US3761570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing sulfur compounds from gas
Assignee: Grillo Werke AG
•
Filing: 1969-12-17
•
Granted: 1973-09-25
•
Expires: 1989-12-17
Abstract
Abstract Sulfur compounds are removed from gases by contacting the gas with an aqueous suspension of a hydrolyzed admixture of an amphoteric component, more particularly oxide, hydrated oxide or hydroxide of aluminum, zinc, iron or manganese, and a basic component, more particularly an oxide or hydroxide of an alkali metal or alkaline earth metal.
Inventors
- 👤 N Lowicki
- 👤 G Hanig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:13
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
19 words
Process according to claim 1, wherein the temperature of the gas during said contacting is up to about 110*C.
Claim 2
Dependent Claim
19 words
Process according to claim 1, wherein the temperature of the gas during said contacting is about 40 - 110*C.
Claim 3
Dependent Claim
17 words
Process according to claim 1, wherein the pH of the aqueous suspension is about 6 to 7.
Claim 4
Dependent Claim
17 words
Process according to claim 1, wherein the pH of the aqueous suspension is about 6.5 to 7.
Claim 5
Dependent Claim
17 words
Process according to claim 1, the suspension having a solids content of about 15 - 50 wt.-%.
Claim 6
Dependent Claim
17 words
Process according to claim 1, the suspension having a solids content of about 25 - 40 wt.-%
Claim 7
Dependent Claim
14 words
Process according to claim 1, the contacting time being less than about 3 seconds.
Claim 8
Dependent Claim
23 words
Process according to claim 1, wherein the gas is contacted with the aqueous suspension at a gas velocity of at least 5 meters/sec.
Claim 9
Dependent Claim
13 words
Process according to claim 1, wherein sulfur dioxide is removed from the gas.
Claim 10
Dependent Claim
13 words
Process according to claim 1, wherein hydrogen sulfide is removed from the gas.
Claim 11
Dependent Claim
10 words
Process according to claim 1, said admixture comprising magnesium manganites.
Claim 12
Dependent Claim
26 words
Process according to claim 12, the magnesium manganites containing MgO and MnO2 in a molar ratio of 1 to 10 MgO to 1 to 4 MnO2.
Claim 13
Dependent Claim
17 words
Process according to claim 13, said molar proportion of MgO to MnO2 ranging from 3:1 to 6:1.
Claim 14
Dependent Claim
14 words
Process according to claim 1, wherein the temperature of said contacting is about 70-100*C.
Claim 15
Dependent Claim
26 words
Process according to claim 1, the contacting time being less than about 3 seconds, and the gas velocity during said contacting is at least 5 meters/sec.
Claim 16
Dependent Claim
13 words
Process according to claim 1, the contacting time being less than 1 SECOND.
Claim 17
Dependent Claim
28 words
Process according to claim 1, and removing a portion of charged absorbent, and adding roasted absorbent to the recycled aqueous suspension for hydration thereof in the aqueous suspension.
Claim 18
Dependent Claim
27 words
Process according to claim 18, and roasting the removed, charged absorbent and utilizing the roasted absorbent thereby produced as the roasted absorbent added to the recycle stream.
Claim 19
Dependent Claim
17 words
Process according to claim 18, wherein the pH of the aqueous suspension is about 6 to 7.
Claim 20
Dependent Claim
45 words
Process according to claim 18, wherein aqueous medium of the aqueous suspension is removed with the removed charged absorbent, the removed aqueous medium is filtered from the removed charged absorbent, and the filter cake is dried, and the filtrate is returned to the aqueous suspension.
Claim 21
Dependent Claim
55 words
Process according to claim 20, wherein said sulfur compound is at least one of the group sulfur dioxide and hydrogen sulfide, the temperature of said contacting is up to 110*C, and said oxidic compounds comprise magnesium manganites containing MgO and MnO2 in a molar ratio of 1 to 10 MgO to 1 to 4 MnO2.
Claim 22
Dependent Claim
14 words
Process according to claim 22, wherein the gas contacted with the absorbent is wet.
Claim 23
Dependent Claim
22 words
Process according to claim 22, and roasting the removed charged absorbent to produce the roasted absorbent added to the recycled aqueous suspension.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |