摘要:
The invention provides a process for modifying CNSL comprising subjecting the CNSL to ozonolysis to form ozonolysis reaction products followed by reduction of the ozonolysis reaction products to give a mixture of phenolic components and aldehydes. In a preferred embodiment, the invention provides a process for modifying CNSL which comprises the steps of first reacting CNSL with ozone to form a mixture containing ozonolysis reaction products, and secondly treating the mixture under reducing conditions to form a further mixture containing phenolic components with an eight carbon chain having a terminal CHO group and alkyl components of varying lengths with either one or two terminal CHO groups. The resulting CNSL aldehydes can be used to form adhesives for use in the manufacture of composites such as wood particle board.
摘要:
The invention relates to 3-cyano-2,4,5-trifluoro-benzoyl fluoride and intermediate products for the production thereof and a method for the production of 3-cyano-2,4,5-trifluoro-benzoyl fluoride starting from 5-fluoro-1,3-xylol (VIII), which is chlorinated twice in the presence of a catalyst with ionic conditions in the nucleus to obtain 2,4-dichloro-5-fluoro-1,3-dymethylbenzol (VII), which is then chlorinated with radical conditions in the side chains to obtain 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethyl benzol (VI), which is subsequently saponified by the optionally isolatable 2,4-dichloro-5-fluoro-3-dichloromethyl benzoic acid (V) to obtain 2,4-dichloro-5-fluoro-3-formyl-benzoic acid (IV) whose aldehyde group is converted to 2,4-dichloro-5-fluoro-3-N-hydroxyiminomethyl-benzoic acid (III), whereupon water is eliminated using an acid chloride while at the same time converting the carboxyl group into a chlorocarbonyl group to obtain nitrile 2,4-dichloro-3-cyano-5-fluoro-benzoyl-chloride (II), which is finally subjected to a fluorine/chlorine exchange.
摘要:
L'invention concerne un procédé de préparation d'hydroxybenzaldéhydes par oxydation d'alcools hydroxybenzyliques avec de l'oxygène ou un gaz contenant de l'oxygène caractérisé par le fait qu'il est effectué en milieu aqueux alcalin en absence de tout catalyseur de quelque nature que ce soit, à une température comprise entre 25 et 50°C et en présence d'un hydroxyde alcalin en quantité telle que le rapport molaire hydroxyde alcalin/alcool hydroxybenzylique engagé soit compris entre 2,25 et 10.
摘要:
This invention provides smoking compositions which contain a vanillin carboxylate type flavorant-release additive. Under cigarette smoking conditions, a combustible filler and/or paper wrapper additive such as 5-carboxyethylvanillin pyrolyzes and releases ethylvanillin as a volatile flavorant component of the cigarette smoke.