Process for treating dregs, treated dregs, use thereof, process for vulcanizing rubber, and vulcanized rubber

The rubber vulcanization process according to claim 1, wherein the rubber is natural rubber, styrene butadiene rubber (SBR), ethylene-propylene dimer rubber (EPDM), polybutadiene rubber (BR), or nitrile rubber (NBR).

The rubber vulcanization process according to claim 1, wherein 1 to 5 parts of the treated dregs are added per 100 parts of the rubber to be vulcanized.

Means for carrying out the rubber vulcanization process defined in claim 1, wherein the means comprise

• (i) providing one between a dryer tunnel, a rotary drum dryer or a fluid bed dryer, wherein the one between a dryer tunnel, a rotary drum dryer or a fluid bed dryer is configured to enable the drying of the dregs generated in the clarification of green liquor in the kraft process of obtaining cellulose;
• and
• (ii) providing one between a hammer mill, a ball mill, a rod mill, an air jet mill, a pendular mill, or a long gap mill, wherein the one between a hammer mill, a ball mill, a rod mill, an air jet mill, a pendular mill, or a long gap mill is configured to enable a micronization of the dregs generated in the clarification of green liquor in the kraft process of obtaining cellulose, dried in step (i), until reaching an average particle size (d50) from 2 to 45 micrometers, preferably, 10 to 15 micrometers, and more preferably, 10 micrometers.

Means for carrying out the rubber vulcanization process, according to claim 5, wherein the drying capacity is from 60 to 6,000 kg H2O/hour.

Means for carrying out the rubber vulcanization process, according to claim 5, wherein the operating power of the drying is from 11 to 700 kW.

Means for carrying out the rubber vulcanization process, according to claim 5, wherein the drier speed is 20 to 6,000 rpm for integrated dryers and from 10 to 500 rpm for drum dryers.

Means for carrying out the rubber vulcanization process, according to claim 5, wherein the air flow of the dryer is from 500 to 15,000 Nm3/hour.

Means for carrying out the rubber vulcanization process, according to claim 5, wherein he micronization capacity is 1,000 to 15,000 kg/hour.

Means for carrying out the rubber vulcanization process, according to claim 5, wherein the power consumption of the mill is from 100 to 1500 kWh.