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Catalyst for preparation of linear alpha-olefins from synga as well as preparation and application of catalyst

An olefin catalyst and catalyst technology, applied in the field of iron-based catalyst preparation, achieves the effects of easy operation, simple preparation process and uniform distribution

Inactive Publication Date: 2019-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports in the literature on the direct production of high value-added LAO from syngas.

Method used

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  • Catalyst for preparation of linear alpha-olefins from synga as well as preparation and application of catalyst
  • Catalyst for preparation of linear alpha-olefins from synga as well as preparation and application of catalyst
  • Catalyst for preparation of linear alpha-olefins from synga as well as preparation and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The iron catalyst preparation process is as follows:

[0028] Dissolve 2.5 g of glucose and 3.05 g of ferric nitrate nonahydrate in 30 mL of deionized water, and stir vigorously. The resulting mixed solution was transferred to a 50mL hydrothermal synthesis reactor with a polytetrafluoroethylene liner. The reaction kettle is sealed and transferred to a hydrothermal synthesis device (also called an incubator). The condition control of the hydrothermal synthesis process is 120° C. for 20 hours. The obtained product distribution was repeatedly washed several times with deionized water and absolute ethanol. Finally, the product was dried for more than 12 hours, and it was taken out, which was recorded as Fe / C. The composite powder is obtained by mechanically mixing potassium chloride, calcium carbonate and magnesium oxide according to the weight ratio of K:Ca:Mg=3:1:0.3 by means of grinding. 1.0 g of Fe / C and 0.15 g of composite powder were mechanically mixed again by me...

Embodiment 2

[0032] The iron catalyst preparation process is as follows:

[0033] Dissolve 2.5 g of glucose and 3.05 g of ferric nitrate nonahydrate in 30 mL of deionized water, and stir vigorously. The resulting mixed solution was transferred to a 50mL hydrothermal synthesis reactor with a polytetrafluoroethylene liner. The reaction kettle is sealed and transferred to a hydrothermal synthesis device (also called an incubator). The condition control of the hydrothermal synthesis process is 120° C. for 20 hours. The obtained product distribution was repeatedly washed several times with deionized water and absolute ethanol. Finally, the product was dried for more than 12 hours, and it was taken out, which was recorded as Fe / C. 1.0 g of Fe / C and 0.15 g of potassium carbonate powder were mechanically mixed again by grinding, and the prepared catalyst was recorded as Fe / C-K.

[0034]K exists in the Fe / C-K catalyst as a separate electron aid. The ratio of each component is 14% (Fe), 3.7% (K...

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Abstract

The invention relates to a preparation method of a catalyst for preparation of linear alpha-olefins from a syngas, and aims to solve the problems that selectivity of alpha-olefins in a conventional syngas conversion process is low and the selectivity is difficult to control. According to the preparation method provided by the invention, one or more alkali metal elements selected from K, Mg, Ca andthe like are used as an organic auxiliary agent of the iron catalyst to prepare the high-efficiency catalyst for syngas conversion, the carbon chain growth ability is enhanced, selectivity of the linear alpha-olefin product is greatly improved, and the method is a simple and high-efficiency preparation route; and the preparation method of the catalyst provides a novel idea for effective production of the linear alpha-olefins.

Description

technical field [0001] The invention designs a method for preparing a catalyst for producing linear α-olefins from synthesis gas, and in particular relates to a method for preparing an iron-based catalyst that can be used in conversion reactions of synthesis gas. Background technique [0002] As the leader of the petrochemical industry, olefins occupy a very important position in the national economy. Olefins can be divided into low-carbon and high-carbon olefins according to the length of the carbon chain. Low-carbon olefins mainly refer to ethylene and propylene, which are the basic organic raw materials for synthetic plastics, fibers and other chemical products. Higher olefins generally refer to olefins with a carbon number of 4 or more, especially alpha-olefins that can be used to produce high value-added fine chemicals are the most important. α-olefins refer to monoolefins with double bonds at the end of the molecular chain (R-CH=CH 2 ), wherein R is an alkyl group. ...

Claims

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Application Information

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IPC IPC(8): B01J23/78C07C1/04C07C11/02
Inventor 孙剑葛庆杰纪学玮郭立升
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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