2,6-Dimethylnaphthalene → 2,7-Dimethylnaphthalene

HRID 414395

Reaction equation

HRID 414395 reaction equation
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]2[CH:8]=[C:9]([CH3:12])[CH:10]=[CH:11][C:4]=2[CH:3]=1.[CH3:13][C:14]1[CH:19]=[CH:18][C:17]2[CH:20]=[CH:21][C:22]([CH3:24])=[CH:23][C:16]=2[CH:15]=1>C1(C)C=CC(C)=CC=1>[CH3:13][C:14]1[CH:19]=[CH:18][C:17]2[CH:20]=[CH:21][C:22]([CH3:24])=[CH:23][C:16]=2[CH:15]=1.[CH3:1][C:2]1[CH:7]=[CH:6][C:5]2[CH:8]=[C:9]([CH3:12])[CH:10]=[CH:11][C:4]=2[CH:3]=1.[CH3:12][C:9]1[CH:10]=[CH:11][C:4]2[CH:3]=[CH:2][C:7]([CH3:13])=[CH:6][C:5]=2[CH:8]=1

Participants

5

Reactant 2

HCID 113872,6-DimethylnaphthaleneHCID 113962,7-Dimethylnaphthalene

Product 2

HCID 113962,7-DimethylnaphthaleneHCID 1317157962,6-Dmn 2,7-dmn

Reagents, catalysts & solvents 1

HCID 7809P-XyleneSolvent

Procedure

An agitation vessel of the same type as used in the crystallizing steps of Example 1 was charged with 152.2 g of a solution consisting of 2,6-DMN, 2,7-DMN and paraxylene at a weight ratio of 9:9:82 and the charged solution was cooled from 19.5° C. to 7.0° C. over a period of 72 minutes. The change in the composition of the liquid phase in the solution with time was analyzed and it was found that 2,6 -DMN and 2,7-DMN formed a eutectic mixture at a 2,6-DMN/2,7-DMN ratio of 0.59.

Workup

  1. customAn agitation vessel of the same type as used in the crystallizing steps of Example 1
  2. temperaturethe charged solution was cooled from 19.5° C. to 7.0° C. over a period of 72 minutes

Sources & evidence

ORD record
ord-861ee37f3c3744f68d5e2072ebea0271
Source dataset
uspto-grants-1988_12
Patent number
US04791235

Linked notes

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