Regenerator bottoms from hydrogen fluoride (HF) alkylation are often 2-phase systems. The lower phase is relatively rich in HF, containing about 30-40%; and the upper phase is essentially hydrocarbon containing small concentrations (about 0-5%) of HF. The water content of the HF-rich lower phase is usually less than 10%, and that of the upper phase is usually less than 5%. This method is satisfactory for the determination of water in both types of samples. The unsaturates present in the oil do not interfere in the titration for water.
Citing ASTM Standards
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