US3881948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing organic acid soil from surfaces
Assignee: Reckitt and Colman Subsidiary Corp
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Filing: 1973-07-20
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Granted: 1975-05-06
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Expires: 1993-07-20
Abstract
Abstract A method of removing soils containing free or combined organic acids comprising contacting the said soil with a composition containing at least one polyhydric alcohol or a lower aliphatic ester or ether thereof having at least two free hydroxyl groups and a small amount of an alkaline acting catalytic compound capable of accelerating alcoholysis reactions, heating the soil and cleaning composition to at least 250*F and then removing the residue, and to novel cleaning compositions.
Inventors
- 👤 Daniel Schoenholz
- 👤 Arthur W Petersen
- 👤 Jr Marcus Allen Northup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:47
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/263; C11D3/00; C11D3/0005; C11D3/0057; C11D7/261; C11D7/266; C11D7/32; C11D7/3227; C11D2111/00; C11D2111/10; C11D2111/14; C11D2111/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A METHOD OF REMOVING SOLIDS CONTAINING FREE OR COMBINED ORGANIC ACIDS COMPRISING CONTACTING THE SAID SOIL WITH A WEAKLY ALKALINE COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST ONE POLYHYDRIC ALCOHOL COMPOUND HAVING AT LEAST TWO FREE HYDROXYL GROUPS IN WHICH THE NUMERICAL RATIO OF CARBON ATOMS TO HYDROXY GROUPS IS NOT GREATER THAN 15, AND 0.01 TO 2 PERCENT BY WEIGHT OF AN ALKALINE ACTING CATALYST CAPABLE OF ACCELERATING ALCOHOLYSIS REACTIONS, HEATING THE SOIL AND CLEANING COMPOSITION TO AT LEAST 250*F TO 550*F TO FORM WATER SOLUBLE OR WATER DISPERSIBLE COMPOUNDS, AND THEN REMOVING THE RESIDUES REMAINING.
Claim 2
Independent Claim
96 words
A METHOD OF REMOVING SOLIDS CONTAINING FREE OR COMBINED ORGANIC ACIDS COMPRISING CONTACTING THE SAID SOIL WITH A WEAKLY ALKALINE COMPOSITION CONSISTING ESSENTIALLY OF AT LEAST ONE POLYHYDRIC ALCOHOL COMPOUND HAVING AT LEAST TWO FREE HYDROXYL GROUPS IN WHICH THE NUMERICAL RATIO OF CARBON ATOMS TO HYDROXY GROUPS IS NOT GREATER THAN 15, AND 0.01 TO 2 PERCENT BY WEIGHT OF AN ALKALINE ACTING CATALYST CAPABLE OF ACCELERATING ALCOHOLYSIS REACTIONS, HEATING THE SOIL AND CLEANING COMPOSITION TO AT LEAST 250*F TO 550*F TO FORM WATER SOLUBLE OR WATER DISPERSIBLE COMPOUNDS, AND THEN REMOVING THE RESIDUES REMAINING.
Claim 3
Dependent Claim
78 words
The method of claim 1 wherein the polyhydric alcohol compound having at least 2 hydroxy groups is selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, glycerol, diglycerol, triglycerol, pentaerythritol, sorbitol, mannitol, inositol, trimethylol propane, trimethylol ethane, aliphatic diols of 2 to 7 carbon atoms, aliphatic triols of 2 to 7 carbon atoms, and partial esters of polyols having at least 2 free hydroxy group and aliphatic carboxylic acids of 1 to 7 carbon atoms.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the catalyst is at least one member of the group consisting of an alkali metal and alkaline earth metal bases and salts.
Claim 5
Dependent Claim
24 words
The method of claim 1 wherein the polyhydric alcohol compound has a ratio of carbon atoms to hydroxyl groups of not more than 4.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein the polyhydric alcohol is selected from the group consisting of mannitol and sorbitol and the catalyst is non-caustic and non-toxic.
Claim 7
Dependent Claim
10 words
The method of claim 1 wherein the composition is anhydrous.
Claim 8
Dependent Claim
34 words
The method of claim 1 wherein the polyhydric alcohol has a boiling point above 350*F, is water-soluble and melts below 500*F and is present in 10 to 90 percent by weight of the composition.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein the carbon atomhydroxyl ratio is 4 to 1 or less.
Claim 10
Dependent Claim
38 words
The method of claim 1 wherein the alkaline acting catalyst is selected from the groups consisting of alkali metal and alkaline earth metal bases and salts, alkali metal alcoholates and alkoxides of calcium, magnesium, lead, tin and zinc.
Claim 11
Dependent Claim
29 words
The method of claim 1 wherein the composition also contains at least one member of the group consisting of a surface active agent and an inert, fine granular material.
References Cited (Backward Citations)
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US3335092A
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US3779933A
Cited
US3658711A
Cited
US3808051A
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |