FIELD: chemistry.
SUBSTANCE: method involves the following stages: a) reaction of phenol and acetone in the presence of acid catalyst to obtain reaction mix containing bisphenol A. Further, b) water is removed from reaction mix by distillation, with distillation column operated at 100°C to 150°C in the bottom column part and at 20°C to 80°C in the top column part, 50 mbar to 300 mbar absolute pressure in the top column part and 100 mbar to 300 mbar absolute pressure in the bottom column part. Bisphenol A adduct with phenol is removed from reaction mix before distillation at b) stage by crystallisation and filtration.
EFFECT: maximum retention of unreacted residual acetone in reaction solution.
9 cl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| SYNTHESIS OF BISPHENOL A WITH LOW ISOMERISATION | 2005 |
|
RU2402521C2 |
| METHOD OF PRODUCING BISPHENOL A | 2004 |
|
RU2384558C2 |
| METHOD OF EXTRACTING PHENOL FROM PHENOL-CONTAINING STREAMS IN PRODUCTION OF BISPHENOL A | 2005 |
|
RU2401255C2 |
| METHOD OF OBTAINING BISPHENOL-A | 2005 |
|
RU2342356C1 |
| METHOD OF OBTAINING BISPHENOL-A | 2019 |
|
RU2799337C2 |
| METHOD OF PRODUCING HIGH-PURITY BISPHENOL A AND PRODUCTION APPARATUS | 2007 |
|
RU2422429C2 |
| METHOD OF PRODUCING HIGH-QUALITY GRANULAR BISPHENOL A | 2006 |
|
RU2426718C2 |
| METHOD OF SYNTHESIS OF BISPHENOL-A | 1994 |
|
RU2119906C1 |
| METHOD AND APPARATUS FOR EXTRACTING BISPHENOL A | 2006 |
|
RU2417213C2 |
| METHOD OF PRODUCING DIPHENOL A | 2008 |
|
RU2451663C2 |
