Water → 4-Methoxyphenol

A mixture of 40 g of the above propoxylated pentaerythritol, 30.2 g acrylic acid, 0.4 g of copper (I) oxide and 1.2 cm3 conc. H2SO4 in toluene (150 cm3) was heated with stirring in the presence of a Dean and Stark trap. The reaction was allowed to continue until 6.1 cm3 of water had been liberated. The mixture was then cooled and washed with 20% w/v aqueous sodium chloride (2×50 cm3 aliquots), then with 15% w/v aqueous potassium bicarbonate (2×100 cm3 aliquots) and finally a further wash with 20% w/v aqueous sodium chloride (2×50 cm3 aliquots). The resulting solution was then filtered and dried over anhydrous sodium sulphate. The solvent was then removed leaving the polyacrylate product as a colourless oil to which 0.2% w/w of 4-methoxyphenol, a polymerisation inhibitor, was then added.

1. temperaturewas heated
2. temperatureThe mixture was then cooled
3. washwashed with 20% w/v aqueous sodium chloride (2×50 cm3 aliquots)
4. washwith 15% w/v aqueous potassium bicarbonate (2×100 cm3 aliquots) and finally a further wash with 20% w/v aqueous sodium chloride (2×50 cm3 aliquots)
5. filtrationThe resulting solution was then filtered
6. dry with materialdried over anhydrous sodium sulphate
7. customThe solvent was then removed

ORD record

ord-c132eba332844ca7940894346ac10cd3

Source dataset

uspto-grants-1991_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04999271