Technical preparation of sulfonates and sulfates

Detailed descriptions of 13 typical commercial processes are presented in this section. It will be noted that many of the principles employed are discussed more generally in preceding sections of this chapter. 

Sulfomethylation of Aniline. Aniline is reacted with aqueous sodium hydroxymethanesulfonate (formaldehyde-bisulfite)  

This general procedure is applicable to other types of compounds containing — NHs groups. 

Addition of Sodium Bisulfite to a Maleic Acid Ester. This reaction proceeds as follows, R being 2-ethylhexyl  

ROCOCH=CHCOOR + NaSO,H - ROCOCftCH (SOsNa) COOR 

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