Sulfuric acid, mono-C12-18-alkyl esters, ammonium salts
time:2013-10-20 11:51:57,count:0
Ammonium C12-18 alkyl sulfate and ammonium C12-18 pareth sulfate complexes can produce excellent synergies, such as: rich foam, very mild, excellent thickening properties.
Note    (1), Avoid using in children products that can be direct prolonged contact with the skin, such as: skin care products.
Synthesis
Currently, sulfated reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfates.
Generally, C12-18 alkyl alcohol and sulfur trioxide react through reactor, then ammonia water 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 alcohols 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
68 type
28 type
25 type
Actives, %, ≥
66 - 70
27 - 29
24 - 26
Unsulfated materials, %, ≤
4.0
1.5
1.5
(NH4)2SO4, %, ≤
2.0
1.0
1.0
NH4Cl, %, ≤
0.5
0.3
0.3
pH (25°C, 10% solution)
5.5 - 7.0
5.5 - 7.0
5.5 - 7.0
Color Hazen (5% solution), ≤
30
30
30
Fe, mg/Kg, ≤
5
5
5
Density, g/mL, approx.
1.0
1.0
1.0
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), Unsulfated materials
GB/T 11989 Anionic surface active agents - Determination of soluble matter content in light petroleum
ISO 894 Surface active agents -- Technical sodium primary alkylsulphates -- Methods of analysis
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