Maleic Anhydride → 78-04-6

HRID 2380027Notes

Reaction equation

HRID 2380027 reaction equation
[C:1]1(=[O:7])[O:6][C:4](=[O:5])[CH:3]=[CH:2]1.[CH2:8]([Sn:12](=[O:17])[CH2:13][CH2:14][CH2:15][CH3:16])[CH2:9][CH2:10][CH3:11]>>[C:1]([O-:6])(=[O:7])/[CH:2]=[CH:3]\[C:4]([O-:17])=[O:5].[CH2:8]([Sn+2:12][CH2:13][CH2:14][CH2:15][CH3:16])[CH2:9][CH2:10][CH3:11]

Participants

3

Reactant 2

HCID 7923Maleic AnhydrideHCID 61221Dibutyltin oxide

Product 1

HCID 990625178-04-6

Procedure

A mixture of 2.28 kg of maleic anhydride and 5.97 kg of dibutyltin oxide is continuously added to a screw drier whose heat exchange areas consist of two heating and one cooling zone. Behind each heating zone, a suction device is present for removing any water of reaction which may be formed. The reaction mixture passes through both heating zones at an average residence time of 7.5 minutes, the temperature of the first heating zone being 68° C. and that of the second one being 63° C., and is then cooled to 25°-30° C. At the exit of the screw drier, dibutyltin maleate (compound 3), is obtained as a white free-flowing powder.

Workup

  1. additionis continuously added to a screw drier whose
  2. temperatureheat exchange areas
  3. customfor removing
  4. customany water of reaction which
  5. custommay be formed
  6. custompasses through both heating zones at an average residence time of 7.5 minutes
  7. custombeing 68° C. and that of the second one being 63° C.
  8. temperatureis then cooled to 25°-30° C

Sources & evidence

ORD record
ord-a152ef1e533744db89e8ce5159cf60e5
Source dataset
uspto-grants-1994_11
Patent number
US05364954

Reaction notes

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