Patent US5301096A successfully refreshed from Google Patents.
US4458092A
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US
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Highly active catalysts for methanol amination
Assignee: Air Products and Chemicals Inc
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Filing: 1982-01-29
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Granted: 1984-07-03
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Expires: 2002-01-29
Abstract
Abstract A process for improving the methanol conversion rate in the reaction of methanol and ammonia to produce methylamines which comprises effecting the reaction in the presence of a highly acidic dehydrated aluminosilicate catalyst manifesting microporous diffusivity for the methylamines. Rare earth Y zeolite and hydrogen exchanged Y zeolite are the preferred catalysts.
Inventors
- 👤 Michel Deeba
- 👤 Robert N. Cochran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:59
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
In a process for producing methylamines from the reaction of methanol with ammonia in the presence of a catalyst, the method for improving methanol conversion rates which comprises reacting the methanol and ammonia under conversion conditions in the presence of a highly acidic, dehydrated aluminosilicate catalyst which irreversibly adsorbs at least 0.5 millimoles of ammonia per gram of catalyst at about 200° C., has a silicon to aluminum ratio of at least about 2.0, and has three dimensional intracrystalline pore channels of at least about 7 Angstroms.
Claim 2
Dependent Claim
87 words
In a process for producing methylamines from the reaction of methanol with ammonia in the presence of a catalyst, the method for improving methanol conversion rates which comprises reacting the methanol and ammonia under conversion conditions in the presence of a highly acidic, dehydrated aluminosilicate catalyst which irreversibly adsorbs at least 0.5 millimoles of ammonia per gram of catalyst at about 200° C., has a silicon to aluminum ratio of at least about 2.0, and has three dimensional intracrystalline pore channels of at least about 7 Angstroms.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the methanol and ammonia are reacted at a temperature from about 450°-800° F. and a pressure from 1-50 atmospheres.
Claim 4
Dependent Claim
27 words
The method of claim 2 wherein the highly acidic, dehydrated aluminosilicate catalyst irreversibly adsorbs at least 0.8 mmoles ammonia per gram of catalyst at about 200° C.
Claim 5
Independent Claim
15 words
The method of claims 1 or 2 wherein the catalyst is rare earth Y zeolite.
Claim 6
Independent Claim
15 words
The method of claims 1 or 2 wherein the catalyst is hydrogen exchanged Y zeolite.
Claim 7
Dependent Claim
107 words
In a process for producing methylamines from the reaction of methanol with ammonia in the presence of a catalyst, the method which comprises reacting the methanol and ammonia in the presence of a dehydrated crystalline aluminosilicate which irreversibly adsorbs at least 0.8 millimoles of ammonia per gram of catalyst at about 200° C., has a Si:Al ratio of at least about 2.5 and has three dimensional intracrystalline pores of at least about 7-8 Angstroms, at a temperature from about 550°-750° F., a pressure from 1-50 atmospheres, a gas hourly space velocity of 1,000-30,000 ml methanol/cc catalyst/hour and an ammonia:methanol molar feed ratio of about 1:1 to 5:1.
Claim 8
Dependent Claim
107 words
In a process for producing methylamines from the reaction of methanol with ammonia in the presence of a catalyst, the method which comprises reacting the methanol and ammonia in the presence of a dehydrated crystalline aluminosilicate which irreversibly adsorbs at least 0.8 millimoles of ammonia per gram of catalyst at about 200° C., has a Si:Al ratio of at least about 2.5 and has three dimensional intracrystalline pores of at least about 7-8 Angstroms, at a temperature from about 550°-750° F., a pressure from 1-50 atmospheres, a gas hourly space velocity of 1,000-30,000 ml methanol/cc catalyst/hour and an ammonia:methanol molar feed ratio of about 1:1 to 5:1.
Claim 9
Dependent Claim
13 words
The invention of claim 6 wherein the catalyst is rare earth Y zeolite.
Claim 10
Dependent Claim
13 words
The method of claim 6 wherein the catalyst is hydrogen exchanged Y zeolite.
Claim 11
Dependent Claim
10 words
The method of claim 1 wherein a methylamine is recovered.
References Cited (Backward Citations)
US2113241A
Cited
US3384667A
Cited
US4082805A
Cited
US4217240A
Cited
US4229374A
Cited
US4191709A
Cited
US4205012A
Cited
US4254061A
Cited
US4370503A
Cited
US4374273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |