<p>A control system controls a lubricating oil dewaxing apparatus. The temperature of waxy oil flowing through the apparatus is controlled. A sequential plurality of temperature sensing means senses the temperature of the waxy oil. A Comparing Means determines an isothermal heat transfer zone corresponding to latent heat transfer wax crystallization. Temperature upstream of the isothermal zone is controlled to a selected chilling rate. Temperature downstream of the isothermal zone is controlled to a selected filtering temperature. The control system effects the growth of wax crystals of a uniform and moderate size for optimum filtering rate and oil content.</p>
申请公布号
EP0348044(A2)
申请公布日期
1989.12.27
申请号
EP19890305288
申请日期
1989.05.25
申请人
TEXACO DEVELOPMENT CORPORATION
发明人
HARRISON, CHARLES WESLEY;GERONDALE, MICHAEL JOSEPH;PATRONE, ANTHONY JOSEPH;YANG ONG, JAMES OW