Project #1
To determine optimum conditions and materials to clean stainless steel surfaces contaminated with polyurethane.
02/02/1996
Simulation of chemical reactor walls and mixing blades. We propose to the use of small stainless steel parts to simulate reactor walls.
Small
Less than 1 lb
drumming of product
polymerization of polyurethane
15
N Methyl 2 Pyrrolidone
N-pyrollidone will become a listed chemical. Costs
The reactor must be cleaned of residual polymer solvents and compounding ingredients prior to the start of the next polymerization
Used Immediately
used for next polymerization
measure weight of dried polymer removed
The lab found two possible cleaning solutions, Tsquare HTF 85 B and US Polychem 69 MC. Pilot scale testing of the 69 MC yielded inadequate dissolving of the coating. HTF 85 B was as effective as the NMP.