4-(Vinyloxy)butan-1-ol
Bezeichnung:4-(Vinyloxy)butan-1-ol
CAS-Nr17832-28-9
Englisch Name:1,4-Butanediol vinyl ether
CBNumberCB8400446
SummenformelC6H12O2
Molgewicht116.16
MOL-Datei17832-28-9.mol
Synonyma
4-(Vinyloxy)butan-1-ol
4-(Vinyloxy)butan-1-ol physikalisch-chemischer Eigenschaften
| Schmelzpunkt | -33 °C |
| Siedepunkt | 95 °C/20 mmHg (lit.) |
| Dichte | 0.939 g/mL at 25 °C (lit.) |
| Dampfdruck | 0.3 hPa (20 °C) |
| Brechungsindex | n |
| Flammpunkt | 185 °F |
| storage temp. | Store at <= 20°C. |
| Löslichkeit | 75g/l |
| pka | 15.04±0.10(Predicted) |
| Aggregatzustand | clear liquid |
| Wichte | 0.93 |
| Farbe | Colorless to Light yellow |
| Explosionsgrenze | 1.4-9.9%(V) |
| Wasserlöslichkeit | 75 g/L (20 ºC) |
| LogP | 0.43 at 25℃ |
| CAS Datenbank | 17832-28-9(CAS DataBase Reference) |
| EPA chemische Informationen | 1-Butanol, 4-(ethenyloxy)- (17832-28-9) |
| Kennzeichnung gefährlicher | Xn |
| R-Sätze: | 20/21/22-36/37/38-22-52/53 |
| S-Sätze: | 26-36-24/25-61 |
| RIDADR | NA 1993 / PGIII |
| WGK Germany | 1 |
| Selbstentzündungstemperatur | 225 °C DIN 51794 |
| HS Code | 2909 49 80 |
| Toxizität | LD50 orally in Rabbit: 1738 mg/kg LD50 dermal Rat > 2000 mg/kg |
Since 1,4-butanediol contains two hydroxyl groups and the product contains active vinyl ether functional groups, some side reactions will occur. For example, further reaction of HBVE with acetylene to generate divinyl ether, and self-condensation reaction of HBVE to form a cyclic acetal. A superbase catalytic system CsF–NaOH was developed for the preparation of HBVE at a temperature of 138–14 °C and under initial acetylene pressure of 1.0–1.2 MPa. The conversion of 1,4-butanediol was 100% and the total yield of the vinyl ethers was 80% at catalyst dosage (7 mol% CsF and 7 mol% NaOH based on 1,4-butanediol) and after reaction for 3 h. Some researchers also developed heterogeneous catalysts for the reaction of acetylene and 1,4-butanediol to obtain HBVE. Potassium hydroxide was supported on carriers such as aluminum oxide, molecular sieves, silica gel and zirconia.