Complex trinuclear metal salts, methods for the production of these salts by reaction of salts of aluminum or of aluminum and trivalent chromium, which contain monovalent anions, with acrylic acid and the amount of an alkaline reacting agent necessary for their neutralization or with salts of acrylic acid and a method of tanning using these metal salts.

Production of chlorinated polyethylene foams by heating a mixture of chlorinated polyethylene, a crosslinking agent and an expanding agent. The foams, which are flexible and self-extinguishing may be used for example as insulating material, upholstery padding and packaging components.

Separation of basic inorganic compounds from the reaction mixture obtained in the manufacture of hydroxypivalic acid neopentylglycol ester (2,2-dimethyl-1,3-propanediol-hydroxypivalic monoester) by the addition of formic acid to the mixture obtained from the reaction of hydroxypivalaldehyde in the presence of basic catalysts, followed by filtration. The compound produced in the process of the invention is a valuable intermediate in the manufacture of polyesters, synthetic resins and plasticizers...

A method of coating copper, brass, zinc, iron or steel or of bonding these metals to each other or to plastics materials using a mixture of an ethylene copolymer containing copolymerized units of an ethylenically unsaturated carboxylic acid and from 0.01 to 5 percent of the weight of said copolymer of a compound having the general formula: ##SPC1## The resulting coated materials or bonded assembles being particularly resistant to the action of water or moisture.

In an electrocoating process acid binders which are present at least partly in the form of their salts with basic compounds are used and the basic compounds used for salt formation consist of the extent of 0.1 to 50 percent of the neutralization equivalent of the acid binder of at least one arylamine and/or alkynylamine and/or quaternary ammonium hydroxide and/or phosphonium hydroxide with at least one aromatic ligand, and other conventional additives and non-basic corrosion inhibitors may be co...

Thiocarbamides comprising at least one carbodiimide group and at least one thiocarbamic ester group of the formula ##STR00001##

The invention relates to a process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, in which a fluid reaction mixture which comprises amines and from which the catalysts are separated off is formed in a reactor. After the catalysts have been separated off, a measurement of the absorption of UV/VIS radiation by the reaction mixture is carried out to determine the concentration of nitro and nitroso compounds in the reaction mixture.

A process for rectificatively separating an acrylic acid-containing liquid, by withdrawing an acrylic acid-rich stream from the rectification column above the feed point and polymerization-inhibiting the upper section of the rectification column by means of diacrylic acid.

The present invention relates to a process for purifying 1,4-butynediol, which comprises compressing 1,4-butynediol to from 50 to 1500 bar, depressurizing it, waiting for phase separation to occur after depressurization and separating off the bottom phase, and a process for the hydrogenation of 1,4-butynediol to 1,4-butenediol and 1,4-butanediol using the purified 1,4-butynediol.

A process for improving the durability, dimensional stability and surface hardness of a wood body is described, in which an untreated wood body is impregnated with an aqueous solution of A) an impregnating agent from the group consisting of 1,3-bis(hydroxymethyl)-4,5-dihydroxyimidazolidin-2-one, 1,3-bis(hydroxymethyl)-4,5-dihydroxyimidazolidin-2-one modified with a C.sub.1-5-alcohol, a polyol or mixtures thereof, 1,3-dimethyl-4,5-dihydroxyimidazolidin-2-one, dimethylolurea, bis(methoxymethyl)ure...