Glucono-1,5-Lactone or GdL is a neutral cyclic ester of gluconic acid, produced with the acid by fermentation of glucose. It is separated from the acid by crystallisation. Does any one have idea to for its crystallization process, I mean temperature, total solid content, process etc.
Well, you have to design some configurations to get our process.. If you know the solubility curve, you have to study the next step: after concentration may I cool down the media? Knowing initial and final process temperature, you may estimate how much material will crystallize. If the solubility curve varies significantly with the temperature, then cooling is ok,. Otherwise you have to choose evaporation and may be vacuum evaporation. Since you will concentrate your product by evaporation you can also evaporate the mother liquor to get the crystals. Impurities in the system, however, can also concentrate and sometimes co-crystallize with you product.
This way, I think that the first question is: what is the concentration of the mother liquor? After, you have to know the solubility of your product. Is there other product that can crystallize? If yes, follow the 2 first questions for each one of the principals. Probably your solution will be undersatured and a concentration step may be necessary. Most of the time this is resolved by evaporation. In this case, Is there any material that can result in coloring your product? If yes, is color as important commercial factor?
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