Method for controlling and cooling a distillation column
OwnerFrank Bahrinventor
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for controlling, manually or automatically, the composition or quality of one or more products removed from the head, the sump or a lateral removal point of the distillation column having a built-in heat-exchanger. The method is characterized in that, by changing the pressure in the column, in the region of the product removal, the new boiling temperature of the product is determined from the vapor pressure curve of the product at said pressure and the temperature of the distillation removal is adjusted to said new boiling temperature by means of the modified coolant flowing through the heat-exchanger, preferably in the counter direction.
Claims12
A method for manually or automatically controlling at least one of composition and quality of one or more products withdrawn from the top, bottom or side offtake of a distillation column with a built-in heat exchanger, wherein when the pressure in the column is changed in the region of product withdrawal, then the new boiling temperature of the product at this pressure is determined from the vapor-pressure curve of the product, and the temperature of the distillate withdrawal is set at this new boiling temperature, comprising:
- installing the heat exchanger in the distillation column;
- and
- setting the temperature of the distillate withdrawal at the new boiling temperature by means of a changed flow of a cooling medium through the heat exchangers, until the temperature in the column in the region of product withdrawal has reached the new setpoint as determined from the vapor-pressure curve, wherein the cooling medium outer is in the bottom of the distillation column, or the cooling medium is conducted through a bottom medium.
Dependencies are inferred from the claim text.