A travelling belt vacuum filter in the manufacture of analgin

A drum vacuum fi l ter BOK 3-1.75 has been used for six years in the manufacture of analgin at the stage of reducing ni t rosoant ipyrine for the separat ion of the suspension of ni trosoantipyrine in the Red Star Pharmaceut ica l Chemical Works. The use of this f i l ter apart f rom a ser ies of virtues has a deficiency: The residue of ni t rosoantipyrine… CONTINUE READING