US4444672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making calcium acetate deicing agents and product
Assignee: Individual
•
Filing: 1983-04-20
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Granted: 1984-04-24
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Expires: 2003-04-20
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. The calcium acetate salt product can be mixed with an inert solid material having good anti-slip properties.
Inventors
- 👤 Alan B. Gancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185; C07; C07C; C07C51/00; C07C51/41; C07C51/412
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
36 words
In a process of making a deicing agent of 5-95 percent by weight of calcium acetate having good anti-slip properties, the steps comprising: a. mixing calcium acetate with an inert solid material having good anti-slip properties.
Claim 2
Dependent Claim
36 words
In a process of making a deicing agent of 5-95 percent by weight of calcium acetate having good anti-slip properties, the steps comprising: a. mixing calcium acetate with an inert solid material having good anti-slip properties.
Claim 3
Dependent Claim
28 words
The process as defined in claim 1, wherein said calcium acetate salt and said inert solid material having good anti-slip properties are both mixed in a dry condition.
Claim 4
Dependent Claim
45 words
In a process of making a deicing agent of 5-95 percent by weight of calcium acetate, having good anti-slip properties, the steps comprising: a. mixing calcium acetate, water and an inert solid material having good anti-slip properties; and b. drying the mixture of sub-part (a).
Claim 5
Dependent Claim
45 words
In a process of making a deicing agent of 5-95 percent by weight of calcium acetate, having good anti-slip properties, the steps comprising: a. mixing calcium acetate, water and an inert solid material having good anti-slip properties; and b. drying the mixture of sub-part (a).
Claim 6
Dependent Claim
14 words
The process as described in claim 3, wherein the calcium acetate is in solution.
Claim 7
Dependent Claim
20 words
The process as described in claim 4, wherein the inert solid material is in suspension in the calcium acetate solution.
Claim 8
Dependent Claim
54 words
In a process of making a deicing agent of 5-95 percent by weight of calcium acetate, having good anti-slip properties, the steps comprising: a. mixing calcium acetate, water and an inert solid material having good anti-slip properties, b. agregating the mixture of sub-part (a) in the form of pellets; and c. drying the pellets.
Claim 9
Dependent Claim
54 words
In a process of making a deicing agent of 5-95 percent by weight of calcium acetate, having good anti-slip properties, the steps comprising: a. mixing calcium acetate, water and an inert solid material having good anti-slip properties, b. agregating the mixture of sub-part (a) in the form of pellets; and c. drying the pellets.
Claim 10
Dependent Claim
80 words
In a process of making a calcium acetate-containing deicing agent having good anti-slip properties, the steps comprising: a. adding coarse limestone to a calcium acetate-containing solution; b. agitating the calcium acetate-coarse limestone suspension; c. converting said suspension into a damp calcium acetate salt; d. mixing said damp calcium acetate salt with an inert solid material having good anti-slip properties; and e. aggregating said calcium acetate salt-inert solid material mixture to produce pellets containing both calcium acetate and inert solid material.
Claim 11
Dependent Claim
80 words
In a process of making a calcium acetate-containing deicing agent having good anti-slip properties, the steps comprising: a. adding coarse limestone to a calcium acetate-containing solution; b. agitating the calcium acetate-coarse limestone suspension; c. converting said suspension into a damp calcium acetate salt; d. mixing said damp calcium acetate salt with an inert solid material having good anti-slip properties; and e. aggregating said calcium acetate salt-inert solid material mixture to produce pellets containing both calcium acetate and inert solid material.
Claim 12
Dependent Claim
19 words
The process as described in claim 1, 3, 6 or 7, wherein said inert solid material is crushed limestone.
Claim 13
Dependent Claim
18 words
The process as described in claims 1, 3, 6, or 7, wherein said inert solid material is sand.
Claim 14
Dependent Claim
23 words
The process as described in claim 7, wherein said coarse limestone comprises up to about 10 percent by weight of the deicing agent.
Claim 15
Dependent Claim
32 words
The process as described in claim 7, wherein step (d) comprises mixing about 5-95 percent by weight on a dry weight basis of said calcium acetate salt with the inert solid material.
Claim 16
Dependent Claim
41 words
A calcium acetate-containing deicing agent having good anti-slip properties comprising a mixture of calcium acetate salt and an inert solid material, wherein the calcium acetate salt comprises from about 5-95 percent by weight on a dry weight basis of said mixture.
Claim 17
Dependent Claim
41 words
A calcium acetate-containing deicing agent having good anti-slip properties comprising a mixture of calcium acetate salt and an inert solid material, wherein the calcium acetate salt comprises from about 5-95 percent by weight on a dry weight basis of said mixture.
Claim 18
Dependent Claim
16 words
The deicing agent as described in claim 12, wherein the inert solid material comprises crushed limestone.
Claim 19
Dependent Claim
15 words
The deicing agent as described in claim 12, wherein the inert solid material comprises sand.
References Cited (Backward Citations)
US2026121A
Cited
US2410910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |