Exxon Research and Engineering Company

Daniel J Eustace

Bhaskara M Rao

Evelyn N Drake

Peter Calcavecchio

Dan A Farcasiu

Donald B Siano

Joseph A Shropshire

Paul A Malachesky

The dispersed aqueous phase of a shear thickening composition, useful as a well control fluid which comprises a water-in-oil emulsion having hydratable, water-expandable hydrophillic clay, dispersed in the continuous, surfactant-containing oily phase thereof, hydratable, water-expandable hydrophillic clay, is prepared by mixing an aqueous solution of a polyacrylamide with an aqueous solution of polyacrylic acid wherein the concentration of the polymer in each separate solution used to prepare said aqueous phase is less than about 2 wt %.

Shear thickening compositions containing polyacrylic acid and

An improved electrolyte for an Li/TiS.sub.2 current producing system, such as a battery, features at least one lithium solute of the general formula LiXF.sub.a, where X is selected from a group consisting of B, P, Sb, and As, and wherein a is 4 for B and 6 for P, Sb, and As. The solute(s) are supported in a solvent consisting of at least 1,3 dioxolane, and more particularly in a mixture of 1,3 dioxolane (DIOX) and 1,2 dimethoxyethane (DME) ranging in percent ratios of (DIOX:DME) from 100/0 to 40/60 by weight.

Li/TiS.sub.2 Current producing system

A current producing Li/TiS.sub.2 electrochemical cell is featured which has a cyclic ether-containing electrolyte, and an inhibitor against the polymerization of the cyclic ether by TiS.sub.2, which cyclic ether otherwise polymerizes in the presence of TiS.sub.2.

Compositions for stabilizing electrolytes in Li/TiS.sub.2 systems

An improved method of removing bromine from fluid streams comprises contacting the fluid stream with an aqueous solution of certain asymmetrical quaternary ammonium bromides whereby a liquid, water immiscible bromine complex is formed that can be stored, manipulated and readily handled and which complex can be dissociated to liberate molecular bromine.

Recovery, manipulation and storage of bromine

An improved aqueous metal-halogen electrochemical cell, particularly a zinc bromide cell, contains a water soluble tetraorgano-substituted ammonium salt in the electrolyte which forms a substantially water insoluble liquid complex with cathodic halogen thereby reducing self-discharge of the cell. Particularly preferred as the ammonium salt is N-ethyl, N-methyl morpholinium bromide.

Metal halogen electrochemical cell

An improved metal-halogen electrochemical cell particularly a zinc bromide cell, contains a water soluble organo substituted amino acid salt in the electrolyte which forms a substantially water insoluble liquid complex with cathodic halogen thereby reducing self-discharge of the cell.

Metal-Halogenelectrochemical cell

An improved electrochemical cell comprises an alkali metal anode, a cathode, an oxidant of at least one quaternary ammonium polyhalide salt, and a dipolar aprotic electrolyte containing an ionizable salt of an alkali metal. A specific example includes a lithium anode, a carbon cathode, a tetraalkylammonium tribromide salt and an electrolyte of one mole lithium hexafluoride dissolved in propylene carbonate, which cell provides an open circuit voltage of about 3.6 volts. The oxidant can be incorporated in the cathode structure or be added independently to the cell, e.g., by use of a circulating electrolyte.

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Chatham, NJ, United States of America

Daniel J Eustace