Sodium dodecylbenzene sulfonate
time:2012-09-28 16:23:35,count:0
Generally, 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
Test Methods
(1), Actives
GB/T 5173 Surface active agents and detergents-Determination of anionic-active matter by direct two-phase titration procedure
ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure
(2), pH
GB/T 6368 Surface active agents - Determination of pH of aqueous solution - Potentiometric method
ISO 4316 Surface active agents -- Determination of pH of aqueous solutions -- Potentiometric method
2. Hazardous substances indexes
Item
Hazardous substances indexes
Heavy metals (as Pb), mg/Kg, ≤
20
As, mg/Kg, ≤
3
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents - Determination of heavy metals