EP0085408A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A process for the preparation of methylamines in the presence of a highly active catalyst for methanol amination
Assignee: Air Products and Chemicals Inc
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Filing: 1983-01-27
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Granted: —
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Expires: 2003-01-27
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 Norman Cochran
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:13
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 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
85 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
24 words
The invention 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
26 words
The invention 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
Dependent Claim
15 words
The invention of Claims 1 or 2 wherein the catalyst is rare earth Y zeolite.
Claim 6
Dependent Claim
15 words
The invention of Claims 1 or 2 wherein the catalyst is hydrogen exchanged Y zeolite.
Claim 7
Dependent Claim
105 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
105 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 invention of Claim 6 wherein the catalyst is hydrogen exchanged Y zeolite.
Claim 11
Dependent Claim
10 words
The invention of Claim 1 wherein a methylamine is recovered.
References Cited (Backward Citations)
US3384667A
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US4082805A
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GB2013660A
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GB2019394A
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GB2045232A
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EP0025693A1
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DE3213162A1
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