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Flaked soybeans are to be leached with hexane to remove the soybean oil. Following experimental data is reported: wt% oil in solution kg solution retained/kg insoluble solid 20 0.66 30 0.58 0.70 The soybean flakes enter containing 20% oil and are to be leached to 0.5% (on a solvent- free basis). The net forward flow of the solvent is to be 1.0 kg hexane introduced as fresh solvent per kg flakes, and the fresh solvent is free of oil. The solvent draining from the flakes is generally free of solid except in the first stage: the rich extract contains 10% of the insoluble solid in the feed as a suspended solid. Determine the number of stages required to perform the desired leaching.

Flaked soybeans are to be leached with hexane to remove the soybean oil. Following experimental data is reported: wt% oil in solution kg solution retained/kg insoluble solid 20 0.66 30 0.58 0.70 The soybean flakes enter containing 20% oil and are to be leached to 0.5% (on a solvent- free basis). The net forward flow of the solvent is to be 1.0 kg hexane introduced as fresh solvent per kg flakes, and the fresh solvent is free of oil. The solvent draining from the flakes is generally free of solid except in the first stage: the rich extract contains 10% of the insoluble solid in the feed as a suspended solid. Determine the number of stages required to perform the desired leaching.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Flaked soybeans are to be leached with hexane to remove the soybean oil. Following experimental data is reported: wt% oil in solution 20 30 kg solution retained/kg insoluble solid 0.58 0.66 0.70 The soybean flakes enter containing 20% oil and are to be leached to 0.5% (on a solvent- free basis). The net forward flow of the solvent is to be 1.0 kg hexane introduced as fresh solvent per kg flakes, and the fresh solvent is free of oil. The solvent draining from the flakes is generally free of solid except in the first stage: the rich extract contains 10% of the insoluble solid in the feed as a suspended solid. Determine the number of stages required to perform the desired leaching.
Transcribed Image Text:Flaked soybeans are to be leached with hexane to remove the soybean oil. Following experimental data is reported: wt% oil in solution 20 30 kg solution retained/kg insoluble solid 0.58 0.66 0.70 The soybean flakes enter containing 20% oil and are to be leached to 0.5% (on a solvent- free basis). The net forward flow of the solvent is to be 1.0 kg hexane introduced as fresh solvent per kg flakes, and the fresh solvent is free of oil. The solvent draining from the flakes is generally free of solid except in the first stage: the rich extract contains 10% of the insoluble solid in the feed as a suspended solid. Determine the number of stages required to perform the desired leaching.
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