US4299809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of calcium chloride
Assignee: I S O
•
Filing: 1980-01-14
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Granted: 1981-11-10
•
Expires: 2000-01-14
Abstract
Abstract A process for the production of calcium chloride by the reaction of hydrochloric acid with calcium carbonate in the upper sealed portion of a reactor bordered on one side by a filtration sieve. The process comprises reacting the hydrochloric acid with the calcium carbonate to form carbon dioxide and calcium chloride solution, and pressuring the solution of calcium chloride by means of the carbon dioxide across the sieve and towards an outlet of the reactor.
Inventors
- 👤 Gerard Teyssier
- 👤 Marcel Lepant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:00
CPC Classifications
C; C01; C01F; C01F11/00; C01F11/20; C01F11/24; C01F11/28; B; B01; B01J; B01J8/00; B01J8/02; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00026; B01J2208/00035; B01J2208/0007; B01J2208/00539
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A process for the production of calcium chloride by the reaction of hydrochloric acid with calcium carbonate in the upper sealed portion of a reactor bordered on one side by a filtration sieve, a charge of said calcium carbonate resting on said sieve, said process comprising reacting said hydrochloric acid with said calcium carbonate by introducing said calcium carbonate and said hydrochloric acid on the same side of said filtration sieve to form carbon dioxide and calcium chloride solution, and pressuring said solution of calcium chloride downwardly by means of said carbon dioxide across said sieve and towards an outlet of said reactor.
Claim 2
Dependent Claim
103 words
A process for the production of calcium chloride by the reaction of hydrochloric acid with calcium carbonate in the upper sealed portion of a reactor bordered on one side by a filtration sieve, a charge of said calcium carbonate resting on said sieve, said process comprising reacting said hydrochloric acid with said calcium carbonate by introducing said calcium carbonate and said hydrochloric acid on the same side of said filtration sieve to form carbon dioxide and calcium chloride solution, and pressuring said solution of calcium chloride downwardly by means of said carbon dioxide across said sieve and towards an outlet of said reactor.
Claim 3
Dependent Claim
69 words
The process as defined by claim 1 comprising providing a neutralization zone in said upper sealed portion of said reactor, said neutralization zone comprising a layer of calcium carbonate, and further providing a reaction zone, said reaction zone being positioned above said neutralization zone and whereby said process comprises propelling said calcium chloride solution produced in said reaction zone towards the outlet of said reactor across said neutralization zone.
Claim 4
Dependent Claim
69 words
The process as defined by either of claims 1 or 2 further comprising pressuring said calcium chloride solution by means of said carbon dioxide into a separator and separating said solution and carbon dioxide gas from one another in said separator, whereby said solution descends by gravity within said separator to a storage tank and said process further comprises removing said separated carbon dioxide gas to a recovery apparatus.
Claim 5
Dependent Claim
43 words
The process as defined by claim 3 comprising providing a collector comprising interior baffles between said outlet of said reactor and the inlet of said separator and said process comprises pressuring said carbon dioxide gas and said calcium chloride solution through said collector.
References Cited (Backward Citations)
DE28087C
Cited
GB136896A
Cited
GB143844A
Cited
FR1426207A
Cited
FR1513749A
Cited
US3810970A
Cited
US4100254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |