US3882018A
Expired / Lapsed
US
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Process for recovery of minerals from acidic streams
Assignee: Aerojet Rocketdyne Inc
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Filing: 1973-01-15
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Granted: 1975-05-06
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Expires: 1993-01-15
Abstract
Abstract This patent describes a method for the removal of the soluble group Ib, IIb, III, IV, V, VI, VII and VIII water soluble metallic ions from acidic streams such as acid mine drainage, pickling waste, electroplating waste wherein the waste stream contains these metal salts as pollutants which comprises: contacting said stream with a cation exchange bed containing a strong, moderately strong of weakly acidic cation exchange resin in its alkali or alkaline earth substituted form to deposit metal ions from said salts thereon, regenerating said cation exchange resin with a solution of an alkali or alkaline earth chelate and precipitating the metals by treatment with an alkali or alkaline earth base.
Inventors
- 👤 David O Depree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:58
CPC Classifications
C; C02; C02F; C02F9/00; B; B01; B01J; B01J39/00; B01J39/04; B01J39/05; B01J49/00; B01J49/50; B01J49/53; C02F1/00; C02F1/42; C02F1/66; C22; C22B; C22B3/00; C22B3/20; C22B3/42; C02F2001/425; C02F2101/00; C02F2101/10; C02F2101/20; C02F2103/00; C02F2103/10; C02F2103/16; C02F2303/00; C02F2303/16; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
82 words
A METHOD FOR THE REMOVAL OF WATER SOLUBLE GROUP 1B, 11B, VB, V1B, V11B, V111B METALLIC IONS FROM HIGHLY ACIDIC WATER SOLUTIONS CONTAINING SAID IONS WHICH COMPRISES INITALLY CONTACTING THE SOLUTION WITH A CATION EXCHANGE RESIN, WHICH RESIN IS PRESENT AS THE ALKALI OR ALKALINE EARTH FROM THEREOF, DEPOSITING THE WATER SOLUBLE METALLIC IONS ON SAID RESIN, PROVIDING A NEUTRAL EFFLUENT, AND REGENERATING THE CATION EXCHANGE RESIN BY CONTACTING SAME WITH A REGENERATING SOLVENT SOLUTION OF AN ALKALI OR ALKALINE EARTH CHELATE.
Claim 2
Independent Claim
82 words
A METHOD FOR THE REMOVAL OF WATER SOLUBLE GROUP 1B, 11B, VB, V1B, V11B, V111B METALLIC IONS FROM HIGHLY ACIDIC WATER SOLUTIONS CONTAINING SAID IONS WHICH COMPRISES INITALLY CONTACTING THE SOLUTION WITH A CATION EXCHANGE RESIN, WHICH RESIN IS PRESENT AS THE ALKALI OR ALKALINE EARTH FROM THEREOF, DEPOSITING THE WATER SOLUBLE METALLIC IONS ON SAID RESIN, PROVIDING A NEUTRAL EFFLUENT, AND REGENERATING THE CATION EXCHANGE RESIN BY CONTACTING SAME WITH A REGENERATING SOLVENT SOLUTION OF AN ALKALI OR ALKALINE EARTH CHELATE.
Claim 3
Dependent Claim
29 words
The process of claim 1 including the additional step of precipitating said metallic ions from the regenerating solvent solution by the addition of an alkali or alkaline earth base.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein at least two metallic ions are removed by contact with the cation exchange resin.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein the chelate employed is a B-dionate.
Claim 6
Dependent Claim
18 words
The process of claim 4 wherein the solvent employed is a compound having at least one hydroxyl group.
Claim 7
Dependent Claim
41 words
The process of claim 2 wherein the initial contact and the regeneration steps are carried out in one of the following types of cation exchange beds, fixed, fluidized concurrent, and fluidized countercurrent, a different bed mode being utilized for each step.
Claim 8
Dependent Claim
18 words
The method claim 1 wherein the regeneration step is carried out in an alcoholic solution of the chelate.
Claim 9
Dependent Claim
11 words
The method of claim 7 wherein the alcoholic solution contains methanol.
Claim 10
Dependent Claim
11 words
The method of claim 1 wherein the chelate is a betadionate.
Claim 11
Dependent Claim
18 words
The method of claim 9 wherein the betadionate is selected from the group consisting of acetylacetone and 2-acetylcyclohexanone.
Claim 12
Dependent Claim
23 words
The process of claim 1 wherein the chelate is selected from the group consisting of organic phosphates, organic phosphites and esters of B-dicarboxylates.
Claim 13
Dependent Claim
27 words
The process of claim 1 wherein the contacting consists of passing the solution of the metallic ions through a cation exchange bed which is a fixed bed.
Claim 14
Dependent Claim
14 words
The process of claim 12 wherein the cation exchange bed is a fluidized bed.
Claim 15
Dependent Claim
18 words
The process of claim 13 wherein the contacting and regeneration steps are carried out in a counter-current fashion.
Claim 16
Dependent Claim
21 words
The process of claim 1 wherein both the initial contacting and the regeneration steps are carried out in a fixed bed.
Claim 17
Dependent Claim
21 words
The process of claim 1 wherein both the initial contacting and the regeneration steps are carried out in a fluidized bed.
Claim 18
Dependent Claim
18 words
The process of claim 16 wherein the contacting and regeneration steps are carried out in a counter-current fashion.
Claim 19
Dependent Claim
20 words
The process of claim 1 wherein at least two metallic ions are removed by contact with the cation exchange resin.
Claim 20
Dependent Claim
72 words
A process for the removal of transition metal ions from highly acidic water solutions containing said ions which comprises contacting the solution with a polymethacrylic acid type ion exchange resin in its alkali metal or alkaline earth metal substituted form, depositing the transition metals thereupon and simultaneously providing a neutral effluent from the exchange including the additional step of regenerating the cation exchange resin in a regeneration solvent solution with a chelate.
Claim 21
Dependent Claim
72 words
A process for the removal of transition metal ions from highly acidic water solutions containing said ions which comprises contacting the solution with a polymethacrylic acid type ion exchange resin in its alkali metal or alkaline earth metal substituted form, depositing the transition metals thereupon and simultaneously providing a neutral effluent from the exchange including the additional step of regenerating the cation exchange resin in a regeneration solvent solution with a chelate.
Claim 22
Dependent Claim
34 words
The process of claim 19 which comprises the additional steps of precipitating said transition metal ions by the addition of an alkali or alkaline earth base to the solvent solution from the regeneration step.
Claim 23
Dependent Claim
29 words
The process of claim 20 which comprises carrying out the regeneration step with alcoholic solution of a chelate selected from the group consisting of alkali and alkaline earth betadionates.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |