A reversed-titration method for determination of sulfonation value with methylene blue using the anionic surfactant sodium lauryl sulfate as the standardized titration solution has been described in this paper.

Experiment on the technique of sulfonation of semi-chemical pulping black liquor as a water reducing agent;

Some discussions on the reform of sulfur trioxide sulfonation technology;

Research and development of liquid sulfur trioxide sulfonation;

The properties and applications of sulfonated poly ether ether ketone;

Application of sulfonated β-cyclodextrin in fragrance finishing for wool fabric;

A series of sulfonated poly(ether ether sulfone)(SMPEES) copolymers were synthesized via the aromatic nucleophilic polycondensation of disodium 3,3′-disulfonate-4,4′-dichlorodiphenylsulfone(SDCDPS),4,4′-dichlorodiphenylsulfone(DCDPS) and o-methylhydroquione.

Study on nano-modified SiO_2/sulfonated polystyrene-maleic anhydride viscosity reducer

This paper presents a synthesis of 1-naphthylamine-5-sulfonate Acid new method:1-naphthylamine for raw materials,step by sulfonation reaction in 1-naphthylamine-5-sulfonate,product purity greater than 95%,the yield was 45% with good quality and fewer reaction steps advantages.

Sulphonating Process Optimization for white Oil Plant;

Contrasted the mutual relations between the sulphonating depth, sulphonating time and the conductivity of per weight unit.

In this paper,the production of PTSA with the improved sulphonating method is presented.