Iron-based catalyst for synthesizing low carbon olefin, and preparation method thereof

A technology of iron-based catalysts and low-carbon olefins, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc. Problems such as low sensitivity and difficulty in removing heat from the reaction

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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, providing a new iron-based catalyst for Fischer-Tropsch synthesis of low-carbon olefins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Get 606.03g ferric nitrate nonahydrate and 0.22g rhenium trichloride to be dissolved in water and make solution I; 2.69g weight content is that the manganese nitrate of 50% and the chromium nitrate nonahydrate of 300g are dissolved in water and make solution, then This solution and the solution that the solid potassium carbonate of 156.6g is made cocurrently precipitate, and this precipitate is filtered and washed repeatedly with deionized water, and obtains fresh and clean mixed precipitate II of manganese carbonate and chromium carbonate after removing unnecessary impurity ions, The solution I was mixed with the mixed precipitate II to obtain a colloidal slurry III; 49.37g of SiO with a weight content of 40% 2 The sol and 0.084g potassium hydroxide were added to the slurry III, mixed and beaten, and the pH value of the slurry was adjusted to 5 with ammonia water at the same time to obtain a uniform slurry IV (solid content 45wt%), the slurry was spray-dried and molded...

Embodiment 2

[0024] Get 606.03g ferric nitrate nonahydrate and 53.90g technetium tetrachloride to dissolve in water and make solution I; 1076g weight content is 50% manganese nitrate and 1.32g ammonium heptamolybdate are dissolved in water and make solution, then This solution and the solution that the solid sodium carbonate solution of 416.64g is made into co-current precipitation, this precipitate is filtered and washed repeatedly with deionized water, after removing unnecessary impurity ions, obtain fresh and clean mixed precipitate II of manganese carbonate and molybdenum carbonate, Mix the solution I with the mixed sediment II and beat to obtain a colloidal slurry III; 1261g of TiO with a weight content of 20% 2The sol and 20.47g cesium nitrate were added to the slurry III, mixed and beaten, and the pH value of the slurry was adjusted to 1 with dilute nitric acid at the same time to obtain a uniform slurry IV (solid content 15wt%), the slurry was spray-dried and molded, the inlet temp...

Embodiment 3

[0028] Get 367.43g of ferric citrate and 0.44g of rhenium trichloride dissolved in water to make solution I; 1.41g of ammonium metavanadate and 270g of chromium nitrate nonahydrate are dissolved in water to make a solution, and then this solution is mixed with 110g of solid The solution made of sodium carbonate co-flows to precipitate, 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 vanadium carbonate and chromium carbonate, and the mixed precipitate II of solution I and mixed precipitate II Mix and beat to obtain colloidal slurry III; 443g SiO with a weight content of 40% 2 The sol and 6g of sodium hydroxide were added to the slurry III, mixed and beaten, and the pH value of the slurry was adjusted to 3 with dilute nitric acid at the same time to obtain a uniform sol-like slurry IV that was uniformly dispersed and would not separate after a long period of time (solid con...

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PUM

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Abstract

The invention relates to an iron-based catalyst for the Fischer-Tropsch synthesis of low carbon olefin, and a preparation method thereof, and mainly solves the problems of easy inactivation and low mass selectivity of the target product low carbon olefin of catalysts in the Fischer-Tropsch synthesis of low carbon olefin in the prior art. The catalyst comprises 10-70 parts by weight of a carrier and 30-90 parts by weight of an active component, the carrier is at least one selected from Si and Ti oxides, the active component contains a composition with the chemical formula of Fe100AaBbCcOx (in atomic ratio), A is one selected from V and Mn, B is one selected from Cr and Mo, and C is one selected from alkali metals. The iron-based catalyst well solves the problems, and can be used in the industrial production for the Fischer-Tropsch synthesis of low carbon olefin.

Description

technical field [0001] The invention relates to an iron-based catalyst for Fischer-Tropsch synthesis of light carbon olefins and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the demand for petroleum products is increasing day by day. my country's energy is characterized by rich coal but little gas and oil, and the environmental pollution caused by the direct combustion of coal has also been paid more and more attention. The development of the process of converting coal / natural gas into petroleum products through synthesis gas can not only reduce the dependence on foreign countries for energy, but also has important significance for solving the environmental pollution caused by coal burning. [0003] 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 indire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/86C07C1/04C07C11/02
Inventor 庞颖聪陶跃武李剑锋宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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