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The chemical properties of benzaldehyde are similar to those of fatty aldehydes, but they are also different. The benzaldehyde cannot reduce the Ferin reagent; when the benzaldehyde is reduced by the reagent used in the reduction of the fatty aldehyde, in addition to the main product benzyl alcohol, some tetrasubstituted o-diol compounds and homodiphenylethylene glycol are produced. In the presence of potassium cyanide, two molecules of benzaldehyde form benzoin by imparting hydrogen atoms. Benzaldehyde can also undergo electrophilic substitution reaction on the aromatic nucleus, mainly producing meta-substituted products. For example, the main product in the nitration is m-nitrobenzaldehyde. [2] It is easily oxidized in the air to form white benzoic acid. It can react with amides to produce pharmaceutical intermediates.

1. Dissolve benzaldehyde in a certain amount of ether and then wash with Na2CO3 solution. The washed organic solution was dried over anhydrous Na.sub.2SO.sub.sub.sub.sub. The benzaldehyde treated as above was added to a small amount of zinc powder and distilled under reduced pressure.

2. Wash with sodium hydroxide or 10% sodium carbonate first, then wash with aqueous sodium sulfite solution. Drying with magnesium sulfate or sodium chloride: Finally, disulfide nitrogen was added to protect the vacuum distillation.

Store in a cool, ventilated warehouse. Keep away from fire and heat. The package is sealed and must not be in contact with air. It should be stored separately from oxidants, acids and food chemicals, and should not be mixed. Explosion-proof lighting and ventilation facilities are used. It is forbidden to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with leakage emergency treatment equipment and suitable containment materials.