US3904741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alcohol soluble basic aluminum chlorides and method of making same
Assignee: Reheis Co Inc
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Filing: 1970-10-26
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Granted: 1975-09-09
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Expires: 1990-10-26
Abstract
Abstract Basic aluminum chloride solids having a high degree of solubility in anhydrous alcohol and having particular utility as astringents in antiperspirants may be made by carefully controlling the molar ratio of aluminum to chloride and the amount of free and coordinated water present in the solid. A preferred method of making the solid comprises heating an aqueous solution of basic aluminum chloride having an Al/Cl ratio of about 1.9 under reflux conditions for about 2 to 4 hours and spray drying the solution to a friable solid having 18 to 20 weight percent of calculated free and coordinated water.
Inventors
- 👤 John L Jones
- 👤 Andrew M Rubino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:57
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61Q; A61Q15/00; C; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01F7/57
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A METHOD OF PREPARING A TWO-THIRDS TO FIVE-SIXTHS BASIC ALUMINUM CHLORIDE SOLID HAVING A HIGH DEGEE OF SOLUBILITY IN ALCOHOL COMPRISING THE STEPS OF PREPARING AN AQUEOUS SOLUTION OF TWO-THIRDS TO FIVER-SIXTHS BASIC ALUMINUM CHLORIDE, THEN HEATING THE SOLUTION OF BASIC ALUMINUM CHLORIDE UNDER REFLUX CONDITIONS, DRYING THE REFLUXED SOLUTION TO A SOLID HAVING A CALCULATED WEIGHT PERCENT OF FREE AND COORDINATED WATER LYING WITHIN THE RANGE ENCOMPASSED BY THE QUADRILATERAL DEFINED BY POINTS A,B,C AND D IN THE ACCOMPANYING DRAWING, AND COOLING THE SOLID TO AT LEAST ABOUT AMBIENT TEMPERATURE TO IMPEDE DECREASES IN COMPATABILIY OF THE SOLID.
Claim 2
Independent Claim
99 words
A METHOD OF PREPARING A TWO-THIRDS TO FIVE-SIXTHS BASIC ALUMINUM CHLORIDE SOLID HAVING A HIGH DEGEE OF SOLUBILITY IN ALCOHOL COMPRISING THE STEPS OF PREPARING AN AQUEOUS SOLUTION OF TWO-THIRDS TO FIVER-SIXTHS BASIC ALUMINUM CHLORIDE, THEN HEATING THE SOLUTION OF BASIC ALUMINUM CHLORIDE UNDER REFLUX CONDITIONS, DRYING THE REFLUXED SOLUTION TO A SOLID HAVING A CALCULATED WEIGHT PERCENT OF FREE AND COORDINATED WATER LYING WITHIN THE RANGE ENCOMPASSED BY THE QUADRILATERAL DEFINED BY POINTS A,B,C AND D IN THE ACCOMPANYING DRAWING, AND COOLING THE SOLID TO AT LEAST ABOUT AMBIENT TEMPERATURE TO IMPEDE DECREASES IN COMPATABILIY OF THE SOLID.
Claim 3
Dependent Claim
24 words
A method according to claim 1 wherein the aqueous solution is heated at about 100*C. under reflux conditions for about 2 to 4 hours.
Claim 4
Dependent Claim
12 words
A method according to claim 1 wherein the solution is spray dried.
Claim 5
Dependent Claim
13 words
A method according to claim 1 wherein the solution is cooled after refluxing.
Claim 6
Dependent Claim
46 words
A method according to claim 1 wherein the basic aluminum chloride has an Al/Cl mol ratio of about 1.90 to 1.92 and the solution is dried to a solid having a calculated weight per cent of free and coordinated water of about 18 to about 20.
Claim 7
Independent Claim
120 words
A method of preparing a two-thirds to five-sixths basic aluminum chloride solid having a high degree of solubility in alcohol comprising the steps of preparing an aqueous solution of two-thirds to five-sixths basic aluminum chloride, then heating the solution of basic aluminum chloride under reflux conditions, drying the refluxed solution to a solid having a calculated weight percent of free and coordinated water of not more than about 10 weight percent (based on the total weight of the solid) below the calculated weight percent of free and coordinated water present at the point at which the solution just becomes a friable solid, and cooling the solid to at least about ambient temperature to impede decreases in compatibility of the solid.
Claim 8
Independent Claim
120 words
A method of preparing a two-thirds to five-sixths basic aluminum chloride solid having a high degree of solubility in alcohol comprising the steps of preparing an aqueous solution of two-thirds to five-sixths basic aluminum chloride, then heating the solution of basic aluminum chloride under reflux conditions, drying the refluxed solution to a solid having a calculated weight percent of free and coordinated water of not more than about 10 weight percent (based on the total weight of the solid) below the calculated weight percent of free and coordinated water present at the point at which the solution just becomes a friable solid, and cooling the solid to at least about ambient temperature to impede decreases in compatibility of the solid.
Claim 9
Dependent Claim
24 words
A method according to claim 6 wherein the aqueous solution is heated at about 100*C. under reflux conditions for about 2 to 4 hours.
Claim 10
Dependent Claim
12 words
A method according to claim 7 wherein the solution is spray dried.
Claim 11
Dependent Claim
13 words
A method according to claim 8 wherein the solution is cooled before drying.
Claim 12
Dependent Claim
45 words
A method according to claim 6 wherein the basic aluminum chloride has an Al/Cl mol ratio of about 1.90 to 1.92 and the solution is dried to a solid having a calculated weight percent of free and coordinated water of about 18 to about 20.
Claim 13
Dependent Claim
31 words
A 2/3 to 5/6 basic aluminum chloride solid made according to the method of claim 1 and having a high degree of solubility in anhydrous ethanol within 2 to 6 hours.
Claim 14
Dependent Claim
19 words
A basic aluminum chloride solid according to claim 11 having an Al/Cl mol ratio of about 1.85 to 1.95.
Claim 15
Dependent Claim
31 words
A 2/3 to 5/6 basic aluminum chloride solid made according to the method of claim 6 and having a high degree of solubility in anhydrous ethanol within 2 to 6 hours.
Claim 16
Dependent Claim
19 words
A basic aluminum chloride solid according to claim 13 having an Al/Cl mol ratio of about 1.85 to 1.95.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |