Ecolab USA Inc.

Sabic Global Technologies B.v.

Carlo Geijselaers

Fabrice Cuoq

Jerome Vachon

Anthoni Van Zijl

Andrew R Neilson

Russell P Watson

Steven Leen

Sasja Helsen

Disclosed herein are methods for reducing fouling caused by process water present within a water recycling loop of a pyrolysis plant. Fouling is caused by phase separation and accumulation of materials from the process water on equipment surfaces. The method includes applying a total of about 5 ppm to 500 ppm total of a first polymerization inhibitor and second polymerization inhibitor to the process water to form a treated process water, wherein the first polymerization inhibitor has a pygas-water partition coefficient of about 0.0001 to 9 and the second polymerization inhibitor has a pygas-water partition coefficient of about 1000 to 50,000.

Method to inhibit polymerization in a process water

A method of removing material that fouls processing equipment that includes applying a composition comprising N,N-dimethylacetamide (DMAC) to fouling material deposited on the processing equipment to solubilize and remove the fouling material from the processing equipment.

N,N-dimethylacetamide as wash-oil for dilution steam systems

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Eindhoven, Netherlands

Carlo Geijselaers