A Practical Process for the Preparation of Super Slurper, a Starch-Based Polymer with a Large Capacity to Absorb Water

Autor: George F. Fanta, L. D. Miller, William M. Doane, M. O. Weaver, R. R. Montgomery, V. E. Sohns
Rok vydání: 1977
Předmět:
Zdroj: Starch - Stärke. 29:413-422
ISSN: 1521-379X
0038-9056
DOI: 10.1002/star.19770291205
Popis: The solid, water-insoluble sorbent called Super Slurper that swells in water is a base hydrolyzed starch-polyacrylonitrile graft copolymer in which the nitrile functionality has been converted to a mixture of carboxamide and alkali metal carboxylate. A process for making the polymer in multipound quantities has been developed from laboratory scale-up studies. This process avoids intermediate isolation steps, permits efficient removal of unreacted monomer, keeps the concentration of extraneous salts low and gives a high solids concentration for the drying step. Variation in drying procedure allows Super Slurper to be made in film, mat, powder or flake form. Shearing the hydrolysis mixture prior to isolation and avoiding extended exposure of isolated product to elevated temperature gives Super Slurper with highest absorptive capacity. All equipment used is common to industrial practice. The cost to make crude drum-dried flakes is estimated preliminarily at $ 0.32/lb for a 107 lb/year hypothetical plant.
Databáze: OpenAIRE
Externí odkaz: