US4267068A
Expired / Lapsed
US
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Storage-stable, pourable silicate suspensions
Assignee: BASF SE
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Filing: 1979-05-22
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Granted: 1981-05-12
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Expires: 1999-05-22
Abstract
Abstract A storage-stable, pourable and pumpable aqueous suspension which contains finely divided water-insoluble sodium aluminum silicate and one or more hydroxyl-free saturated or unsaturated aliphatic dicarboxylic acids of 3 to 10 carbon atoms, or their alkali metal salts, as a stabilizer and flow improver.
Inventors
- 👤 Paul Diessel
- 👤 Johannes Perner
- 👤 Bernd Leutner
- 👤 Hans-Ulrich Schlimper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:49
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/026; C11; C11D; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128; C11D3/1286; C11D3/16; C11D3/20; C11D3/2075; C11D3/2082
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
A storage-stable, pourable and pumpable aqueous suspension which contains, based on the weight of suspension, from 20 to 60% of finely divided, water-insoluble sodium aluminum silicates, together with an organic acid or salt thereof as a stabilizer and flow improver, wherein the organic acid or salt thereof is exclusively one or more hydroxyl-free saturated or unsaturated dicarboxylic acids of 3 to 10 carbon atoms or alkali metal salts thereof, present in an amount of from 0.5 to 15%, based on the weight of the suspension.
Claim 2
Dependent Claim
85 words
A storage-stable, pourable and pumpable aqueous suspension which contains, based on the weight of suspension, from 20 to 60% of finely divided, water-insoluble sodium aluminum silicates, together with an organic acid or salt thereof as a stabilizer and flow improver, wherein the organic acid or salt thereof is exclusively one or more hydroxyl-free saturated or unsaturated dicarboxylic acids of 3 to 10 carbon atoms or alkali metal salts thereof, present in an amount of from 0.5 to 15%, based on the weight of the suspension.
Claim 3
Dependent Claim
39 words
A suspension as claimd in claim 1, which contains sodium aluminum silicates of the formula (Na.sub.2 O).sub.x.Al.sub.2 O.sub.3.(SiO.sub.2).sub.y.zH.sub.2 O where x is from 0.7 to 1.5, y is from 0.8 to 6 and z is from 3.0 to 7.0.
Claim 4
Dependent Claim
36 words
A suspension as claimed in claim 1, wherein the dicarboxylic acid is malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid or a mixture thereof.
Claim 5
Dependent Claim
22 words
A suspension as claimed in claim 1, wherein the dicarboxylic acid is a mixture of succinic acid, glutaric acid and adipic acid.
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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |