Study of the partial and exhaustive intramolecular dehydration of D-sorbitol

Ileana Cocan, Monica Viorica Negrea, Ionel Vasile Jianu

Volume 19, Issue 2;
Pages: 259-270;
ISSN: 2069-0053 (print) (former ISSN: 1453-1399), Agroprint;
ISSN (online): 2068-9551
Sweetener, humectants, sequestrant, texturizer, stabilizer, bulking agent, D-sorbitol represents a leading product in the processing of the polysorbate class. The scope of this work is to obtain details on the preparation and accession of D-sorbitol mono- and dianhydride as a method of chemical protection of primary and secondary hydroxyl functional groups (1:4) (3:6) as part of the strategy of controlled processing of polysorbates containing “homogeneous” polyoxyethylenic chains (n = 3, 6, 9, 18). This work is investigating the dependence of yield of internal dehydration (partial and/or exhaustive, direct of D-sorbitol) on temperature (100-160°C and 120-200°C, respectively) and duration (5–35 minutes and 10–100 minutes, respectively) for the processing of 1,4-sorbitan and 2,5-isosorbide. The evolution of the hydroxyl number (mg KOH/g D-sorbitol) (mg KOH/g 1,4-sorbitan) related to the theoretical (initial) value was followed and optimal values for the yield and dehydration parameters were established. Also in this work, the mathematical modeling of the dependence curves experimentally registered is realized.
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