Phthalic Anhydride → 6688-50-2

HRID 2380025Notes

Reaction equation

HRID 2380025 reaction equation
[C:1]1(=[O:11])[O:6][C:4](=[O:5])[C:3]2=[CH:7][CH:8]=[CH:9][CH:10]=[C:2]12.[CH2:12]([Sn:16](=[O:21])[CH2:17][CH2:18][CH2:19][CH3:20])[CH2:13][CH2:14][CH3:15]>>[C:1]([O-:6])(=[O:11])[C:2]1[C:3](=[CH:7][CH:8]=[CH:9][CH:10]=1)[C:4]([O-:21])=[O:5].[CH2:12]([Sn+2:16][CH2:17][CH2:18][CH2:19][CH3:20])[CH2:13][CH2:14][CH3:15]

Participants

3

Reactant 2

HCID 6811Phthalic AnhydrideHCID 61221Dibutyltin oxide

Product 1

HCID 218940556688-50-2

Procedure

1.48 kg of phthalic anhydride and 2.49 kg of dibutyltin oxide are mixed with one another, and the mixture is continuously added to a twin-screw laboratory extruder via an addition tunnel. The cylinder section consists of three heating zones and a cooling zone. The temperature of the mixture in the reaction zone is 63° C. After passing through the cooling extruder unit, the product temperature at the discharge point is 38° C. The throughput takes 35 minutes, which corresponds to an average residence time of 4.7 min. Dibutyltin phthalate (compound 1) is obtained as the end product in the form of a white free-flowing powder.

Workup

  1. additionis continuously added to a twin-screw laboratory extruder via an addition tunnel
  2. customis 63° C
  3. customis 38° C
  4. customcorresponds to an average residence time of 4.7 min

Sources & evidence

ORD record
ord-65c1c69d18a849ceb0ce478c63764a88
Source dataset
uspto-grants-1994_11
Patent number
US05364954

Reaction notes

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