초록 ▼

Methods and systems for preparing dialkyl ketones are described herein. The methods and systems incorporate the novel use of a high shear device to promote dispersion and solubility of carbon monoxide and hydrogen with the olefins (e.g. ethylene) in a liquid solvent. The high shear device may allow

Methods and systems for preparing dialkyl ketones are described herein. The methods and systems incorporate the novel use of a high shear device to promote dispersion and solubility of carbon monoxide and hydrogen with the olefins (e.g. ethylene) in a liquid solvent. The high shear device may allow for lower reaction temperatures and pressures and may also reduce reaction time.

대표청구항 ▼

What is claimed is: 1. A method of making a dialkyl ketone comprising: a) introducing hydrogen gas and carbon monoxide gas into a liquid stream to form a gas-liquid stream, said liquid stream comprising an olefin dissolved in a liquid solvent; b) flowing the gas-liquid stream through a high shear d

What is claimed is: 1. A method of making a dialkyl ketone comprising: a) introducing hydrogen gas and carbon monoxide gas into a liquid stream to form a gas-liquid stream, said liquid stream comprising an olefin dissolved in a liquid solvent; b) flowing the gas-liquid stream through a high shear device so as to form a dispersion with gas bubbles less than about 1 μm; and c) contacting the gas-liquid stream with a catalyst in a reactor to carbonylate the olefin with the hydrogen gas and the carbon monoxide to form a dialkyl ketone. 2. The method of claim 1 further comprising introducing a catalyst into the liquid olefinic stream. 3. The method of claim 1 wherein the catalyst comprises iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium and platinum or combinations thereof. 4. The method of claim 1 wherein the liquid stream comprises ethylene, propylene, butene, or combinations thereof. 5. The method of claim 1 wherein the liquid solvent comprises a hydrocarbon solvent, a nitrile solvent, an aromatic solvent, or combinations thereof. 6. The method of claim 1 wherein the dialkyl ketone has the formula: R—(C═O)—R, wherein R is an alkyl group having from 1 to 10 carbon atoms and R may be branched or unbranched. 7. The method of claim 1, wherein the gas bubbles have an average diameter of no more than about 100 nm. 8. The method of claim 1, wherein (b) comprises subjecting said gas-liquid stream to high shear mixing at a tip speed of at least about 23 m/sec. 9. The method of claim 1, wherein (b) comprises subjecting said gas-liquid stream to a shear rate of greater than about 20,000 s−1. 10. The method of claim 1, wherein forming said dispersion comprises an energy expenditure of at least about 1000 W/m3.