US4376757A
Expired / Lapsed
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Synthetic crystalline silicate compositions and preparation thereof
Assignee: Equistar Chemicals LP
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Filing: 1981-04-22
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Granted: 1983-03-15
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Expires: 2001-04-22
Abstract
Abstract New crystalline silicate compositions are prepared from a silica containing mixture which is substantially free of aluminum ions and contains a source of choline by digesting a reaction mixture comprising a choline salt, sodium hydroxide, potassium hydroxide, an oxide of silicon, water and, optionally, a Group VIII metal salt with the reaction mixture containing less than about 1000 ppm aluminum. These crystalline silicates exhibit a distinctive X-ray diffraction pattern and have a composition as expressed in terms of its oxides, as follows: <IMAGE> where R is the organic nitrogen-containing cation derived from choline, M is an alkali metal ion, ammonium, hydrogen, a metal cation or mixtures thereof, m is the valence of M, Z is a Group VIII metal cation and z is the valence of said Group VIII metal cation. These crystalline silicates are usefully employed as catalysts in hydrocarbon conversions.
Inventors
- 👤 James A. Hinnenkamp
- 👤 Vernon V. Walatka, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:56
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/03; B01J29/035
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
A crystalline silicate composition which is substantially free of aluminum having a composition in terms of mole ratios of oxides as follows: ##EQU4## where R is the organic nitrogen-containing cation derived from choline, M is an alkali metal cation, ammonium, hydrogen, a metal cation or mixtures thereof, m is the valence of M,Z is a Group VIII metal cation and z is the valence of said Group VIII metal cation, the composition being characterized by the X-ray diffraction pattern set forth in Table I of the specification.
Claim 2
Dependent Claim
87 words
A crystalline silicate composition which is substantially free of aluminum having a composition in terms of mole ratios of oxides as follows: ##EQU4## where R is the organic nitrogen-containing cation derived from choline, M is an alkali metal cation, ammonium, hydrogen, a metal cation or mixtures thereof, m is the valence of M,Z is a Group VIII metal cation and z is the valence of said Group VIII metal cation, the composition being characterized by the X-ray diffraction pattern set forth in Table I of the specification.
Claim 3
Dependent Claim
14 words
A crystalline silicate composition according to claim 1 wherein Z is ruthenium or iron.
Claim 4
Dependent Claim
28 words
A crystalline silicate composition according to claim 1 which has undergone ion exchange with ammonium, hydrogen, rare earth metal, a Group VI metal or a Group VIII metal.
Claim 5
Dependent Claim
16 words
A crystalline silicate composition according to claim 3 wherein the replacing cation is ammonium or hydrogen.
Claim 6
Dependent Claim
24 words
A crystalline silicate composition resulting from heat treating the composition of claim 1 at a temperature of from about 200° to about 900° C.
Claim 7
Dependent Claim
116 words
A method of preparing a crystalline silicate composition according to claim 1 which comprises: preparing a mixture containing a choline salt, sodium hydroxide, potassium hydroxide, silica and water, said mixture having an aluminum content of less than about 1000 wppm (based on silica) and having a composition in terms of mole ratios of oxides, falling within the following ranges: ______________________________________
OH.sup.- /SiO.sub.2 0.05-3
H.sub.2 O/OH.sup.- 10-800
K.sub.2 O/M.sub.2 O 0.01-1
R.sup.+ /(R.sup.+ + M.sup.+)
0.01-1
______________________________________ where R + is choline cation and M+ is sodium ion plus potassium ion, maintaining the mixture at a temperature of about 50° to about 250° C., until crystals of said silicate are formed and separating and recovering said crystals.
Claim 8
Dependent Claim
31 words
A method according to claim 6 wherein the mixture additionally contains a Group VIII metal salt and the composition has an additional mole ratio range of Z 2/z O/SiO 2 0-0.3
Claim 9
Dependent Claim
15 words
A method according to claim 7 wherein the Group VIII metal is ruthenium or iron.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |