US3907652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrooxidation of phosphonomethyl amines
Assignee: Monsanto Co
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Filing: 1974-10-30
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Granted: 1975-09-23
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Expires: 1994-10-30
Abstract
Abstract Phosphonomethylamines are oxidized by electrolysis at the anode to remove a phosphonomethyl group. The process can prepare secondary amines from tertiary amines. The products are useful as anti-precipitants, sequestering agents and the like.
Inventors
- 👤 John H Wagenknecht
- 👤 Kurt Moedritzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:03
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/3817; C25; C25B; C25B3/00; C25B3/01; C25B3/07; C25B3/09; C25B3/20; C25B3/23
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
35 words
THE PROCESS OF REMOVING A PHOSPHONOMETHYL GROUP FROM AN N-PHOSPHONOMETHYLAMINE WHICH COMPRISES SUBJECTING AN ELECTROLYSIS MEDIUM CONTAINING SUCH N-PHOSPHONOMETHYLAMINE TO AN ELECTROMOTIVE FORCE WHEREBY THE N-PHOSPHONOMETHYLAMINE IS OXIDIZED AND AN N-PHOSPHONOMETHYL GROUP THEREOF IS REMOVED.
Claim 2
Dependent Claim
35 words
THE PROCESS OF REMOVING A PHOSPHONOMETHYL GROUP FROM AN N-PHOSPHONOMETHYLAMINE WHICH COMPRISES SUBJECTING AN ELECTROLYSIS MEDIUM CONTAINING SUCH N-PHOSPHONOMETHYLAMINE TO AN ELECTROMOTIVE FORCE WHEREBY THE N-PHOSPHONOMETHYLAMINE IS OXIDIZED AND AN N-PHOSPHONOMETHYL GROUP THEREOF IS REMOVED.
Claim 3
Dependent Claim
13 words
The process of claim 1 in which a tertiary N-phosphonomethylamine group is oxidized.
Claim 4
Dependent Claim
18 words
The process of claim 2 in which the tertiary amine group is oxidized to a secondary amine group.
Claim 5
Dependent Claim
25 words
The process of claim 1 which involves electrolysis in an aqueous acidic medium in contact with an anode at a potential sufficient to cause oxidation.
Claim 6
Dependent Claim
36 words
The process of claim 4 in which the concentration of the N-phosphonomethylamine is about 5 to 30 percent by weight of the electrolysis medium and the acid concentration is about 10 to 37 percent by weight.
Claim 7
Dependent Claim
24 words
The process of claim 5 in which the acid is hydrochloric acid and a tertiary amine group is converted to a secondary amine group.
Claim 8
Dependent Claim
37 words
The process of claim 1 in which the N-phosphonomethylamine is of the formula: (A)2N-G in which A is a phosphonomethyl group and G is selected from A, alkyl, aralkyl, cycloalkyl and - ((CH2)n-(B)m-)P(CH2)n-N(A)2 in which B is
Claim 9
Dependent Claim
13 words
The process of claim in which an N,N,N-triphosphonomethylamine is converted to an N,N-diphosphonomethylamine.
Claim 10
Dependent Claim
16 words
The process of claim 1 in which an alkyl N,N-diphosphonometheylaminee is converted to an alkyl N-phosphonomethylamine.
Claim 11
Dependent Claim
17 words
The process of claim 1 in which an alkylene bis-(iminodimethylenediphosphonic acid) is converted to an alkylene-bis(iminomethylenephosphonic acid).
Claim 12
Dependent Claim
14 words
The process of claim 1 in which nitrilotrimethylene-triphosphonic acid is converted to iminodimethylenediphosphonic acid.
References Cited (Backward Citations)
US3137705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |