Branched Dodecylbenzene Sulfonate Sodium Salt
time:2012-09-28 16:24:16,count:0
Characteristics    excellent cleansing, foaming, emulsifying, wetting, dispersing, solubilizing abilities. Weak resistance to hard water, used in conjunction with chelating agent. Good compatibility.
Note    (1), Hardly biodegradable. Avoid to use if possible.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, branched dodecylbenzene and sulfur trioxide react through reactor, then sodium hydroxide or sodium carbonate 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 alkyl benzenes or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Appearance
Actives, %
pH (25°C, 1%)
20 type
pale transparent liquid; or solid
20±2
7.5 - 11.0
30 type
liquid; or solid
30±2
7.5 - 11.0
40 type
liquid; or solid
40±2
7.5 - 11.0
50 type
slurry; or solid
50±2
7.5 - 11.0
60 type
solid
60±2
7.5 - 11.0
70 type
solid
70±2
7.5 - 11.0
80 type
solid
80±2
7.5 - 11.0
90 type
solid
90±2
7.5 - 11.0