Abstract: 3,5,5-Trimethylcyclohexa-2-en-1,4-diones is prepared by oxidizing 3,5,5-trimethylcyclohexa-3-en-one with molecular oxygen or a molecular oxygen-containing gas in the presence of an organic base and an organometallic complex catalyst comprising manganese, iron, cobalt or copper atom and at least four nitrogen atoms coordination-bonded thereto.
October 6, 1988
Date of Patent:
February 6, 1990
Soda Aromatic Company, Limited
Nobuhiko Ito, Kimio Kinoshita, Kiyonori Suzuki, Takeaki Eto
Abstract: A pellet of ethylene-vinyl acetate copolymer and a perfume are mixed in a mixer, and when the perfume has been impregnated into only the surface layer portion of the pellet, then a fine powder is added and mixed with the perfume-impregnated pellet for the purpose of coating the surface thereof.