Viscometer
First Claim
Patent Images
1. A method for determining the viscosity of a fluid at a temperature above the normal boiling point of at least one component in the fluid comprising the steps of:
- placing said fluid in a first portion of a viscometer;
pressure sealing said viscometer;
heating said fluid to said temperature;
orienting said viscometer in such a manner that said fluid flows through a capillary tube into a second portion of said viscometer;
measuring the time required for a known volume of said fluid to flow through said capillary tube into said second portion of said viscometer; and
determining the viscosity of said fluid at said temperature based on the time required for a known volume of said fluid to flow through said capillary tube into said second portion of said viscometer.
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Abstract
A capillary tube viscometer is provided in which the viscosity of a fluid can be measured at a temperature above the normal boiling point of at least one component in the fluid. The fluid is heated to the desired temperature in a sealed viscometer which is constructed so as to withstand high pressure. The fluid is then allowed to flow through a capillary tube and the time required for the fluid to flow through the capillary tube is measured. The viscosity of the fluid is then calculated based on the Hagen-Poiseuille law.
52 Citations
9 Claims
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1. A method for determining the viscosity of a fluid at a temperature above the normal boiling point of at least one component in the fluid comprising the steps of:
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placing said fluid in a first portion of a viscometer; pressure sealing said viscometer; heating said fluid to said temperature; orienting said viscometer in such a manner that said fluid flows through a capillary tube into a second portion of said viscometer; measuring the time required for a known volume of said fluid to flow through said capillary tube into said second portion of said viscometer; and determining the viscosity of said fluid at said temperature based on the time required for a known volume of said fluid to flow through said capillary tube into said second portion of said viscometer. - View Dependent Claims (2, 3, 4)
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5. A capillary tube viscometer comprising:
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a first body having a first tubular opening therein; a second body, having a second tubular opening therein, operably coupled to said first body; a partition between said first tubular opening and said second tubular opening; a capillary tube extending from said first tubular opening through said partition to said second tubular opening; a pressure equalization tube extending from said first tubular opening through said partition to said second tubular opening and extending into said first tubular opening a distance sufficient to substantially prevent any fluid in said first tubular opening from flowing through said pressure equalization tube into said second tubular opening; means for introducing a fluid, the viscosity of which is to be determined, into said first tubular opening; means for measuring the time required for a known volume of said fluid to flow through said capillary tube into said second tubular opening; means for heating said fluid in said first tubular opening; means for measuring the temperature of said fluid in said first tubular opening; and means for rotating the coupled said first body and said second body around an axis perpendicular to the longitudinal axis of the coupled said first body and said second body, the coupled said first body and said second body being rotated in such a manner that said first body is above said second body when it is desired to determine the viscosity of said fluid, the coupled said first body and said second body not being rotated in such a manner that said first body is above said second body until said fluid has been heated to a desired temperature, said fluid containing at least one component having a boiling point lower than said desired temperature. - View Dependent Claims (6, 7, 8, 9)
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Specification