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Catalyst for preparing low-carbon olefin from synthesis gas as well as preparation method and application thereof

A low-carbon olefin and catalyst technology, applied in the field of catalyst and its preparation, can solve the problem of low selectivity of low-carbon olefins

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is the low selectivity of low-carbon olefins in the prior art, and a catalyst for directly producing low-carbon olefins from synthesis gas is provided, which has the characteristics of high selectivity of low-carbon olefins

Method used

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  • Catalyst for preparing low-carbon olefin from synthesis gas as well as preparation method and application thereof
  • Catalyst for preparing low-carbon olefin from synthesis gas as well as preparation method and application thereof
  • Catalyst for preparing low-carbon olefin from synthesis gas as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Get 583.8 grams of ferric nitrate, add 1000 g of water to dissolve, obtain material I, get 12.40 grams of cerium nitrate and add 100 g of water to dissolve, obtain material II, get 25.30 grams of manganese nitrate solution that concentration is 50% (w / w), 3.46 grams of nitric acid Put copper and 1.44 g of chromium nitrate in the same container, add 100 g of water, stir and dissolve to obtain material III.

[0087] Mix materials I, II and III to obtain material IV, and use ammonia water to precipitate material IV, wash and separate the precipitate.

[0088] Add 312.5 grams of silica sol with a solid phase mass content of 40% under stirring, then add 50 g of magnesium nitrate solution (containing 0.40 gram of magnesium nitrate), adjust the pH value of the above slurry with ammonia water so that the pH of the mixed slurry=5.0 , The viscosity of the slurry is 35.

[0089] Under the condition of stirring at 70-100°C, add glycerol to adjust the viscosity of the slurry to 200...

Embodiment 2

[0095] Get 525.2 grams of ferric nitrate, add 1000 g of water to dissolve, obtain material I, get 44.70 grams of cerium nitrate and add 200 g of water to dissolve, obtain material II, get 22.80 grams of manganese nitrate solution that concentration is 50% (w / w), 3.11 grams of nitric acid Put copper and 1.30 g of chromium nitrate in the same container, add 100 g of water, stir and dissolve to obtain material III.

[0096] Mix materials I, II and III to obtain material IV, and use ammonia water to precipitate material IV, wash and separate the precipitate.

[0097] Add 312.5 grams of alumina sol with a solid phase mass content of 40% under stirring, then add magnesium nitrate solution 100g (containing 0.30 grams of magnesium nitrate), adjust the acidity of the above-mentioned slurry with ammonia so that the pH of the mixed slurry=4.0, slurry The viscosity of the material is 62.

[0098] Add glucose to adjust the viscosity of the slurry to 320 under the condition of stirring at ...

Embodiment 3

[0104] Get 605.0 grams of ferric nitrate, add 1000 g of water to dissolve, obtain material I, get 0.60 gram of cerium nitrate and add 10 g of water to dissolve, obtain material II, get 26.30 grams of manganese nitrate solution that concentration is 50% (w / w), 3.58 grams of nitric acid Put copper and 1.50 g of chromium nitrate in the same container, add 100 g of water, stir and dissolve to obtain material III.

[0105] Mix materials I, II and III to obtain material IV, and use ammonia water to precipitate material IV, wash and separate the precipitate.

[0106] Add 312.5 grams of silica sol with a solid phase mass content of 40% under stirring, then add 50 g of calcium nitrate solution (containing 0.40 gram of calcium nitrate), adjust the pH value of the above slurry with ammonia water to make the pH of the mixed slurry=5.0 , The viscosity is 36.

[0107] Under the condition of stirring at 70-100° C., add glucose to adjust the viscosity of the slurry to 191.

[0108] After fu...

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Abstract

The invention discloses a catalyst for preparing low-carbon olefin from synthesis gas as well as a preparation method and an application of the catalyst. The catalyst provided by the invention has good particle size distribution, has a good fluidized state when a reaction is carried out in a fluidized bed reactor, and is excellent in performance and relatively high in CO conversion rate and low-carbon olefin selectivity. By using the catalyst provided by the invention, a synthesis reaction for preparing olefin from synthesis gas is carried out under the conditions that the reaction temperature is 200-600 DEG C, the reaction pressure is 0.5-10MPa, the catalyst load is 100-8000mL.h<-1>. g<-1> and the raw material ratio (molar) H2 / CO is (0.1-5.0): 1, the CO conversion rate can reach 91.7%, the selectivity of low-carbon olefin in a reaction product can reach 71.3%, and better technical effects can be achieved.

Description

technical field [0001] The invention relates to the field of preparation of low-carbon olefins, and relates to a catalyst for producing low-carbon olefins from synthesis gas, a preparation method and application thereof. Background technique [0002] The iron-based catalyst commonly used for the direct production of low-carbon olefins, the co-catalyst has a great influence on the selectivity of low-carbon olefins. [0003] The introduction of Cu promoters in iron catalysts can play a role in accelerating the reduction rate of the catalyst and enhancing the activity of the catalyst, which can significantly reduce the reduction temperature of the catalyst and promote the activation of the catalyst, which may be due to the hydrogen dissociation and hydrogen overflow on the copper surface flow effect. [0004] The introduction of Cr promoter has a higher affinity to CO than Fe, and its addition to Fe-based catalysts can improve the selectivity of olefins. [0005] Additives su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/02C07C1/04C07C11/04C07C11/06B01J35/00
CPCB01J23/8892B01J23/002C07C1/044C07C2523/889B01J2523/00B01J35/40C07C11/04C07C11/06B01J2523/17B01J2523/23B01J2523/3712B01J2523/41B01J2523/67B01J2523/72B01J2523/842B01J2523/22B01J2523/3706Y02P20/52
Inventor 陶跃武庞颖聪李剑锋顾一丹姚全明陆捷
Owner CHINA PETROLEUM & CHEM CORP
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