US4386010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treated attapulgite clay composition
Assignee: BASF Catalysts LLC
•
Filing: 1981-12-02
•
Granted: 1983-05-31
•
Expires: 2001-12-02
Abstract
Abstract Attapulgus clay rendered substantially non-swelling and non-gelling by calcination is treated with a large organophilic quaternary ammonium or phosphonium compound to yield a sorbent material effective for purifying liquids from inorganic and organic contaminants. Treatment of the mineral substrate may be accomplished by mixing in a liquid system or by spraying a solution of the quaternary ammonium surfactant onto the mineral. Surfactant on the mineral is present in quantities approximating the exchange capacity of the mineral.
Inventors
- 👤 Steven J. Hildebrandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:44
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12; C; C11; C11D; C11D3/00; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/1253; C11D3/126
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A solid particulate composition comprising particles of attapulgite clay calcined to a volatile matter content of 10 percent by weight or less at a temperature in the range of about 200°-550° C. and having a surface area of about 80-140 m. 2 /g. as determined by the standard B.E.T. method using nitrogen, a pore volume of about 0.5-0.8 cc./g., and a cationic exchange capacity in the range of 10-40 meq./100 g., said calcined attapulgite clay having been treated with at least one organic substituted quaternary cationic surfactant selected from the group consisting of ammonium, phosphonium and mixtures thereof having at least one organic group of at least four carbon atoms in the amount within the range of about 5-50 meq./100 g. of clay.
Claim 2
Dependent Claim
123 words
A solid particulate composition comprising particles of attapulgite clay calcined to a volatile matter content of 10 percent by weight or less at a temperature in the range of about 200°-550° C. and having a surface area of about 80-140 m. 2 /g. as determined by the standard B.E.T. method using nitrogen, a pore volume of about 0.5-0.8 cc./g., and a cationic exchange capacity in the range of 10-40 meq./100 g., said calcined attapulgite clay having been treated with at least one organic substituted quaternary cationic surfactant selected from the group consisting of ammonium, phosphonium and mixtures thereof having at least one organic group of at least four carbon atoms in the amount within the range of about 5-50 meq./100 g. of clay.
Claim 3
Dependent Claim
66 words
The composition of claim 1 wherein said surfactant is selected from the group consisting of tallowammonium acetate, cocotrimethylammonium chloride, tallowtrimethylammonium chloride, trimethyl hexadecylammonium chloride, cetyltrimethylammonium bromide, benzyltrimethylammonium chloride, dimethyl dicocoammonium chloride, dimethyldi (hydrogenated tallow) ammonium chloride, methyl-tri (C 8 -C 10 )-ammonium chloride, tetrapropylammonium chloride, tetrapropylammonium chloride monohydrate, dimethyltallowbenzylammonium chloride, methylbis (2-hydroxy-ethyl octadecylammonium chloride, N,N,N',N',N',-pentamethyl-N-tallow-1, 3-propanediammonium chloride, 1-ethylenebis (2-tallow, 1-methyl, imidazolinium methyl sulfate), methyl-1-tallowamidoethyl-2-tallowimidazolinium methyl sulfate.
Claim 4
Dependent Claim
23 words
The composition of claim 1 wherein said surfactant is present in amount within the range of about 15-35 meq./100 g. of said clay.
References Cited (Backward Citations)
US2367384A
Cited
US2885360A
Cited
US2797196A
Cited
US3677939A
Cited
US4033764A
Cited
US4079001A
Cited
US4167481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |