US4795833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a mixture of methyl-substituted primary anilines
Assignee: EIDP Inc
•
Filing: 1987-02-04
•
Granted: 1989-01-03
•
Expires: 2007-02-04
Abstract
Abstract A process is disclosed for preparing an isomeric mixture of methyl-substituted aniline comprising contacting at least one of said analines with a specified zeolite catalyst.
Inventors
- 👤 Richard S. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:02
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
161 words
A process for preparing an isomeric mixture of methyl-substituted anilines having the formula: ##STR3## wherein n is 2 or 3, said process comprising (A) contacting at least one compound of the formula ##STR4## with an acidic zeolite catalyst at a temperature of from about 240° C. to about 550° C. and at a pressure of from about 10 kPa to about 10 MPa, said zeolite catalyst being selected from the group consisting of zeolites omega, beta, L and mixtures thereof, or (B) contacting at least one compound of the formula ##STR5## with an acidic zeolite catalyst at a temperature of from about 240° C. to about 550° C. and at a pressure of from about 10 kPa to about 10 MPa, said zeolite catalyst being selected from the group consisting of zeolites omega, beta, L and mixtures thereof, and isolating from said isomeric mixture a portion of said mixture which comprises at least one compound of formula IIa, IIb or IIc.
Claim 2
Dependent Claim
161 words
A process for preparing an isomeric mixture of methyl-substituted anilines having the formula: ##STR3## wherein n is 2 or 3, said process comprising (A) contacting at least one compound of the formula ##STR4## with an acidic zeolite catalyst at a temperature of from about 240° C. to about 550° C. and at a pressure of from about 10 kPa to about 10 MPa, said zeolite catalyst being selected from the group consisting of zeolites omega, beta, L and mixtures thereof, or (B) contacting at least one compound of the formula ##STR5## with an acidic zeolite catalyst at a temperature of from about 240° C. to about 550° C. and at a pressure of from about 10 kPa to about 10 MPa, said zeolite catalyst being selected from the group consisting of zeolites omega, beta, L and mixtures thereof, and isolating from said isomeric mixture a portion of said mixture which comprises at least one compound of formula IIa, IIb or IIc.
Claim 3
Dependent Claim
14 words
A process according to claim 1, wherein the acidic zeolite catalyst is zeolite omega.
Claim 4
Dependent Claim
17 words
A process according to claim 2, wherein the acidic zeolite omega is the hydrogen or aluminum form.
Claim 5
Dependent Claim
18 words
A process according to claim 3, wherein the temperature is from about 280° C. to about 425° C.
Claim 6
Dependent Claim
18 words
A process according to claim 4, wherein the pressure is from about 100 kPa to about 1 MPa.
Claim 7
Dependent Claim
19 words
A process according to claim 5, wherein the reaction time is from about 0.1 second to about 10 hours.
Claim 8
Dependent Claim
14 words
A process according to claim 1, wherein the acidic zeolite catalyst is zeolite beta.
Claim 9
Dependent Claim
17 words
A process according to claim 7, wherein the acidic zeolite beta is the hydrogen or aluminum form.
Claim 10
Dependent Claim
18 words
A process according to claim 8, wherein the temperature is from about 280° C. to about 425° C.
Claim 11
Dependent Claim
18 words
A process according to claim 9, wherein the pressure is from about 100 kPa to about 1 MPa.
Claim 12
Dependent Claim
19 words
A process according to claim 10, wherein the reaction time is from about 0.1 second to about 10 hours.
Claim 13
Dependent Claim
14 words
A process according to claim 1, wherein the acidic zeolite catalyst is zeolite L.
Claim 14
Dependent Claim
17 words
A process according to claim 12, wherein the acidic zeolite L is the hydrogen or aluminum form.
Claim 15
Dependent Claim
18 words
A process according to claim 13, wherein the temperature is from about 280° C. to about 425° C.
Claim 16
Dependent Claim
18 words
A process according to claim 14, wherein the pressure is from about 100 kPa to about 1 MPa.
Claim 17
Dependent Claim
19 words
A process according to claim 15, wherein the reaction time is from about 0.1 second to about 10 hours.
References Cited (Backward Citations)
JPS4929178B1
Cited
US3931298A
Cited
US3868420A
Cited
US3960962A
Cited
US4188341A
Cited
JPS5328128A
Cited
JPS5328129A
Cited
US4317931A
Cited
US4480128A
Cited
US4554380A
Cited
US4593113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |