摘要
以丙二醇甲醚为原料,利用共沉淀法制备的Cu-ZnO为催化剂,在固定床反应器中催化脱氢合成甲氧基丙酮。考察了催化剂制备工艺和反应条件对催化活性的影响,并对催化剂的稳定性进行了研究。结果表明,催化剂最佳制备条件是:铜锌物质的量比为0.5,沉淀温度为55℃,55℃老化1 h,采用硝酸钠改性,400℃焙烧4 h。催化剂最佳反应工艺:240℃下还原4 h,反应温度为250℃,液空时速为40 mL/h,氮载气速度为150 mL/min。催化剂在120 h内稳定性良好。
Methoxyacetone was synthesized from proprylene glycol monomethyl ether using co-precipitated copper-zinc oxide as catalyst in fixed-bed reactor. Optimal preparation of catalysts was studied and the best conditions for the targeted reaction were in- vestigated. Results showed that the optimal parameters for Cu-ZnO catalysts are listed as followed ： ncu ： nzn = 0. 5, precipitation temperature of 55 ℃ ,aging temperature of 55 ℃ for 1 h,being modified by sodium nitrate,and being annealed at 400 ℃ for 4 h. Meanwhile,the optimal condition for the reaction of converting proprylene glycol to methoxyacetone is obtained to be first reduced at 240 ℃ for 4 h,then going through reaction under 250℃. The liquid space velocity and flowing rate of nitrogen should be 40 mL/h and 150 mL/min,respectively. The as-made catalyst showed excellent stability in the time duration of 120 h.
作者
陈涛
宁斌科
林双政
王列平
杨建明
CHEN Tao NING Bin-ke LIN Shuang-zheng WANG Lie-ping YANG Jian-ming(State Key Laboratory of Fluorine ＆ Nitrogen Chemicals, Xi＇an Modern Chemistry Research Institute,Xi＇an 710065, China)
出处
《化学试剂》
CAS
北大核心
2017年第3期293-296,共4页
Chemical Reagents
关键词
丙二醇甲醚
甲氧基丙酮
铜-氧化锌-三氧化二铝
催化剂制备
proprylene glycol monomethyl ether
methoxyacetone
copper-zinc oxide-aluminum oxide
catalyst optimization
