A process for removal of H.sub.2 S from gaseous streams is described, the process being characterized by division of the gaseous stream into major and minor portions, oxidation of the H.sub.2 S in the major portion with an oxidizing reactant solution comprising a polyvalent metal chelate or chelates of nitrilotriacetic acid, and utilization of the minor portion as a source of hydrogen ions to assist precipitation of ferrous oxalate from a bleed stream of the oxidizing reactant solution.

A process for producing oxalic acid, sodium oxalate or mixtures thereof comprises treating crude sodium oxalate solids or slurry, such as produced by the Bayer process in treating bauxite. The crude sodium oxalate solids or slurry include at least aluminum metal ions as well as other metal ions common to the Bayer process. The removal process comprises: dissolving the crude sodium oxalate in an aqueous solution to form a solution of sodium oxalate; separating insolubles from the solution; passin...

A plasticized polycarbonate composition comprising in admixture a high molecular weight aromatic carbonate polymer and a minor amount of an oligomeric-polymeric oxalate.

The tie-down properties of multifilament surgical sutures are improved by coating the suture with an absorbable composition comprising a poly(alkylene oxalate) wherein the alkylene is a C.sub.6 or a mixture of C.sub.4 to C.sub.12 alkylene moieties. Braided sutures coated with from about 1 to 15 percent by weight of the composition are characterized by a smooth knot tie-down under both wet and dry conditions.

A process for the preparation of oxalate esters by the catalytic oxidative carbonylation of an alkoxycycloalkene with carbon monoxide, an alcohol and oxygen or an oxygen-containing gas in the presence of a metal salt catalyst and an amine base. In addition, a catalytic amount of particular metal oxidizing salts is employed along with a catalytic amount of an acid or an amine salt compound. Alternatively various counterions and ligands of the metal salt catalysts may be employed.

A composition and method of treatment for desensitizing hypersensitive dentin and cementum capable of effective results specially in one-treatment application. The essential ingredient or compound of the desensitizing composition is an alkali metal or ammonium oxalate where this salt may be mono- or di-substituted. The hydrogen or mono-substituted salts are preferred due to their lower pH which renders them more efficient in the protocol of this invention. These oxalates may be used effectively ...

A process for the preparation of oxalate esters by the catalytic oxidative carbonylation of an amide acetal having the formula ##STR1## with carbon monoxide and oxygen or oxygen-containing gas in the presence of a metal salt catalyst, an amine base and a catalytic amount of an alcohol. Preferably a catalytic amount of particular oxidizing metal salts is employed along with a catalytic amount of an amine salt compound which may be formed in situ by the addition of an acid. Alternatively various c...

The invention provides a method for the treatment of a condition, disorder or a disease of the skin by administering a pharmaceutically acceptable oxalate. Preferably, the oxalate is a transition metal oxalate and the pharmaceutically acceptable carrier is an ointment.

Durable flame retardancy and a soft hand are imparted to cellulosic textile materials by applying and curing an aqueous solution of tetrakis(hydroxymethyl)phosphonium oxalate and urea, a melamine, or a methylolated nitrogenous cellulose reactant or mixtures thereof to the textile materials.

The invention relates to dicopper(I) oxalate complexes stabilised by neutral Lewis base components and to the use thereof as precursors for the deposition of metallic copper. The neutral Lewis bases used are alkynes or alkenes containing at least one silyl or ester group, or nitrites, saturated or unsaturated nitrogen ligands, phosphites, trialkyl-phosphines or oxygen- or sulfur-containing ligands.