US4374273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of methylamines
Assignee: EIDP Inc
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Filing: 1981-04-28
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Granted: 1983-02-15
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Expires: 2001-04-28
Abstract
Abstract In the catalytic preparation of methylamines from methanol and ammonia using an aluminosilicate catalyst, the mono-, di- and trimethylamine content of the product mixture can be varied from the equilibrium mixture ordinarily produced by using an amorphous aluminosilicate catalyst containing varying amounts of sodium, potassium, lithium, barium or strontium atoms as a result of treating an amorphous aluminosilicate with a corresponding metal hydroxide.
Inventors
- 👤 George E. Heinsohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:16
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02; B01J23/04; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
In the catalytic preparation of methylamines from methanol and ammonia using an aluminosilicate catalyst, a method for controlling the relative yields of monomethyl-, dimethyl- and trimethylamine, which method comprises using a catalyst comprising an amorphous aluminosilicate containing about 0.1-6%, by weight, of sodium, potassium, lithium, barium or strontium atoms as a result of treating an amorphous aluminosilicate with a corresponding metal hydroxide, the greater the added metal content of the catalyst, the greater the amount of monomethylamine produced.
Claim 2
Dependent Claim
78 words
In the catalytic preparation of methylamines from methanol and ammonia using an aluminosilicate catalyst, a method for controlling the relative yields of monomethyl-, dimethyl- and trimethylamine, which method comprises using a catalyst comprising an amorphous aluminosilicate containing about 0.1-6%, by weight, of sodium, potassium, lithium, barium or strontium atoms as a result of treating an amorphous aluminosilicate with a corresponding metal hydroxide, the greater the added metal content of the catalyst, the greater the amount of monomethylamine produced.
Claim 3
Dependent Claim
12 words
The method of claim 1 in which the catalyst contains sodium atoms.
Claim 4
Dependent Claim
16 words
The method of claim 1 in which the aluminosilicate has a silica-alumina ratio of about 87/13.
References Cited (Backward Citations)
US3384667A
Cited
US4082805A
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GB2013660A
Cited
US4191709A
Cited
US4205012A
Cited
US4254061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |