申请人:Bartsch Michael
公开号:US20080177113A1
公开(公告)日:2008-07-24
A process for preparing biphenols of the general formula I
by reaction of monophenols of the general formula II
where the radicals R1, R2 and R3 are each, independently of one another, hydrogen, alkyl, aryl or arylalkyl having from 1 to 10 carbon atoms, in the presence of an oxidant in a reactor, wherein
a) the reactor comprises no stationary internals which act as baffles,
b) a total of not more than 0.6 mol of oxidant is used per one mol of monophenol, and
c) the oxidant is introduced either continuously or discontinuously in a plurality of portions over a period of from 10 minutes to 24 hours, with the amount of oxidant introduced per unit time not being constant over the total period of time but instead being varied.
一种制备苯二酚的方法,其通式为I,通过在反应采用通式II的单酚,其中基团R1、R2和R3各自独立地是氢、烷基、芳基或芳基烷基,烷基和芳基烷基具有1至10个碳原子,在反应釜中加入氧化剂,在以下条件下进行:a)反应釜不包含作为挡板的静态内部件;b)每一摩尔单酚使用不超过0.6摩尔的氧化剂;c)氧化剂连续或间歇地在10分钟至24小时内分多次加入,每单位时间加入的氧化剂量在总时间段内不是恒定的,而是变化的。