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Catalyst and process for directly preparing low-carbon olefin and co-production of alpha-olefin from synthetic gas

A low-carbon olefin and synthesis gas technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, and hydrocarbon production from carbon oxides, can solve the problem of not paying attention to high value-added α-olefins , complex, expensive preparation of catalysts, etc., to achieve the effect of improving flexibility and anti-risk ability, good selectivity, and low production cost

Inactive Publication Date: 2015-04-08
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical solutions disclosed in these patent documents have achieved different degrees of progress in the direction of direct production of olefins from syngas, but these patents all focus on the research on the direct production of low-carbon olefins from syngas, mainly ethylene and propylene, and do not pay attention to high-level olefins. Value-added alpha-olefins
The direct production of olefins from syngas belongs to the category of Fischer-Tropsch synthesis, its chain growth obeys the polymerization mechanism, and the product selectivity follows the Anderson-Schulz-Flory distribution. Therefore, if the selectivity to low-carbon olefins is pursued too high, it will inevitably cause Problems that restrict the industrialization of the process, such as the catalyst is too expensive or the preparation is too complicated, and the by-products such as methane / carbon dioxide increase sharply

Method used

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  • Catalyst and process for directly preparing low-carbon olefin and co-production of alpha-olefin from synthetic gas
  • Catalyst and process for directly preparing low-carbon olefin and co-production of alpha-olefin from synthetic gas

Examples

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Effect test

Embodiment 1

[0024] This example provides a catalyst for direct synthesis of low-carbon olefins and co-production of α-olefins from syngas, the weight percentage of each component is: Fe 15%, MnO 10%, K 2 O 3%, Al 2 o 3 72%.

[0025] This embodiment also provides a process for direct synthesis of low-carbon olefins and co-production of α-olefins from syngas, the process of which is as follows figure 1 As shown, the process includes the following steps:

[0026] H 2 The / CO volume ratio is adjusted to 2:1, and then the sulfur content of the gas is lower than 0.1ppm through deep purification, and the effective synthesis gas is obtained as the raw material gas;

[0027] Before the reaction, pass through hydrogen to activate the catalyst for 4 hours at 450°C;

[0028] After activation, the raw material gas (which can be preheated to 450°C through a heat exchanger) is passed into the synthesizer to react with the catalyst. The reaction temperature is 320°C, the pressure is 1.0MPa, and the ...

Embodiment 2

[0031] This example provides a catalyst for direct synthesis of low-carbon olefins and co-production of α-olefins from syngas, the weight percentage of each component is: Fe 20%, MnO 10%, K 2 O 10%, Al 2 o 3 60%.

[0032] This embodiment also provides a process for direct synthesis of low-carbon olefins and co-production of α-olefins from syngas, the process of which is as follows figure 1 As shown, the process includes the following steps:

[0033] H 2 The / CO volume ratio is adjusted to 2:1, and then the sulfur content of the gas is lower than 0.1ppm through deep purification, and the effective synthesis gas is obtained as the raw material gas;

[0034] Before the reaction, pass through hydrogen to activate the catalyst for 4 hours at 450°C;

[0035] After activation, the raw material gas (which can be preheated to 450°C through a heat exchanger) is passed into the synthesizer to react with the catalyst. The reaction temperature is 320°C, the pressure is 4.0MPa, and the r...

Embodiment 3

[0038] This example provides a catalyst for direct synthesis of low-carbon olefins and co-production of α-olefins from syngas, the weight percentage of each component is: Fe 20%, MnO 20%, K 2 O 5%, Al 2 o 3 55%.

[0039] This embodiment also provides a process for direct synthesis of low-carbon olefins and co-production of α-olefins from syngas, the process of which is as follows figure 1 As shown, the process includes the following steps:

[0040] H 2 The / CO volume ratio is adjusted to 2:1, and then the sulfur content of the gas is lower than 0.1ppm through deep purification to obtain effective synthesis gas as the raw material gas, and then the raw material gas is preheated to 450°C through the heat exchanger and sent to the reactor;

[0041] Before the reaction, pass through hydrogen to activate the catalyst for 4 hours at 450°C;

[0042] After activation, feed the raw material gas (which can be preheated to 450°C through a heat exchanger) into the synthesizer to reac...

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Abstract

The invention provides a catalyst and the process for directly preparing low-carbon olefin and co-production of alpha-olefin from synthetic gas. The catalyst comprises the following components in percentage by weight: 5-50% of Fe, 0.5-50% of MnO, 0.5-30% of K2O and the balance of Al2O3. The process for directly preparing low-carbon olefin and co-production of alpha-olefin from synthetic gas comprises the steps of contacting and reacting the synthetic gas containing hydrogen and carbon monoxide to prepare low-carbon olefin and jointly producing alpha-olefin. By adopting the catalyst and the process disclosed by the invention, the selectivity of methane can be well regulated and controlled, the selectivity of low-carbon olefin and alpha-olefin is increased, the utilization rationalization of synthesis gas is achieved and the economic benefits are maximized.

Description

technical field [0001] The invention relates to a catalyst and a process for directly producing low-carbon olefins and co-producing α-olefins from synthesis gas, and belongs to the technical field of comprehensive utilization of synthesis gas. Background technique [0002] Olefin is the leader of the petrochemical industry, occupies a very important position in the national economy, and is also an important symbol to measure the level of a country's economic development. Low-carbon olefins mainly refer to ethylene, propylene and butene, which are the basic organic raw materials for various chemical products such as synthetic plastics and fibers. α-Olefin refers to the C with the double bond at the end of the molecule 4 The above olefins are synthetic raw materials for polyolefin comonomers, surfactant synthesis intermediates, synthetic lubricating oils, oil additives, oil field chemicals, surfactants and other high value-added fine chemicals. [0003] At present, both low-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C07C11/02C07C1/04
Inventor 余长春刘治华李然家周红军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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