Paper production is a highly energy-intensive process as 20 to 25% of all the energy is required for the cellulose fibrillation, as it is one of the most vital methods in papermaking. It was observed that enzymatic treatment performed prior refining lessened the refining time for 10%. On the other hand, treatment after refining has proven to be ineffective.
The demand for paper is experiencing a consistent hike with evolving time. Although, there seems a hardship in the availability of fibers from natural sources. It has surged the need for recycling waste paper after its extensive usage, which has also found to be an eco-friendly and cost-effective process as compared to making a new paper.
You might be wondering how do we recycle the paper. Recycling has become possible by de-inking technology. The de-inking method not only facilitates the recycling of paper but consists of several other advantages such as utilizes less water, brings higher pulp yield, needs a smaller area for installation, and there is less total reagent cost.
In fact, various paper de-inking chemicals in India are available for papermaking industries that aid in recycling technologies.
What exactly are De-inking Agents?
The de-inking agent is a detergent that is used to recycle the waste paper. The de-inking agent has two primary functions that are mentioned below:
- Primary responsible for the detachment of ink by curtailing the surface tension between the ink and the pulp fiber during the ink removal process
- Foaming a froth that floats the ink off during the ink collection process, which further separate the ink from the pulp slurry
The method of ink removal is known as floatation, in which ink is ready to be dispersed by changing itself into fine particulates. The ink dispersed ink particulates are then absorbed onto the surface of air bubbles in a foam, which is further abstracted from the pulp.
Before you mix the de-inked pulp with the wood-pulp, it is vital to clean and bleach the de-inked pulp to get the best quality recycled paper. Once both the pulps are mixed, it is recycled into various types of paper, including copier paper, newsprint paper, and tissue paper.
Also, it is imperative to return the absorbed ink to a liquid state by foam breaking for the next stage of processing.
Composition of De-inking Agents
De-inking agents are composed of a non-ionic surfactant with a chemical structure in which AO (alkylene oxide) is added to fatty alcohol. On the other hand, numerous auxiliary agents are combined with de-inked agents, which help in the removal of the ink.
The other auxiliary supports to perform certain crucial functions such as improve the interaction between the foam, bubbles, and ink, causing the ink to be aggregate, and regulating foam volume.
The primary component of the de-inking agent fatty alcohol AO adduct is susceptible to temperature. The nature of sensitivity affects the foaming power and other properties.
Factors to consider before selecting De-inking Agents
The most significant factor that ought to be considered while selecting an ideal de-inking agent is its floatation mechanism, as floatation is solely responsible for the removal of the ink from wastepaper. Floatation process is quite complicated and can be adversely affected by an array of factors.
The other factors that can affect foaming power include the type of waste paper that is being recycled, the vigor of white water circulation, the type of floater used, pH, temperature, and many others.
Hence it can be concluded that one of the most important factors to be considered is foaming power that comprehensively relies upon the floatation mechanism.
In India, there are plentiful de-inking chemicals suppliers whom you can get in touch with. You can also check the list of best de-inking chemicals wholesale agents. They can aid in treating the waste paper while ensuring high foaming power and help you carry out the entire process effortlessly.