US4032466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid cleaner and process for disposal thereof
Assignee: Diversey Wyandotte Corp
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Filing: 1976-04-16
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Granted: 1977-06-28
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Expires: 1996-04-16
Abstract
Abstract A thickened acid cleaner concentrate composition comprising an inorganic acid, e.g., hydrochloric, an organic acid, e.g., oxalic, a nonionic surfactant, an anionic surfactant, a flocculating agent such as iron or aluminum ion and water is useful in cleaning vehicles such as railroad equipment. The waste water is then treated by flocculation and separation to remove suspended solids and entrained BOD prior to discharge or re-use within the plant. The flocculating agent in the composition provides a proportional pretreatment of the waste to facilitate the final treatment and separation of waste in the used composition.
Inventors
- 👤 Joseph V. Otrhalek
- 👤 Gilbert S. Gomes
- 👤 Robert E. Gansser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:34
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/042; C11D1/00; C11D1/66; C11D1/83; C11D3/16; C11D3/20; C11D3/2075; C23; C23G; C23G1/00; C23G1/02; C23G1/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
A thickened acid cleaner concentrate composition consisting essentially of: (1) a strong aqueous inorganic acid in an amount from about 5 to about 78 weight percent, (2) an organic acid selected from the group consisting of oxalic, tartaric, citric acid and mixtures thereof in an amount from about 1 to about 6 weight percent, (3) a nonionic surfactant in an amount from about 7 to about 23 weight percent, (4) an anionic surfactant in an amount from about 1 to about 7 weight percent, (5) a flocculating agent containing bivalent iron, trivalent iron or trivalent aluminum in soluble form in acid solution and in an amount of from about 1 to about 12 weight percent, and (6) water in an amount from about 75 to about 12 weight percent; all weight percents being based on the total composition, provided that the said nonionic surfactant and the said anionic surfactant when taken together constitute from about 10 to about 30 weight percent of said composition and said nonionic surfactant constitutes from about 75 to about 90 weight percent of the combined weight percent of nonionic and anionic surfactants.
Claim 2
Dependent Claim
187 words
A thickened acid cleaner concentrate composition consisting essentially of: (1) a strong aqueous inorganic acid in an amount from about 5 to about 78 weight percent, (2) an organic acid selected from the group consisting of oxalic, tartaric, citric acid and mixtures thereof in an amount from about 1 to about 6 weight percent, (3) a nonionic surfactant in an amount from about 7 to about 23 weight percent, (4) an anionic surfactant in an amount from about 1 to about 7 weight percent, (5) a flocculating agent containing bivalent iron, trivalent iron or trivalent aluminum in soluble form in acid solution and in an amount of from about 1 to about 12 weight percent, and (6) water in an amount from about 75 to about 12 weight percent; all weight percents being based on the total composition, provided that the said nonionic surfactant and the said anionic surfactant when taken together constitute from about 10 to about 30 weight percent of said composition and said nonionic surfactant constitutes from about 75 to about 90 weight percent of the combined weight percent of nonionic and anionic surfactants.
Claim 3
Dependent Claim
40 words
The composition according to claim 1 wherein the aqueous inorganic acid contains at least 50 weight percent aqueous hydrochloric acid and the remaining acid is selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid and nitric acid.
Claim 4
Dependent Claim
14 words
The composition according to claim 2 wherein all the acid is aqueous hydrochloric acid.
Claim 5
Dependent Claim
13 words
The composition according to claim 1 wherein the organic acid is oxalic acid.
Claim 6
Dependent Claim
17 words
The composition according to claim 1 wherein the nonionic surfactant is an alkyl or alkylaryl polyether alcohol.
Claim 7
Dependent Claim
17 words
The composition according to claim 1 wherein the anionic surfactant is an alkyl or alkylaryl sulfonic acid.
Claim 8
Dependent Claim
95 words
The composition according to claim 1 wherein said aqueous inorganic acid is in an amount from about 20 to about 30 weight percent, said organic acid is in an amount from about 2 to about 4 weight percent, said nonionic surfactant is in an amount from about 12 to 18 weight percent, said anionic surfactant is in an amount from about 2 to about 6 percent, said flocculating agent is in an amount of about 3 to 10 percent, and said water is present in an amount from about 61 to about 32 weight percent.
Claim 9
Dependent Claim
46 words
The composition according to claim 7 wherein said aqueous inorganic acid is all aqueous hydrochloric acid, said organic acid is oxalic acid, said nonionic surfactant is an alkylaryl polyether alcohol and said anionic surfactant is an alkyl sulfonic acid containing from 8 to 20 carbon atoms.
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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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |