摘要
以甲苯光氯化副产物HC l为反应原料气,采用自制催化剂对氯化氢进行在线氧化,并将氧化后的混合气体直接用于氯化过程.通过浸渍法得到-γA l2O3负载的以C r2O3为主要组分的催化剂,活性稳定,经过150 h活性试验,活性没有明显下降,在温度360℃,进料HC l与O2的摩尔比为1¨1和质量空时5 h条件下可取得大于80%的转化率.氯气循环利用研究结果表明:将氧化反应后混合气体直接用于甲苯氯化反应,在适宜催化剂存在下氯化是完全可行的,混和气体中氯气利用率接近100%.
The direct recycle of chlorine was studied in this paper. The hydrogen chloride from the by-product of toluene photo chlorination was directly used as oxidation reaction raw gas. After being simply treated, the mixed gases from oxidation reactor were inducted into chlorination reactor to chlorinate toluene. The chromic oxide catalyst was prepared by impregnating γ-Al2O3, which has a stable activity and there was no obvious deactivation after 150 hours activity test. High HCI conversion of 80% was obtained under the conditions of the reaction temperature of 360℃, the raw material HCl/O2 mole ratio of 1 ：1, feed space time of 5 h. The chlorine recycling result shows that it is feasible that the mixed gases from oxidation reactor can be directly utilized in toluene chlorination with some proper catalyst. The chlorine from oxidation reactor utilization ratio could reach 100 %.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2005年第6期821-824,共4页
Journal of China University of Mining & Technology
基金
中国矿业大学青年科研基金项目(OH4538)
关键词
氯化氢
催化氧化
氯气
催化剂
循环利用
hydrogen chloride
catalytic oxidation
chlorine
catalyst
recycle
