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Catalyst for ammoxidation of propylene, method for preparing same, and method for ammoxidation of propylene by using same

A catalyst, ammonia oxidation technology, applied in catalyst activation/preparation, hydrocarbon ammoxidation preparation, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of insufficient research on structure and performance, limited conversion rate selectivity, etc. , to achieve the effect of high catalytic efficiency and reactivity, high selectivity and yield

Pending Publication Date: 2021-07-23
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, despite a wide variety of catalyst compositions, the significant improvement in the conversion of reactants (i.e., propylene) and the selectivity of reaction products (i.e., acrylonitrile) in the ammoxidation of propylene has been hampered by insufficient studies on the structure and performance. limit

Method used

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  • Catalyst for ammoxidation of propylene, method for preparing same, and method for ammoxidation of propylene by using same
  • Catalyst for ammoxidation of propylene, method for preparing same, and method for ammoxidation of propylene by using same
  • Catalyst for ammoxidation of propylene, method for preparing same, and method for ammoxidation of propylene by using same

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preparation example Construction

[0079] Preparation method of ammoxidation catalyst for propylene

[0080] According to another embodiment of the present invention, there is provided a method for preparing the catalyst of the above-mentioned one embodiment using an impregnation method.

[0081] As briefly stated above, the catalyst of one embodiment can be prepared by loading a metal precursor solution on a silica support using a process of impregnation, drying, and then calcination.

[0082] More specifically, the preparation method of the catalyst of an embodiment comprises the following steps:

[0083] preparing a first precursor solution, the first precursor solution comprising a Mo precursor;

[0084] preparing a second precursor solution, the second precursor solution comprising Bi precursor, Fe precursor, A precursor (A = one or more elements in Ni, Mn, Co, Zn, Mg, Ca and Ba) and B precursors (B = one or more elements in Li, Na, K, Rb and Cs);

[0085] mixing the first precursor solution and the sec...

Embodiment 1

[0129] (1) Preparation process of precursor solution

[0130] In distilled water at 60 °C, 10.592 g of Mo precursor ((NH 4 ) 6 Mo 7 o 24 ) and 3.18 g of citric acid, and mixed to prepare a Mo precursor solution.

[0131] Separately, in distilled water at room temperature, 1.819 g of Bi precursor (Fe(NO 3 ) 3 ·5H 2 O), 9.488g Co precursor (Co(NO 3 ) 2 ·6H 2 O), 2.990g Fe precursor (Fe(NO 3 ) 2 9H 2 O) and 0.354g K precursor (KNO 3 ), and add 2.16g nitric acid (HNO 3 ), and then, they were mixed to prepare a mixed solution of Bi, Fe, Co and K precursors.

[0132] The Mo precursor solution; and the mixed solution of Bi, Fe, Co and K precursors are mixed to form a mixed solution of Mo, Bi, Fe, Co and K precursors.

[0133] In the mixed solution of the precursor, the total amount of distilled water was 54.07 g.

[0134] (2) Process of loading precursor solution in silica carrier (using impregnation method)

[0135] The D50 particle size is 55μm, the inner pore size...

Embodiment 2 to Embodiment 7

[0147] (1) Preparation process of catalyst (using impregnation method)

[0148] Each catalyst of Example 2 to Example 7 was prepared by the same method as Example 1, except that a precursor solution was prepared according to the composition described in Table 1 below, and a silica carrier described in Table 2 below was used.

[0149] (2) Ammoxidation process of propylene

[0150] The ammoxidation process of propylene was carried out using each catalyst of Examples 2 to 7 instead of Example 1, and then, the product was recovered and analyzed by the same method as Example 1.

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Abstract

The present invention relates to a catalyst for ammoxidation of propylene, a method for preparing same, and a method for ammoxidation of propylene by using same. Specifically, in an embodiment of the present invention, a catalyst is realized to have a structure in which a metal oxide is loaded on a silica carrier, whereby the catalyst can provide a high reactive surface area by taking advantage of meso pores useful for gas absorption-desorption and ultimately increases the ammoxidation reaction of propylene.

Description

technical field [0001] [Cross Reference to Related Application] [0002] This application claims Korean Patent Application No. 10-2019-0121172 filed with the Korean Intellectual Property Office on September 30, 2019, Korean Patent Application No. 10-2019 filed with the Korean Intellectual Property Office on October 25, 2019 - 0134088, and the benefit of Korean Patent Application No. 10-2020-0123875 filed with the Korean Intellectual Property Office on September 24, 2020, the disclosures of which are incorporated herein by reference in their entirety. [0003] The present invention relates to an ammoxidation catalyst for propylene, a preparation method of the catalyst and an ammoxidation method using the catalyst. Background technique [0004] The ammoxidation process of propylene is based on the reduction and reoxidation mechanism of the reaction between ammonia and propylene. In order to improve the conversion rate of the reactant (ie propylene) and the selectivity and yie...

Claims

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Application Information

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IPC IPC(8): B01J23/882B01J35/10C07C253/24C07C255/08
CPCB01J23/882C07C253/24B01J35/61B01J35/63B01J35/64C07C255/08B01J23/8876B01J2523/00C07C253/26Y02P20/52B01J35/40B01J35/617B01J35/613B01J35/615B01J35/638B01J35/651B01J35/635B01J35/633B01J35/647B01J2523/13B01J2523/54B01J2523/68B01J2523/842B01J2523/845B01J21/08B01J23/002B01J37/0209B01J37/04B01J37/08
Inventor 姜京延金志娟崔埈瑄
Owner LG CHEM LTD
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