发明授权
- 专利标题： Continuous esterification process
- 专利标题（中）： 连续生产过程
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申请号： US29581172申请日： 1972-10-10
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公开(公告)号： US3776947A公开(公告)日： 1973-12-04
- 发明人: SHIMIZU N , YOSHIDA S , KUBOTA K , KOBAYASHI D , OHARA T
- 申请人： NIPPON CATALYTIC CHEM IND
- 专利权人： Nippon Catalytic Chem Ind
- 当前专利权人： Nippon Catalytic Chem Ind
- 优先权： US29581172 1972-10-10; FR7236211 1972-10-12; DE2252334 1972-10-25; SU1843733 1972-10-28
- 主分类号： C07C67/08
- IPC分类号： C07C67/08 ; C07C69/54
摘要：
IN THE PROCESS FOR CONTINUOUSLY PREPARING ACRYLIC ACID ESTERS OR METHACRYLIC ACID ESTERS BY REACTING ACRYLIC ACID OR METHACRYLIC ACID WITH AN EXCESS OF EITHER METHANOL OR ETHANOL IN THE LIQUID PHASE IN THE PRESENCE OF AN ACIDIC CATALYST, THE METHOD CHARACTERIZED IN THAT THE ACRYLIC ACID OR METHACRYLIC ACID AND ALCOHOL ARE REACTED IN THE REACTION ZONE AT A MOLAR RATIO OF 1:1.2-5.0 AT A TEMPERATURE OF 40-100*C.; IN HEATING THE RESULTING REACTION PRODUCT IN AN EVAPORATING STILL TO DISTILL OFF THE ACRYLIC ACID ESTER OR METHACRYLIC ACID ESTER, WATER AND ALCOHOL, THE CONCENTRATION OF THE ACRYLIC ACID OR METHACRYLIC ACID OF THE BOTTOM LIQUID INSIDE THE EVAPORATING STILL IS MAINTAINED AT 10-40% BY WEIGHT; AND THE BOTTOM LIQUID IN AN AMOUNT OF AT LEAST 0.4 TIMES BY WEIGHT OF THE TOTAL AMOUNT OF THE ACRYLIC ACID OR METHACRYLIC ACID AND ALCOHOL FED TO THE REACTION ZONE IS RECYCLED FROM THEEVAPORATING STILL TO THE REACTION ZONE.
公开/授权文献
- USD815579S1 Aquatic vehicle 公开/授权日：2018-04-17
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