Rohm and Haas Company ;Dow Global Technologies LLC
发明人:
Worley William G.,Hoy, IV Stacy W.
申请号：
US201615776847
公开号：
US2018346402(A1)
申请日:
2016.12.07
申请国别(地区):
美国
年份:
2018
代理人:
摘要：
A process for purifying methyl methacrylate by feeding a product mixture comprising methanol, methyl methacrylate and alkali metal salts thereof, methacrolein, water and heavy byproducts to a distillation column having at least 15 trays. The product mixture and a C6-C7 hydrocarbon enter the distillation column above the middle of the distillation column. An overhead stream comprising C6-C7 hydrocarbon, methacrolein, methanol, water and methyl methacrylate and a bottoms stream comprising water, methyl methacrylate and its alkali metal salt and heavy byproducts are removed from the column.
