High fluidity liquid for pipelining solids

Details High fluidity liquid for pipelining solids High fluidity liquid for pipelining solids

1973-11-23

1976-04-13

Guynn, Herbert B.

Cutlery

137 13, 252308, 252309, 252312, B65G 5304

Patent

active

039500349

ABSTRACT:
An improved method of pipelining solids is effected by suspending the solids in a liquid containing lamellar micelles and pumping the mixture at flow rates predetermined to produce retro-viscous behavior in the liquid at noncryogenic temperatures. The liquid is a composition containing 4-15% surfactant (preferably petroleum sulfonate having an average equivalent weight of 350-525), and at least two substantially immiscible liquids (e.g. 30-70% liquid hydrocarbon and 15-66% water) and optionally up to 20% cosurfactant (preferably an alcohol containing 1-20 carbon atoms) and/or electrolyte (preferably inorganic salt). The micelles have an axial ratio of at least 3.5. Preferably, the composition has a viscosity of at least 75 cp at a shear rate of 10.sup.-.sup.1 seconds at 23.degree.C. The composition is substantially optically clear, phase stable, birefringent, and the flow properties are such that substantially large increases in flow rates, e.g. 20-fold, can be realized at very small pressure increases, e.g. 5%. Concentration of the solids can be up to about 60% by weight of the composition.

REFERENCES:
patent: 3254714 (1966-06-01), Gogarty et al.
patent: 3264038 (1966-08-01), Shock et al.
patent: 3275075 (1966-09-01), Gogarty et al.
patent: 3341256 (1967-09-01), Adams
patent: 3477511 (1969-11-01), Jones et al.
patent: 3617095 (1971-11-01), Lissant
patent: 3822746 (1974-07-01), Gogarty

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