Catalyst used in process of preparing furfuryl alcohol by furfural through selective hydrogenation and preparation method of catalyst

Abstract

The invention discloses and provides a catalyst used in a process of preparing furfuryl alcohol by furfural through selective hydrogenation and a preparation method of the catalyst, wherein the catalyst has the advantages of lower cost, capability of protecting environment, low reaction temperature, long service life and high activity and selectivity. The catalyst is a copper oxide-silicon oxide compound oxide. The preparation method comprises the steps of: 1, adding water in a copper salt, stirring for dissolving, and reacting by using 10-20 weight percent of sodium hydroxide solution to form a colloid A; 2, diluting the silicon oxide colloid by using water accounting for two times of the silicon oxide colloid by weight to form a colloid B; 3, adding the colloid B into the colloid A, mixing, sequentially heating, ageing, filtering, washing, drying and roasting; and 4, carrying out hydrogenation reduction activation for 3-18h to prepare the catalyst. The catalyst does not contain a toxic material Cr, can react at a low temperature, is capable of reducing the production energy consumption, and is high in reaction activity, high in furfural transformation rate, and high in selectivity of furfuryl alcohol.

Description

technical field [0001] The invention relates to a catalyst for preparing furfuryl alcohol through selective hydrogenation of furfural and a preparation method thereof. Background technique [0002] Furfuryl alcohol, chemical name furan methanol, 2-hydroxymethyl furan, is an important organic raw material. Furfuryl alcohol is mainly used in the production of furfural resin, furan resin, modified urine aldehyde and phenolic resin, etc. It is also a good solvent for resins, varnishes, and pigments. It can also be used for molding and core making in casting production. It is used in synthetic fibers, rubber, and pesticides. Also has a wide range of uses. The resin after furfuryl alcohol polymerization has high strength, good heat resistance and water resistance, and has good resistance to acids, alkalis, salts and organic solutions. It is an excellent binder for porous materials such as wood, rubber, metal and ceramics. Furfuryl alcohol is the most important species of fur...

AI Technical Summary

Problems solved by technology

The current hydrogenation catalysts mainly include Cu-Cr, modified Cu-Cr and Raney Ni, etc. Cr-containing catalysts are not only very expensive, but also have high toxicity because the copper-chromium oxide catalyst used is discharged from the reactor with the hydrogenation product , causing serious pollution to the environment, or separation and regeneration are difficult, and it is easy to block the reactor. Although the Raney Ni catalyst has high activity, it is easy to produce by-products, and the catalyst preparation process involves alkali extraction of aluminum, which will also cause certain environmental pollution. Pollution

Some existing documents, such as the catalysts reported in patent numbers ZL 200510122916.5 and 201210090013.3, can solve some problems, but there is still a certain amount of Cr, which does not completely eliminate the impact of Cr on the environment

The document ZL200510011872.9 also reported a catalyst that does not contain Cr, but it not only has a copper oxide content higher than 45%, but also contains TiO 2 It will inevitably cause the cost of catalyst raw materials to be too high. At the same time, TiO 2 The purity has a great influence on the activity of the catalyst, for TiO 2 Refined and SiO 2 The mixing process requires high requirements, which makes the catalyst preparation process complicated