Difficult Liquid-Liquid Separations High-performance, polymer-fiber coalescers break up hard-to-handle emulsions and dispersions

Common sources of contamination in chemical and petrochemical processes are liquid-liquid extraction. These often happen where mixing of solvent and feed is needed to optimize extraction efficiency, but results in solvent carryover into an extract or raffinate. Large amounts of solvent can be carrie...

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Bibliographic Details
Published inChemical engineering (New York) Vol. 104; no. 12; p. 104
Main Authors Thomas H. Wines, Pall Corp. Robert L. Brown, Kim, Irene
Format Magazine Article
LanguageEnglish
Published New York Access Intelligence LLC 01.12.1997
Subjects
Adsorption
Applications
Charged particles
Chemical engineering
Chemicals
Contamination
Density
Fluids
Gravity
Hydrocarbons
Organic chemicals
Process controls
Solvents
Surfactants
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Summary:Common sources of contamination in chemical and petrochemical processes are liquid-liquid extraction. These often happen where mixing of solvent and feed is needed to optimize extraction efficiency, but results in solvent carryover into an extract or raffinate. Large amounts of solvent can be carried over into product streams in process units running at rates above design capacity, for example. Carried-over liquid causes off-specification products and excessive solvent losses, and, often, operating problems in downstream processes. If water is present in process fluid, it can form stable emulsions that can cause off-specification products. The liquid-liquid coalescer system consists of three stages: prefilter, coalescer and separator. The prefilter stage is generally a separate vessel with filter cartridges. The coalescing and separator stages can be configured vertically or horizontally.
ISSN:0009-2460
1945-368X