Catalyst for producing furan by furfural liquid-phase decarbonylation and preparation method

Abstract

The invention provides a catalyst for producing furan by furfural liquid-phase decarbonylation and a preparation method. In the catalyst, expression gamma-Al2O3 and MO are taken as a composite carrier and the promoter MO is oxides of K, Cs or Li. MO accounts for 0.5-2.0wt% of the composite carrier. The active component of the catalyst is Pd and the parent of Pd is PdCl2 (or Pd(NO3)2 or [Pd(C2H3O2)2]3. Pd accounts for 5wt% of the composite carrier. The catalyst is prepared by means of dipping precipitation and has good activity in furfural liquid-phase decarbonylation reaction with furfural percent conversion of 92.5-98.2%, furan selectivity of 85.3-94.2% and has long service life of 100-120h.

Description

technical field [0001] The invention relates to a catalyst for producing furan by liquid-phase decarbonylation of furfural and a preparation method thereof. Background technique [0002] Furfural is an important organic chemical raw material. The annual output of furfural in my country reaches more than 100,000 tons, but most of them are exported as cheap chemical raw materials. In order to improve the economic benefits of furfural production enterprises, it is necessary to vigorously develop high-value derivatives of furfural. Furan is an important pharmaceutical and pesticide organic intermediate, widely used in many important organic synthesis and drug production, it can also be used to prepare pyrrole, thiophene, tetrahydrofuran (THF) and so on. Tetrahydrofuran (THF) is an important solvent and can also be used to manufacture polyurethane fibers and polyurethane elastomers. Therefore, the development of furan and tetrahydrofuran (THF) process by decarbonylation of furfu...

AI Technical Summary

Problems solved by technology

There are many catalyst systems for producing furan. The earlier ones include soda lime, PbO and HgO and other oxidative decarbonylation catalysts, but they have been eliminated due to problems such as low activity and catalyst toxicity.

Oxidative decarbonylation catalysts in the 1960s and 1970s included Zn-Cr, Zn-Fe-Mn, Zn-Cr-Fe, Zn-Cd-Mn-Al and other metal oxide catalysts, but due to poor stability, catalyst life Short, small production capacity, harsh reaction conditions and gradually abandoned

However, China's domestic furan, tetrahydrofuran and other furfural deep-processing products are in short supply, which has resulted in a situation where furfural is exported at low prices, but tetrahydrofuran and other products are imported at high prices.

Images