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Patent US4073726A successfully refreshed from Google Patents.
US4073726A
Expired / Lapsed
US
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Removal of trinitrotoluene from aqueous media
Assignee: New York University
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Filing: 1976-10-18
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Granted: 1978-02-14
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Expires: 1996-10-18
Abstract
Abstract There is provided a process for removing trinitrotoluene from waste water resulting from the manufacture of trinitrotoluene, the process comprising forming an admixture of the waste water and an amino group containing compound of the formula (CnH2n+1)m(NH(CH2)x)yNHz, wherein n is 1 to 25, m is 1 to 3, x is 1 to 5, y is 0 to 5, z is 0 to 2 or the amine and a cationic compound of the formula (CnH2n+1)4N+X-, wherein n is 1 to 25, and X- is Cl-, Br-, SO4H-; stirring the mixture to form a water insoluble reaction product of trinitrotoluene, and recovering the reaction product from the substantially trinitrotoluene free waste water.
Inventors
- 👤 Yoshiyuki Okamoto
- 👤 Joseph Y. Wang
- 👤 Eng J. Chou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:11
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5272; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
129 words
A process for the treatment of waste water from the manufacture of trinitrotoluene, said process comprising: a. forming an admixture of (i) waste water comprising an aqueous solution of trinitrotoluene and (ii) an amino group containing compound of the formula (C.sub.n H.sub.2n+1).sub.m (NH(CH.sub.2).sub.x).sub.y NH.sub.z wherein n is 1 to 25, m is 1 to 3, x is 1 to 5, y is 0 to 5, z is 0 to 2, alone or with a cationic compound of the formula (C.sub.n H.sub.2n+1).sub.4 N.sup.+ X.sup.- wherein n is 1 to 25, and X - is Cl - , Br - , SO 4 H - ; b. stirring the mixture to form a water insoluble reaction product of trinitrotoluene, and c. recovering the water insoluble reaction product from the waste water.
Claim 2
Dependent Claim
129 words
A process for the treatment of waste water from the manufacture of trinitrotoluene, said process comprising: a. forming an admixture of (i) waste water comprising an aqueous solution of trinitrotoluene and (ii) an amino group containing compound of the formula (C.sub.n H.sub.2n+1).sub.m (NH(CH.sub.2).sub.x).sub.y NH.sub.z wherein n is 1 to 25, m is 1 to 3, x is 1 to 5, y is 0 to 5, z is 0 to 2, alone or with a cationic compound of the formula (C.sub.n H.sub.2n+1).sub.4 N.sup.+ X.sup.- wherein n is 1 to 25, and X - is Cl - , Br - , SO 4 H - ; b. stirring the mixture to form a water insoluble reaction product of trinitrotoluene, and c. recovering the water insoluble reaction product from the waste water.
Claim 3
Dependent Claim
12 words
A process as defined in claim 1 where said trinitrotoluene is 2,4,6-trinitrotoluene.
Claim 4
Dependent Claim
19 words
A process as defined in claim 1 wherein said waste water, before treatment, includes colored decomposition products of trinitrotoluene.
Claim 5
Dependent Claim
30 words
A process as defined in claim 1 wherein the amino group containing compound is selected from the group consisting of 1-dodecyldiethylenetriamine, 4-dodecyldiethylenetriamine, N-oleyl- 1,3-diaminopropane, N-tall oil fatty-1,3-diaminopropane, N-Coco-1,3-diaminopropane and N-tallow-1,3-diaminopropane.
Claim 6
Dependent Claim
45 words
A process as defined in claim 1 wherein the amino group containing compound is selected from the group consisting of n-butylamine, n-propylamine, ethylene diamine, diethylamine, diethylenetriamine, alkylaminobispropylamine and the cationic compound is selected from the group consisting of dodecyltrimethyl ammonium salt and hexadecyltrimethyl ammonium salt.
Claim 7
Dependent Claim
30 words
A process as defined in claim 1 wherein in step (a), the molar ratio of said amino group containing compound of trinitrotoluene is in the range from 1:1 to 5:1.
Claim 8
Dependent Claim
31 words
A process as defined in claim 1 wherein the cationic compound is used in amounts which provide an initial molar ratio of this compound to trinitrotoluene of from 0.5:1 to 2:1.
Claim 9
Dependent Claim
23 words
A process as defined in claim 1 wherein the concentration of trinitrotoluene in said waste water after treatment, is 1 ppm or less.
Claim 10
Dependent Claim
14 words
A process as defined in claim 1 which is carried out at ambient temperature.
Claim 11
Dependent Claim
15 words
A process as defined in claim 1 which is carried out at an elevated temperature.
Claim 12
Dependent Claim
86 words
A process for the treatment of waste water from the manufacture of said compound, said process comprising: a. forming an admixture of 4-dodecyldiethylenetriamine and waste water comprising an aqueous solution of trinitrotoluene, said admixture having a molar ratio of 4-dodecyldiethylenediamine to trinitrotoluene of about 2:1; b. stirring the mixture at ambient temperature for a period of from 24 to 48 hours, to form a water insoluble reaction product of substantially all of said trinitrotoluene, and c. recovering the water insoluble reaction product from said waste water.
Claim 13
Dependent Claim
86 words
A process for the treatment of waste water from the manufacture of said compound, said process comprising: a. forming an admixture of 4-dodecyldiethylenetriamine and waste water comprising an aqueous solution of trinitrotoluene, said admixture having a molar ratio of 4-dodecyldiethylenediamine to trinitrotoluene of about 2:1; b. stirring the mixture at ambient temperature for a period of from 24 to 48 hours, to form a water insoluble reaction product of substantially all of said trinitrotoluene, and c. recovering the water insoluble reaction product from said waste water.
Claim 14
Dependent Claim
91 words
A process for the removal of trinitrotoluene from waste water from the manufacture of said compound, said process comprising: a. forming an admixture of N-tallow-1,3-diaminepropane and waste waters comprising an aqueous solution of trinitrotoluene, said admixture having a molar ratio of N-tallow-1,3-diaminepropane to trinitrotoluene of about 2:1; b. stirring the mixture at an elevated temperature of about 80° C. for a period of about 8 hours to form a water insoluble reaction product of substantially all of said trinitrotoluene, and c. recovering the water insoluble reaction product from said waste water.
Claim 15
Dependent Claim
91 words
A process for the removal of trinitrotoluene from waste water from the manufacture of said compound, said process comprising: a. forming an admixture of N-tallow-1,3-diaminepropane and waste waters comprising an aqueous solution of trinitrotoluene, said admixture having a molar ratio of N-tallow-1,3-diaminepropane to trinitrotoluene of about 2:1; b. stirring the mixture at an elevated temperature of about 80° C. for a period of about 8 hours to form a water insoluble reaction product of substantially all of said trinitrotoluene, and c. recovering the water insoluble reaction product from said waste water.
References Cited (Backward Citations)
US4003977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |