申请人:The British Petroleum Company p.l.c.
公开号:EP0328279A1
公开(公告)日:1989-08-16
A mixture of brominated aromatic hydrocarbons is produced by a two-stage process involving reacting an aromatic hydrocarbon and bromine in a first stage to give a penta-bromo derivative, and then, in the presence of the first stage product, reacting a further quantity of aromatic hydrocarbon and bromine to give tri-bromo derivative or a mixture of di- and tri-bromo derivatives with the latter predominating.
The mixture may have 40-95 mole per cent of tri- or di- and tri-bromo derivatives, and 40-5 mole per cent of penta-bromo derivative with not more than 2 mole per cent of tetra-bromo derivatives.
The mixture is suitable as a well bore fluid, and can be varied in composition to give products with a range of specific gravities for that purpose. The substantial absence of tetra-bromo derivatives means that the products can be used without toxicological problems.
溴化芳烃混合物是通过两阶段工艺生产的,第一阶段是芳烃和溴反应生成五溴衍生物, 然后在第一阶段产物存在的情况下,再生成一定量的芳烃和溴反应生成三溴衍生物或二溴和 三溴衍生物的混合物,后者占主导地位。
混合物中的三溴或二溴和三溴衍生物的含量可达 40-95 摩尔%,五溴衍生物的含量可达 40-5 摩尔%,四溴衍生物的含量不超过 2 摩尔%。
这种混合物可用作井孔液,并可通过改变其成分来获得不同比重的产品。四溴衍生物的大量缺失意味着这些产品在使用时不会产生毒理学问题。