US3755161A
Expired / Lapsed
US
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Treatment process for removal of metals and treating agent therefor
Assignee: Osaka Soda Co Ltd
•
Filing: 1971-01-05
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Granted: 1973-08-28
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Expires: 1991-01-05
Abstract
Abstract RADICAL IN ITS MOLECULE AND ALSO HAVE A MEMBER OR MEMBERS SELECTED FROM THE GROUP CONSISTING OF THE -N , -S-, -NH-, -N N-, and -NH-NH- radicals in the same molecule; and (c) an organic compound capable of forming a chelate compound of a metal, which compound has the -OH radical in its molecule and also a member or members selected from the group consisting of the -N and -NH2 radicals in the same molecule. A treament process for removing metals from a gaseous phase or liquid phase metal-containing material using a solid treating agent consisting of a carrier material and a compound deposited thereon, such compound being selected from (a) an organic compound capable of forming a mercaptide compound of a metal, which compound has the -SH radical or an alkali salt thereof in its molecule and may also have a member or members selected from the group consisting of the -N , -S-, -NH-, -N N-and -NH-NHradicals in the same molecule; (b) an organic compound capable of forming a mercaptide compound of a metal, which compound has the
Inventors
- 👤 N Yokota
- 👤 H Takatomi
- 👤 S Tokuda
- 👤 Y Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:39
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/32; B01J20/3231; B01J20/3242; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/64; B01J20/02; B01J20/10; B01J20/103; B01J20/16; B01J20/165; B01J20/20; B01J20/28; B01J20/28002; B01J20/28004; B01J20/3092; B01J20/3202; B01J20/3204; B01J20/3244; B01J20/3246; B01J20/3248; B01J20/3251; B01J20/3253; B01J20/3255; C; C02; C02F; C02F1/00; C02F1/28; C02F1/285; C02F1/288; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; C22B3/42; C22B9/00; B01J2220/00; B01J2220/50; B01J2220/58; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/911; Y10S210/912; Y10S210/913; Y10S210/914
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
4 words
thioureas of the formula
Claim 2
Dependent Claim
5 words
thiazole compounds of the formula
Claim 3
Dependent Claim
34 words
The process according to claim 1 wherein said carrier material is selected from the group consisting of carbon, silica gel, silica-alumina gel containing at least 50 percent by weight of silica gel, and zeolite.
Claim 4
Dependent Claim
4 words
thioureas of the formula
Claim 5
Dependent Claim
5 words
thiazole compounds of the formula
Claim 6
Dependent Claim
50 words
The process of claim 1 wherein said metal-containing material from which the metal is to be removed by treatment is one containing a metal or metals selected from the group consisting of Hg, Au, Bi, Cd, Co, Cr, Cu, Ni, Pb, Zn, Ag, Mn, Fe, Mo, Ti, Mg and Al.
Claim 7
Dependent Claim
2 words
2-Mercaptobenzimidazole; and
Claim 8
Dependent Claim
5 words
di-alkyldithiocarbamic acids of the formula
Claim 9
Dependent Claim
2 words
2-Mercaptobenzimidazole; and
Claim 10
Dependent Claim
5 words
di-alkyldithIocarbamic acids of the formula
Claim 11
Dependent Claim
23 words
2-Mercaptoimidazoline; and c. an organic compound capable of forming a chelate compound of a metal selected from anthranylic acid, oxine and 2-methyl oxine.
Claim 12
Dependent Claim
34 words
xanthates of the formula R-O-C-S-M wherein R is butyl or isopropyl and M is hydrogen or an alkali metal; b. an organic compound capable of forming a mercaptide compound of a metal selected from
Claim 13
Dependent Claim
63 words
A treatment process for removing metals which comprises contacting a liquid phase metal-containing material from which the metal is to be removed, with a solid treating agent consisting of a carrier material and a compound deposited thereon by adsorption, said compound being selected from the group consisting of a. an organic compound capable of forming a mercaptide compound of a metal selected from
Claim 14
Dependent Claim
23 words
1-Mercaptoimidazoline; and (c) an organic compound capable of forming a chelate compound of a metal selected from anthranylic acid, oxine and 2-methyl oxine.
Claim 15
Dependent Claim
34 words
xanthates of the formula R-O-C-S-M wherein R is butyl or isopropyl and M is hydrogen or an alkali metal; b. an organic compound capable of forming a mercaptide compound of a metal selected from:
Claim 16
Dependent Claim
27 words
The process of claim 4 wherein said metal-containing material from which the metal is to be removed by treatment has been pre-treated with an anion exchange resin.
Claim 17
Dependent Claim
34 words
The process according to claim 4 wherein said carrier material is selected from the group consisting of carbon, silica gel, silica-alumina gel containing at least 50 percent by weight of silica gel, and zeolite.
Claim 18
Dependent Claim
50 words
The process of claim 4 wherein said metal-containing material from which the metal is to be removed by treatment is one containing a metal or metals selected from the group consisting of Hg, Au, Bi, Cd, Co, Cr, Cu, Ni, Pb, Zn, Ag, Mn, Fe, Mo, Ti, Mg and Al.
References Cited (Backward Citations)
US2645621A
Cited
US2954276A
Cited
US3408291A
Cited
US3196107A
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US3111503A
Cited
US3284351A
Cited
US3310530A
Cited
US3420709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |