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Catalyst for direct preparation of low carbon olefin from synthesis gas and preparation method thereof

A low-carbon olefin and catalyst technology, which is applied to the catalyst for the direct preparation of low-carbon olefins from synthesis gas and the field of preparation thereof, can solve the problems of easy flying temperature, low weight selectivity of low-carbon olefins, difficult reaction heat removal and the like

Active Publication Date: 2014-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by this invention is that the Fischer-Tropsch synthesis reaction exists in the prior art because the Fischer-Tropsch synthesis reaction is a strong exothermic reaction. The problem of low weight selectivity provides a new catalyst for Fischer-Tropsch synthesis of low-carbon olefins

Method used

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  • Catalyst for direct preparation of low carbon olefin from synthesis gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Get 606.03g of iron nitrate nonahydrate and 3.13g of gallium nitrate nonahydrate and dissolve in water to make solution I; 1076g of 50% manganese nitrate and 0.36g of titanium sulfate are dissolved in water to make solution, and then this solution is mixed with 414.1 A solution made of solid potassium carbonate of g is co-currently precipitated, and the precipitate is filtered and washed repeatedly with deionized water to remove excess impurity ions to obtain fresh and clean mixed precipitate II of manganese carbonate and titanium carbonate, and the solution I and The mixed precipitate II was mixed and beaten to obtain colloidal slurry III; 242.7g magnesium nitrate hexahydrate was dissolved in water to make a solution, and then the solution was co-flowed with 330g of 10% by weight ammonia water to precipitate, filter and wash to obtain fresh magnesium oxide precipitate, Add the magnesium oxide precipitate and 8.4g potassium hydroxide to the slurry III, mix and beat, and ...

Embodiment 2

[0026]The ferric nitrate nonahydrate of 606.03g and the gallium nitrate nonahydrate of 313.3g are dissolved in water and made into solution I; The manganese nitrate of 2.69g 50% and the titanium sulfate of 108g are dissolved in water and make solution, then this solution and 125.3 A solution made of solid potassium carbonate of 2 g is co-currently precipitated, and the precipitate is filtered and washed repeatedly with deionized water to remove excess impurity ions to obtain fresh and clean mixed precipitate II of manganese carbonate and titanium carbonate, and the solution I and The mixed precipitate II was mixed and beaten to obtain colloidal slurry III; 161.7g magnesium nitrate hexahydrate was dissolved in water to make a solution, and then the solution was co-flowed with 220g of 10% by weight ammonia water to precipitate, filter and wash to obtain fresh magnesium oxide precipitate, Add the magnesium oxide precipitate and 0.084g potassium hydroxide to the slurry III, mix and...

Embodiment 3

[0030] Get 367.43g ferric citrate and 313.3g gallium nitrate nonahydrate and dissolve in water to make solution I; 2.69g 50% manganese nitrate and 108g titanium sulfate are dissolved in water to make solution, then this solution is mixed with 125.3g A solution made of solid potassium carbonate is co-currently precipitated. The precipitate is filtered and washed repeatedly with deionized water to remove excess impurity ions to obtain a fresh and clean mixed precipitate II of manganese carbonate and titanium carbonate. The solution I is mixed with Precipitate II was mixed and beaten to obtain colloidal slurry III; 3395.7g magnesium nitrate hexahydrate was dissolved in water to make a solution, and then the solution was mixed with 4620g of 10% by weight ammonia water to precipitate, filter and wash to obtain fresh magnesium oxide precipitate. The magnesium oxide precipitate and 0.084g potassium hydroxide were added to the slurry III, mixed and beaten, and the pH value of the slurr...

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Abstract

The invention relates to a catalyst for direct preparation of low carbon olefin from synthesis gas and a preparation method thereof, mainly solves the problems that a strong exothermic Fischer-Tropsch synthesis reaction in the prior art causes difficult heat removal and easy temperature runaway, easy deactivation of catalyst, low weight selectivity of low carbon olefin when a fixed bed reactor is used. The catalyst provided by the present invention comprises the following components by weight: a) 10-70 parts of a carrier, the which is at least one selected from the group consisting of oxides of Mg and Ca; b) 30-90 parts of an active component, which contains, by atomic ratio, a composition with chemical formula of Fe100AaBbCcOx, wherein A is selected from Mn and Mo, B is selected from Ga and In, and C is selected from an alkali metal. The technical scheme well solves the problem and is applicable to industrial production of Fischer-Tropsch synthesis of low carbon olefins.

Description

technical field [0001] The invention relates to a catalyst for directly preparing low-carbon olefins from synthesis gas and a preparation method thereof. Background technique [0002] Fischer-Tropsch (Fascher-Tropsch) synthesis is the use of synthesis gas (mainly composed of CO and H 2 ) The process of synthesizing hydrocarbons under the action of a catalyst is an important way for the indirect liquefaction of coal and natural gas. This method was invented by German scientists Frans Fischer and Hans Tropsch in 1923, that is, CO undergoes a heterogeneous catalytic hydrogenation reaction on a metal catalyst to generate a mixture mainly of linear alkanes and alkenes. [0003] Germany carried out the research and development of Fischer-Tropsch synthesis in the 1920s, and realized industrialization in 1936. After World War II, it was closed because it could not compete with the oil industry economically; South Africa has abundant coal resources, but oil resources Insufficient p...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/881C07C11/04C07C11/06C07C1/04
CPCY02P20/52
Inventor 庞颖聪陶跃武宋卫林李剑锋
Owner CHINA PETROLEUM & CHEM CORP
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