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Environmentally friendly products and processes

We need to use energy and resources, which are in limited supply, to manufacture chemical products. In the production process, unneeded substances (byproducts) or waste may also be generated. Sumitomo Chemical is pursuing Green Processes, which minimize the environmental impact of manufacturing to the greatest extent possible, and developing Clean Products, which are safer, more environmentally friendly, and of higher quality.

EPL 3 Process for Polarizer

In the EPL 3, one of the lamination processes of optical films has been dramatically changed, and compared with the conventional method, energy consumption can be substantially reduced. Moreover the prior processing is no longer necessary basically, which leads to the reduction of environmental impact. The EPL 3 process represents a next-generation environment-friendly manufacturing method.

Proprietary Propylene Oxide-Only Process (PO-Only Process)

In the propylene oxide-only process, propylene oxide can be manufactured without byproducts by recycling cumene. Furthermore, this process helps conserve energy and resources by the effective use of the heat generated by reactions, and produces less wastewater. In addition, the facilities used for the process are more compact than those used for conventional processes, enabling high cost competitiveness.

Caprolactam (Beckmann Rearrangement) Process

In the caprolactam (Beckmann rearrangement) process, caprolactam can be manufactured without producing the byproduct ammonium sulfate. This process also allows for a significant reduction in the amount of raw materials used as well as a shortened manufacturing process. In addition, it uses a safer catalyst.

Hydrochloric Acid Oxidation Process

In the hydrochloric acid oxidation process, hydrochloric acid generated as a byproduct in the manufacture of chemical products is recycled through conversion to chlorine using a catalyst and oxygen. This process is considerably more energy-efficient than conventional processes.

CO2 Separation Process

CO2 separation technology is used to remove CO2 from raw material gases, primarily in the manufacture of hydrogen and the refining of natural gas. Membrane technology for CO2 removal currently being developed by Sumitomo Chemical has many features compared with existing chemical absorption technology , including a simpler process enabling huge reductions in energy consumption, as well as miniaturization enabling facilities size less than half.