Catalyst for butene oxidative dehydrogenation preparation of butadiene and preparation method thereof

A technology for oxidative dehydrogenation and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, carbon compound catalysts, physical/chemical process catalysts, etc., can solve the problem of low selectivity of butadiene and deep oxidation products CO2 and other problems, to achieve good performance, reduce the production of CO2, high conversion rate of butene

Active Publication Date: 2017-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing catalysts for the oxidative dehydrogenation of butene to butadiene have low selectivity to butadiene and produce deep oxidation product CO 2 More problems, to provide a new catalyst for the oxidative dehydrogenation of butene to butadiene, the catalyst preparation method is simple, in the butene oxidative dehydrogenation reaction to reduce the deep oxidation product CO 2 and CO production, with the advantages of high butadiene selectivity, less by-products, especially deep oxides, and high stability of catalyst performance

Method used

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  • Catalyst for butene oxidative dehydrogenation preparation of butadiene and preparation method thereof
  • Catalyst for butene oxidative dehydrogenation preparation of butadiene and preparation method thereof
  • Catalyst for butene oxidative dehydrogenation preparation of butadiene and preparation method thereof

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Embodiment 1

[0024] Weigh an appropriate amount of high-purity ferric nitrate and magnesium nitrate and mix them in 1L of deionized water, and stir evenly. Then the above solution is co-precipitated with 20% ammonia solution, the precipitation pH value is kept at 9.5, and the precipitation temperature is room temperature, then the solid sample in the precipitated product is separated with a centrifuge, washed with 4L deionized water, and the obtained solid Dry in an oven at 110°C for 4 hours. The dried sample was calcined in a muffle furnace at 600°C for 4 hours to obtain catalyst A, which was ground into 40-60 mesh particles for catalyst evaluation. The Fe-containing component of catalyst A consists of Fe 2 o 3 2MgFe 2 o 4 , the catalyst also contains Li 70ppm, Ca 200ppm, and Ti 150ppm in mass fraction.

Embodiment 2

[0026] Weigh an appropriate amount of high-purity ferric nitrate and magnesium nitrate and mix them in 1L of deionized water, and stir evenly. Then the above solution is co-precipitated with 10% ammonia solution, the precipitation pH value is maintained at 6.0, and the precipitation temperature is 10°C, then the solid sample in the precipitated product is separated with a centrifuge, washed with 4L deionized water, and the resulting The solid was dried in an oven at 90°C for 24 hours. The dried sample was calcined in a muffle furnace at 400°C for 24 hours to obtain catalyst B, which was ground into 40-60 mesh particles for catalyst evaluation. The Fe-containing component of catalyst B consists of Fe 2 o 3 20MgFe 2 o 4 , the catalyst also contains Li 95ppm, Ca 260ppm, and Ti 180ppm in mass fraction.

Embodiment 3

[0028] Weigh an appropriate amount of high-purity ferric nitrate and magnesium nitrate into 1L of deionized water, and stir evenly. Then the above solution is co-precipitated with 30% ammonia solution, the precipitation pH value is maintained at 12, and the precipitation temperature is 80 ° C. Then, the solid sample in the precipitated product is separated with a centrifuge, washed with 4L deionized water, and the resulting The solid was dried in an oven at 150°C for 1 hour. The dried sample was calcined in a muffle furnace at 650°C for 1 hour to obtain catalyst C, which was ground into 40-60 mesh particles for catalyst evaluation. The composition of the Fe-containing component of catalyst C is 20Fe 2 o 3 1MgFe 2 o 4 , the catalyst also contains Li 50ppm, Ca 190ppm, and Ti 140ppm in mass fraction.

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Abstract

The invention relates to a catalyst for butene oxidative dehydrogenation preparation of butadiene and a preparation method thereof. The catalyst mainly solves the problem that the existing catalyst for butene oxidative dehydrogenation preparation of butadiene has low selectivity to butadiene and produces more deep oxidative products. The catalyst component comprises Fe<3+> and Sb elements, Fe<3+> exists in at least one form of Fe2O3 and Fe2O4<2->, Li mass content of the catalyst is less than 900ppm, Ca mass content of the catalyst is less than 900ppm and Ti mass content of the catalyst is less than 900ppm. The catalyst solves the problem, realizes efficient and stable preparation of a butadiene product, reduces deep oxidative product CO2 and can be used for industrial production of butadiene through butene oxidative dehydrogenation.

Description

technical field [0001] The invention relates to a catalyst and a process for preparing butadiene by oxidative dehydrogenation of butene. Background technique [0002] 1,3-Butadiene is an important monomer for synthetic rubber and resin, and plays an important role in petrochemical olefin raw materials. In recent years, with the rapid development of the synthetic rubber and resin industry and the increasing use of butadiene, the market demand for butadiene continues to grow, and the raw materials of butadiene are in short supply. At present, butadiene is mainly obtained through the extraction of naphtha cracking products, which is far from meeting the market demand, and the development of coal chemical industry and large-scale shale gas in the emerging energy field cannot provide butadiene products, so people begin to pay attention to other Butadiene production methods, among which the research on butene oxidative dehydrogenation technology is relatively extensive. The C4 f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/80C07C5/48C07C11/167
CPCB01J23/002B01J23/745B01J23/80B01J2523/00C07C5/48C07C2523/745C07C2523/80B01J2523/842B01J2523/22B01J2523/27B01J2523/847C07C11/167
Inventor 曾铁强缪长喜吴文海樊志贵姜冬宇
Owner CHINA PETROLEUM & CHEM CORP
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