There is disclosed a water-soluble, asymmetrical oxalic acid diarylamide of general formula ##STR1## wherein the substituents R.sub.1 are each independently of the other unsubstituted or hydroxy- or alkoxy-substituted C.sub.1 -C.sub.5 alkyl, unsubstituted or C.sub.1 -C.sub.5 alkyl-substituted benzyl, R.sub.2 is hydrogen, halogen, C.sub.1 -C.sub.12 alkyl or phenyl-C.sub.1 -C.sub.5 alkyl, R.sub.3 is hydrogen, halogen, C.sub.1 -C.sub.12 alkyl, phenyl-C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 alkox...

The present invention provides a composition that is suitable for lowering the alkalinity of a textile. The composition is also suitable for cleansing or treating a hard surface or a porous surface. The composition exhibits stability as a solution or as a dispersion at a temperature of about 0.degree. C. to about 8.degree. C. The composition includes a carrier, an acid, and a quaternary phosphonium compound, or a suitable salt or solvate thereof. The present invention also provides a method for ...

A process for the manufacture of oxalic acid dihydrate in which an aqueous solution of sodium oxalate is contacted with hydrochloric acid and the resulting mixture then cooled to precipitate oxalic acid, followed by optional recovery and recycling of the sodium oxalate and hydrochloric acid into the reaction chamber.

A process for the manufacture of oxalic acid dihydrate in which an aqueous solution of sodium oxalate is contacted with hydrochloric acid and the resulting mixture then cooled to precipitate oxalic acid, followed by optional recovery and recycling of the sodium oxalate and hydrochloric acid into the reaction chamber.

The present invention provides a composition that is suitable for lowering the alkalinity of a textile. The composition is also suitable for cleansing or treating a hard surface or a porous surface. The composition exhibits stability as a solution or as a dispersion at a temperature of about 0.degree. C. to about 8.degree. C. The composition includes a carrier, an acid, and a quaternary phosphonium compound, or a suitable salt or solvate thereof. The present invention also provides a method for ...

The nitrous oxides released when ethylene oxide is introduced at 30.degree.-70.degree.C. into aqueous nitric acid of 50-70 percent by weight of HNO.sub.3 is recirculated thereto and gaseous oxygen is introduced into the nitric acid. A post-oxidation holding of the oxidation mixture for 8-24 hours at 30.degree.-70.degree.C. increases the yield of oxalic acid.

Disclosed are oxalic acid diarylamides as ultraviolet absorbing agents for organic materials, the oxalic acid diarylamides being compounds of the formula A -- NH -- CO -- CO -- NH -- A in which A represents a member selected from the group consisting of ##SPC1## In which Z represents a member selected from the group consisting of a linear or branched alkyl group with 1 to 18 carbon atoms, an acetyl, butyryl, lauroyl, octadecanoyl, benzoyl, para-tertiary butylbenzoyl or para-chlorobenzoyl group, ...

Treatment of as-rolled foil, first with oxalic acid and thereafter with heating.

Ultraviolet light absorbers for plastics (for example polyolefins, e.g. polyethylene or polypropylene; polyvinylchloride; or a nitro lacquer), which may be incorporated with or without one or more other known ultraviolet light stabilizers into the plastics, have the formula I ##SPC1## in which each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 represents H, Cl, Br, --C.sub.n H.sub.2n.sub.+1, --C.sub.n H.sub.2n.sub.-1 or --O--C.sub.n H.sub.2n.sub.+1 or an --O--aryl,...

Oxalic acid is produced at high yield by the oxidation of ethylene glycol with an acid mixture comprising 2-60 wt percent nitric acid 20-78 wt percent sulfuric acid and 20-50 wt percent water. The molar ratio of nitric acid/ethylene glycol should not be less than 3/1.