1
James N Sorensen: Propane recovery process. McDermott Engineers & Constructors, Daniel S Kalka, Robert J Edwards, November 11, 1997: US05685170 (51 worldwide citation)

Increased recovery of propane, butane and other heavier components found in a natural gas stream is achieved by installing an absorber upstream from an expander and a separator. The separator is downstream from the expander and returns the liquid stream generated by the separator back to the absorbe ...


2
James N Sorensen: Ethane recovery process. McDermott Engineers & Constructors, Daniel S Kalka, Robert J Edwards, September 21, 1999: US05953935 (25 worldwide citation)

An improved ethane recovery system and process which increases the recovery of ethane up to about 99% with no increase in plant residue compression horsepower. The improved ethane recovery process employs an additional fractionation column which receives two vapor streams in different regions thereo ...


3
James N Sorensen: Heat integrated distillation. Birch Stewart Kolasch & Birch, July 11, 2002: US20020088701-A1

A heat integrated distillation column provides heat at each theoretical stage of distillation in a heating portion and coolant at each theoretical stage of distillation in a cooling portion.