Patent US3755161A successfully refreshed from Google Patents.
US3755161A
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Treatment process for removal of metals and treating agent therefor
Assignee: Osaka Soda Co Ltd
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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 21:57
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.
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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) | 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 |