摘要:
The invention relates to a method for preparing a lauryl lactam consisting in carrying out a Beckmann rearrangement of a cyclododecanone oxime. Said method is carries out in a gaseous phase at a temperature ranging from 180 to 450 °C in the presence of a microporous material having a three-dimensional main inorganic structure consisting of tetrahedrons bonded by a common edge called zeolithe.
摘要:
The invention relates to a method of preparing dimethylcetene (DMK) by pyrolysis of isobutyric anhydride (ANIB), consisting in: (a) pre-heating a mixture to between 300 and 340 DEG C at atmospheric pressure, said mixture comprising between 1 and 50 % volume ANIB for between 99 and 50 % inert gas respectively; (b) bringing said mixture to a temperature of between 400 and 550 DEG C for a contact time of between 0.05 and 10 s in order to obtain a mixture of DMK, inert gas, isobutyric acid (AIB) or unreacted ANIB; and (c) cooling (condensation step) the mixture produced in step (b) in order to separate the gaseous mixture comprising the DMK from the condensed ANIB and/or AIB.