liquid - liquid extraction of Benzoic acid
We were asked to extract benzoic acid from a kerosene-benzoic acid mixture. This was to be done using the stirred liquid-liquid extraction column in the senior laboratory. Fresh water was used as the continuous phase in the extraction. We were asked to measure the benzoic acid concentrations of the feed, raffinate, and extract streams. These measurements were to be made at several different steady-states. The number of theoretical stages and the height of the theoretical stages (HETS) was also to be determined. Because the liquid-liquid extraction column had not been used in several years our assignment also included discussing any problems with the process and possible solutions. The discussion of equipment, results, and experimental procedure will be discussed in the following paper entitled "Liquid-Liquid Extraction."Even though the process had not been used in several years, everything worked very well. The flow meter used to measure the water flow rate had a small leak which was easily remedied using a bucket. One of the storage tanks still had approximately 400 liters of kerosene with a benzoic acid concentration of 0.00208 (gm/mL). Using this as a feed for the process, concentrations of benzoic acid in the aqu
1. pH vs. BENZOIC ACID CONCENTRATION Allerton, J., "Liquid Extraction in Perforated-Plate and Packed Towers." American Institute of Chemical Engineers. 39:361-384 (1943). Because the process had not been used in several years we first looked the equipment over to determine how it worked. The basic process consisted of an extraction column, four storage tanks, and a pump. The column itself contained 10 stages with impellers between each stage. The impeller speed was set to 360 revolutions per minute. This impeller speed was chosen purely at random. The top of the column contains an inlet for the water and a outlet for the raffinate. Conversely the bottom of the column consisted of an outlet for the extract and an inlet for the kerosene feed. Both of the inlets came directly from pumps which pulled the kerosene feed and the water from there respective storage tanks. The outlets were piped directly to the raffinate and extract storage tanks. The piping was designed such that there is a place to take samples from each of the pipes entering and exiting storage tanks.
Some common words found in the essay are:
HETS Benzoic, Liquid-Liquid Extraction, Perry's Handbook, Introduction Liquid-liquid, Benzoic Acid, Theory Liquid-liquid, , Results Conclusion, Engineering Handbook, Ys Concentration, benzoic acid, theoretical stages, liquid-liquid extraction, acid concentration, kerosene feed, equivalent theoretical, height equivalent theoretical, equivalent theoretical stages, height equivalent, benzoic acid concentration, extraction column, equilibrium curve, feed kerosene, liquid-liquid extraction column, theoretical stages hets,
Approximate Word count = 2139
Approximate Pages = 9 (250 words per page double spaced)
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