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Salicylaldehyde
[Alias] o-hydroxybenzaldehyde
[Structural formula]
[Physical and chemical properties] Colorless or dark red oily liquid
[Preparation method] There are many methods for synthesizing salicylaldehyde.
(1) Reimer Tiemann method using phenol as raw material
The Reimer-Tiemann reaction was invented by K.
The traditional ReimerTiemann method is carried out in a heterogeneous system.
(2) Synthesis method using o-cresol as raw material
The preparation of salicylaldehyde with o-cresol as a raw material mostly adopts the method of hydrolyzing the side chain after chlorination to obtain the product
(3) Electrochemical method using salicylic acid as raw material
The electrolytic reduction of salicylic acid can produce salicylaldehyde, and the carboxyl group can be selectively reduced cathodely to obtain the aldehyde group by controlling the reaction conditions
(4) Synthesis method using salicyl alcohol as raw material
There are two main methods for preparing salicylaldehyde from salicyl alcohol as a raw material: salicyl alcohol liquid phase catalytic oxidation method and electro-oxidation method
Xie Weiyue used the developed non-precious metal catalyst HLO-509 to carry out the liquid phase catalytic oxidation of salicyl alcohol to salicylaldehyde and made progress.
[Technical Index]
[Application] Salicylaldehyde is mainly used in water treatment, pharmaceutical industry, food fragrance and essence, pesticides, electroplating and other fields to manufacture chemical intermediates for various products
(1) Pharmaceutical industry
Salicylaldehyde is widely used as a pharmaceutical intermediate in the pharmaceutical industry
(2) Food spices and flavors
Salicylaldehyde is used as a raw material for the synthesis of coumarin and is widely used in the soap and flavor industries
(3) Pesticide intermediates, fungicides
Salicylaldehyde is a valuable intermediate in the production of herbicides and pesticides
Related Links: Application of Acrolein
