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US4742168A
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Anti-caking agent for triethylenediamine
Assignee: Huntsman Corp
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Filing: 1986-07-31
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Granted: 1988-05-03
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Expires: 2006-07-31
Abstract
Abstract The use of certain oxyalkyl amines as anti-caking agents for triethylenediamine (TEDA) is disclosed. The anti-caking agent comprises polyoxypropylene amines or their amides, the amines having the formula: ##STR1## wherein X is hydrogen, a methyl radical or an ethyl radical, Z is a hydrocarbon radical having from 2 to 5 carbon atoms forming from 2 to 4 external ether linkages; n is a number from 1 to about 40 and r is a number from 2 to 4.
Inventors
- 👤 Robert L. Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:43
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
A method for improving the anti-caking properties of triethylenediamine which comprises admixing with the triethylenediamine an effective amount of an additive comprising oxyalkylene amines and their amides, the amines comprising compounds of the formula: ##STR4## wherein X is a methyl radical, Z is a hydrocarbon radical having from 2 to 5 carbon atoms forming from 2 to 4 external ether linkages; n is a number from 1 to about 40 and r is a number from 2 to 4.
Claim 2
Independent Claim
79 words
A method for improving the anti-caking properties of triethylenediamine which comprises admixing with the triethylenediamine an effective amount of an additive comprising oxyalkylene amines and their amides, the amines comprising compounds of the formula: ##STR4## wherein X is a methyl radical, Z is a hydrocarbon radical having from 2 to 5 carbon atoms forming from 2 to 4 external ether linkages; n is a number from 1 to about 40 and r is a number from 2 to 4.
Claim 3
Dependent Claim
32 words
A method as in claim 1 where X is a methyl radical, n is a number from 2 to 17, Z is a 1,2-propylene radical and r is about 2 or 3.
Claim 4
Dependent Claim
18 words
A method as in claim 1 where the compound comprises a polyoxypropylene diamine of about 230 molecular weight.
Claim 5
Dependent Claim
18 words
A method as in claim 1 where the compound comprises a polyoxypropylene diamine of about 400 molecular weight.
Claim 6
Dependent Claim
18 words
A method as in claim 1 where the compound comprises a polyoxypropylene diamine of about 2000 molecular weight.
Claim 7
Dependent Claim
18 words
A method as in claim 1 where the compound comprises a polyoxypropylene triamine of about 400 molecular weight.
Claim 8
Dependent Claim
72 words
A composition comprising triethylene diamine with an amount of an additive effective for improving the anti-caking properties of the composition, the additive comprising compounds of the formula: ##STR5## wherein X is a methyl radical, Z is a hydrocarbon radical having from 2 to 5 carbon atoms forming from 2 to 4 external ether linkages; n is a number from 1 to about 40 and r is a number from 2 to 4.
Claim 9
Dependent Claim
72 words
A composition comprising triethylene diamine with an amount of an additive effective for improving the anti-caking properties of the composition, the additive comprising compounds of the formula: ##STR5## wherein X is a methyl radical, Z is a hydrocarbon radical having from 2 to 5 carbon atoms forming from 2 to 4 external ether linkages; n is a number from 1 to about 40 and r is a number from 2 to 4.
References Cited (Backward Citations)
US2977364A
Cited
US2937176A
Cited
US2977363A
Cited
US2985658A
Cited
US3166558A
Cited
US4345079A
Cited
US4356020A
Cited
US4559384A
Cited
US4628092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |