ROSE Process

If an intermediate resin fraction is desired, another separator and stripper system would be installed right after the asphaltene separator in figure 7.5. To recover a resin fraction, the overhead solution from the asphaltene separator, which now consists of butane, resins, and light oils, is heated to near the critical temperature of butane. At this elevated, near-critical temperature the solvent power of compressed liquid butane decreases and the resins precipitate from solution. The overhead stream from this separator consists of light oils dissolved in near-critical liquid butane. 

Numerous other SCF applications are currently being pursued in industrial research and development laboratories in the United States. In chapters 8 through 10 we describe the state of the art in supercritical fluids research. 

The factors that motivated the use of supercritical fluid solvents in developing separation processes were the quite rapid increase in the cost of energy during the 1970s the increased scrutiny of industrial solvents by the government the public s increased awareness of pollution control and the increased performance demands made on specialized materials. 

By the late 1970s evidence had accumulated on the potential hazards of certain extraction solvents, especially chlorinated hydrocarbons. Increased scrutiny of traditional industrial solvents is responsible for spawning another large body of R D programs on SCF processes. Increased consumer awareness of potential chemical hazards coupled with the uncertainty of future governmental regulatory action motivated an examination of supercritical fluids as extraction solvents for foods, beverages, and spices. 

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ROSE process Roses Rosette Rose water Rosin... 

Fig. 11. Schematic of a residuum oil supercritical extraction (ROSE) process using compressed pentane to separate vacuum resids into asphaltenes (high...

Fractionation. Kett-McGee developed the ROSE process for separating the heavy components of cmde oil, eg, asphaltenes, resins, and oils, in the 1950s. This process was commercialized in the late 1970s, when cmde oil and utility costs were no longer inexpensive. In the ROSE process (Fig. 11), residuum and pentane ate mixed and the soluble resins and oils recovered in the supetctitical phase. By stepwise isobatic temperature increases, which decrease solvent density, the resin and oil fractions ate precipitated sequentially. 

FIG. 22-23 Schematic (iagram of the Kerr-McGee ROSE process. 

Temperature-Controlled Residuiun Oil Supercritical Extraction (ROSE) The Kerr-McCee ROSE process has been used worldwide for over two decades to remove asphaltenes from oil. The extraction step uses a hquid solvent that is recovered at supercritical conditions to save energy as shown in Fig. 20-21. The residuum is contacted with butane or pentane to precipitate the heavy asphaltene fraction. The extract is then passed through a series of heaters, where it goes from the liquid state to a lower-density SCF state. Because the entire process is carried out at conditions near the critical point, a relatively small temperature change is required to produce a fairly large density change. After the light oils have been removed, the solvent is cooled back to the liquid state and recycled. 

The ROSE process is a solvent deasphalting process with minimum energy consumption using a super-critical solvent recovery system and the process is of value in obtaining oils for further processing. (Gearhart, 1980 Low et al., 1995, Hydrocarbon Processing, 1996 Northrup and Sloan, 1996). 

ROSE process a solvent deasphalting process (q.v.) that uses a super-critical solvent recovery system to obtain high-quality oils from heavy feedstocks (q.v.) for further processing. 

Avsar, Y., Kurt, U., Gonullu, T. (2007). Comparison of classical chemical and electrochemical processes for treating rose processing wastewater. J. Hazard. Mater. 148, 340-345. 

Figure 7.5 A schematic diagram of the ROSE process for separating residuum using a supercritical fluid solvent (Anon., 1981a).

Figure 7.6 Solubility behavior of naphthalene in supercritical C02-Line D to P is a path to separate dissolved oils in the ROSE process.

The oil-propane solution is withdrawn from the top of the vessel, is expanded in pressure through a valve, and is sent to another vessel. Because of the reduction in pressure, the oil-propane solution loses its ability to dissolve the heavier fractions of the oil and part of the oil precipitates. The bottom layer of precipitated oil is removed from this second vessel, and the top phase is reduced in pressure again across another valve and is sent to a third vessel where another oil-rich phase is removed as a bottoms sdeam. The top phase from the third vessel is reduced in pressure to about the critical conditions of propane and is sent to aseparaiion where propane and the remaining oil are separated. Tliis process looks much like the ROSE process described in chapter 7. 

Leonard, Garwin, Gearhart, and Roach are names that appear liberally in the next few patents. They invented many variations of the basic ROSE process for Kerr-McGee Corporation. After having discussed the basic ROSE process operation in Chapter 7, we have selected other variations of the process to serve as addidonal teaching tools. 

ROSE process, 153-156 light oil precipitation step, 153 schematic diagram, 153 Roselius, W., 296... 

Gearhart, J. A., and L. Garwin. 1976. ROSE process improves resid feed. Hydrocarbon Process. May, 55 125-128. 

Commercial plants for soKd extraction with SCFs have so far been used mainly in the food and pharmaceutical industry and employ solely carbon dioxide as the SCF component The most important processes among them are described below. SCFs have also been used as solvents to separate liquid mixtures. One example is the Residuum Oil Supercritical Extraction (ROSE) process for extracting residual petroleum reservoirs with sc butane and/or pentane [2, 3]. 

Several current applications have been widely publicized. Kerr-McGee developed its ROSE (Residuum Oil Supercritical Extraction) process in the 1950s IGupta and Johnston. 2008 Hunphrey and Keller. 1997 Johnston and Lemert. 1997 McHugh and Krukonis. 19941. When oil prices went up, the process attracted considerable attention, since it has lower operating costs than conpeting processes. The ROSE process uses an SCF such as propane to extract useful hydrocarbons from the residue left after distillation. This process utilizes the high tenperatures and pressures expected for residuum treatment to lead naturally to SCF extraction. 

An advanced version of solvent deasphalting is residuum oil supercritical extraction, or ROSE. The ROSE Process was developed by the Kerr-McGee Corporation and now is offered for license by KBR Engineering and Construction, a subsidiary of Halliburton. In this process, the oil and solvent are mixed and heated to above the critical temperature of the solvent, where the oil is almost totally insoluble. Advantages inelude higher recovery of deasphalted liquids, lower operating costs due to improved solvent recovery, and improved energy efficiency. The ROSE process can employ three different solvents, the choice of which depends upon process objectives Propane Preparation of lube base stocks... 

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