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Fluidizer and fluidization method for preparing ethylene by ethanol dehydration

A technology of ethanol dehydration and fluidization equipment, which is applied in the field of equipment for preparing hydrocarbons from non-hydrocarbon compounds, which can solve the problems of increased side reactions and decreased ethylene purity, and achieve the effect of improving purity and ensuring heat balance

Active Publication Date: 2012-08-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The main problem of using a fluidized bed reactor for ETE is that the regenerated catalyst entrains flue gas, which contains a large amount of impurity gases such as nitrogen, oxygen, carbon dioxide, carbon monoxide, etc., and the regenerated catalyst entrained with flue gas returns to the fluidized bed for reaction The device will increase the side reaction and greatly reduce the purity of ethylene in the product, requiring expensive cryogenic separation to improve its purity

Method used

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  • Fluidizer and fluidization method for preparing ethylene by ethanol dehydration
  • Fluidizer and fluidization method for preparing ethylene by ethanol dehydration
  • Fluidizer and fluidization method for preparing ethylene by ethanol dehydration

Examples

Experimental program
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Embodiment 1

[0051] Relevant test among the embodiment 1 is carried out on the medium-sized device of the ethanol dehydration making ethylene (ETE) by computer real-time control, and the processing capacity of this device is 0.4t / d, and ethanol raw material is the water containing 5% (volume fraction) Ethanol, the weight hourly space velocity of ethanol is 1.0h -1 , fluidized bed reaction temperature 360 ​​° C, reaction pressure 0.2MPa (gauge pressure). The catalyst is MMC-2 catalyst (800°C, 100% steam aging for 17 hours) produced by Sinopec Qilu Catalyst Company. The preheating temperature of the ethanol feedstock is 360°C, the temperature of the recycled catalyst entering the catalyst mixing chamber is 300°C, and the temperature of the regenerated catalyst from the degassing tank of the regenerated catalyst is 700°C, and the regenerated catalyst and the recycled catalyst are mixed in the catalyst mixing chamber The temperature is 370°C. The weight ratio of recycled spent catalyst from ...

Embodiment 2

[0057] The device used in the experiment of embodiment 2, ethanol raw material and catalyst are all the same as embodiment 1.

[0058] The weight hourly space velocity of ethanol is 1.5h -1 , the fluidized bed reaction temperature is 370°C, and the reaction pressure is 0.17MPa (gauge pressure). The preheating temperature of the ethanol feedstock is 380°C, the temperature of the recycled catalyst entering the catalyst mixing chamber is 300°C, and the temperature of the regenerated catalyst from the degassing tank of the regenerated catalyst is 690°C, and the regenerated catalyst and the recycled catalyst are mixed in the catalyst mixing chamber The temperature is 390°C. The weight ratio of the recycled spent catalyst from the catalyst internal circulation pipe to that from the regenerated catalyst degassing tank was about 3.3:1.

[0059] The product distribution is shown in Table 1. From Table 1, it can be seen that the conversion rate of ethanol is 99.8%, and the purity of e...

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Abstract

The invention relates to a fluidized device for producing ethylene by ethanol dehydration, which comprises a fluidized bed reactor, a regenerator, a catalyst mixing chamber, a catalyst riser, a spent catalyst inner circulating pipe, a stripper and a regenerated catalyst degassing tank, wherein, the fluidized bed reactor and the regenerator are connected by spent catalyst conveying pipes, the fluidized bed reactor and the catalyst mixing chamber are connected by the catalyst riser, the stripper and the catalyst mixing chamber are connected by the catalyst inner circulating pipe, the regenerated catalyst degassing tank and the regenerator are connected by regenerated catalyst conveying pipes and the regenerated catalyst degassing tank and the catalyst mixing chamber are connected by the regenerated catalyst conveying pipes. The fluidized device, through adding the regenerated catalyst degassing tank, effectively removes flue gas taken by the regenerated catalyst and greatly improves thepurity of ethylene in the product. The regenerator is arranged independently or a catalytic cracking regenerator is shared with a catalytic cracking device in the filed of petroleum refining.

Description

technical field [0001] The present invention pertains to an apparatus and method for the preparation of hydrocarbons from a non-hydrocarbon compound, and more particularly to an apparatus and method for the dehydration of an oxygenate to produce ethylene. Background technique [0002] Ethylene is the most important basic raw material in the petrochemical industry. At present, about 75% of petrochemical products come from ethylene. At present, the world's ethylene production capacity has reached 112.9055 million tons per year, and it is expected that the world's ethylene production capacity will reach 144.455 million tons per year in 2012. In 2010, my country's ethylene equivalent demand is expected to be 25.7 million tons per year, the production capacity is 13.89 million tons per year, and the self-sufficiency rate is only 54%. Therefore, whether it is domestic or foreign, there is still a lot of room for the development of the ethylene market. [0003] There are many ways...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/24C07C11/04B01J8/24
CPCY02P20/584
Inventor 李强杨克勇常学良张久顺鲁维民邢波郭湘波龙军舒兴田谢文华吴治国
Owner CHINA PETROLEUM & CHEM CORP
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