Abstract: Novel, fine particulate synthetic chalcoalumite, process for preparation thereof, and a heat insulating agent and agricultural film containing said fine, particulate synthetic chalcoalumite. The above objects are met by synthetic chalcoalumite represented by formula (1) below:
(M12+)a−x(M22+)Al3+4(OH)b(An−)c. mH2O (1)
(in which M12+ stands for Zn2+ or Cu2+,
M22+ is at least one divalent metal ion selected from Ni2+, Co2+, Cu2+, Zn2+ and Mg2+,
a is 0.3<a<2.0 (with the proviso that M1 and M2 are not the same),
x is 0 ≦x<1.0, and x<a
b is 10<b<14,
An− is at least one selected from SO42−, HPO42−, CO32−, SO32−, HPO32−, NO3−, H2PO4−, Cl−, OH− and silicate ion,
c is 0.4<c<2.
Abstract: Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions and their preparation. More particularly, the new SAPOs have a high silica:alumina ratio, and are prepared from single phase synthesis solutions, or from microemulsions containing surfactants.
Type:
Grant
Filed:
May 20, 1999
Date of Patent:
October 16, 2001
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
Karl G. Strohmaier, David E. W. Vaughan
Abstract: An inorganic polymeric aluminosilicate material and a method for preparing the same, are disclosed. Instead of having a fibrous structure, the material has a structure consisting of spindles with a length in the range of from 10 to 100 &mgr;m and a width in the range of from 2 to 20 &mgr;m. This polymeric aluminosilicate can be used for the production of antistatic layers.
Type:
Grant
Filed:
July 15, 1998
Date of Patent:
October 2, 2001
Assignee:
Eastman Kodak Company
Inventors:
Jeannine Rigola, Olivier J. Poncelet, Didier J. Martin
Abstract: Precipitated silica having the following parameters:
BET surface area
80-180 m2/g
CTAB surface area
80-139 m2/g
BET/CTAB ratio
1.0-1.6
Sears No. (consumption of
5-25 ml
0.1 N NaOH)
DBP No.
200-300 ml/100 g
Al2O3 content
<5%
wk coefficient
<3.4
Degraded particles
<1.0 &mgr;m
Non-degradable particles
1.0-100 &mgr;m
is prepared by reacting alkali silicate with mineral acids and aluminum sulfate solution at temperatures of 60-95° C. at a pH of 7.0-10.0 while stirring constantly, wherein the reaction is continued to a solids concentration of 40-110 g/l, the pH is adjusted to a value between 3 and 5, and the precipitated silica is filtered off, washed and then dried, and optionally ground or granulated.
Type:
Grant
Filed:
September 3, 1999
Date of Patent:
July 31, 2001
Assignee:
Degussa AG
Inventors:
Anke Blume, Burkhard Freund, Bernhard Schwaiger, Mustafa Siray, Stefan Uhrlandt