In case of batch mode of operation,

In case of batch mode of operation, reactor is filled with
the reaction mixture and one of the adducts is precalculated in
stoichiometric excess. The reaction mixture is passed over the pervaporation
membrane until the water has been removed to the
desired extent. Continuous operation is possible by arranging several
membrane systems in cascade. Gubicza et al. have studied the
synthesis of ethyl acetate catalyzed by immobilized C. antarctica
lipase in a continuous mode of operation with double pervaporation
system for water and ester removal [44]. This was the first
reported continuous system with simultaneous removal of both
products. The rate of formation and removal of ethyl acetate and
water were retained at the same level. The enzyme was stable during
the process due to the presence of ionic liquid in the system.
Ethanol, water and ethyl acetate form a ternary azeotropic mixture
which is difficult to separate by distillation. By selecting an appropriate
membrane, more products and compounds can be selectively
separated.
The importance of the former pioneering solution shows that
similar results are presented in the literature only 3 years later.
Korkmaz and co-workers have investigated the (non-enzymatic)
isobutyl acetate production by the esterification of isobutanol and
acetic acid [34]. Water and ester produced in the reaction were
removed using different membranes. The effects of membrane type,
the ratio of membrane area to reaction volume, and temperature
were investigated. PERVAP 1201 membranes provided a higher
water flux and higher selectivity than other hydrophilic membranes,


but the highest fluxes were obtained using ester-permeable
polydimethylsiloxane membrane, where isobutyl acetate is selectively
permeated. Increase in temperature and ratio of membrane
area to reaction volume resulted in higher substrate conversion.

ผลลัพธ์ (ไทย) 3:

In case of batch mode of operation, reactor is filled with
the reaction mixture and one of the adducts is precalculated in
stoichiometric excess. The reaction mixture is passed over the pervaporation
membrane until the water has been removed to the
desired extent. Continuous operation is possible by arranging several
membrane systems in cascade. Gubicza et al. have studied the
synthesis of ethyl acetate catalyzed by immobilized C. antarctica
lipase in a continuous mode of operation with double pervaporation
system for water and ester removal [44]. This was the first
reported continuous system with simultaneous removal of both
products. The rate of formation and removal of ethyl acetate and
water were retained at the same level. The enzyme was stable during
กระบวนการเนื่องจากการแสดงตนของเหลวในระบบ
เอทานอล , น้ำและรูปแบบประกอบไปด้วยส่วนผสม azeotropic
ซึ่งเป็นเรื่องยากที่จะแยกโดยการกลั่นเอทิลอะซีเตท . โดยเลือกชนิดที่เหมาะสม
ผลิตภัณฑ์มากขึ้นและสามารถเลือกแยกสารประกอบ
.
ความสำคัญของการแก้ปัญหาผู้บุกเบิกในอดีตแสดงให้เห็นว่า
similar results are presented in the literature only 3 years later.
Korkmaz and co-workers have investigated the (non-enzymatic)
isobutyl acetate production by the esterification of isobutanol and
acetic acid [34]. Water and ester produced in the reaction were
removed using different membranes. The effects of membrane type,
the ratio of membrane area to reaction volume, and temperature
คือ pervap 1201 เยื่อให้สูงขึ้นและสูงกว่าการไหล
น้ำมากกว่าเยื่อน้ำ อื่น ๆ ,


แต่ฟลักซ์สูงสุดได้ใช้เอสเทอร์ permeable
O ไอโซบิวทิลอะซิเตทเมมเบรน ซึ่งจะเลือก
( . เพิ่มอุณหภูมิและอัตราส่วนพื้นที่ของเยื่อ
เสียงปฏิกิริยาผลการแปลง
พื้นผิวสูงกว่า