Product performance and process flow of m-nitrobenzaldehyde

Nitrobenzaldehyde (m-nitrobenzaldehyde) also known as 3-nitrobenzaldehyde (3-nitrobenzaldehyde), of the formula C _.
7 H _.
5 NO _.
3 , a molecular weight of 151.
12, the formula

1.

Light yellow needle-like crystal or crystalline powder; melting point 58-59°C, boiling point 164°C (3.
07kPa), relative density (d ₄ ²⁰ ) 1.
2792; soluble in ethanol , ether , chloroform, benzene and acetone , almost insoluble in water, Can volatilize with water vapor
.

2.
Production principle

Benzaldehyde reacts with mixed acid to produce m-nitrobenzaldehyde
.

3.

4.

5.

Nitrification reactor, crystallization pot, filter, vacuum drying box, storage tank
.

6.
Production process

1) Sodium nitrate method

In the dry nitration reactor, put 1550kg of 98% sulfuric acid from the high tank , add 153.
5kg of sodium nitrate under stirring , heat up to 70～80℃, keep for 0.
5h, so that the sodium nitrate is completely dissolved
.

2) Nitric acid method

In the enamel nitrification reactor, first add 1130kg of concentrated sulfuric acid, stir, add 78.
5kg of nitric acid below 20℃, add 87kg of benzaldehyde below 5℃, keep it at 5～10℃ for 1h, until there is no benzaldehyde odor in the tank So far
.

7.
Product Standard

8.

Used as an intermediate in the organic synthesis of dyes, surfactants, and pharmaceuticals
.

9.
Safety measures

(1) The raw material benzaldehyde has low toxicity and is a dangerous product, with an explosion range (lower limit) of 1.
4%
.

(2) This product is toxic and irritating
.
Store in a cool and ventilated place, sealed and protected from light
.