De-inking Agent



De-inking agent for waste paper – KG-Q280 is a new product researched by our R&D department, which can totally instead fatty acid soap de-inking agent. The advantage of KG-Q280 is low dosage, it can save about 40%-50% of fatty acid soap de-inking agent by using it. And save cost about 15%-25%. Besides, we are the only manufacturer who can produce it in China. KG-Q280 can be used on waste paper recycle.


  • Appearance: Milky white liquid
  • Main components: Fatty acid derivative, Highly efficient dispersing emulsifier, Special surfactant
  • Gravity(20oC, g/cm3): 0.93 – 1.1
  • PH(1% Aqueous solution): 5.5 – 7.0

De-inking Agent:


  1. Widely adapted to most production line of waste paper de-inking process.
  2. The advantage of KG-Q280 is low dosage, it can save about 40%-50% of fatty acid soap de-inking agent by using it.
  3. Increase about 1%ISO whiteness and 10% pulp output than fatty acid soap deinking agent.
  4. Because of the low dosage of KG-Q280, it can decrease at least 50% COA of waste water. Better for environment protection.
  5. Can replace fatty acid soap deinking agent directly.


200kgs or 1000kgs drum. We can meet our customers’ different package requirements.




Subjects: Deinking agent-1(Kemira), Deinking agent-2(Fatty Acid), KG-280, KG-DA200.

The test result include whiteness, whiteness increase and foaming of the waste paper after pulping and after flotation.


Experimental process and conditions

  1. Experimental chemicals

Currently uses deinking agent-1, deinking agent-2

Younger provided emulsion deinking agent KG-280, and KG-DA200

Industrial Na2SiO3, NaOH


  1. Experimental waste paper ratio

Paper factory use waste paper


  1. Test equipment

N-100T 12 elevated thick pulper (USA), flotation tank Delta 25TM (Germany), CTP-ISO ERIC 950 residual ink particle detector (Canada), vacuum pump.


  1. Experimental process parameters
    • Pulp chemical usage

The amount of pulping chemicals is shown in the table below.

Dosage Deinking agent-1 (%) KG280 (%) KGDA200 (%) NaOH (%) Na2SiO3 (%)
Experiment 1
Deinking agent-1
0.05 / / 0.25 1
Experiment 2
Deinking agent-1
0.4 / / 0.25 1
Experiment 3
/ 0.1 / 0.25 1
Experiment 4
/ 0.2 / 0.25 1
Experiment 5
/ / 0.05 0.25 1
  • Pulping condition

Pulp concentration 15%, temperature 50 ° C, time 15 min, speed 300 rpm

  • Flotation

Experiment 1, when flotation, add deinking agent 2, the added dosage is 0.05% (ton of pulp)

Experiment 2, when flotation, add deinking agent 2, the added dosage is 0.40% (ton of pulp)

Experiment 3, no flotation agent was added during flotation

Experiment 4, no flotation agent was added during flotation

Experiment 5, when flotation, add deinking agent KG-DA200, the added dosage is 0.03% (ton of pulp)

The conditions for flotation were: concentration 1%, air flow 4.7 l/min, time 8 min, temperature 45 °C.


  1. Experimental results and analysis

Pulp whiteness (-UV) and residual ink data comparison

Deinking Agent Pulp whiteness(%) Flotation accepts whiteness (%) Pulp ERIC (ppm) Flotation accepts ERIC (ppm) Ink removal rate (%) whiteness increase (%)
Experiment 1 59.82 67.73 872.3 313.87 83.86 7.91
Experiment 2 60.22 68.32 899.87 330.48 80.16 8.1
Experiment 3 59.32 68.65 842.47 300.53 88.58 9.33
Experiment 4 59.55 69.35 853.21 290.28 92.28 9.8
Experiment 5 59.85 68.61 865.42 308.28 85.26 8.76

From the data in the table and the phenomena observed during the experiment:

    1. Experiment foam situation: Experiment 1 has more foam and more loss. Experiment 2 hasmore foam and much more loss. In Experiment 3 and 4, after KG-280 foaming, the bubble became larger, and it burst when increased to 20 mm. The surface of foam layer was stable, very close to the soap, and the foam was moderate in. The surface is black and the flotation effect is extremely good. The experiment 5 foam is closer to Experiment 1.
    2. Comparing Experiment 1 with Experiment 2, with the increase of the dosageof Deinking Agent 1 and Deinking Agent 2, the terminal whiteness increased by about 0.5 degrees, but the foam was much more and the loss was much larger. The experiment 3 terminal whiteness  compared with Experiment 1 and experiment 2, which has increased 0.9 degrees and3 degrees respectively. The ink removal rate increased by 5% and 8%. The experiment 4 terminal whiteness increased by 1.6 degrees and 1.0 degrees compared with experiment 1 and experiment 2 respectively, the ink removal rate increased by 8% and 12%.


    1. Conclusion
      • From experiment data, the pulping effect and flotation effect of KG-280 and DA200 deinking agent are better than that of deinking agent 1 and deinking agent 2. The flotation effect in conclusion, the flotation accepts by adding KG-280 deinking agent turns out that will increase 1 degree whiteness, and the ERIC value is lower than 10%. The whiteness of the flotation accepts of the DA200 deinking agent is 0.5 degree higher, and the ERIC value is more than 3%.
      • From the flotation foam, KG-280 foam is moderate, close to soap, black foam surface. Deinking agent KG-280 is more suitable for horizontal flotation tank with less foaming agent, deinking agent DA200 is more suitable for vertical flotation tank with a large amount of defoaming agent.