PREPARATION METHOD FOR 4,4'-BIPYRIDINE - NANJING REDSUN BIOCHEMISTRY CO LTD

Title:

PREPARATION METHOD FOR 4,4'-BIPYRIDINE

Document Type and Number:

WIPO Patent Application WO/2023/226169

Kind Code:

A1

Abstract:

A preparation method for 4,4'-bipyridine, comprising: using pyridine as a raw material, preheating and gasifying the pyridine, then, catalyzed by a loaded Ni/HY catalyst, generating 4,4'-bipyridine via a dehydrogenation coupling reaction; the nickel loading of the loaded Ni/HY catalyst is 5%-30%, and the carrier of the loaded Ni/HY catalyst is an HY molecular sieve. Cheap pyridine is used as the raw material, and production costs are low; the loaded Ni/HY catalyst is used to obtain 4,4'-bipyridine via a one-step catalytic coupling dehydrogenation reaction, the target product selectivity is high, and the reaction process is simple and easy to operate; moreover, the amount of "three wastes" generated is low, which is environmentally friendly, and suitable for continuous, industrial production of 4,4'-bipyridine.

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Inventors:

CHEN HONGLONG (CN)
DING YONGSHAN (CN)
YUE RUIKUAN (CN)
LUO CHAORAN (CN)
WANG WENKUI (CN)

Application Number:

PCT/CN2022/104436

Publication Date:

November 30, 2023

Filing Date:

July 07, 2022

Export Citation:

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Assignee:

NANJING REDSUN BIOCHEMISTRY CO LTD (CN)

International Classes:

C07D213/22; B01J29/14

Foreign References:

CN108349892A	2018-07-31
CN1158852A	1997-09-10
CN114134522A	2022-03-04
CN106800530A	2017-06-06

Other References:

房克功等 (ANG, KEGONG ET AL.): "Ni/AlMCM-41，Ni/HY，Ni/HZSM-5催化剂在正十二烷加氢转化反应中的催化性能比较 (Non-official translation: Comparison of Catalytic Performances of Ni/AlMCM-41, Ni/HY and Ni/HZSM-5 Catalysts in N-dodecane Hydro-conversion Reaction)", 石油化工 (PETROCHEMICAL TECHNOLOGY), vol. 34, 31 December 2005 (2005-12-31)
GANG JI, WEN LANGYOU; GAO LIANG; XIA YUETONG; DONG MINGHUI: "Benzene Hydroalkylation to Cyclohexylbenzene by Ni/HY Catalyst Over Fixed Bed Reactor at Low Temperature", ACTA PETROLEI SINICA(PETROLEUM PROCESSING SECTION), vol. 35, no. 6, 25 November 2019 (2019-11-25), pages 1067 - 1076, XP093112085

Attorney, Agent or Firm:

NANJING TIANHUA PATENT AGENT CO., LTD. (CN)

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