Alkane sulphonates disulphonates

The combination of neutralisation/hydrolysis gives a product containing about 55-65% alkene sulphonates and 25-35% hydroxy alkane sulphonates and 5-15% disulphonates. The C(l,3) sultones and D(l,4) sultones have virtually disappeared in the plug flow reactor with a residence time of 30 minutes at HO C. The ratio between initial and final concentration of delta (1,4) sultones will be ... 

Many monosulphonates can be extracted from 3 M hydrochloric acid with diethyl ether. Disulphonates and hydrotropes which are low-molecular-weight sulphonates are not extracted. In the case of a-olefin sulphonates the hydroxyalkane sulphonates are converted to sultones and extracted with the monosulphonic acid. The method is applicable to alkylbenzene sulphonates, mono- and dialkylsulphosuccinates and a-olefin sulphonates, but apparently not to alkane sulphonates. 

Alkane sulphonates contain both mono- and disulphonates. The monosul-phonates can be determined by direct titration with benzethonium chloride according to ISO 2271, and this is the procedure recommended in ISO 6121 [13], but see the comment at the end of section 5.7.3. 

This section describes methods for total alkane sulphonates, extraction and determination of mean molecular weight of alkane monosulphonates and separation and determination of alkane mono- and disulphonic acids. 

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