Technology for high efficiently recycling methanol from process water in device for preparing propylene from methanol
A technology for producing propylene from methanol and recovering methanol is applied in the preparation of hydroxyl compounds, the preparation of organic compounds, and the separation/purification of hydroxyl compounds. The effect of high concentration multiple, significant economic and environmental benefits
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[0017] The invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] The invention relates to a method for efficiently removing and recovering methanol from methanol-containing process aqueous solution of methanol-to-propylene (MTP), and generating process steam simultaneously.
[0019] The process for efficiently recovering methanol from the process water of the methanol to propylene plant is characterized in that it is equipped with a methanol recovery / process steam column 1, that is, a combined column 1, and is equipped with a reboiler 2, a condenser 3, a reflux tank 4, and a reflux pump 5. The material containing methanol and process water enters from the middle of combined tower 1, the operating pressure range at the top of the tower is 0.6-1.8MPaA, the temperature at the top of the tower is 85-145°C, and the operating temperature at the bottom of the tower is 140-190°C. The upper part is a packing...
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