Hydrogenation catalyst, preparation method thereof, and application method of hydrogenation catalyst in alpha, beta-unsaturated aldehydes hydrogenation preparation of saturated aldehydes

Abstract

The invention discloses a hydrogenation catalyst, a preparation method thereof, and application method of the hydrogenation catalyst in alpha, beta-unsaturated aldehydes hydrogenation preparation of saturated aldehydes. The active components of the hydrogenation catalyst comprise palladium oxide and an auxiliary agent; the auxiliary agent comprises one or a plurality of components selected from ruthenium sesquioxide, manganese oxide, rhenium heptoxide, antimony trioxide, bismuth trioxide and selenium dioxide. The hydrogenation catalyst is suitable to be used for alpha, beta-unsaturated aldehydes selective hydrogenation preparation of saturated aldehydes, and is especially suitable for isooctene aldehyde selective hydrogenation preparation of isooctyl aldehydes. Target products can be prepared at high conversion rate and high selectivity; and great meaning in industrial hydrogenation oxidation process preparation of isocaprylic acid is achieved.

Description

technical field [0001] The invention relates to the field of fine chemicals, in particular to a catalyst for hydrogenating α,β-unsaturated aldehydes to prepare saturated aldehydes, in particular to a catalyst for preparing isonew aldehydes by hydrogenating isooctenal, a preparation method and a hydrogenation reaction method. Background technique [0002] Isooctanoic acid and its salts are important fine chemicals, mainly used as accelerators and catalysts for various unsaturated polyester resins, drier for coatings and inks, processing aids for polyvinyl chloride, metal processing and lubrication aids, oil Product additives, rubber vulcanization accelerators, and as intermediates to synthesize medicines, dyes, pesticides and spices, etc. There are nearly ten isooctanoic acid production enterprises in my country, with an annual production capacity of about 15,000 tons / year, among which Shenyang Zhangming Chemical Co., Ltd. is the largest manufacturer in China, with an annual ...

AI Technical Summary

Problems solved by technology

The main difficulty in the selective hydrogenation of isooctenal is that first, the hydrogenation activity of the carbon-carbon double bond and the aldehyde group is very close, and there is a high requirement for the activity of the catalyst. If the activity is too high, it will lead to complete hydrogenation. Octanol; too low activity will lead to low conversion rate of raw materials, because the stability of isooctenal is relatively poor, and finally the yield is low; Cross side reactions can occur with each other. The side reactions are mainly high wastes formed by condensation and polymerization. These high wastes exist in the form of tar and will adhere to the surface of the catalyst, thereby affecting the performance of the catalyst. Therefore, the preparation can effectively inhibit the side reactions. Catalysts that occur are particularly important

Images