Ethanol → Diethyl Maleate

HRID 2291374Notes

Reaction equation

HRID 2291374 reaction equation
[C:1]([O:8][CH2:9][CH3:10])(=[O:7])/[CH:2]=[CH:3]\[C:4]([O-:6])=[O:5].[CH2:11](O)[CH3:12]>>[C:4]([O:6][CH2:11][CH3:12])(=[O:5])/[CH:3]=[CH:2]\[C:1]([O:8][CH2:9][CH3:10])=[O:7]

Participants

3

Reactant 2

HCID 702Ethanol2×HCID 86733784(Z)-4-ethoxy-4-oxobut-2-enoate

Product 1

HCID 5271566Diethyl Maleate

Procedure

The bottom product from flash distillation column 417 is taken in line 449 to a secondary esterification reactor 450. This is provided with a stirrer 451 and a sparger 452 which is connected to a line 453 through which ethanol vapour is supplied to reactor 450. Further reaction of monoethyl maleate and ethanol occurs in reactor 450, resulting in formation of additional diethyl maleate. A stream containing recycled ethanol is returned to reactor 450 in line 454.

Workup

  1. distillationThe bottom product from flash distillation column 417
  2. customis taken in line 449 to a secondary esterification reactor
  3. customThis is provided with a stirrer 451
  4. customvapour is supplied to reactor
  5. customoccurs in reactor

Sources & evidence

ORD record
ord-5ba00109eda24c709c882fc4e7a1256e
Source dataset
uspto-grants-1989_01
Patent number
US04795824

Reaction notes

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