Formaldehyde → Formaldehyde

HRID 2372878Notes

Reaction equation

HRID 2372878 reaction equation
[C:1]1([S:11]([OH:14])(=[O:13])=[O:12])[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][CH:2]=1.[CH2:15]=[O:16].C=O>>[C:1]1([S:11]([OH:14])(=[O:12])=[O:13])[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][CH:2]=1.[CH2:15]=[O:16]

Participants

4

Reactant 2

HCID 712FormaldehydeHCID 57351120Morwet D 425

Product 2

HCID 712FormaldehydeHCID 68121-Naphthalenesulfonic acid

Procedure

Process for the preparation of naphthalenesulfonic acid/formaldehyde condensates having a low content of free formaldehyde, in which the condensation products of naphthalenesulfonic acid and formaldehyde obtained after the condensation are brought to a pH of greater than 11.5 at a temperature of not less than 80° C. immediately after the condensation, and are kept under these conditions until the desired formaldehyde content is reached. The resins are preferably used as plasticizers for building materials, for example as concrete plasticizers.

Sources & evidence

ORD record
ord-f069acdc3b594871bd98e222af46bb9d
Source dataset
uspto-grants-1992_03
Patent number
US05101007

Reaction notes

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