Phenol → Formaldehyde

HRID 1030258Notes

Reaction equation

HRID 1030258 reaction equation
[C:1]1([OH:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[OH-].[Na+]>O>[C:1]1([OH:7])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH2:1]=[O:7]

Participants

5

Reactant 2

HCID 996PhenolHCID 14798Sodium Hydroxide

Product 2

HCID 712FormaldehydeHCID 996Phenol

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

This example also demonstrates that phenol will gel a polyacrylamide relatively quickly. A solution of the xanthan biopolymer, Flocon® 4800, (2000 ppm), Phillips HE-B® (5000 ppm), phenol (1000 ppm), formaldehyde (1900 ppm), CrCl3 (100 ppm Cr) was prepared in synthetic sea water. Sodium hydroxide (1N) was used to adjust the pH to 5.85. The composition so prepared gelled in one hour, presumably from the interaction of Cr with the Flocon® biopolymer. This blend was left to fully crosslink overnight, then liquefied in a Waring blender for 30 seconds and placed in an ampoule. The ampoule was then stored at 210° F. An elastic gel was formed between 6 and 22 hours. Three weeks later, the gel was observed to still be firm, with<5% syneresis.

Workup

  1. waitThis blend was left to fully crosslink overnight
  2. waitliquefied in a Waring blender for 30 seconds
  3. customwas then stored at 210° F
  4. customAn elastic gel was formed between 6 and 22 hours
  5. customThree weeks

Sources & evidence

ORD record
ord-d5b705aee30449b781433eff5ba0754c
Source dataset
uspto-grants-1992_04
Patent number
US05104912

Reaction notes

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