Method for producing ethylene from ethanol by combination hydrocarbons catalytic conversion

Abstract

Disclosed is a combined hydrocarbons catforming method to produce ethane from ethanol. Ethanol raw materials contact with Y zeolite catalysts and the reaction products flow to a segregator, getting coked catalysts and target ethane; hydrocarbon raw materials contact with Y zeolite catalysts and the reaction products flow to a segregator, getting spent catalysts and reaction effluent and the reaction effluent is further separated to get gas and liquid products such as gasoline; all or part of the coked catalysts or spent catalysts get into a reactivator for coke-burning regeneration; the regenerated catalysts are divided into two parts, one part returns to contact with the hydrocarbon raw materials and the other part, after cooling, returns to contact with the ethanol raw materials. The method properly uses the surplus heat energy in the course of hydrocarbons catalytic conversion, solving the problem of heat energy supply in ethanol conversion, ensuring that the ethanol can be converted to ethane continuously. The content of ethene in the gas products of the ethanol catforming exceeds 95 percent and the conversation rate of ethanol can reach 99 percent.

Description

technical field

[0001] The invention relates to a method for producing ethylene from ethanol, more specifically, the invention belongs to a method for producing ethylene from ethanol through combined catalytic conversion of hydrocarbons. Background technique

[0002] Humanity has just entered the 21st century, and the contradiction between supply and demand of global oil has become increasingly prominent. With the increasing demand for various petroleum and petrochemical products, the price of crude oil in the market continues to rise. This situation has led to high market prices of low-carbon olefins (especially ethylene, propylene) and low-molecular ethers (such as dimethyl ether, ether, etc.), which are important chemical products that use petroleum and petrochemical products as raw materials. Therefore, finding other alternative raw materials such as agricultural and forestry by-product ethanol, methanol produced from natural gas or coal to produce low-carbon olefins an...

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