US4093580A
Expired / Lapsed
US
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Method for treating aqueous mediums containing magnesium sulfite trihydrate
Assignee: Veolia WTS USA Inc
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Filing: 1976-08-05
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Granted: 1978-06-06
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Expires: 1996-08-05
Abstract
Abstract A method is disclosed for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions comprising adding in combination to the aqueous medium an effective amount for the purpose of an oligomer and a copolymer of a 1-olefin and an unsaturated anhydride.
Inventors
- 👤 Robert L. Jones
- 👤 Lewis Volgenau
- 👤 Philip S. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:56
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/501; C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; Y; Y10; Y10S; Y10S526/00; Y10S526/91; Y10S526/911
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
227 words
A method for dispersing magnesium sulfite tri-hydrate contained in an aqueous medium comprising adding in combination to the medium an effective amount for the purpose as a dispersant of (i) an oligomer having the formula: ##STR5## where R 1 , R 2 , R 3 and R 4 are the same or different and are selected from the group consisting of hydrogen, methyl and ethyl, Y is at least one member selected from the group consisting of --COOH, --COOM, --CONH 2 , --OCH 3 , --OC 2 H 5 , --CH 2 OH, and ##STR6## X is one or more members selected from the group consisting of --COOC 2 H 4 OH, --COOC 3 H 6 OH, --CONHCH 2 OH, --CONHCH 3 , --CONHC 2 H 5 , --CONHC 3 H 7 , --CONHC 8 H 17 , --COOCH 3 , --COOC 2 H 5 , --CN, --OOCCH 3 , --OOCC 2 H 5 , and --CONHC(CH 3 ) 2 --CH 2 COCH 3 , a+b is 4 to 250, a/(a+b) is between 0.0 and 0.6, and M is a water soluble cation of a bisulfite salt; and (ii) an effective metal salt of a copolymer of a 1-olefin having from 4 to 16 carbon atoms and a compound having the formula: ##STR7## where R is individually selected from the group consisting of hydrogen, methyl and ethyl.
Claim 2
Independent Claim
227 words
A method for dispersing magnesium sulfite tri-hydrate contained in an aqueous medium comprising adding in combination to the medium an effective amount for the purpose as a dispersant of (i) an oligomer having the formula: ##STR5## where R 1 , R 2 , R 3 and R 4 are the same or different and are selected from the group consisting of hydrogen, methyl and ethyl, Y is at least one member selected from the group consisting of --COOH, --COOM, --CONH 2 , --OCH 3 , --OC 2 H 5 , --CH 2 OH, and ##STR6## X is one or more members selected from the group consisting of --COOC 2 H 4 OH, --COOC 3 H 6 OH, --CONHCH 2 OH, --CONHCH 3 , --CONHC 2 H 5 , --CONHC 3 H 7 , --CONHC 8 H 17 , --COOCH 3 , --COOC 2 H 5 , --CN, --OOCCH 3 , --OOCC 2 H 5 , and --CONHC(CH 3 ) 2 --CH 2 COCH 3 , a+b is 4 to 250, a/(a+b) is between 0.0 and 0.6, and M is a water soluble cation of a bisulfite salt; and (ii) an effective metal salt of a copolymer of a 1-olefin having from 4 to 16 carbon atoms and a compound having the formula: ##STR7## where R is individually selected from the group consisting of hydrogen, methyl and ethyl.
Claim 3
Dependent Claim
46 words
The method of claim 1, wherein a + b is about 1 to 100, Y is selected from the group consisting of --COOM, --COOH, --CONH 2 , --OCH 3 , --OC 2 H 5 , and --CH 2 OH, and wherein X is the group --CN.
Claim 4
Dependent Claim
9 words
The method of claim 2, wherein Y is --COOM.
Claim 5
Dependent Claim
9 words
The method of claim 3, wherein Y is --COONa.
Claim 6
Dependent Claim
14 words
The method of claim 2, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 7
Dependent Claim
14 words
The method of claim 3, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 8
Dependent Claim
14 words
The method of claim 4, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 9
Dependent Claim
25 words
The method of claim 1, wherein the oligomer is present in the combination in an amount of from about 10% to about 90% by weight.
Claim 10
Dependent Claim
46 words
The method of claim 8, wherein a + b is about 1 to 100, Y is selected from the group consisting of --COOM, --COOH, --CONH 2 , --OCH 3 , --OC 2 H 5 , and --CH 2 OH, and wherein X is the group --CN.
Claim 11
Dependent Claim
9 words
The method of claim 9, wherein Y is --COOM.
Claim 12
Dependent Claim
9 words
The method of claim 10, wherein Y is --COONa.
Claim 13
Dependent Claim
14 words
The method of claim 9, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 14
Dependent Claim
14 words
The method of claim 10, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 15
Dependent Claim
14 words
The method of claim 11, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 16
Dependent Claim
31 words
The method of claim 8, wherein the combination is added to the aqueous medium in an amount of from about 1 to about 1,000 parts per million parts of aqueous medium.
Claim 17
Dependent Claim
31 words
The method of claim 15, wherein the combination is added to the aqueous medium in an amount of from about 5 to about 100 parts per million parts of aqueous medium.
Claim 18
Dependent Claim
21 words
The method of claim 1, wherein the aqueous medium is the scrubber medium for a magnesium oxide based gas scrubber system.
Claim 19
Dependent Claim
46 words
The method of claim 17, wherein a + b is about 10 to 100, Y is selected from the group consisting of --COOM, --COOH, --CONH 2 , --OCH 3 , --OC 2 H 5 , and --CH 2 OH, and wherein X is the group --CN.
Claim 20
Dependent Claim
9 words
The method of claim 18, wherein Y is --COOM.
Claim 21
Dependent Claim
9 words
The method of claim 19, wherein Y is --COONa.
Claim 22
Dependent Claim
14 words
The method of claim 18, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 23
Dependent Claim
14 words
The method of claim 19, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 24
Dependent Claim
14 words
The method of claim 20, wherein the 1-olefin is diisobutylene and R is hydrogen.
Claim 25
Dependent Claim
25 words
The method of claim 17, wherein the oligomer is present in the combination in an amount of from about 10% to about 90% by weight.
Claim 26
Dependent Claim
31 words
The method of claim 17, wherein the combination is added to the aqueous medium in an amount of from about 1 to about 1,000 parts per million parts of aqueous medium.
Claim 27
Dependent Claim
31 words
The method of claim 17, wherein the combination is added to the aqueous medium in an amount of from about 5 to about 100 parts per million parts of aqueous medium.
Claim 28
Dependent Claim
19 words
The method of claim 1, wherein the pH of the aqueous medium is from about 7 to about 9.
Claim 29
Dependent Claim
19 words
The method of claim 17, wherein the pH of the aqueous medium is from about 7 to about 9.
Claim 30
Dependent Claim
19 words
The method of claim 21, wherein the pH of the aqueous medium is from about 7 to about 9.
Claim 31
Dependent Claim
19 words
The method of claim 24, wherein the pH of the aqueous medium is from about 7 to about 9.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |