Hits:

Date of Publication:2022-10-09

Journal:大连理工大学学报

Affiliation of Author(s):化工学院

Volume:52

Issue:3

Page Number:333-337

ISSN No.:1000-8608

Abstract:Two-stage oxidation is adopted to improve the yield of benzene
   polycarboxylic acids(BPCA) from Yangquan anthracite.Preoxidation is
   added to alkali-oxygen oxidation.The samples of preoxided coal are
   analyzed to investigate the relation between structure,nature and their
   influences on formation of BPCA by means of ultimate analysis,infrared
   spectra and analysis of groups.The optimum preoxidation conditions of
   Yangquan anthracite are obtained: 300 ℃,3 h.On the basis of optimum
   preoxidation conditions,the yield of BPCA to coal is 28.95%(daf),about
   more than 4.51% of that without preoxidation method.With addition of 12%
   acetic acid in the alkali-oxygen oxidation stage of two-stage
   oxidation,the yield of BPCA to coal is 37.17%(daf),about more than
   34.19% of that without preoxidation method.

Note:新增回溯数据