When producing SLES, the sulfate is neutralized with pure water, caustic soda, hydrogen peroxide (H₂O₂) and a buffer in the neutralization reactor, where all ingredients are brought to reaction by high-shear mixing. Dioxane is then stripped out together with air in the stripping tower under vacuum, while cooling is also carried out in the same tower.   Features: Compared with other vacuum-neutralization process, the WEIXIAN stripping tower is a static unit with no motor and requires no maintenance. The product is reacted in a micro-positive-pressure reactor before entering the stripping tower, so that no acid-gas corrosion occurs in the condensate or the vacuum pump. The unit also incorporates a ten-times SLES recycle loop. Compared with similar technologies from other suppliers, this process keeps the neutralization temperature rise below 5 °C, yielding products with a lighter color, a more stable pH and lower dioxane content. The unit can achieve ultra-low dioxane levels.