Topic
Countercurrent exchange
About: Countercurrent exchange is a research topic. Over the lifetime, 2255 publications have been published within this topic receiving 28687 citations. The topic is also known as: Countercurrent exchange.
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TL;DR: In this article, a modified correlation for falling water film evaporation in passive containment was developed for a wall surface temperature range of 71-90 ˚C, and the experimental data showed that the high evapse temperature significantly enhanced evapse.
4 citations
TL;DR: In this article, the authors measured the volumetric gas-liquid mass transfer coefficient (kLa) as a function of liquid flow for five different TLP configurations and found that the mass transfer to the faces of the baskets is in good agreement with values calculated from theoretical models.
4 citations
TL;DR: In this paper, a mathematical model of nonstationary evaporative cooling of a laminar liquid film flowing down a vertical surface in its blowing with a countercurrent steam-air flow has been developed.
Abstract: A mathematical model of nonstationary evaporative cooling of a laminar liquid film flowing down a vertical surface in its blowing with a countercurrent steam-air flow has been developed. The problem of heat and mass transfer has been formulated in a conjugate statement. The calculated data on the time change in the temperature and concentration fields in the steam-air flow and the liquid film as well as in the density of the heat flux on the flowing-film surface have been given.
4 citations
TL;DR: The theory of countercurrent extraction as a criterion of purity is described in this article, and application of the theory fully established the purity of two disperse dyes that had been separated by the countercurrent technique.
Abstract: The theory of countercurrent extraction as a criterion of purity is described. Application of the theory fully established the purity of two disperse dyes that had been separated by the countercurrent technique. The use of the method to show that a mixture of materials is such is discussed. Its limitation with regard to ionic compounds is also discussed.
4 citations
Patent•
05 May 1976
TL;DR: In this paper, a unitary alkylation vessel is presented, consisting of a countercurrent reaction chamber, a settling chamber, another reaction chamber and a final settling chamber with an olefin-acting reactant.
Abstract: An alkylatable reactant is alkylated with an olefin-acting reactant, utilizing a fluid HF catalyst in a countercurrent flow reaction chamber wherein reactants are flowing upward and the fluid catalyst is flowing downward. The fluid catalyst enters the reaction chamber at the top and is withdrawn at the bottom. Reaction chamber effluent passes into a settling chamber wherein it is separated into a catalyst phase and a hydrocarbon phase, the latter passing through a second reaction chamber in which it contacts a countercurrent flow of higher concentration fluid HF catalyst, and into a final settling chamber, wherein a hydrocarbon reaction product phase is separated from a catalyst phase and withdrawn. Also disclosed is a novel unitary alkylation vessel comprising, in combination, a countercurrent reaction chamber, a settling chamber, a second reaction chamber, and a final settling chamber.
4 citations