p-Toluene Sulphonic Acid
time:2012-09-28 16:32:57,count:0
Characteristics    excellent hydrotropic, viscosity reducing, pour point depressing, anti-caking, dispersing, emulsifying, cleansing abilities. Commonly use as acidic catalyst in organic synthesis. Non-oxidizing organic strong acid. Paper and wood can be carbonized.
Synthesis
Currently, sulfonation reaction through continuous reactor (such as: falling film reactor) is the most widely used method for preparing sulfonates.
Generally, p-toluene and sulfur trioxide react through reactor, 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
Liquid
Solid
Actives, %, ≥
30.0 - 80.0
98.0
pH (25°C, 1%), <
3.0
3.0
Test Methods
(1), Actives
GB/T 5173 Surface active agents and detergents-Determination of anionic-active matter by direct two-phase titration procedure