Aromatic aldehyde, curing agent for epoxy resin, and composition based on epoxy resin containing aromatic aldehyde // 2636937
FIELD: chemistry.SUBSTANCE: invention relates to a novel aromatic aldehyde represented by the formula having a branched alkyl group containing from 10 to 14 carbon atoms and to the method for its production, to an epoxy resin curing composition comprising a polyamine compound and the claimed aromatic aldehyde, to the compositions based on epoxy resin for coating, of civil engineering and construction, containing the claimed curing composition, to the cured coating film and to the cured material. In formula (II), each of the groups R1 and R2 independently represents an alkyl group having 1 to 12 carbon atoms, and the total number of carbon atoms in the groups R1 and R2 is from 9 to 13.EFFECT: improving the properties of aldehyde.9 cl, 12 dwg, 2 tbl, 15 ex

Electrochemical method of oxidising of alcohols to carbonyl compounds // 2393272
FIELD: chemistry.SUBSTANCE: method involves preparation of a reaction mixture at room temperature consisting of the alcohol to be oxidised, sodium bicarbonate, an organic solvent and a nitroxyl radical. Electrolysis is carried out on platinum electrodes with current of 1 A and temperature of 20-25C. Potassium iodide is added to the reaction mixture. The organic solvent used is dichloromethane and the nitroxyl radical used is 4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxyl of formula: with ratio of alcohol to nitroxyl radical equal to 10:1.EFFECT: invention ensures high output of end products a within short period of time and less expenses on electricity using a high-technology method.2 ex