Mineral oils: processes and products – Fractionation – Liquid extraction with solvents
Patent
1985-02-27
1986-09-02
Metz, Andrew H.
Mineral oils: processes and products
Fractionation
Liquid extraction with solvents
208DIG1, 203 3, 210 97, C10G 2102
Patent
active
046094571
ABSTRACT:
Method of operation for a continuous countercurrent extraction zone, to which a charge mixture stream and a solvent stream are continuously supplied and from which an extract stream and a raffinate stream are continuously withdrawn. In one embodiment, the method comprises establishing a recycle stream consisting of a portion of the light phase stream withdrawn from the column, combining the recycle stream with the charge mixture stream, and controlling the streams flowing to and from the column. The combined feed stream to the extraction zone is controlled at a constant flow rate and recycle flow has preference over charge mixture flow, thereby causing charge stream flow to vary inversely with recycle flow. An important feature of the invention resides in adjustment of composition of this total combined feed stream to the extraction zone in order to deal with fluctuations in other parameters. The effects of fluctuations in flow rates and compositions of streams entering and leaving an extraction zone are mitigated, resulting in increased efficiency.
REFERENCES:
patent: 2336205 (1943-12-01), Willauer
patent: 2367671 (1945-01-01), Dickinson et al.
patent: 2474006 (1949-06-01), Maycock
patent: 2609277 (1952-09-01), McNamara
patent: 2729549 (1956-01-01), Reman
patent: 2776329 (1957-01-01), Mayeux, Jr.
patent: 3037062 (1962-05-01), Gerhold
patent: 3433735 (1969-03-01), Broughton
patent: 3435087 (1969-03-01), Broughton
patent: 3443692 (1969-05-01), Halsey
patent: 3470088 (1969-09-01), Vickers
patent: 3546107 (1970-12-01), Brown et al.
patent: 3558480 (1971-01-01), Broughton
patent: 3642614 (1972-02-01), Van Tassell
patent: 3864245 (1975-02-01), Van Tassell
patent: 4201626 (1980-05-01), Asdigian
patent: 4305907 (1981-12-01), Baird
John H. Perry, Chemical Engineers' Handbook, 4th edition, McGraw-Hill, pp. 14-40, through 14-43.
Caldarola Glenn A.
Cordovano Richard J.
McBride Thomas K.
Metz Andrew H.
Spears Jr. John F.
LandOfFree
Operation of continuous extraction process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Operation of continuous extraction process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operation of continuous extraction process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1096110