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US 4,066,159 AGranted
Method and apparatus for the control of pitch still operation
AssigneeKoppers Company, Inc.
InventorGeorge R. Romovacek
Life of this patent
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AssigneeKoppers Company, Inc.
InventorGeorge R. Romovacek
Estimating the term…
A method for controlling pitch still operations is disclosed comprising measuring the temperature of a sample of pitch from the still at a preselected viscosity value, comparing the measured temperature with a predetermined temperature value, and adjusting the parameters of the still operation in response to the comparison. An apparatus for carrying out the method is also disclosed comprising a means for withdrawing and returning a sample of pitch from the reactor, a chamber for holding the sample of pitch, the chamber having a means for heating and cooling the sample, a temperature sensing device and a viscosity measuring device located in the chamber, and a means for recording the temperature value when the viscosity has reached a predetermined value. Optionally and preferably, the apparatus has a means for comparing the temperature value measured when the viscosity has reached the preselected value with the predetermined temperature value and adjusting the parameters of the pitch production in response thereto.
An apparatus for controlling the operation of a pitch still reactor comprising a means for removing a sample of pitch from the pitch still reactor, a sample chamber for holding a sample of the pitch, a means for heating the sample, a temperature sensing means and viscosity sensing means located within the chamber that cooperate to measure the temperature when the viscosity it at a preselected value and means for comparing the measured temperature with a predetermined value and controlling the parameters of the reaction in response to the comparison.
Dependencies are inferred from the claim text.