How to dissolve NaHSO3 in FAME? How did we come to know that, the reaction of sulphonation is completed? What exactly did methanol do during the purification of FAMES?
Dear Avishkar Bhagat many thanks for sharing this very interesting technical question with the RG community. As a synthetic inorganic chemist I'm absolutely not an expert in this field of research. However, please have a look at the following potentially useful literature reference which might help you in your analysis:
Synthesis of polymeric surfactant from palm oil methyl ester for enhanced oil recovery application
http://repository.iti.ac.id/bitstream/123456789/336/3/Synthesis%20of%20polymeric%20surfactant%20from.pdf
This article is freely accessible from the internet (please see the attached pdf file). As far as I can see, there is no need to dissolve the NaHSO3 prior to the reaction. The salt will dissolve during the course of the reaction upon heating. Apparently methanol serves to precipitate the product so that a purification by preciptation can be achieved.
For a more general overview of the field, please also check the following relevant literature reference:
Current Trends in Separation and Purification of Fatty Acid Methyl Ester
Article Current Trends in Separation and Purification of Fatty Acid ...
Fortunately this review article has been posted by the authors as public full text on RG, so that you can freely download it as pdf file.
I hope this helps answering your question. Good luck with our work and please stay safe and healthy! With best wishes, Frank Edelmann
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