Wells – Processes – With indicating – testing – measuring or locating
Patent
1988-03-07
1989-10-03
Suchfield, George A.
Wells
Processes
With indicating, testing, measuring or locating
166303, 166307, 166902, 122459, 210696, E21B 4324, E21B 4327, E21B 4700
Patent
active
048710237
ABSTRACT:
A method for controlling pH in the liquid and vapor phases of wet steam having such phases formed in a steam generator system from feedwater having therein at least one carbonate species which in the presence of steam forms a vapor phase component tending to lower the pH of the vapor phase of the steam upon condensation and a liquid phase component tending to raise the pH of the liquid phase of the steam, comprising: (a) converting the feedwater in a steam generation system to steam having a vapor phase and a liquid phase; and (b) adding to the steam generation system, a compound, selected from the group of phosphorus, arsenic, antimony, and bismuth containing compounds which are capable of forming a nonvolatile anionic component and a cationic component that, in the presence of the steam, yields hydrogen ions for reducing the pH of the liquid phase of the steam and an alkaline component for increasing the pH of the vapor phase of said steam upon condensation.
REFERENCES:
patent: 3367417 (1988-02-01), McCabe
patent: 3817859 (1974-06-01), Tate
patent: 4454917 (1984-06-01), Poston
patent: 4572296 (1986-02-01), Watkins
patent: 4580633 (1986-04-01), Watkins et al.
patent: 4714112 (1987-12-01), Nigrini et al.
patent: 4719972 (1988-01-01), Hsueh
Hwang Rong J.
Nigrini Andrew
Chevron Research Company
Keeling E. J.
Suchfield George A.
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