Do You Know How To Digest Para-aramid Spinning Waste?

1. a method for dissolving para-aramid fiber spinning waste, is characterized in that comprising the steps:

A uses a crusher to crush the para-aramid spinning waste;

B transfers the crushed para-aramid spinning waste to the digestion kettle;

C Inject phosphoric acid, sulfuric acid or a mixture of the two in the acid storage tank into the digestion kettle, under the condition of 100°C to 300°C and stirring~

Keep 50 hours 200 hours;

D The digestate in the digestion tank is introduced into the neutralization tank through the gear pump, and at the same time, the pH of the neutralization tank is adjusted to 68 with aqueous hydroxide solution;

E. Filter the neutralized suspension through a plate and frame filter press to separate the washing water and filter residue.

2. A method for digesting para-aramid spinning waste according to claim 1, characterized in that in step (A), the crusher is a horizontal centrifugal crusher.

3. A method for digesting para-aramid spinning waste according to claim 1, characterized in that: in step (D), the selected hydroxide is sodium hydroxide, calcium hydroxide or both mixture.