Method and apparatus for the control of pitch still operation

Details Method and apparatus for the control of pitch still operation Method and apparatus for the control of pitch still operation

1975-07-30

1978-01-03

Yudkoff, Norman

Mineral oils: apparatus

Vaporizing

Automatic control

73344, 203 2, B01D 342

Patent

active

040661598

ABSTRACT:
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.

REFERENCES:
patent: 1639057 (1927-08-01), Peabody
patent: 2473765 (1949-06-01), Platts
patent: 2711750 (1955-06-01), Norcross
patent: 3025232 (1962-03-01), Jones
patent: 3184396 (1962-05-01), Armstrong
patent: 3742755 (1973-07-01), Smith

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