PURPOSE: To operate easily an extraction tower at the max. passing quantity by monitoring the extract of a liq.-liq. extraction tower by an on-line turbidity analyzer and modifying tower operation when a sample temp. is equal to or above the temp. of the tower bottom and the presence of two phases is recognized.
CONSTITUTION: A raw material filler is supplied to an extraction tower 2 through a line 1 and a solvent is supplied to the upper part of the extraction tower 2 through a line 3. An extraction residue phase is recovered through a line 4 and sent to a recovery apparatus 5 to remove the solvent through a line 6 and is recycled to the extraction tower 2 through the line 3. The extraction residue in which the solvent is removed is recovered through a line 7, an extraction phase is recovered from the tower 2 through a line 8. A first temp. detector TD1 for measuring the tower bottom temp. is installed in the line 8, a sample of a slide current is constantly taken out from the line 8 through a line 9 to send it to a circuit 10 of the analyzer system. When the temp. of the sample is equal to or above the temp. of the tower bottom and an extraction sample is detected in a second phase and the presence of carryunder is measured, correcting means is started to correct an extraction condition of the extraction tower 2.
GOODON KONRATSUDO KAMANO
RANDOORU SUTEFUAN RACHIINU
HOWAADO RATSUSERU RINGUREI
REIMONDO DABURIYU SAUNDAASU
