Water → Ethylenediaminetetraacetic Acid

Participants

Reaction Conditions

Reaction Steps

Into 200 ml of N, N-dimethylformaldehyde, 35.3 g of ethylenediamine tetraacetic dianhydride was added and dissolved through the application of heat at 80° C. Into thus-obtained liquid solution, 0.4 g of cotton cloth (unbleached cotton knit) was soaked and heated at 80° C. for 6 hours. Next, the cotton cloth was soaked into 500 ml of distilled water. In this state, pH of the distilled water was adjusted to about 10 using ammonium water, and the water was stirred for 3 hours to dissolve and remove the unreacted ethylenediamine tetraacetic acid. Then, the cotton cloth was soaked into 500 ml of 0.1 normal sulfuric acid aqueous solution and was stirred for 3 hours. After that, the cotton cloth was repeatedly washed with distilled water until the washing distilled water was neutralized, and then was dried at 60° C. for 5 hours. As a result, 0.54 g of cotton-EDTA type chelate forming fiber was obtained (substitution rate: 35 weight percent).

Provenance & Evidence