US4060389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in the ammonia soda process or the ammonium chloride soda process
Assignee: Nihon Kinzoku Kogyo KK
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Filing: 1976-01-07
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Granted: 1977-11-29
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Expires: 1996-01-07
Abstract
Abstract An apparatus for use in the ammonia soda process or ammonium chloride soda process wherein those parts in contact with the ammoniacal brine, the mother liquor formed in the carbonation tower or the ammonium chloride mother liquor, are made of the austenitic steel consisting essentially of less than 0.05 wt. % of C; 0.1 - 2.0 wt. % of Si; 0.01 - 2.0 wt. % of Mn; 3.0 - 20.0 wt. % of Ni; 15.0 - 30.0 wt. % of Cr; 0.5 - 7.0 wt. % of Mo and the remainder iron.
Inventors
- 👤 Yoshiki Nishimura
- 👤 Kazutaka Sakiyama
- 👤 Tadao Adachi
- 👤 Kenji Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:45
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/02; B01J2219/00; B01J2219/02; B01J2219/025; B01J2219/0277; B01J2219/0286
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
In an apparatus having parts intended for contact with an ammoniacal brine, a mother liquor formed in the carbonation tower of an ammonia soda process, an ammonium chloride soda process solution or an ammonium chloride mother liquor, the improvement wherein the surfaces of said parts comprise an austenitic steel consisting essentially of less than 0.05 wt. % of C; 0.1 - 2.0 wt. % of Si; 0.01 - 2.0 wt. % of Mn; 3.0 - 20.0 wt. % of Ni; 15.0 - 30.0 wt. % of Cr; 0.5 - 7.0 wt. % of Mo and the remainder iron.
Claim 2
Dependent Claim
98 words
In an apparatus having parts intended for contact with an ammoniacal brine, a mother liquor formed in the carbonation tower of an ammonia soda process, an ammonium chloride soda process solution or an ammonium chloride mother liquor, the improvement wherein the surfaces of said parts comprise an austenitic steel consisting essentially of less than 0.05 wt. % of C; 0.1 - 2.0 wt. % of Si; 0.01 - 2.0 wt. % of Mn; 3.0 - 20.0 wt. % of Ni; 15.0 - 30.0 wt. % of Cr; 0.5 - 7.0 wt. % of Mo and the remainder iron.
Claim 3
Dependent Claim
63 words
The apparatus of claim 1, wherein said parts are made of the austenitic steel consisting essentially of less than 0.05 wt. % of C; 0.1 - 1.0 wt. % of Si; 0.2 - 2.0 wt. % of Mn; 12.0 - 20.0 wt. % of Ni; 15.0 - 22.0 wt. % of Cr; 4.0 - 7.0 wt. % of Mo and the remainder iron.
Claim 4
Dependent Claim
15 words
The apparatus of claim 2, wheren said parts are cooling tubes of a carbonation tower.
Claim 5
Dependent Claim
100 words
In an apparatus having surfaces intended for contact with an ammoniacal brine, a mother liquor formed in a carbonation tower of an ammonia soda process, ammonium chloride soda process solution, or ammonium chloride mother liquor, the improvement wherein said surfaces comprise a ferrite-austenitic steel consisting of less than 0.03 wt. % of C; 0.1 - 2.0 wt. % of Si; 0.01 - 2.0 wt. % of Mn; 3.0 - 10.0 wt. % of Ni; 22.0 - 30.0 wt. % of Cr; 0.5 - 5.0 wt. % of Mo; 0.05 - 0.30 wt. 1 of N 2 and the remainder iron.
Claim 6
Dependent Claim
100 words
In an apparatus having surfaces intended for contact with an ammoniacal brine, a mother liquor formed in a carbonation tower of an ammonia soda process, ammonium chloride soda process solution, or ammonium chloride mother liquor, the improvement wherein said surfaces comprise a ferrite-austenitic steel consisting of less than 0.03 wt. % of C; 0.1 - 2.0 wt. % of Si; 0.01 - 2.0 wt. % of Mn; 3.0 - 10.0 wt. % of Ni; 22.0 - 30.0 wt. % of Cr; 0.5 - 5.0 wt. % of Mo; 0.05 - 0.30 wt. 1 of N 2 and the remainder iron.
Claim 7
Dependent Claim
17 words
The apparatus of claim 4, wherein said surfaces are surfaces of cooling tubes of a carbonation tower.
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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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |