Formaldehyde → Naphthalene

HRID 1378886Notes

Reaction equation

HRID 1378886 reaction equation
[C:1]1(C=O)[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][CH:2]=1.C1(O)C=CC=CC=1.C(O)(=O)C(O)=O.C=O>C1(C)C=CC(S(O)(=O)=O)=CC=1>[CH:9]1[C:10]2[C:5](=[CH:4][CH:3]=[CH:2][CH:1]=2)[CH:6]=[CH:7][CH:8]=1

Participants

6

Reactant 4

HCID 712FormaldehydeHCID 971Oxalic AcidHCID 996PhenolHCID 61951-Naphthaldehyde

Product 1

HCID 931Naphthalene

Reagents, catalysts & solvents 1

HCID 6101p-Toluenesulfonic acidCatalyst

Procedure

One hundred parts of naphthalene-formaldehyde resin and 100 parts of phenol were reacted for 2 hours at 140° C. using 0.1 parts of p-toluenesulfonic acid as a catalyst. Then, 1 part of oxalic acid and 35 parts of 37% formalin were added, and the mixture was reacted for 2.5 hours at 100° C. Then, the reaction mixture was dehydrated under reduced pressure with heating. When the temperature reached 165° C., dehydration under reduced pressure was completed to obtain a naphthalene resin modified novolak-phenolic resin having a melting point of 125° C.

Workup

  1. customthe mixture was reacted for 2.5 hours at 100° C
  2. temperaturewith heating
  3. customreached 165° C.

Sources & evidence

ORD record
ord-80cb80d49d634c0ab139c7d2686fb39f
Source dataset
uspto-grants-1997_09
Patent number
US05670231

Reaction notes

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