会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 49. 发明授权
    • Process for the acylation of aromatic ethers
    • 芳香醚酰化的方法
    • US6013840A
    • 2000-01-11
    • US765533
    • 1997-01-09
    • Michel SpagnolLaurent GilbertEric BenazziChristian Marcilly
    • Michel SpagnolLaurent GilbertEric BenazziChristian Marcilly
    • B01J29/08C07C45/46C07C49/84C07C205/04C07C211/09C07C231/12C07C235/32C07C253/30C07C255/40C07C45/00
    • B01J29/084C07C45/46
    • The present invention concerns a process for the acylation of an aromatic ether.Preferably the invention relates to a process for the acylation of a substituted aromatic ether, in particular veratrol.The acylation process of the invention consists of reacting the ether with an acylation agent in the presence of a zeolitic catalyst, and is characterized in that the acylation reaction is carried out in the presence of an effective quantity of a catalyst comprising a faujasite type zeolite or a Y zeolite with the following physico-chemical characteristics:an atomic ratio denoted "global Si/Me.sup.1 " between the number of atoms of the element silicon and the number of atoms of every trivalent element Me.sup.1 contained in the zeolite in the range 2.4 to 90, preferably in the range 2.4 to 75, and more preferably in the range 2.4 to 60;an Me.sup.2 alkali metal content such that the atomic ratio Me.sup.2 /Me.sup.1(IV) between the number of atoms of alkali metal Me.sup.2 and the number of atoms of every trivalent element Me.sup.1(IV) included in the zeolitic network is less than 0.2, preferably less than 0.1, and more preferably less than 0.05.
    • PCT No.PCT / FR96 / 00716 Sec。 371日期1997年1月9日 102(e)日期1997年1月9日PCT提交1996年5月10日PCT公布。 出版物WO96 / 35655 日期:1996年11月14日本发明涉及一种酰化芳族醚的方法。 优选地,本发明涉及酰化取代的芳族醚,特别是藜芦醇的方法。 本发明的酰化方法包括在沸石催化剂存在下使醚与酰化剂反应,其特征在于酰化反应在有效量的含有八面沸石型沸石的催化剂或 具有以下物理化学特性的Y沸石:在元素硅的原子数与沸石中所含的每个三价元素Me1的原子数在2.4至90之间的原子比表示为“全局Si / Me1” ,优选在2.4至75范围内,更优选在2.4至60范围内; Me2碱金属含量使得碱金属Me2的原子数与沸石网络中包含的每个三价元素Me1(IV)的原子数之间的原子比Me2 / Me1(IV)小于0.2,优选较少 小于0.1,更优选小于0.05。