Patent ID: 8163967
Filing Date: 2012-04-24
Classification: C07C,C10G,Y10S

Abstract:
1. A process for producing light olefins from an oxygenate-containing feedstock, said process comprising: contacting the oxygenate-containing feedstock in an oxygenate conversion reactor with an oxygenate conversion catalyst and at reaction conditions effective to convert the oxygenate-containing feedstock to form an oxygenate conversion effluent stream comprising fuel gas hydrocarbons, light olefins, C absorbing at least a portion of the remaining oxygenate material from the effluent stream in a vapor-liquid adsorber, including at least a portion of the quantity of carbonyls, in a quantity of water to form an oxygenate-rich water process stream, and a hydrocarbon product stream having less than 110 mol ppm of carbonyls and acetaldehyde; and stripping oxygenate material from the oxygenate-rich water process stream to form a recycle water stream; with at least a portion of the recycle water stream water forming said quantity of water used to absorb at least a portion of the remaining oxygenate material and said process additionally comprising said quantity of water having been treated to contain less than 150 mol ppm of carbonyls wherein said quantity of water having been treated to contain less than 150 mol ppm of carbonyls comprises said stripping of oxygenate material from the oxygenate-rich water process stream being performed at stripping conditions whereby the recycle water stream contains less than 150 mol ppm of carbonyls.