Improving monohydrate dextrose economics with enzymic reconversion was written by Mahbubar Rahman, A. F. M.;Schenck, Fred W.. And the article was included in International Sugar Journal in 1998.Name: (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate This article mentions the following:
The manufacture of pure dextrose (I) crystals results in production of a quantity of mother liquor (usually sold as a process co-product called hydrol) that contains the polysaccharides resulting from incomplete starch (II) hydrolysis. In sucrose-exporting countries, and in countries where sugar prices are not increased above the world market by tariffs, this co-product of monohydrate I production does not command a very high price. Even in the U.S.A., where sugar prices are elevated by tariff, hydrol sells at a lower price than other II sugars. This results in a significant neg. impact on process economics. By sep. reconverting the mother liquor portion of the recycle stream (in a greens recycle I monohydrate crystallization process) using glucoamylase, it was possible to provide substantial increases in process yield and allow the nearly complete conversion of II to monohydrate I. Using reconversion, the process yield of a I plant in Bangladesh was increased from 81% to 98%, resulting in a 91.5% decrease in the production of a low-value co-product stream and a 13.3% operating profit increase. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Name: (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate).
(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Tetrahydropyrans and furans principally constitute as a central motif in diverse medicinally privileged molecules. The reaction of tertiary 1,4- and 1,5-diols with cerium ammonium nitrate at room temperature gives tetrahydrofuran and tetrahydropyran derivatives in high yield and stereoselectivity. Various fragrant compounds have been synthesized using this method.Name: (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate
Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics