Carbonic acid, dibutyl ester
Dibutyl carbonate
CAS: 542-52-9
Molecular Formula: C9H18O3
Carbonic acid, dibutyl ester - Names and Identifiers
| Name | Dibutyl carbonate |
| Synonyms | NSC 8462 AI3-30046 BUTYL CARBONATE Dibutyl carbonate DIBUTYL CARBONATE n-Butyl carbonate DI-N-BUTYL CARBONATE carbonicaciddibutylester Carbonicacid,dibutylester Carbonic acid, dibutyl ester CARBON DIOXIDEDI-N-BUTYL ESTER Carbonic acid, di-n-butyl ester |
| CAS | 542-52-9 |
| EINECS | 208-816-0 |
| InChI | InChI=1/C9H18O3/c1-3-5-7-11-9(10)12-8-6-4-2/h3-8H2,1-2H3 |
Carbonic acid, dibutyl ester - Physico-chemical Properties
| Molecular Formula | C9H18O3 |
| Molar Mass | 174.24 |
| Density | d420 0.9251; d425 0.9388 |
| Melting Point | <25 °C |
| Boling Point | bp 206.6° |
| Flash Point | 76°C |
| Vapor Presure | 0.228mmHg at 25°C |
| Appearance | clear liquid |
| Color | Colorless to Almost colorless |
| Storage Condition | 2-8°C |
| Refractive Index | nD20 1.4117 |
Carbonic acid, dibutyl ester - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | di-n-butyl carbonate (DBC) is a colorless liquid with large molecular weight (M = 174.24), high flash point and strong oxidation resistance. as a non-aqueous electrolyte, it can fully improve the electrochemical stability and safety of lithium batteries. DBC, as an organic symmetric dialkyl ester containing carbonyl and butyl groups, can also be used as a carbonylating agent or alkylating reagent for organic synthesis. |
| Application | DBC is also considered to be a substitute for phosgene for polycarbonate synthesis. DBC can also react with organic amines to prepare N-substituted organic carbamates. Further thermal cracking of organic carbamates can achieve non-phosgene route to prepare organic isocyanates. In this process, DBC is used as a carbonyl source and alkylation reagent. The characteristics of green and safe. In addition, DBC can also be used as a matrix material for lubricating oil, metal degreasing, leather treatment and other industries, and as a solvent for expanded polystyrene. |
| preparation | the implementation process of a method for preparing di-n-butyl carbonate by alcoholysis of urea is as follows: metal oxide catalyst, urea and n-butanol are added into a high-pressure reactor, then the air in the reactor is purged with nitrogen, the flow rate of nitrogen or carbon dioxide in the purging gas is adjusted to 20-200L/kg urea · hour, and the temperature is increased to 130-150 ℃ in the first stage, the reaction is 2~6h, then the temperature is increased to 180~220 ℃, and the reaction is 10~20h. After the reaction is finished, after the reaction liquid is cooled, the catalyst is recovered by sedimentation or filtration separation. The obtained catalyst can be reused after being simply cleaned and dried by ethanol or acetone. The products after the reaction are analyzed qualitatively and quantitatively by gas chromatography (GC) and gas chromatography (GC-MS). Due to their large boiling point difference, n-butanol, DBC and NBBC can conveniently separate the three by decompression distillation at different temperatures, I .e. n-butanol is recovered by decompression separation at 50~70 ℃, DBC (including <1% BC) is recovered by decompression separation at 90~110 ℃, and the remaining small amount of solid is NBBC. The purity of the resulting DBC product is> 99.0%. |
Last Update：2024-04-10 22:29:15
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