Diethylene Glycol Monolauryl Ether Sodium Sulfate
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(2), 1,4-dioxane generated during preparation: probable carcinogen. However, can be acceptable when concentration of 1,4-dioxane is less than 30ppm or less.
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
1. Synthesis of polyether
Obtain by polymerization reaction of lauryl alcohol and ethylene oxide.
For further information, see:
US patent 4,223,163 Process for making ethoxylated fatty alcohols with narrow polyethoxy chain distribution; US patent 4,967,017 Alcohol ethoxylates of reduced EO content or residual PO content; US patent 5,069,817 Process for making polyoxyethylene surfactants with desirable low temperature behavior etc.
2. Synthesis of sulfate
Lauryl alcohol polyoxyethylene ether and sulfur trioxide react through reactor, then sodium hydroxide neutralizes, finally obtain product.
US patent 8,921,588 (Process for preparing sulfates and/or sulfonates in a micro-reaction system) presents a synthetic process. Conditions: mole ratio of sulfur trioxide and polyethers or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
Quality Standards & Test Methods
1. Physical and chemical indexes
Physical and chemical indexes
High-enriched type
Low-enriched type
Actives, %, ≥
60.0 - 72.0
25.0 - 30.0
pH (25°C, 1% solution)
6.5 - 9.5
6.5 - 9.5
1,4-Dioxane, ppm, ≤