用分子筛催化脱水合成β－脲乙基巴豆酸酯

Synthesis of β-Ureido-ethyl Crotonate by Catalytic Dewater Using Molecular Sieve

采用新型分子筛作催化脱水剂合成β－脲乙基巴豆酸酯。用不同型号的分子筛试验，确定了ＨＺＳＭ－５型分子筛作为催化脱水剂，用量应不小于其理论吸水量。使用ＨＺＳＭ－５型分子筛后，缩短生产周期约１０天，避免了设备腐蚀。

Ureido-ethyl crotonate is synthesized using a new molecularsieve as catalytic dehydrant. Various types of molecular sieve are used experimentally , HZSM-5 is determined as catalytic dehydrant, its demand must benot less than its theoretical soakage.After HZSM-5 is used, production periodis curtailed about 10 days, corrosion of equipment is avoided.