A Liquid Absorbent for In-Process Recycling of Ethylene from Purge Streams

EPA Contract Number: 68D98142
Title: A Liquid Absorbent for In-Process Recycling of Ethylene from Purge Streams
Investigators: Lyon, David
Small Business: Bend Research Inc.
EPA Contact: Manager, SBIR Program
Phase: I
Project Period: September 1, 1998 through March 1, 1999
Project Amount: $70,000
RFA: Small Business Innovation Research (SBIR) - Phase I (1998) RFA Text |  Recipients Lists
Research Category: SBIR - Pollution Prevention , Pollution Prevention/Sustainable Development , Small Business Innovation Research (SBIR)


Ethylene surpasses all other organic petrochemicals in production volume and is the primary raw material in a variety of synthetic organic chemical products. The largest use of ethylene is in the production of various forms of polyethylene. Annual domestic polyethylene production is about 20 billion pounds.

In the polyethylene polymerization process, about 1-2% of the ethylene feed is purged from polyethylene reactors to minimize accumulation of inert feed-stream impurities. In- process recycling reuse of a potential waste within existing operations will reduce discharges to the environment and conserve raw materials, which reduces the environmental impact of their production.

Under this SBIR project, Bend Research will develop an efficient, in-process recycle technology for recovering ethylene from purge streams. The Phase I goal is to demonstrate the feasibility of a transition-metal-based liquid absorbent that would allow for selective separation of ethylene from a purge stream via ethylene complexation.

Supplemental Keywords:

small business, SBIR, pollution prevention, engineering, chemistry, EPA., Scientific Discipline, Water, Sustainable Industry/Business, cleaner production/pollution prevention, Chemistry, Technology for Sustainable Environment, New/Innovative technologies, Engineering, Engineering, Chemistry, & Physics, polyethylene, in-process recycling, waste reduction, in process recycling, liquid absorbent, recycling, innovative technology, innovative technologies

Progress and Final Reports:

  • Final Report