Method to decrease iron sulfide deposits in pipe lines
OwnerMark Andrew Mattoxinventor
Life of this patent
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Abstract
This invention provides a method of treating a dry or processed fluid pipe line susceptible to the build-up of iron sulfide deposits by complexing the iron sulfide in the pipe lines. The method of the present invention introduces the composition on a continuous or a batch basis to a gas pipe line. The composition is made of a solution of 1) water, 2) [tetrakis(hydroxymethyl)phosphonium]sulfate or chloride, and 3) a soluble ammonium salt, such as ammonium chloride or the like.
Claims12
A method of cleaning a dry gas pipe line susceptible to the build up of iron sulfide deposits by complexing iron sulfide found in said dry gas pipe lines, the method comprising:
- (a) adding to said dry gas pipe line a composition obtained by combining the constituents consisting essentially of:
- water, 5% (w/w) (tetrakis(hydroxymethyl)phosphonium)sulfate, and 0.5% (w/w) of a soluble ammonium salt, and
- (b) complexing said iron sulfide with said composition in said dry gas pipeline.
A method of cleaning a dry gas pipe line of iron sulfide deposits by complexing iron sulfide found in said dry gas pipe lines, the method comprising:
- (a) adding to said dry gas pipeline a composition obtained by combining the constituents consisting essentially of:
- water, 5% (w/w) (tetrakis(hydroxymethyl)phosphonium)chloride, and 0.5% (w/w) of a soluble ammonium salt, and
- (b) complexing said iron sulfide with said composition in said dry gas pipeline.
A method of cleaning an oil pipe line of iron sulfide deposits by complexing iron sulfide found in said oil pipe line, the method comprising:
- (a) adding to said oil pipe line a composition obtained by combining the constituents consisting essentially of:
- water, 5% (w/w) (tetrakis(hydroxymethyl)phosphonium)sulfate and 0.5% (w/w) of a soluble ammonium salt, and
- (b) complexing said iron sulfide with said composition in said oil pipeline.
A method of cleaning an oil pipe line of iron sulfide deposits by complexing iron sulfide found in said oil pipe line, the method comprising:
- (a) adding to said oil pipeline a composition obtained by combining the constituents consisting essentially of:
- water, 5% (w/w) (tetrakis(hydroxymethyl)phosphonium)chloride and 0.5% (w/w) of a soluble ammonium salt, and
- (b) complexing said iron sulfide with said composition in said oil pipeline.
Dependencies are inferred from the claim text.