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US4049379A
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Complex basic zirconium salts and aluminum salts
Assignee: BASF SE
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Filing: 1976-07-19
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Granted: 1977-09-20
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Expires: 1996-07-19
Abstract
Abstract New complex salts with zirconium and aluminum as central atoms and oxo, hydroxy, organic acido and sulfato groups as ligands, and a process for tanning skins and hides with these complex salts as tanning materials.
Inventors
- 👤 Hans Erdmann
- 👤 Franz-Friedrich Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:12
CPC Classifications
C; C14; C14C; C14C3/00; C14C3/02; C14C3/04; C07; C07F; C07F7/00; C07F7/003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
In a process for tanning skins and hides by treating the delimed and pickled skins and hides with an acid aqueous solution of a mineral tanning agent at a pH which is from 4.2 to 4.6 at the end of the treatment, the improvement which comprises using as the mineral tanning agent a complex salt of empirical formula [(ZrO).sub.a (Al).sub.b (OH).sub.c (R).sub.d (X).sub.f ] H.sub.e , in which R is a monocarboxylic acid radical of 1 to 4 carbon atoms, X is chloride or half of sulfate, a and b are independently of each other from 1 to 9, c is from 0 to ((4a+3b)-0.333(a+b)) and d is from 0.333 (a+b) to ((4a+3b)-0.333 (a+b)), provided c+d is from 0.333 (a+b) to (4a+3b), f is (4a+3b)-(c+ d) and e is 2a.
Claim 2
Dependent Claim
130 words
In a process for tanning skins and hides by treating the delimed and pickled skins and hides with an acid aqueous solution of a mineral tanning agent at a pH which is from 4.2 to 4.6 at the end of the treatment, the improvement which comprises using as the mineral tanning agent a complex salt of empirical formula [(ZrO).sub.a (Al).sub.b (OH).sub.c (R).sub.d (X).sub.f ] H.sub.e , in which R is a monocarboxylic acid radical of 1 to 4 carbon atoms, X is chloride or half of sulfate, a and b are independently of each other from 1 to 9, c is from 0 to ((4a+3b)-0.333(a+b)) and d is from 0.333 (a+b) to ((4a+3b)-0.333 (a+b)), provided c+d is from 0.333 (a+b) to (4a+3b), f is (4a+3b)-(c+ d) and e is 2a.
Claim 3
Dependent Claim
43 words
A process as claimed in claim 1 wherein the amount of said complex salt is sufficient to provide at least 0.03 mole of zirconium per 100 g of skin or hide and 0.02 mole of aluminum per 100 g of skin or hide.
Claim 4
Dependent Claim
26 words
A process as claimed in claim 1 wherein zirconium and aluminum are present in said complex salt in the molar ratio of from 4:6 to 9:1.
Claim 5
Dependent Claim
17 words
A process as claimed in claim 1 wherein c is in the range of 0 to (3a+2b).
Claim 6
Dependent Claim
14 words
A process as claimed in claim 1 wherein d is from 0.333(a+b) to (3a+2b).
Claim 7
Dependent Claim
11 words
A process as claimed in claim 1 wherein c+d equals 3a+2b.
Claim 8
Dependent Claim
43 words
A process as claimed in claim 1, wherein zirconium and aluminum are present in said complex salt in a molar ratio of from 4:6 to 9:1, c is from 0 to (3a+2b), d is from 0.333 (a+b) to (3a+2b) and c+d = 3a+2b.
Claim 9
Dependent Claim
25 words
A process as claimed in claim 1, wherein c is from 0 to (3a+2b), d is from 0.333 (a+b) to (3a+2b) and c+d = 3a+2b.
Claim 10
Dependent Claim
46 words
A process as claimed in claim 1, wherein c is from 0 to (3a+2b), d is from 0.333 (a+b) to (3a+2b) and c+d = 3a+2b, and R is the monocarboxylic acid radical of formic acid, acetic acid, propionic acid, lactic acid, acrylic acid or methacrylic acid.
Claim 11
Dependent Claim
28 words
A process as claimed in claim 1, wherein a is the monocarboxylic acid radical of formic acid, acetic acid, propionic acid, lactic acid, acrylic acid or methacrylic acid.
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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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |