| 摘要 |
The present invention is a method for obtaining chitosan free of strange particles and in different presentations. Some advantages of the method are the reduction in extraction costs, the purity of the material and the formation of different physical presentations of the product; in early steps the deproteinization-desacetylation of the raw material, which optionally results from crustaceous wastes, is generated in the same step. The deproteinization and desacetylation is generally performed in different steps, with the purpose to obtain proteins without degradation; however although the proteins of the inventive process have a partial degradation degree may be sold at a lower price, considering that the cost of the protein sell may be partially absorbed by saving time, number of washes and reactants generated upon performing the deproteinization and desacetylation in a single step. Finally, in the precipitation step the way of dosing chitosan to sodium hydroxide is variable and may d epend on the desired shape of the obtained chitosan bodies, these may be spherical: dosed by dripping; threads: dosed in a continuous manner, for example using a syringe.
|
