Method for producing linear alpha-olefins (LAOs) through Fischer-Tropsch synthesis of solvent phase

A Fischer-Tropsch synthesis and solvent-phase technology, which is applied in the preparation of liquid hydrocarbon mixtures, hydrocarbon production from carbon oxides, organic chemistry, etc., can solve the difficulty of separation and circulation of supercritical solvents, the unclear prospect of industrialization, and the operating conditions of the process. Harsh and other problems, to achieve the effect of low production cost, wide application range and fast reaction rate

Active Publication Date: 2012-04-11
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the selection range of this supercritical fluid is very small, and the extraction capacity is limited. At the same time, the operating conditions of this process are harsh. Not only does it require high-pre

Method used

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  • Method for producing linear alpha-olefins (LAOs) through Fischer-Tropsch synthesis of solvent phase
  • Method for producing linear alpha-olefins (LAOs) through Fischer-Tropsch synthesis of solvent phase
  • Method for producing linear alpha-olefins (LAOs) through Fischer-Tropsch synthesis of solvent phase

Examples

Experimental program
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Effect test

Embodiment 1

[0094] Weigh 1.00 g of the Fischer-Tropsch synthesis industrial Fe-based catalyst (with a particle size of 0.2-0.5 mm), pour it into a quartz tube reactor with quartz wool sealed in the middle, then seal the other end of the catalyst with quartz wool, and then place the reactor Put it into the resistance furnace, and connect the gas inlet and outlet pipelines. The reaction temperature is set to 230°C, and the space velocity is set to 3000h -1 , pressure 1atm, synthesis gas H 2 / CO is 2.0 to start reverting. After 20 hours of reduction, the temperature began to drop naturally. When the temperature of the catalyst section of the reaction tube drops below 20°C, inject a small amount of solvent polyethylene glycol 1000 into the reaction tube to wet the catalyst before stopping the reduction.

[0095] The reduced catalyst was transferred to a 100ml continuously stirred reactor under the protection of polyethylene glycol 1000. After closing the reactor cover and tightening the s...

Embodiment 2

[0100] Weigh 1.00g of Fischer-Tropsch synthesis industrial Fe-based catalyst (particle size 0.2-0.5mm), pour it into a quartz tube reactor with quartz wool sealed in the middle, seal the other end of the catalyst with quartz wool, and then put the reactor into In the resistance furnace, and connect the gas inlet and outlet pipelines. The reaction temperature is set to 230°C, and the space velocity is set to 3000h -1 , pressure 1atm, synthesis gas H 2 / CO is 2.0 to start reverting. After 20 hours of reduction, the temperature began to drop naturally. When the temperature of the catalyst section of the reaction tube drops below 20°C, inject a small amount of solvent tetraethylene glycol into the reaction tube to wet the catalyst before stopping the reduction.

[0101] The reduced catalyst was transferred to a 100ml continuous stirring reactor under the protection of tetraethylene glycol. After closing the reactor cover and tightening the screws, connect the inlet and outlet ...

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Abstract

The invention discloses a solvent phase Fischer-Tropsch synthesis method. The method is characterized in that a Fischer-Tropsch synthesis reaction is carried out in a heterogeneous reaction system; a polar solvent is taken as the reaction medium; a traditional granular Fischer-Tropsch synthesis catalyst is suspended or soaked in the polar solvent phase to carry out the Fischer-Tropsch synthesis reaction; and as the generated hydrocarbon products are insoluble in the polar solvent, the phases are voluntarily split. The method can be used for producing linear alpha-olefins (LAOs) with various carbon numbers. By applying the method, the reaction products can rapidly leave the inner and outer surfaces of the catalyst to reduce the probability of readsorption and secondary reaction, thus improving the yield of the LAOs. The Fischer-Tropsch synthesis reaction can be carried out in the conventional Fischer-Tropsch synthesis reactor by using the common catalyst. By applying the method, the mass content of the LAOs in the reaction products is more than 70%, thus being very beneficial to separation and purification. Meanwhile, by applying the method, the CO conversion rate can be improved, the methane selectivity can be reduced and the yield of heavy hydrocarbons can be greatly increased.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis production method for producing linear alpha olefins (α-olefins), in particular to a solvent-phase Fischer-Tropsch synthesis method, especially a Fischer-Tropsch synthesis method using a polar solvent as a reaction medium. Background technique [0002] Linear α-olefins (LAOs) with different chain lengths have important industrial applications and are indispensable and important raw materials for the production of high-performance polyethylene products, high-grade lubricants, degradable detergents, and surfactants. [0003] The current main method for producing linear α-olefins is olefin oligomerization, which is too costly to produce linear α-olefins with an odd number of carbons that also have market value. The cost of Sasol to extract linear 1-hexene from the crude product of the Fischer-Tropsch Synthesis process is less than 40% of the cost of Philips' ethylene trimerization to produce 1-hexene, a...

Claims

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Application Information

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IPC IPC(8): C10G2/00C07C1/04C07C11/02
Inventor 李永旺高军虎吴宝山杨勇郝栩曹立仁
Owner SYNFUELS CHINA TECH CO LTD
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