Method for blending a gas into a high viscosity liquid
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United States of America Patent
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Jan 2, 1996
Grant Date -
N/A
app pub date -
Sep 22, 1994
filing date -
Sep 28, 1993
priority date (Note) -
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Abstract
The objectives of the present invention are achieved by preparing a foamable composition comprising a viscous liquid and a gas homogeneously dispersed in the liquid. The compositions are prepared by blending a pressurized gas with the viscous liquid in a mixing chamber. In accordance with the present method the flow rate of the pressurized gas into the mixing chamber is controlled as a function of the flow rate of at least one high viscosity liquid into said chamber. The apparatus includes a means for controlling the flow rate of the pressurized gas as a function of either the difference in the feed pressures of said gas and said liquid or a predetermined ratio of the volumes of liquid and gas present in said mixing chamber.
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