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A solvent dewaxing unit in an oil refinery is separating 5000 bbl/day of a lubricating distillate into 23 vol percent of slack wax and 77 vol percent of dewaxed oil. The charge is mixed with solvent, chilled, and filtered into wax and oil solution streams. The solvent is then removed from the two streams by two banks of stripping columns, the bottoms from each column in a bank being charged to the next column in the bank. The oil bank consists of four columns, and the wax bank of three. A test on the charge and bottoms from each column gave the following results: percent solvent by volume no. 2 bottoms no. 1 bottoms 70 no. 3 bottoms 4.0 to 1st column no. 4 bottoms Pressed Oil 83 27 0.8 Wax 83 71 23 0.5 ---- Calculate the barrels of solvent lost per day (in bottoms from last column of each bank). Express your answer into two significant figures.

A solvent dewaxing unit in an oil refinery is separating 5000 bbl/day of a lubricating distillate into 23 vol percent of slack wax and 77 vol percent of dewaxed oil. The charge is mixed with solvent, chilled, and filtered into wax and oil solution streams. The solvent is then removed from the two streams by two banks of stripping columns, the bottoms from each column in a bank being charged to the next column in the bank. The oil bank consists of four columns, and the wax bank of three. A test on the charge and bottoms from each column gave the following results: percent solvent by volume no. 2 bottoms no. 1 bottoms 70 no. 3 bottoms 4.0 to 1st column no. 4 bottoms Pressed Oil 83 27 0.8 Wax 83 71 23 0.5 ---- Calculate the barrels of solvent lost per day (in bottoms from last column of each bank). Express your answer into two significant figures.

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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A solvent dewaxing unit in an oil refinery is separating 5000 bbl/day of a lubricating distillate into 23 vol percent of slack wax and 77 vol percent of dewaxed oil. The charge is mixed with solvent, chilled, and filtered into wax and oil solution streams. The solvent is then removed from the two streams by two banks of stripping columns, the bottoms from each column in a bank being charged to the next column in the bank. The oil bank consists of four columns, and the wax bank of three. A test on the charge and bottoms from each column gave the following results: percent solvent by volume no. 2 bottoms no. 1 bottoms 70 no. 3 bottoms 4.0 to 1st column no. 4 bottoms Pressed Oil 83 27 0.8 Wax 83 71 23 0.5 ---- Calculate the barrels of solvent lost per day (in bottoms from last column of each bank). Express your answer into two significant figures.
Transcribed Image Text:A solvent dewaxing unit in an oil refinery is separating 5000 bbl/day of a lubricating distillate into 23 vol percent of slack wax and 77 vol percent of dewaxed oil. The charge is mixed with solvent, chilled, and filtered into wax and oil solution streams. The solvent is then removed from the two streams by two banks of stripping columns, the bottoms from each column in a bank being charged to the next column in the bank. The oil bank consists of four columns, and the wax bank of three. A test on the charge and bottoms from each column gave the following results: percent solvent by volume no. 2 bottoms no. 1 bottoms 70 no. 3 bottoms 4.0 to 1st column no. 4 bottoms Pressed Oil 83 27 0.8 Wax 83 71 23 0.5 ---- Calculate the barrels of solvent lost per day (in bottoms from last column of each bank). Express your answer into two significant figures.
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