CELLULOSE PHOSPHATE

Chemical Properties

cation exchanger ~4.4 meq/g

Uses

Cellulose phosphate is used in protein chromatography, ion exchange chromatography and cation exchange media. Cellulose phosphate (CELLPHOS) has been studied as a collector for analytical preconcentration of traces of Cd(II), Cr(III), Cu(II) and Ni(II) from aqueous sample solution and used to purify and characterize acid phosphatase from approximately 3000-year-old human bones from archeological excavations.

Uses

for protein immobilization and condensations with other amine-containing reagents.

Uses

Phosphorylated cellulose fibers show increased swelling after partial hydrolytic degradation and transfer into the alkali salt form and were, therefore, suggested for use as adsorbents.

Preparation

Cellulose phosphates with a low phosphorus content are obtained by reacting cellulose or linters with phosphoric acid in an urea melt. Higher phosphorus contents and a lower degradation rate of the cellulose may be obtained with excess urea at reduced reaction time (ca. 15 min) and at high temperature (ca. 140 ℃). Water-soluble cellulose phosphate with a high degree of substitution may be obtained from a mixture of phosphoric acid and phosphorus pentoxide in an alcoholic medium.