Water treatment process for reducing the hardness of an oilfield

Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...

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210724, 210726, 210737, C02F 152

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058795626

ABSTRACT:
A multi-stage process is provided for treating a water to reduce its hardness. The feed water is initially heated to a thermal reaction temperature in a heating stage. The heated water is then maintained at or near the thermal reaction temperature for a sufficient residence time to thermally react the water, producing a first portion of a scale from the scale-forming ions in the water while discharging dissolved gases from the water. After the thermal reaction stage, one or more chemical additives in the form of a hydroxide ion donor and optionally a bicarbonate ion donor are added to the heated water in a chemical reaction stage. The chemical additive is chemically reacted with the water in the chemical reaction stage, producing a second portion of the scale from the scale-forming ions in the water. A treated water having a reduced hardness is recovered from a sludge settling stage and the scale produced by the thermal and chemical reaction stages is discharged from the water and accumulated in a sludge accumulation stage for withdrawal from the process.

REFERENCES:
patent: 2401924 (1946-06-01), Goetz
patent: 2999809 (1961-09-01), Eigner et al.
patent: 3026261 (1962-03-01), Mayfield et al.
patent: 3839199 (1974-10-01), Weiss et al.
patent: 4018656 (1977-04-01), Rogers et al.
patent: 4029576 (1977-06-01), Shivers
patent: 4035293 (1977-07-01), Benoit et al.
patent: 4036749 (1977-07-01), Anderson
patent: 4336232 (1982-06-01), Moritz
patent: 4366066 (1982-12-01), Rogers et al.
patent: 4518505 (1985-05-01), Lim et al.
patent: 4663054 (1987-05-01), O'Connell et al.
patent: 4724085 (1988-02-01), Pohoreski
patent: 4877536 (1989-10-01), Bertness et al.
patent: 5075007 (1991-12-01), Morper et al.
patent: 5609765 (1997-03-01), Bowman

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