Polyether polyols can be made using Scientific Design’s ethoxylation/ propoxylation process with a few additional process steps. Polyether polyols are a key component of polyurethanes which are used to make rigid and flexible foams, adhesives, sealants, and elastomers.
Scientific Design’s ethoxylation/propoxylation technology has gained worldwide acceptance as a leading design for its safety and productivity. The unique reactor configuration offers numerous advantages over the conventional stirred-tank reactor including less catalyst usage, milder operating conditions and higher reaction rates which all result in improved productivity. In addition, Scientific Design’s equipment improvements allow greater capacity and product range, ensure high quality and excellent color, and result in low by-product and residual ethylene oxide/propylene oxide (EO/PO) content. Over 50 plants have been licensed worldwide.
Process Description: Scientific Design’s polyether polyols design is a batch process in which controlled amounts of catalyzed chain starters are reacted with propylene oxide (PO) and sometimes co-reacted with ethylene oxide (EO) under carefully controlled conditions, each unique to a specific product recipe. This phase of the process is similar to the ethoxylation/propoxylation process. The polyether polyols process requires additional processing steps for neutralization, filtration and solvent recovery. Chain starters can include glycerol, dipropylene glycerol, sorbitol and sucrose, amines and many others.