Importance

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Abstract

Processes are disclosed for the production of liquefied petroleum gas (LPG) hydrocarbons, utilizing both alcohol (e.g., methanol) synthesis and in situ dehydration of the alcohol to hydrocarbons, and particularly propane and/or butane. Operational adjustments and/or variations, involving activation of LPG synthesis catalyst systems at relatively high temperatures, followed by initial operation at relatively low temperatures, surprisingly lead to improvements in the stability of such catalyst systems. These improvements are often in conjunction with other benefits, for example greater selectivity and/or per-pass yield, with such improvements and benefits resulting from the ability to operate at reduced temperatures. Problems typically encountered in the art due to catalyst instability, such as the need for frequent replacement and/or regeneration, are thereby potentially reduced or even eliminated.

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First Claim