摘要:
The invention relates to a process for the synthesis of a compound having the following formula (I), or a salt thereof, in which formula (I) R is a COOH, CH 2 OH or CHO group, comprising the step according to which but-3-ene-1,2-diol (BDO) is subjected to oxidation in the presence of a catalyst, said catalyst comprising an active phase based on at least one noble metal chosen from palladium, gold, silver, platinum, rhodium, osmium, ruthenium and iridium, and a support containing basic sites. The invention also relates to the application of this reaction to the preparation of bioavailable methionine compounds, in particular used in animal feed.
摘要:
The invention relates to a method for producing an olefin, a diene or a polyene, by catalytic conversion of at least one alcohol having a carbonated chain of at least three carbon atoms and different from propan-2-ol, in the presence of at least one catalyst based on the phosphate of a metal or a plurality of metals M, M being selected from the 15 lanthanides (lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium), yttrium, scandium and boron. The invention also relates to the applications of said method.
摘要:
The invention relates to a process for preparing acrolein from glycerol or glycerin, according to which glycerol or glycerin is dehydrated in the presence of a catalyst, the active phase of which consists of at least a) a silicon oxide, a zirconium oxide and at least one oxide of metal M, said metal being chosen from tungsten, cerium, manganese, niobium, tantalum, vanadium and titanium, or b) a titanium oxide, a zirconium oxide and at least one oxide of metal M, said metal being chosen from tungsten, cerium, manganese, niobium, tantalum, vanadium and silicon. This process may be used for the manufacture of 3-(methylthio)propionaldehyde (MMP), 2-hydroxy-4-(methylthio)butyronitrile (HMTBN), methionine and analogues thereof, from acrolein.