Method for salicylic acid electrolysis for preparing salicyic aldehyde

A technology of salicylic acid and salicylaldehyde, applied in the electrolysis process, electrolysis components, electrolysis organic production and other directions, can solve the problems of low product purity, complex catholyte composition, low current efficiency and conversion rate of electrolytic reduction method, etc.
CN101008086AInactive Publication Date: 2007-08-01EAST CHINA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Publication Date
2007-08-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a direct electro-reduction method for preparing ortho-hydroxybenzaldehyde with 2-hydroxybenzoic acid in H type electrolyser, which is characterized in that quaternary ammonium salt addictive is added in cat electrode room. It takes lead plate as cathode and anode, takes ortho-hydroxybenzaldehyde and hydric sulphate as electrolytic solution for cathode and anode, the current efficiency reach over 35% at 10- 40 Deg. C and current density of 500- 2000 A / m2, which is 10% more than that without addictive.
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Description

technical field

[0001] The invention relates to a preparation method of salicylaldehyde, in particular to a method for preparing salicylaldehyde by electrolytic reduction of salicylic acid. Background technique

[0002] Salicylaldehyde (Salicylic aldehyde), the scientific name is o-hydroxybenzaldehyde, the molecular formula is C 7 h 6 o 2 , is a fine chemical product with a wide range of uses, and is widely used in the production of pesticides, medicines, and integrants. It is an important raw material in the production of synthetic perfume industry, it can be used as an antioxidant in the plastic resin industry, and it is also a raw material in petrochemical and other industries. At present, the production of salicylaldehyde mainly includes catalytic oxidation and electrolytic reduction. Among them, the catalytic oxidation method is to use salicyl alcohol as raw material to prepare salicylaldehyde through catalytic oxidation, such as CN1045095 and BG25435; the report on...

Claims

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