Application of caustic soda in the paper industry

The use of perak profit in the production of paper industry pulp Baking soda or sodium hydroxide NaoH, which is also known by other names such as caustic soda and caustic soda, is one of the most widely used water purification chemicals and has high alkalinity. Due to the very high reactivity of this material and the ability to adjust its pH, it has a great impact on purification and decolorization, and for this reason, its applications are wide. is. The process of using this material in the production of paper pulp, which is known as kraft, is as follows: Application of sodium hydroxide in paper making In paper pulp, the presence of wood chips is one of the biggest challenges, which has a negative effect on the final quality of the work. To solve this problem, the combination of sodium hydroxide and sodium sulfide can be used. The combination of these two chemicals finally creates the White Liquor solution. After this solution enters the paper pulp, several reactions are performed and the amount of sodium hydroxide in it will gradually decrease. By reducing the amount of sodium hydroxide, the solution is faced with a change in its appearance and chemical properties, and the remaining solution is called Green Liquor, which contains sodium carbonate. With the reduction of sodium hydroxide in paper pulp, there is still a large amount of impurities that can be removed with lime. After separating the sodium carbonate and performing the calcination processes, the black liquor solution will remain. Application of perak profit in the production of recycled paper Among other uses of caustic soda in paper production, we can mention the improvement of recycled paper pulp. The presence of ink remaining on waste and used papers leads to a change in the color of the pulp and a decrease in its quality. To solve this problem, you can use soda ash in recycled paper pulp. After entering the paper pulp, these materials remove the ink at a very high speed and increase the final quality of the paper production line to a great extent. Use of caustic soda in paper bleaching One of the most important factors in determining the quality of paper is its color. The whiter and more polished the paper is, the higher its quality will be. Using soda ash in the process of removing paper chips in its primary pulp is one of the most important steps in this field. In addition, sodium hydroxide has a strong decolorizing effect due to its high reactivity and has the ability to remove the brown color of wood from paper. The role of caustic soda in paper purification In order to increase the quality of paper and purify it, caustic soda can also be used. This method is used for production lines that use sulfate and sulfite in the production of dough. For purification under these conditions, the percolic acid leads to the removal of lingin compounds. For this reason, in the end, a very pure and high-quality pulp is produced and the output is white paper. In addition to the above, in the paper industry, soda ash is used for washing equipment and devices and degreasing. Of course, the amount of these materials in the washing process is considered as low as possible so as not to lead to surface corrosion. In addition, in all stages of production, using special equipment such as chemical injection packages in a safe environment, the filler is introduced into the dough. Because these compounds are corrosive and will lead to skin burns and serious damage to vision and respiratory system.