Sultones disulphonate

Disultones Disulphonic acid Sultone-sulphonic acid... 

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 ... 

Olefin sulphonates are complex mixtures as a result of migration of the double bond during sulphonation and hydration across the double bond, resulting in the formation of hydroxyalkane sulphonates and sultones (internal esters) and the so-called disulphonic acids (actually sulphatosul-phonic acids). These are more fully discussed in chapter 5. 

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. 

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