FIELD: technological processes.
SUBSTANCE: invention relates to organic and petrochemical catalysis, particularly to a method of producing 5-hydroxyisophthalic acid – one of widely used monomers for making polymer materials. 3,5-xylenol is acylated with acetic anhydride in the presence of sulfuric acid at 70–75 °C while stirring for 25–35 minutes, acylated xylenol is extracted and oxidized with air oxygen in the presence of a catalyst – a mixture of cobalt acetate, sodium bromide and manganese acetate – at 100–110 °C for 4–5 hours. Method of producing 5-hydroxyisophthalic acid is carried out at temperature not higher than 110 °C from non-deficient raw materials in high yield.
EFFECT: disclosed is a method of producing 5-hydroxyisophthalic acid.
1 cl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
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RU2409553C2 |
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| 0 |
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SU521834A3 | |
| 0 |
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| LIQUID-PHASE OXIDATION OF HALOGENATED ORTHO-XYLENES | 2003 |
|
RU2312862C2 |
| PROCESS FOR PREPARING 4-NITROBENZALDEHYDE | 0 |
|
SU1135740A1 |
