Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1980-11-12
1983-09-06
Guynn, Herbert B.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
252 85M, 2523151, 260440, 260446, B01J 1300, C07F 702
Patent
active
044028814
ABSTRACT:
A substantially dry method for making organophilic clays. Smectite clays, having a moisture content of less than 12% by weight are sprayed with an activator substance comprising about 1-10% by weight of the clay of a hydrophobic radical including those obtained from an "onium" base selected from a class consisting of ammonium, oxonium, sulfonium, arsonium, stibonium and telluronium. Organic amines and ammonium salts are preferred sources for the hydrophobic radical, and a substituted, hydrogenated tallow ammonium chloride is particularly preferred. The pretreated clay is then subjected to mechanical working such as by compaction to activate the clay.
The subject method avoids the addition of water or other solvent to the clay when adding the activator substance, and therefore avoids the added cost of later removing the water, or other solvent. The physical properties of the dry processed organophilic clay are superior in some respects to organophilic clays made by the prior art methods.
The organophilic clay made by the subject method can be used for gelling oils and oil-muds to suspend solids in a fluid when the fluid is static. It can also be used to impart cuttings-carrying ability to oil well drilling muds.
REFERENCES:
patent: 2531427 (1950-11-01), Hauser
patent: 2531440 (1950-11-01), Jordan
patent: 2859234 (1958-11-01), Clem
patent: 4105578 (1978-08-01), Finlayson
patent: 4193806 (1980-03-01), Finlayson
Barnett H. J.
Dewey Robert H.
Guynn Herbert B.
International Minerals & Chem. Corp.
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