Air oxidation of 4-keto-.alpha.-ionone on solid surfaces to produce 4 -(1-hydroxy-4-oxo-2,6,6-trimethyl-2 -cyclohexene-1 -yl)-3-butene-2-one.

A process for the preparation of pyruvaldehyde which comprises the gradual addition of an aqueous solution of dihydroxyacetone to a water-immiscible organic liquid maintained at a temperature of about 100.degree. C. to about 200.degree. C. in the presence of an acidic catalyst and collecting the pyruvaldehyde produced. Suitable acidic catalysts include sulfuric acid, para-toluene sulfonic acid, acidic ion exchange resins, phosphoric acid and potassium acid sulfate.

A process is provided for the synthetic manufacture of urea from ammonia and carbon dioxide, in which the ammonium carbamate contained in the urea synthesis effluent stream is stripped and separated in mixed off-gas and returned to the synthesis reactor. The stripping of the carbamate takes place using previously separated mixed off-gas which is carried in a cycle to the heated stripping zone. A feed gas component which may be ammonia or carbon dioxide is also introduced into the zone, so that t...

Preparation of allyl chloride or methallyl chloride by reaction of oxygen th (a) propylene or isobutylene and hydrogen chloride or (b) a monochloropropane or monochlorisobutane in the presence of a catalyst containing (1) tellurium and/or compounds thereof, (2) basic nitrogen compounds or salts thereof and (3) vanadium, molybdenum or tungsten or compounds thereof.

Preparation of the polyphenol, 1,2-bis [P-(hydroxy-benzyl)Phenoxy] ethane, and the reaction of said polyphenol with formaldehyde to prepare a resole from which are prepared resin forms.

A process for preparing aromatic aldehydes which process consists of oxidizing substituted or unsubstituted toluene, xylene, pseudocumene with a molecular oxygen-containing gas in the presence of 0.1 to 25 moles of nitrobenzene.

Production of nitrilotrispropionic ureide by reaction of acrylic ureide with ammonia, and the new nitrilotrispropionic ureide itself which is a stabilizer for polyformaldehyde and a valuable starting material for the production of textile auxiliaries, synthetic resins and antistatic agents in the textile and plastics fields.

This invention is directed to the production of 2,2' -methylenebis (3, 4, 6-trichlorophenol), commonly known as hexachlorophene, by reacting 1 mol of 2, 4, 5-trichlorophenol, 1 mol of 2, 4, 5-trichlorophenylsulfate and 1 mol of formaldehyde in a solvent solution in which the 2, 4, 5-trichlorophenylsulfate has been prepared in situ by reacting 2, 4, 5-trichlorophenol with sulfurtrioxide.

Process for preparing technically pure 2,6-dimethylanisole comprising reacting 2,6-dimethylphenol and methyl chloride in an alkaline, aqueous medium at a temperature of from 20 to 100.degree. C. and a pressure of up to 15 atmospheres gauge and thereafter separating the 2,6-dimethylanisole by steam distillation from an alkaline solution.

The production of 2,6-dimethyl-3,4-dihalophenols by reaction of 2,6-dimethyl-4-tertiary-butylphenol with sulfuryl halides. The new products of the process are valuable starting materials for the production of fungicides and bactericides.