Nanjing Redsun Biochemistry Co., Ltd

Wenkui Wang

Chaoran Luo

Yi Xue

Jianhua Jiang

Xinchun Chen

Dianhai Zhou

Fujun Wang

Xiaopan Liu

Ruikuan Yue

Xiang Du

Honglong Chen

The present invention discloses a catalyst for preparing pyridine base from syngas. The catalyst includes a carrier, an active component, a first auxiliary and a second auxiliary. The carrier is molecular sieves. The active component is Rh. The first auxiliary is one or more of Mn, Fe, Na and La. The second auxiliary is one or more of Zn, Co, Cr, Bi and Cu. The active component Rh is 0.5-3% of a mass of the carrier. The first auxiliary is 0.05-5% of the mass of the carrier. The second auxiliary is 0.5-15% of the mass of the carrier. The present invention further discloses application of the catalyst to preparation of pyridine base by catalyzing syngas, where the syngas and an ammonia donor are used as reaction raw materials for reaction to generate pyridine base products. The catalyst of the present invention can couple a cyclization reaction of generating acetaldehyde through hydrogenation of carbon monoxide with a condensation reaction of aldehyde and ammonia to convert the syngas into the pyridine base through one-step catalysis, with a carbon monoxide conversion rate of 8-20% and a pyridine base selectivity of 10-18%.

Catalyst for preparing pyridine base from syngas, and preparation method and application thereof

Disclosed is a method for preparing 2,2'-dipyridine and derivatives thereof. The method includes: using pyridine represented by formula I or a derivative thereof as a raw material to generate 2,2&#x2032;-dipyridine represented by formula II by performing dehydrogenative coupling under the action of a supported catalyst in the presence of additives, where R is H, C-Calkyl, Cl, or Br. The method of the present invention features wide adaptability to raw materials, high atomic utilization rate, high catalyst activity, long service life, and fewer by-products.

Method for preparing 2,2'-dipyridine and derivatives thereof

A method for preparing 1,1'-ethylene-2,2&#x2032;-bipyridinium dichloride includes mixing an aqueous diquat dibromide solution with hydrochloric acid, adding dropwise to a mixture of an organic solvent, a bromine absorbent, and an oxidant, and reacting to produce 1,1&#x2032;-ethylene-2,2&#x2032;-bipyridinium dichloride.

Method for preparing 1,1'-ethylene-2,2&#x2032;-bipyridinium dichloride

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Nanjing, China

Wenkui Wang