Trimethylolpropane → Ditrimethylolpropane

HRID 517304Notes

Reaction equation

HRID 517304 reaction equation
[CH2:1]([C:3]([CH2:8][OH:9])([CH2:6][OH:7])[CH2:4][CH3:5])[OH:2]>O>[CH3:5][CH2:4][C:3]([CH2:8][O:9][CH2:8][C:3]([CH2:6][OH:7])([CH2:1][OH:2])[CH2:4][CH3:5])([CH2:6][OH:7])[CH2:1][OH:2]

Participants

3

Reactant 1

HCID 6510Trimethylolpropane

Product 1

HCID 90038Ditrimethylolpropane

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

DE 10 2010 033 844 A1 likewise concerns a process for obtaining ditrimethylolpropane from the secondary streams of trimethylolpropane preparation. This involves dissolving the high-boiling fractions and residues obtained in water and catalytically hydrogenating the aqueous solution in the presence of an acidic compound to split formaldehyde-containing acetals. After removal of solids, the aqueous hydrogenated material is then contacted both with basic and with acidic ion exchangers. A trimethylolpropane-enriched product stream is distilled out of the aqueous eluate, and ditrimethylolpropane remains as the distillation residue. In order that ditrimethylolpropane is obtained in sufficient quality in the distillation residue, in the process according to DE 10 2010 033 844 A1, the treatment of the aqueous hydrogenated material both with basic and with acidic ion exchangers is absolutely necessary.

Workup

  1. dissolutionThis involves dissolving the high-boiling fractions and residues
  2. customto split formaldehyde-
  3. additioncontaining acetals
  4. customAfter removal of solids
  5. distillationA trimethylolpropane-enriched product stream is distilled out of the aqueous eluate, and ditrimethylolpropane

Sources & evidence

ORD record
ord-b2cdea63984243f481a37afb9920250b
Source dataset
uspto-grants-2015_08
Patent number
US09115110B2

Reaction notes

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