US4140726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zeolite catalyst and alkylation process
Assignee: Monsanto Co
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Filing: 1978-04-07
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Granted: 1979-02-20
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Expires: 1998-04-07
Abstract
Abstract An improved alkylation catalyst is provided exemplified by a type X or Y zeolite with cesium, rubidium or potassium cations, and with a boron or phosphorous component added. The catalyst is useful in producing styrene from toluene and methanol.
Inventors
- 👤 Mark L. Unland
- 👤 George E. Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:14
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/862; C07C2/864; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/08; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
A process of producing styrene and ethylbenzene which comprises reacting foluene and an agent selected from methanol and formaldehyde and mixtures thereof at elevated reaction temperature in contact with a catalyst comprising a crystalline aluminosilicate zeolite of the faujasite structure with SiO 2 /Al 2 O 3 mole ratio in the range of about 2 to about 8 and including potassium, rubidium or cesium cations or combinations thereof, and containing boron or phosphorus or combinations thereof.
Claim 2
Dependent Claim
76 words
A process of producing styrene and ethylbenzene which comprises reacting foluene and an agent selected from methanol and formaldehyde and mixtures thereof at elevated reaction temperature in contact with a catalyst comprising a crystalline aluminosilicate zeolite of the faujasite structure with SiO 2 /Al 2 O 3 mole ratio in the range of about 2 to about 8 and including potassium, rubidium or cesium cations or combinations thereof, and containing boron or phosphorus or combinations thereof.
Claim 3
Dependent Claim
13 words
The process of claim 1 in which the catalyst zeolite includes cesium cation.
Claim 4
Dependent Claim
11 words
The process of claim 1 in which the catalyst contains boron.
Claim 5
Dependent Claim
42 words
The process of claim 1 in which the reaction is conducted at temperatures in the range of 350° C. to 500° C. and gaseous hourly space velocity of 500 to 1500 hr -1 and an excess of toluene over methanol or formaldehyde.
Claim 6
Dependent Claim
42 words
The process of claim 4 in which the toluene and methanol are supplied in a mole ratio in the range of about 2 to 10 moles toluene per mole methanol, and the catalyst employed contains boron and its zeolite includes cesium cation.
Claim 7
Dependent Claim
12 words
The process of claim 1 in which toluene is reacted with methanol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |