Method for preparing activated carbon by using papermaking black liquor as active agent

Abstract

The invention discloses a method for preparing activated carbon by using a papermaking black liquor as an active agent. The method comprises the steps of black liquor acidification, caustization, carbonizing of wood chips and activization. According to the method, lignose in the papermaking black liquor is recycled; as the black liquor subjected to acidification and caustization is used as the active agent for preparing the activated carbon, the pollution of the black liquor is efficiently controlled; the method has remarkable economical and social benefits.

Description

technical field

[0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing activated carbon by using papermaking black liquor as an active agent. Background technique

[0002] Pulp and paper black liquor is one of the main pollutants in paper mills. According to the analysis of my country's paper industry policy in 2007, by 2010, the effective production capacity of paper and paper will reach 90 million tons, and the analysis of the pollutant emission reduction target of the paper industry during the Eleventh Five-Year Period found that the total amount of paper pollution during this period The removal rate is maintained at about 71%. According to the effective production capacity by 2010, there will be more than 2 billion tons of pollutants to be treated, including a large amount of untreated pulping black liquor. Black liquor treatment technology at this stage mainly includes alkali recovery and biochemical treatment...