METHOD OF CREATING RECYCLE IN LIQUID EXTRACTION PROCESS (VERSIONS)

FIELD: chemical engineering. SUBSTANCE: invention can be, in particular, applied in petroleum processing on plants for selective purification of oil fractions with various solvents such as phenol, furfurol, and N-methyl-2-pyrrolidone. Recycle in washing section of multistage extraction system in cou...

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Bibliographic Details
Main Authors ZIGANSHIN G.K, OSINTSEV A.A, ZIGANSHIN K.G
Format Patent
LanguageEnglish
Published 10.02.2000
Edition7
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:FIELD: chemical engineering. SUBSTANCE: invention can be, in particular, applied in petroleum processing on plants for selective purification of oil fractions with various solvents such as phenol, furfurol, and N-methyl-2-pyrrolidone. Recycle in washing section of multistage extraction system in countercurrent extraction of mixture with selective solvent is created by feeding into washing section of extraction system a part of raffinate solution taken off from extraction section of extraction system or part of raffinate obtained after regeneration of solvent from mentioned raffinate solution. EFFECT: increased yield of raffinate and driving force of separation of interacting phases in washing section of extraction system. 2 cl, 8 dwg, 6 tbl
Bibliography:Application Number: RU19970120453