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Patent US4377488A successfully refreshed from Google Patents.
US4377488A
Expired / Lapsed
US
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Process of making calcium acetate deicing agents
Assignee: MILLER & QUINN A PARTNERSHIP OF PA
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Filing: 1981-12-21
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Granted: 1983-03-22
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Expires: 2001-12-21
Abstract
Abstract A process of making a calcium acetate-containing solution having a pH value at room temperature between about 7 and about 8 is provided comprising reacting acetic acid with a carbonate compound, adding calcined limestone, and optionally finishing off the acid-base reaction with an amount of an alkali metal hydroxide comprising from about 2% to about 5% of the total stoichiometric complement to the amount of acetic acid. Further process options which may be used in the preparation of deicing agents include adding coarse limestone to the above-prepared calcium acetate-containing solution in amounts up to 10% by weight and converting the solution into solid flakes.
Inventors
- 👤 Alan B. Gancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:50
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185; C07; C07C; C07C51/00; C07C51/41; C07C51/412
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
In a process of making a calcium acetate-containing solution having a pH value at room temperature in the range from about 7 to about 8, the steps comprising: a. reacting acetic acid and an amount of calcined limestone comprising about 95% to about 98% of the total stoichiometric complement of said acetic acid; and b. adding an alkali metal hydroxide in an amount comprising from about 2% to about 5% of said total stoichiometric complement.
Claim 2
Dependent Claim
75 words
In a process of making a calcium acetate-containing solution having a pH value at room temperature in the range from about 7 to about 8, the steps comprising: a. reacting acetic acid and an amount of calcined limestone comprising about 95% to about 98% of the total stoichiometric complement of said acetic acid; and b. adding an alkali metal hydroxide in an amount comprising from about 2% to about 5% of said total stoichiometric complement.
Claim 3
Dependent Claim
98 words
In a process of making a calcium acetate-containing solution having a pH value at room temperature in the range from about 7 to about 8, the steps comprising: a. completely reacting a carbonate with acetic acid, wherein the amount of said carbonate comprises from about 50% to about 70% of the total stoichiometric complement of said acid; b. adding calcined limestone in an amount comprising from about 25% to about 50% of said total stoichiometric complement; and c. adding an alkali metal hydroxide in an amount comprising from about 2% to about 5% of said total stoichiometric complement.
Claim 4
Dependent Claim
98 words
In a process of making a calcium acetate-containing solution having a pH value at room temperature in the range from about 7 to about 8, the steps comprising: a. completely reacting a carbonate with acetic acid, wherein the amount of said carbonate comprises from about 50% to about 70% of the total stoichiometric complement of said acid; b. adding calcined limestone in an amount comprising from about 25% to about 50% of said total stoichiometric complement; and c. adding an alkali metal hydroxide in an amount comprising from about 2% to about 5% of said total stoichiometric complement.
Claim 5
Dependent Claim
40 words
In a process of making a calcium-acetate containing deicing agent, the steps comprising: a. adding coarse limestone to a calcium acetate-containing solution; b. agitating the calcium acetate-coarse limestone suspension; and c. converting said suspension into a substantially solid deicing agent.
Claim 6
Dependent Claim
40 words
In a process of making a calcium-acetate containing deicing agent, the steps comprising: a. adding coarse limestone to a calcium acetate-containing solution; b. agitating the calcium acetate-coarse limestone suspension; and c. converting said suspension into a substantially solid deicing agent.
Claim 7
Dependent Claim
22 words
The process as defined in claim 3, wherein said coarse limestone comprises up to about 10% by weight of said deicing agent.
Claim 8
Dependent Claim
33 words
In a process of making calcium acetate-containing solid flakes, the steps comprising: a. removing water from a substantially saturated calcium acetate-containing solution by heating the solution to form a solid calcium acetate-containing product.
Claim 9
Dependent Claim
33 words
In a process of making calcium acetate-containing solid flakes, the steps comprising: a. removing water from a substantially saturated calcium acetate-containing solution by heating the solution to form a solid calcium acetate-containing product.
References Cited (Backward Citations)
US4239736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |