CONTINUOUS MANUFACTURE OF PHOTOSYNTHETIC SULFONIC ACID ALKANOLAMINE FROM FATTY ACID ESTER OR PETROLEUM PARAFFIN AND PHOTOSYNTHETIC SULFONIC ACID ALKANOLAMINE OBTAINED THEREBY

摘要

1. Process for the continuous preparation of alkanolamine and/or alkylamine photosulphonates from a starting material (1) constituted by fatty acid methyl esters or petroleum paraffins comprising the following steps : a) submitting the said starting material (1) to photosulphonation under anhydrous conditions by a mixture (3) of sulphurous anhydride and oxygen under ultraviolet irradiation ; b) degassifying the product (4) from stage a of the sulphurous anhydride which it contains ; the process being characterised in that it comprises in addition the following stages ; c) adding to the degassified product (8) obtained from stage b an amount of alkanolamine and/or alkylamine (10) greater than that strictly necessary for the neutralisation of the sulphonic acids contained in such a way as to separate the mixture thus obtained into two phases, a lighter phase called the raffinate (11) and a heavier phase called the extract (12) ; d) recycling to stage a the said raffinate (11) which contains unsulphonated starting material (1) ; e) recovering the said extract (12) which contains the alkanolamine and/or alkylamine polysulphonates.