Valuable Products from the Bottom of the Barrel Using ROSE Technoogy
Publication Date: 2012-May-04
The IP.com Prior Art Database
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Symposium: Bottom of the Barrel Processing, August 20-25, 1995, Chicago
Title: Valuable Products from the Bottom of the Barrel Using ROSE@Technology Authors: Jim Y. Low, Richard L. Hood, and Kelly Zachgo Lynch
Address: Kerr-McGee Corporation, TechnicaiCenter, P.O. Box 25861, Oklahoma City,
Key Words: Supercritical, Extraction, resid, upgrading, deasphalting, deasphalted oil.
In view of today's energy and economic situation, we strive for energy and economic consetvation whenever possible. Kerr-McGee's ROSE@Supercritical Fluid Technology can accomplish these objectives in the refining industry. Specifically, in the area of solvent deasphalting, the ROSE process saves about 50 percent of the required utilities by using supercritical conditions to recover the deasphalting solvent. An investment savings of 20 percent is also typical. Besides saving energy and investment costs, the ROSE technology can produce a variety of valuable products from the bottom of the barrel. The development and flexibility of the ROSE process have been reported in several technical publications (14). This report provides the results of producing a deasphalted oil (DAO) from an Arabian Light vacuum resid and a typical lube oil resid suitable for lube oil feedstock.
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The ROSE pilot plant has a capacity of one barrel per day. The schematic of the unit is shown in Figure 1. Inshort, the unit consists of three stages-asphaltene separator, resin separator, and DAO separator- to producethree products-asphaltenes, resin, and DAO, respectively. The unit can also be operated with two stages to produce two products, asphaltenes and DAO. In fact, most of the commercial ROSE units are two-stage units. A typical ROSE pilot plant extraction consists of dissolving the resid in a solvent at a certain volumetric solvent-to-oil ratioat an elevated pressure and temperature to facilitate the dissolution process. The undissolved resid (asphaltenes) is separated from the deasphalted oil in the first stage. In a three-stage operation, the resin is separated from the oil in the second stage, and finally the oil is separated from the solvent in the third stage. The solvent is recovered from the third stage and recycled under the supercritical conditions of the solvent. In a two-stage operation, the asphaltenes are again separated in the first stage, and the DAO and resins together are separated from the solvent in the second stage. This means of recovering the solvent significantly reduces the cost of utilities and is the major difference when compared to the solvent recovery method used in conventional solvent deasphalting technology.
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The flexibility of the ROSE process lies in its ability to produce various products from the extra-heavy oil or resids. For example, under certain extraction conditions, a clean and light oil suitable for lube oil feedstock can be produced. On the other extreme,...