Slurry bubble column technology for preparing ethylene through acetylene hydrogenation and device thereof

A technology of acetylene hydrogenation and slurry bed, which is applied in the fields of hydrogenation hydrocarbon production, bulk chemical production, organic chemistry, etc. It can solve the problems that the bed temperature cannot be effectively controlled, the catalyst regeneration time increases, and the treatment capacity of the bed is affected. Achieve the effect of long continuous operation time, increase reaction production capacity, increase reaction conversion rate and selectivity

Inactive Publication Date: 2012-06-13
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher the concentration of the reactant acetylene, the faster the reaction speed and the more heat release, the reactor is prone to "flying temperature", the bed temperature cannot be effectively controlled, and the catalyst is prone to serious problems such as sintering;
[0007] (2) The fixed bed catalytic hydrogenation is used for the reaction, and the heat exchange capacity is poor
In order to remove "green oil", the regeneration time of the catalyst in the fixed bed reactor is increased, which seriously affects the treatment capacity of the bed

Method used

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  • Slurry bubble column technology for preparing ethylene through acetylene hydrogenation and device thereof
  • Slurry bubble column technology for preparing ethylene through acetylene hydrogenation and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) In a slurry bed reactor with a height-to-diameter ratio of 11:1, add 80ml of water from the feed port 6 on the upper part of the reactor, and then add a particle size of 50mm and a carrier of Al 2 o 3 , 4g of catalyst particles with a Pd content of 0.3 wt%, and the inert gas N was introduced from the reaction gas inlet 1 2 carry out atmosphere replacement;

[0027] (2) Heat the slurry bed reactor to 60°C;

[0028] (3) Pass the mixture of acetylene and hydrogen with a space velocity of 5000mL / (g-cat h) and a volume ratio of 1:1 into the slurry bed reaction through the gas distributor from the reaction gas inlet 1 at the bottom of the slurry bed reactor device, react at 90°C;

[0029] (4) The reaction product and unreacted raw material gas are discharged from the top of the slurry bed reactor and enter the separation section for separation to obtain ethylene products. The unreacted raw material gas is mixed with fresh raw material gas and re-enters the reactor for ...

Embodiment 2

[0032] (1) In a slurry bed reactor with a height-to-diameter ratio of 14:1, add 120ml of water from the feed port 6 on the upper part of the reactor, and then add SiO with a particle size of 100mm and a carrier 2 , 6g of catalyst particles with a loading of 0.03 wt% Pt, and the inert gas N was introduced from the reaction gas inlet 1 2 carry out atmosphere replacement;

[0033] (2) Heat the slurry bed reactor to 80°C;

[0034] (3) Pass the acetylene and hydrogen mixture with a space velocity of 1000mL / (g-cat h) and a volume ratio of 1:2 into the slurry bed reaction through the gas distributor from the reaction gas inlet 1 at the bottom of the slurry bed reactor device, react at 80°C;

[0035] (4) The reaction product and unreacted raw material gas are discharged from the top of the slurry bed reactor and enter the separation section for separation to obtain ethylene products. The unreacted raw material gas is mixed with fresh raw material gas and re-enters the reactor for re...

Embodiment 3

[0038] (1) In a slurry bed reactor with a height-to-diameter ratio of 15:1, add 200ml of water from the feed port 6 on the upper part of the reactor, and then add a particle size of 200mm, a carrier of activated carbon, and a Ni load of 1.0 wt%. 12g catalyst particles, and pass inert gas N from reaction gas inlet 1 2 carry out atmosphere replacement;

[0039] (2) Heat the slurry bed reactor to 90°C;

[0040] (3) Pass the acetylene and hydrogen mixture with a space velocity of 10000mL / (g-cat h) and a volume ratio of 1:3 into the slurry bed reaction through the gas distributor from the reaction gas inlet 1 at the bottom of the slurry bed reactor device, react at 100°C;

[0041] (4) The reaction product and unreacted raw material gas are discharged from the top of the slurry bed reactor and enter the separation section for separation to obtain ethylene products. The unreacted raw material gas is mixed with fresh raw material gas and re-enters the reactor for recycling.

[0042...

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Abstract

Provided are slurry bubble column technology for preparing ethylene through acetylene hydrogenation and a device thereof. The slurry bubble column technology includes adding water and then catalyst into a reactor, filling inert gases for replacing, heating, leading gas mixture of acetylene and hydrogen to enter in the reactor for reacting from the bottom of the reactor through a gas distributor, finally exhausting reaction products and unreacted feed gases from the top of the reactor, and separating to obtain the ethylene. The unreacted feed gases and the feed gases are mixed and then enter the reactor again for reacting. The reactor comprises a reaction gas inlet at the bottom, the gas distributor and a material liquid exhaust port, a reactor barrel body is arranged on an expended section on the upper portion of a slurry bubble column reactor, and a catalyst feeding port and a gas outlet are arranged at the top of the reactor. The slurry bubble column for preparing the ethylene through the acetylene hydrogenation is simple in structure, overcomes the phenomenon of temperature runaway in a fixed bed reactor and improves the conversion rate and selectivity of the reaction, and the operation is easy to control.

Description

technical field [0001] The invention relates to a reactor and a method for preparing ethylene by hydrogenation of acetylene, and further relates to a process and a device for preparing ethylene by hydrogenation of high-concentration acetylene in a slurry bed. Background technique [0002] Ethylene is the most basic raw material for the production of the three major synthetic materials and organic chemical products. Its products are widely used in national economy, people's life, national defense and other fields, and are the "mother of organic synthesis". The production of ethylene is mainly produced by the cracking of petroleum hydrocarbons. The ethylene output has become a symbol to measure the development level of a country's petrochemical industry, and its production capacity is regarded as the embodiment of a country's economic strength. Facing the shortage of oil resources and rising international oil prices, the source of raw materials has become a bottleneck in the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/22C07C11/04C07C5/09
CPCY02P20/52
Inventor 段东红刘世斌李一兵赵俊田牛杰张忠林郝晓刚
Owner TAIYUAN UNIV OF TECH
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