公开(公告)号：DE2434632A1

公开(公告)日：1975-02-13

申请号：DE2434632

申请日：1974-07-18

Applicant: AGENCY IND SCIENCE TECHN

Inventor： TERAJIMA KAZUKU ,  TOMITA SHIGERU ,  MATSUDA YOSHINDO ,  ABE KEIJI

IPC: C09K3/32 ,  B01J20/24 ,  C02F1/28 ,  C02F3/34

Abstract: New adsorbents comprising granules of a mixture of nitrohumic acid and one or more proteins. These adsorbents are utilizable effectively for adsorbing heavy metals and oils contained in water. They are produced advantageously by either a process wherein a mixture of nitrohumic acid and a protein is kneaded with an aqueous solution of alkali and the kneaded mixture is first subjected to an acid treatment and then shaped into granules, or a process wherein nitrohumic acid and a protein are dissolved in an aqueous solution of alkali, the solution is acidified to form a precipitate and then the precipitate is separated and shaped into granules. The granular products thus obtained can be further improved in mechanical strength by means of a heat treatment.