This inventor holds 9 USPTO granted patents, plus 1 CIPO patent and 1 EPO patent. Top assignee: Lummus Technology Inc.. Active years: 2012-2018.
Company Filing History:
Years Active: 2012-2018
Title: The Innovative Contributions of Stephen De Haan
Introduction
Stephen De Haan is a notable inventor based in Wayne, NJ (US). He has made significant contributions to the field of chemical engineering, particularly in processes related to the recovery of olefins. With a total of 9 patents to his name, De Haan's work has had a considerable impact on the industry.
Latest Patents
One of his latest patents is focused on the recovery of ethylene from methanol to olefins process. This innovative method involves initially feeding the effluent from a methanol to olefins reactor to an absorber demethanizer. The process allows for the recovery of overheads, including methane and ethylene, and bottoms that contain the absorbent, ethylene, and ethane. The bottoms are then separated to recover both an ethylene fraction and an ethane fraction. The overheads are cooled and partially condensed in a heat exchanger to a temperature of -40°C or greater. The resulting stream may be further cooled and condensed using a mixed refrigerant to a temperature below -40°C. The non-condensed vapors are separated from the condensed liquids, forming a liquid fraction and a methane fraction. The liquid fraction is fed back to the absorber demethanizer as reflux, while the methane and ethane fractions are combined to create the mixed refrigerant.
Another significant patent by De Haan is related to the methanol to olefins process. This process involves chilling ethylene to the required storage temperatures. It includes cooling an ethylene product from an ethylene production or recovery process through indirect heat exchange with a coolant at temperatures below -100°C. This method decreases the temperature of the ethylene product and involves mixing a portion of the cooled ethylene product with methane to form the coolant. The process also includes expanding the coolant, methane, and cooled ethylene to reduce the coolant's temperature before cooling.
Career Highlights
Stephen De Haan is currently employed at Lummus Technology Inc., where he continues to innovate and develop new processes in the chemical engineering sector. His expertise and contributions have been instrumental in advancing technologies related to olefin recovery and production.
Collaborations
Throughout his career, De Haan has collaborated with several professionals in the field, including Peter Daniel Kuzma, Jr. and Stephen J. Stanley. These collaborations have further