Sulfuric Acid, Mono-C8-14-alkyl Esters, Lithium Salts
time:2012-09-07 15:55:32,count:0
Note    (1), Avoid using in children cleaning products, such as shower gels, shampoo, 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, C8-14 alkyl alcohol and sulfur trioxide react through reactor, then lithium 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 alcohols or other raw materials: 1:1; temperature: 30-60°C; reactor: falling film reactor.
US patent 6,455,488 (Process of making alkyl sulfate granulates) describes the preparation of a particulate alkyl sulfate, but does not involve the synthesis process.
US patent US 6,331,645 (Process for preparing powdery alkyl sulfates) describes the preparation of a powdery alkyl sulfate, but does not involve the synthesis process.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Solid
Liquid
Actives, %, ≥
90
25.0 - 35.0
Soluble materials in petroleum ether, %, ≤
/
1.5
Lithium chloride, %, ≤
/
1.0
Lithium sulfate, %, ≤
/
0.5
pH (25°C, 10% solution)
7.5-10.5
7.5-10.5
Density, g/mL, approx
/
1.02
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), Soluble materials in petroleum ether
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
(3), Lithium chloride
GB/T 15963 Sodium lauryl sulfate, lithium chloride calculated.
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