Method and apparatus for preparing monofunctional aromatic chloroformates suitable for use as chainstopping agents
申请人:General Electric Company
公开号:US06392079B1
公开(公告)日:2002-05-21
A continuous process for the preparation of monofunctional aromatic chloroformates (MAC) having the structure (I)
wherein n is an integer from 1 to 5, and R1 represents hydrogen, a branched or unbranched alkyl group having from 1-15 carbon atoms, an aryl group which may be substituted or unsubstituted, a cycloaliphatic group which may be substituted or unsubstituted, or an arylalkyl group which may be substituted or unsubstituted, the method comprising the steps of
a) introducing
1) an aqueous caustic solution;
2) a carbonyl chloride;
3) at least one monofunctional hydroxyaromatic compound; and
4) at least one inert organic solvent into a continuous reaction system; and
b) effecting contact between 1), 2), 3) and 4) for a time and at conditions sufficient to produce a MAC of structure (I).
一种连续制备单官能芳基氯甲酸酯(MAC)的方法,其结构式为(I),其中n为1至5的整数,R1表示氢、分支或未分支的含有1-15个碳原子的烷基、可能被取代或未取代的芳基、可能被取代或未取代的环烷基或可能被取代或未取代的芳基烷基。该方法包括以下步骤:a)将1)水性碱溶液;2)羰基氯;3)至少一种单官能羟基芳香化合物;和4)至少一种惰性有机溶剂引入连续反应系统;并b)使1)、2)、3)和4)接触一段时间,以及在足够条件下制备出结构式(I)的MAC。