添加稀土氯化物对甲醇低压气相羰基化制备醋酸的影响

将适量稀土添加到镍基催化剂中，并用BET、XRD和TPR对催化剂进行了表征， Ni-La/AC系列催化剂用于甲醇低压气相羰基化的结果表明，稀土（主要成分为LaCl3）对羰基化反应的诱导期、甲醇转化率和羰基化产物的收率产生了有利的影响，Ni（5%）-La （3.8%）/AC表现出较好的催化活性，比单金属负载Ni/AC催化剂在相同条件下，转化率提高了11.52%，羰基化主产物总收率提高了12.16%。

EFFECT OF RARE EARTH CHLORIDE ON VAPOR PHASE CARBONYLATION OF METHANOL TO ACETIC ACID

To study the effect of rare earth chloride on vapor phase carbonylation of methanol to acetic acid, a series of catalysts (Ni-La/AC) were prepared by loading LaCl3 onto Ni-based catalysts. The catalysts were characterized by means of BET, XRD and TPR, then were applied to the methanol carbonylation reaction after being heat treatment in nitrogen at 400 ℃ and reduction by hydrogen at 550 ℃. It was revealed that under pressurized conditions in the presence of methyl iodide, these catalysts had positire effects on induction period, conversion of methanol and yield of carbonyl products. The results indicated that Ni（5%）- La (3.8%)/AC had better catalytic activity. Compared with Ni（5%）/AC at the same operation conditions, the conversion of methanol is increased by 11.52% and the total yield of carbonyl products is improved by 12.16%.