A composition is described comprising a mineral oil having uniformly admixed therewith a thickener comprising at least one compound selected from those which conform to the empirical crystal formula (LiA/sub x/)/sub y/2Al(OH)/sub 3/nH/sub 2/O where A represents one or more monovalent or multivalent anions and/or negative-valence radicals or mixtures thereof, x represents a quantity of A ions or radicals sufficient to substantially satisfy the valence requirements of Li, n represents zero or the number of waters of hydration, and y is a numerical value at least sufficient to maintain the crystalline structure.
BACKGROUND OF THE INVENTION:
Crystalline compositions conforming generally to the empirical formula Li.sup.+ (RCOO.sup.31).2Al(OH).sub.3.nH.sub.2 O, where RCOO.sup.31 represents an organic acid anion, are disclosed, inter alia, in U.S. Pat. Nos. 4,348,295, 4,348,296, and 4,348,297. These 3 patents are incorporated herein by reference. Other relevant background patents are U.S. Pat. Nos. 4,116,856; 4,116,858; 4,159,311; 4,221,767; 4,347,327; 4,321,065; 4,376,100; and 4,381,349, all of which disclose related lithium aluminates.
Also disclosed are crystalline LiX.2Al(OH).sub.3.nH.sub.2 O compounds and derivatives thereof, e.g., where the X anion represents OH, halide, halo acid, inorganic acid, organic acid and others. The compounds are referred to generally as "lithium aluminates" and are prepared, principally, by reacting lithium salts with hydrous alumina and forming crystalline LiX.2Al(OH).sub.3.nH.sub.2 O which in some cases are of the "two-layer" variety and in some cases of the "three-layer" variety, depending on the particular method or materials employed. Methods for preparing these known crystalline lithium aluminates, of the LiX.2Al(OH).sub.3.nH.sub.2 O and LiOH.2Al(OH).sub.3.nH.sub.2 O formulae, both 2-layer and 3-layer varieties, and anion exchanges or replacements in the crystals, are disclosed in the patents identified above especially those incorporated by reference.
SUMMARY OF THE INVENTION:
It is within the purview of the present inventive concept, that crystalline compounds of the following empirical formula be combined with hydrocarbon and/or organic materials, said empirical formula being illustrated as ps
where A represents one or more anions and/or negative-valence radicals, including mixtures of such anions and/or negative-valence radicals, said anions and negative-valence radicals being monovalent or multivalent,
where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,
where n represents number of waters of hydration, and may be zero or more, especially about 0 to about 6,
and where y is numerical value sufficient to maintain the crystalline structure, especially about 0.5 to about 2.
In the above formula, the A moiety may represent only one kind, or a mixture of kinds, of anion or negative-valence radical, or may represent, e.g., at least one inorganic group along with at least one organic group.
Dow Chemical Co., Midland, MI
Resource Relation: Patent File Date
14 April 1986
Country of Publication:
02 PETROLEUM; ALUMINATES; CHEMICAL COMPOSITION; LITHIUM COMPOUNDS; MINERAL OILS; AQUEOUS SOLUTIONS; CLATHRATES; CRYSTALS; VALENCE; VISCOSITY; ALKALI METAL COMPOUNDS; ALUMINIUM COMPOUNDS; DISPERSIONS; MIXTURES; OILS; ORGANIC COMPOUNDS; OTHER ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; SOLUTIONS; 023000* - Petroleum- Properties & Composition; 020500 - Petroleum- Products & By-Products