Process for removal of silica from geothermal brine

Details Process for removal of silica from geothermal brine Process for removal of silica from geothermal brine

1975-03-17

1977-04-05

Vertiz, Oscar R.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

423127, 423144, 423629, 423632, B01D 2100

Patent

active

040160750

ABSTRACT:
Ammonium hydroxide is added to a mixture of high-temperature, high-pressure geothermal steam and brine to raise the pH of the brine to between 6.0 and 7.0 and precipitate out a gelatinous sludge of aluminum and iron hydroxides. The hydroxide sludge is suspended in the brine and sweeps out enough dissolved silica so that the temperature and pressure of the brine can be reduced with little, if any, formation of silica scale. Various metals and ammonium hydroxide may then be recovered from the brine, the ammonium hydroxide being recycled in the process.

REFERENCES:
patent: 1964161 (1934-06-01), Kuhnert
patent: 1992532 (1935-02-01), Kuhnert
patent: 2148520 (1939-02-01), Windecker
patent: 2194524 (1937-03-01), Lindsay et al.
patent: 2768063 (1956-10-01), Domicone
patent: 2781244 (1957-02-01), Hecklinger

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