Patent US3832393A successfully refreshed from Google Patents.
US3832393A
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Process of producing amino alkylene phosphonic acids
Assignee: Joh A Benckiser GmbH
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Filing: 1971-04-16
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Granted: 1974-08-27
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Expires: 1991-04-16
Abstract
Abstract Amino alkylene phosphonic acids such as ethylene diamine tetra(methylene phosphonic acid), diethylene triamine penta-(methylene phosphonic acid), nitrilo tris-(methylene phosphonic acid), and others are obtained in a high yield by reacting alkylene glycol chlorophosphites with an aldehyde or ketone and an amine or an acid addition salt thereof or an acid amide of a lower mono- or dicarboxylic acid, such as formamide, oxamide, or urea. The resulting reaction solution can directly be added to fluid or solid cleaning agents or the substantially pure amino alkylene phosphonic acid can be recovered therefrom.
Inventors
- 👤 F Krueger
- 👤 L Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:36
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
15 words
The process of claim 1, in which the alkylene glycol halogenophosphite is ethylene glycol chlorophosphite.
Claim 2
Dependent Claim
15 words
The process of claim 1, in which the alkylene glycol halogenophosphite is 1,2-propylene glycol chlorophosphite.
Claim 3
Dependent Claim
15 words
The process of claim 1, in which the alkylene glycol halogenophosphite is 1,3-butylene glycol chlorophosphite.
Claim 4
Dependent Claim
15 words
The process of claim 1, in which the carbonyl compound is an aqueous formaldehyde solution.
Claim 5
Dependent Claim
12 words
The process of claim 1, in which the amine is ethylene diamine.
Claim 6
Dependent Claim
12 words
The process of claim 1, in which the amine is diethylene triamine.
Claim 7
Dependent Claim
13 words
The process of claim 1, in which the ammonium salt is ammonium chloride.
Claim 8
Dependent Claim
60 words
The process of claim 1, in which the alkylene glycol chlorophosphite is added drop by drop to a mixture of the acid addition salt of the amine and an aqueous formaldehyde solution, whereupon the temperature of the reaction solution is increased to at least the temperature of the boiling water bath and heating is continued until the reaction is completed.
Claim 9
Dependent Claim
57 words
The process of claim 1, in which the alkylene glycol halogenophosphite is a lower alkylene glycol chlorophosphite, the lower alkylene glycol moiety in said lower alkylene glycol chlorophosphite having two to four carbon atoms, the amino compound is ethylene diamine, and the carbonyl compound is formaldehyde, and in which the reaction yields ethylene diamine tetra-(methylene phosphonic acid).
Claim 10
Dependent Claim
57 words
The process of claim 1, in which the alkylene glycol halogenophosphite is a lower alkylene glycol chlorophosphite, the lower alkylene glycol moiety in said lower alkylene glycol chlorophosphite having two to four carbon atoms, the amino compound is diethylene triamine, and the carbonyl compound is formaldehyde, and in which the reaction yields diethylene triamine penta-(methylene phosphonic acid).
Claim 11
Dependent Claim
56 words
The process of claim 1, in which the alkylene glycol halogenophosphite is a lower alkylene glycol chlorophosphite, the lower alkylene glycol moiety in said lower alkylene glycol chlorophosphite having two to four carbon atoms, the amino compound is ammonium chloride, and the carbonyl compound is formaldehyde, and in which the reaction yields nitrilo tris-(methylene phosphonic acid).
Claim 12
Dependent Claim
103 words
In a process of producing an amino alkylene phosphonic acid which comprises heating in an aqueous medium a phosphorus compound with an aliphatic carbonyl compound selected from the group consisting of an aliphatic aldehyde and an aliphatic ketone, and with a nitrogen-containing compound at a temperature between room temperature and 150*C. until the corresponding amino alkylene phosphonic acid is formed and crystallized from the reaction mixture, and separating the crystallized product from the reaction mixture, the improvement which comprises said phosphorus compound being a cyclic alkylene glycol halogenophosphite and said nitrogen-containing compound being an acid amide of a lower mono- or di-carboxylic acid.
Claim 13
Dependent Claim
12 words
The process of claim 13, in which the acid amide is formamide.
Claim 14
Dependent Claim
48 words
The process of claim 13, in which the aqueous solution of formaldehyde is added to the alkylene glycol chlorophosphite while stirring, whereafter the acid amide is added and the reaction mixture is heated at least to the temperature of the boiling water bath until the reaction is completed.
Claim 15
Dependent Claim
55 words
The process of claim 13, in which the alkylene glycol halogenophosphite is a lower alkylene glycol cHlorophosphite, the lower alkylene glycol moiety in said lower alkylene glycol chlorophosphite having two to four carbon atoms, the amino compound is formamide, and the carbonyl compound is formaldehyde, and in which the reaction yields nitrilo tris-(methylene phosphonic acid).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |