dependent Claim
21 words
A process according to any of claims 1, 2 and 4 wherein said basic nitrogen compound is cyclohexylamine, n-octylamine or dodecylamine.
Claim 9
Dependent Claim
13 words
Zeolites prepared by the process claimed in any of claims 1 to 7.
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