Sugar liquors, purification

Sugar liquors, purification of, 50. Sulphides, preparation of, 42. Sulphuric acid, preparation of, 28. 

From the standpoint of economy of production there are three losses common to the bone black method of producing com sugar which are not common to starch purification methods the loss of 20% to 40% of the original weight of the sugar in the form of hydrol the loss of sugar liquor in the bone after filtration and the expense of bone black, its use, and revivification. 

Two broad areas of application for xylanolytic enzymes have been identified (1). The first involves the use of xylanases with other hydrolytic enzymes in the bioconversion of wastes such as those from the forest and agricultural industries, and in the clarification and liquification of juices, vegetables and fruits. For these purposes, the enzyme preparations need only to be filtered and concentrated as essentially no further purification is required. Several specific examples of applications involving crude xylanase preparations include bioconversion of cellulosic materials for subsequent fermentation (2) hydrolysis of pulp waste liquors and wood extractives to monomeric sugars for subsequent production of single cell protein (3-5). Xylose produced by the action of xylanases can be used for subsequent production of higher value compounds such as ethanol (6), xylulose (7) and xyIonic acid (8-9). 

Collins, J. W., Boggs, L. A., Webb, A. A., and Wiley, A. A. (1973). Spent sulfite liquor reducing sugar purification by ultrafiltration with dynamic membranes. Tappi 56(6), 121 -124. 

The carbonation process is similar to that used in the purification of juice for raw sugar processing except for the high liquor density compared to the juice in the cane. The process involves two stages. In the first stage, the high density liquor is heated from 60 to 80°C in a saturated tank and is limed to about pH 10. The carbon dioxide gas from the... 

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