Production process and product standards of ammonium anthraquinone-2-sulfonate

The molecular formula of anthraquinone-2-sulfonic acid ammonium salt is C ₁₄ H ₁₁ NO ₅ S, the molecular weight is 305.
34, and the structural formula is

1.
Product performance

White solid, soluble in water
.

2.
Production principle

The anthraquinone-2-sulfonic acid is obtained by the action of o-benzoylbenzoic acid and fuming sulfuric acid through ring closure and sulfonation, and then neutralized with ammonia water to obtain ammonium anthraquinone-2-sulfonate
.

3.
Process flow

4.
Technical formula (quality, portion)

5.
Main equipment

Closed loop sulfonation reactor, dilution tank, filter, neutralization tank, storage tank, blow dryer
.

6.
Production process

In the closed loop sulfonation reactor, add 400kg 20% ​​oleum and 230kg 65% oleum (the concentration of the mixed oleum is 36.
5%)
.

7.
Laboratory preparation method

Add 100g of refined anthraquinone to 125g of fuming sulfuric acid containing 18% SO ₃ under stirring , and gradually heat to 135°C.
The stirring will gradually slow down, and the reaction will be kept warm for 3 hours
.

8.

9.

Used as a dye intermediate, and also used to prepare 2-aminoanthraquinone

10.

(1) When using o-formylbenzoic acid, anthraquinone, fuming sulfuric acid and other toxic or corrosive raw materials in production, the equipment should be sealed, and the operators should wear labor protection equipment

(2) Sealed package and stored in a cool and dry place

Related links: Product performance and production principle of anthraquinone-1-ammonium sulfonate