Monitoring pH in phenol acetone

Details Monitoring pH in phenol acetone Monitoring pH in phenol acetone

1990-09-28

1991-11-19

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204433, 568798, G01N 2726

Patent

active

050663739

ABSTRACT:
Monitoring acidity at the ppm level in phenol-acetone-cumene process streams on a continuous basis is accomplished with a standard hydrogen electrode and a double-junction reference electrode with an external body solution comprising phenol, acetone, water, and a tetraalkyl- or tetraarylammonium salt, which provide a time invariant voltage without the necessity of adding any external solvent to the process stream. Phenol/acetone ratios can be varied from 1:10 to 10:1 which encompass the 1:1 ratio produced by the phenol-acetone process. A direct correlation of the electrode potential with the acidity of the medium is obtained. With the aqueous mixture isolated by a low flow ceramic junction from the process stream, no contamination of the process stream occurs.

REFERENCES:
patent: 4310712 (1982-01-01), Langley
patent: 4447775 (1984-05-01), Breuker et al.
patent: 4490565 (1984-12-01), Chang et al.
patent: 4876397 (1989-10-01), Knifton et al.

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