Composition for controlling clathrate hydrates and a method for controlling clathrate hydrate formation
AssigneesRF-Procom A/S, Nippon Shokubai Co., Ltd.
InventorsMalcolm Andrew Kelland, Mark Rodger, Takashi Namba
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Abstract
A polymer composition useful for controlling the formation, growth and/or agglomeration of clathrate hydrate comprising two different polymers, designated Polymer x and Polymer y respectively, characterized in that Polymer x is a material whose In(WBF) is greater than that of Polymer y, which satisfy the following conditions: a) In(WBF) of x-In(WBF) of y is greater than 3 and b) the Synergism Index is greater than 0.05.
Claims7
A polymer composition useful for controlling the formation, growth and/or agglomeration of clathrate hydrate comprising two different polymers, designated Polymer x and Polymer y respectively, characterized in that Polymer x is a material whose In(WBF) is greater than that of Polymer y, which satisfy the following conditions:
- a) In(WBF) of x-In(WBF) of y is greater than 3 and b) the Synergism Index, defined by the following equation, is greater than 0.05:
- I ( x , y ) = { ln ( WBF ( x ) ) / Dp ( x ) 0.5 } · Ph ( x ) · C ( x ) 2 { ln ( WBF ( y ) ) / Dp ( y ) 0 , 5 } · Ph ( y ) · C ( y ) 2
- where I(x,y) is the parameter
- Dp(i) is the degree of polymerization of the Polymer I
- Ph(i) is the hydrophilicity factor of the Polymer i defined by the following equation:
- Ph = bp ( H2O ) at760mmHg [ K . ] Tcloud [ K . ]
- where bp(H20) is the boiling point of water in K
- Tcloud is the cloud point in 1 wt % solution in distilled water of a polymer of a structure corresponding to either Polymer x or y when its molecular weight is over 10,000
- C(i) is the concentration of the Polymer i,
- where i is x or y.
Dependencies are inferred from the claim text.