US4986925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitors and deicing agents
Assignee: Bakelite Chemicals LLC
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Filing: 1989-08-10
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Granted: 1991-01-22
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Expires: 2009-08-10
Abstract
Abstract A process and composition for controlling ice and/or snow with reduced corrosion involves a mixture comprising an alkali metal salt; a lignosulfonate; and a corrosion reducing additive in the form of a salt of aluminum, antimony, cadium, cobalt, manganese, nickel, zinc, and combinations thereof.
Inventors
- 👤 Larry B. Fiske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:43
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
56 words
A process for deicing ice or snow-covered surfaces with reduced corrosivity, said process comprising: applying to a surface a deicing composition comprising: (1) an alkali and/or alkaline earth metal chloride; and (2) a lignosulfonate; and (3) an effective amount of a corrosion reducing additive salt of aluminum, antimony, cadmium, cobalt, manganese, nickel, zinc, and combinations thereof.
Claim 2
Dependent Claim
56 words
A process for deicing ice or snow-covered surfaces with reduced corrosivity, said process comprising: applying to a surface a deicing composition comprising: (1) an alkali and/or alkaline earth metal chloride; and (2) a lignosulfonate; and (3) an effective amount of a corrosion reducing additive salt of aluminum, antimony, cadmium, cobalt, manganese, nickel, zinc, and combinations thereof.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein said metal chloride, said lignosulfonate, and said corrosion reducing additive are added in dry form.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said lignosulfonate comprises a spent sulfite liquor.
Claim 5
Dependent Claim
30 words
The process of claim 1 wherein said mixture comprises 75 wt % or more metal chloride, 1-20 wt % lignosulfonate, and above about 0.1 wt % corrosion reducing additive cation.
Claim 6
Dependent Claim
15 words
The process of claim 1 further comprising applying a non-slipping agent simultaneously with said mixture.
Claim 7
Dependent Claim
18 words
The process of claim 1 comprising applying said mixture at a pH from about 4.5 to about 8.5.
Claim 8
Dependent Claim
70 words
A process for deicing ice or snow-covered surfaces by a process comprising: applying to an ice or snow-covered surface a deicing composition consisting essentially of: (a) an alkali and/or alkaline earth metal chloride; (b) a lignosulfonate; and (c) an amount effective to reduce the corrosive effects of said metal chloride of an additive salt selected from the group consisting of aluminum, antimony, cadmium, cobalt, manganese, nickel, zinc, and mixtures thereof.
Claim 9
Dependent Claim
70 words
A process for deicing ice or snow-covered surfaces by a process comprising: applying to an ice or snow-covered surface a deicing composition consisting essentially of: (a) an alkali and/or alkaline earth metal chloride; (b) a lignosulfonate; and (c) an amount effective to reduce the corrosive effects of said metal chloride of an additive salt selected from the group consisting of aluminum, antimony, cadmium, cobalt, manganese, nickel, zinc, and mixtures thereof.
Claim 10
Dependent Claim
42 words
The process of claim 7 wherein the applying step comprises applying said deicing composition consisting essentially of at least 75 wt % of said metal chloride, about 1-20 wt % lignosulfonate, and more than about 0.1 wt % of said additive salt.
Claim 11
Dependent Claim
56 words
A composition for removing ice from a surface with reduced corrosivity, said composition comprising in combination: (1) ice and/or snow; (2) an alkali or alkaline earth metal chloride, (3) a lignosulfonate, and (4) an amount effective to reduce corrosion of a corrosion reducing additive salt of aluminum, antimony, cadmium, cobalt, manganese, nickel, zinc, and combinations thereof.
Claim 12
Dependent Claim
56 words
A composition for removing ice from a surface with reduced corrosivity, said composition comprising in combination: (1) ice and/or snow; (2) an alkali or alkaline earth metal chloride, (3) a lignosulfonate, and (4) an amount effective to reduce corrosion of a corrosion reducing additive salt of aluminum, antimony, cadmium, cobalt, manganese, nickel, zinc, and combinations thereof.
Claim 13
Dependent Claim
24 words
The composition of claim 7 wherein the composition comprises 80-94 wt % metal chloride, 4-10 wt % lignosulfonate, and 0.2-2% corrosion reducing additive cation.
Claim 14
Dependent Claim
12 words
The composition of claim 7 wherein the lignosulfonate comprises spent sulfite liquor.
Claim 15
Dependent Claim
13 words
The composition of claim 7 wherein said corrosion reducing salt comprises zinc chloride.
Claim 16
Dependent Claim
31 words
A concentrate composition comprising: about 10 to about 70 wt % alkali and/or alkaline earth metal chloride; more than about 25 wt % lignosulfonate; and about 0.5-20 wt % additive cation.
Claim 17
Dependent Claim
31 words
A concentrate composition comprising: about 10 to about 70 wt % alkali and/or alkaline earth metal chloride; more than about 25 wt % lignosulfonate; and about 0.5-20 wt % additive cation.
Claim 18
Dependent Claim
50 words
A composition consisting essentially of: (a) an alkali and/or alkaline earth metal chloride; (b) a lignosulfonate; and (c) an amount effective to reduce the corrosive effects of said metal chloride of an additive salt selected from the group consisting of aluminum, antimony, cadmium, cobalt, manganese, nickel, zinc, and mixtures thereof.
Claim 19
Dependent Claim
50 words
A composition consisting essentially of: (a) an alkali and/or alkaline earth metal chloride; (b) a lignosulfonate; and (c) an amount effective to reduce the corrosive effects of said metal chloride of an additive salt selected from the group consisting of aluminum, antimony, cadmium, cobalt, manganese, nickel, zinc, and mixtures thereof.
Claim 20
Dependent Claim
33 words
The composition of claim 14 consisting essentially of at least 75 wt % of said metal chloride, about 1-20 wt % lignosulfonate, and more than about 0.1 wt % of said additive salt.
Claim 21
Dependent Claim
38 words
The composition of claim 14 consisting essentially of about 10 to about 70 wt % of said metal chloride, at least about 25 wt % lignosulfonate, and about 0.5 to about 20 wt % of said additive salt.
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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) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |