Kinetic resolution of 2-mono- and 2,2-disubstituted epoxides was accomplished using epoxide hydrolases from bacterial and fungal origin by employing lyophilized whole microbial cells. In all cases investigated, the biocatalytic hydrolysis was shown to proceed with retention of configuration at the stereogenic center leading to 1,2-diols and remaining epoxides. The selectivity of the reaction was dependent
Metalworking lubricant comprising an oil-in-water microemulsion
申请人:ALUMINUM COMPANY OF AMERICA
公开号:EP0362430A1
公开(公告)日:1990-04-11
A metalworking lubricant comprising an oil-in-water microemulsion and containing about 1-30 wt% natural or synthetic oil; about 0.5-30 wt% of a water-soluble surfactant, preferably a nonionic surfactant; about 1-20 wt% of an organic cosurfactant, preferably 1,2-octanediol; and about 45-97.5 wt% water containing less than about 1 wt% dissolved inorganic salts. The lubricant is suitable for various metalworking methods, including hot rolling and cold rolling of aluminum and aluminum alloys.