EP0031255A2
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EP
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Crystalline aluminosilicates, their production and use
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1980-12-19
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Granted: —
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Expires: 2000-12-19
Abstract
Abstract A crystalline aluminosilicate (which may contain ftuorine) has in its X-ray diffraction pattern seven diffraction lines showing the following relative intensities at the positions of the following respective diffraction angles (2θ): Such crystalline aluminosilicates are produced as relatively large crystals by carrying out a hydrothermal synthetic reaction in the presence of a fluorine compound. The crystalline aluminosilicates can be used as an adsorbent for the separation of various compounds, for example. the isomers of hydrocarbons, or can be converted to a solid acid by treatment with an acid such as hydrochloric acid and be used as catalysts for various reactions, for example, the preparation of olefins from methanol or dimethyl ether by the dehydration reaction.
Inventors
- 👤 Takashi Suzuki
- 👤 Shoichiro Hashimoto
- 👤 Rieko Nakano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 02:32
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/36; C01B39/38; C01B39/40; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C07; C07C; C07C1/00; C07C1/20; C07C2529/00; C07C2529/04; C07C2529/06
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
48 words
A crystalline aluminosilicate characterized by having in its X-ray diffraction pattern at least seven diffraction lines showing the following relative intensities at the positions of the following respective diffraction angles (28): taking the intensity of the diffraction line at a diffraction angle of 8.8°±0.3° or 23.2°±0.3° as 100.
Claim 2
Dependent Claim
48 words
A crystalline aluminosilicate characterized by having in its X-ray diffraction pattern at least seven diffraction lines showing the following relative intensities at the positions of the following respective diffraction angles (28): taking the intensity of the diffraction line at a diffraction angle of 8.8°±0.3° or 23.2°±0.3° as 100.
Claim 3
Dependent Claim
13 words
A crystalline aluminosilicate according to claim 1 characterized in that it contains fluorine.
Claim 4
Dependent Claim
55 words
A crystalline aluminosilicate according to claim 1 or 2 characterized in that it has in its X-ray diffraction pattern at least seven diffraction lines showing the following relative intensities at the positions of the following respective diffraction angles (28): taking the intensity of the diffraction line of the diffraction angle 8.8° or 23.2° as 100.
Claim 5
Dependent Claim
31 words
A crystalline aluminosilicate according to any one of the preceding claims characterized in that said X-ray diffraction pattern is obtained by the standard powder diffraction method using Ka radiation of copper.
Claim 6
Dependent Claim
27 words
A crystalline aluminosilicate according to any one of the preceding claims characterized in that the SiO 2 /Al 2 O 3 mole ratio is at least 50.
Claim 7
Dependent Claim
19 words
A crystalline aluminosilicate according to claim 5 characterized in that the Si02/A1203 mole ratio is from 100 to 3000.
Claim 8
Dependent Claim
24 words
A crystalline aluminosilicate according to claim 6 characterized in that the SiO 2 /Al 2 O 3 mole ratio is from 200 to 2000.
Claim 9
Dependent Claim
36 words
A crystalline aluminosilicate according to any one of the preceding claims characterized in that the ratio of the length in the longest direction to the length in the shortest direction of crystals is at least 1.5.
Claim 10
Dependent Claim
61 words
A process for producing a crystalline aluminosilicate as claimed in any one of the preceding claims containing fluorine by submitting a silicon compound and an aluminum compound to a hydrothermal reaction in an aqueous medium in the presence of an organic cation and an alkali, characterized in that said hydrothermal reaction is carried out in the presence of a fluorine compound.
Claim 11
Dependent Claim
25 words
A process according to claim 9 characterized in that said fluorine compound is a compound that dissociates to form fluorine ions when dissolving in water.
Claim 12
Dependent Claim
18 words
A process according to claim 10 characterized in that said fluorine compound is sodium fluoride or ammonium fluoride.
Claim 13
Dependent Claim
21 words
A process according to claim 9 characterized in that said fluorine compound is a compound that forms fluorine ions by hydrolysis.
Claim 14
Dependent Claim
20 words
A process according to claim 12 characterized in that said fluorine compound is silicon fluoride, boron fluoride or sulfur fluoride.
Claim 15
Dependent Claim
27 words
A process according to any one of claims 9 to 13 characterized in that said hydrothermal reaction is effected at a temperature of from 100° to 200°C.
Claim 16
Dependent Claim
34 words
A process according to any one of claims 9 to 14 characterized in that said organic cation is present in such an amount that the organic cation/SiO 2 mole ratio is at least 0.1.
Claim 17
Dependent Claim
34 words
A process according to any one of claims 9 to 15 characterized in that said alkali is present in such an amount that the Na + /Si0 2 mole ratio is at least 0.1.
Claim 18
Dependent Claim
35 words
A process according to any one of claims 9 to 16 characterized in that said fluorine compound is present in such an amount that the F - /SiO 2 mole ratio is at least 0.1.
Claim 19
Dependent Claim
33 words
A process according to any one of claims 9 to 17 characterized in that water is used in such an amount that the H 2 O/SiO 2 mole ratio is at least 10.
Claim 20
Dependent Claim
40 words
A process according to any one of claims 9 to 18 characterized in that the temperature of the reaction system is raised to the desired temperature for practicing the hydrothermal reaction at a rate of at least 1°C per minute.
Claim 21
Dependent Claim
28 words
A process according to any one of claims 9 to 19 characterised in that the fluorine-containing crystalline aluminosilicate is further treated to reveal the acid-sites of the crystals.
Claim 22
Dependent Claim
42 words
Use of a crystalline aluminosilicate as claimed in any one of claims 1 to 8 or which has been produced by a process as claimed in any one of claims 9 to 20 as an adsorbent or as a solid acid catalyst.
References Cited (Backward Citations)
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