Exxonmobil Research and Engineering Company

Merryl J Miranda

Daniel Paul Leta

Timothy Lee Hilbert

Michael B Carroll

Keith K Aldous

Eric D Joseck

Stephen M Cundy

Jeenok Theresa Kim

Edward W Corcoran

Marykathryn Lee

Bryan E Steuer

Lisa M Rogers

Jeenok T Kim

The invention below shows a preferred method to make high quality base oil at unexpectedly high yields using a combination of hydrotreatment of high waxy feedstocks accompanied by hydroisomerization of the resulting wax to produce an extra high VI lube of greater than 140VI and at least &#x2212;18 deg C. pour point or less. The preferred combinations of conditions identified below can surprisingly lead to unexpectedly high yields. This allows the use of higher oil content (or lower wax content) feedstocks.

Production of high viscosity index lube base oils

The present invention relates to a process for improving a deasphalting unit process by producing an improved feedstream for the deasphalting process via ultrafiltration of a vacuum resid-containing feedstream. In particular, the present invention produces an improved quality feedstream to a solvent deasphalting process which results in improved deasphalted oil (DAO) production rates and/or higher quality deasphalted oils. The present invention can be particularly beneficial when used in conjunction with an existing deasphalting equipment to result in improved deasphalted oil (DAO) production rates and/or higher quality deasphalted oils from the existing deasphalting equipment without the need for significant equipment modifications to the existing deasphalting unit.

Deasphalter unit throughput increase via resid membrane feed preparation

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Falls Church, VA, United States of America

Merryl J Miranda