炭黑工艺研究与转筒干燥器工艺计算

Treatment of waste sulfuric acid in sulfonation of p -Nitrotoluene by macroporous resin adsorption

本文介绍了较为成熟的碳黑生产工艺,并针对碳黑干燥工序常用的转筒干燥器的设计问题,阐述了工艺计算之前需要掌握的原始数据、工艺计算顺序和参数选择。

The adsorption of the waste sulfuric acid in sulfonation of p-nituotoluene（PNT） by using macroporous resin H1020 has been investigated. The influences of adsorption temperature,the initial concentration of waste acid, time and velocity on the adsorption effect have been discussed. The experimental results show that the COD of waste sulfuric acid is reduced from 7420mg/L to less than 600mg/L with the removal of 90% COD.Under the proposed optimum conditions, the resin desorption ratio is over 99%.After several times of adsorption-desorotion, the H 1020 resin maintains the good efficiency for the treating of waste sulfuric acid.