Product performance and production principle of p-nitrophenol

Nitrophenol (p-nitrophenol), also known as 4-nitrophenol, molecular formula C _.
6 H _.
5 NO _.
3 , a molecular weight of 139.
11, the formula

1.

Colorless to pale yellow crystal; melting point 113～114℃; boiling point 279℃ (decomposition); relative density 1.
270; soluble in organic solvents such as ethanol , ether and chloroform , soluble in water, sodium carbonate and sodium hydroxide solution; Oxidized in the air, the color gradually darkens; poisonous
.

2.
Production principle

It is obtained by alkaline hydrolysis of p-nitrochlorobenzene and then acidification
.

3.

4.

5.

Hydrolysis pot, crystallization pot, suction filter, storage tank
.

6.
Production process

Add 2320-2370L of 137-140g/L sodium hydroxide solution into the hydrolysis pot, and then add 600kg of molten p-nitrochlorobenzene
.

7.
Laboratory preparation method

Add 62.
8g of p-nitrochlorobenzene and 600mL of water into a 1.
5L stainless steel autoclave, and add 86.
5g of 35% sodium hydroxide solution under stirring
.

Then, the filter cake was dissolved in 500 mL of hot water and boiled until the smell of p-nitrochlorobenzene disappeared
.

Related links: Production process and product standards of p-aminophenol