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The role of Aluminum Sulfate in papermaking and its preparation
Sizing commonly used Aluminum Sulfate as a precipitant, its main chemical composition is aluminum sulfate with 14~18 crystalline water, Al2O3 content of 14~15%. Aluminum sulfate is easy to dissolve, and its solution is acidic and corrosive. Aluminum sulfate containing impurities should not be too much, especially iron salts can not be too high, otherwise it will be with rosin gum, dyes and chemical reactions, affecting the color of paper.
Aluminum sulfate in papermaking plays a great role, first of all, the need for sizing, while it also meets the other requirements of papermaking. The solution of aluminum sulfate is acidic, the addition of more or less aluminum sulfate will have a direct impact on the pH value of the pulp on the Internet changes. Although the paper is now being transformed to neutral or alkaline, but the role of aluminum sulfate in papermaking still can not be ignored.
Research shows that: by adjusting the pH value of the netting to control the δ-potential, can effectively improve the water filtration and retention rate of the netting pulp, and can effectively use talc to control the resin barrier. Appropriate increase in the dosage of aluminum sulfate to reduce the pH of the pulp, can also effectively reduce the adhesion of the pulp, reduce the press hair sticky rolls caused by the head break. Usually manifests itself once the press paper hairs more, can be appropriate to increase the dosage of aluminum sulfate a little. But the dosage of aluminum sulfate should be properly controlled, if the dosage is too much, not only waste, but also make the paper brittle. And lead to corrosion of paper machine parts and the loss of nets and blankets. Therefore, aluminum sulfate dosage is generally controlled by controlling the pH value between 4.7 and 5.5.
Company Information
Our company's main export products include
(1) Petroleum Resin
Petroleum resins are named after the petroleum derivatives from which they are derived. They are characterized by low acid value, good miscibility, resistance to water, ethanol and chemicals, chemical stability to acids and bases, viscosity regulation and good thermal stability. Petroleum resins are generally not used alone, but as accelerators, modifiers, modifiers and other resins.
(2) Polyacrylamide
Polyacrylamide (PAM) is a linear polymer with the chemical formula (C3H5NO)n. It is a hard, glassy solid at room temperature, with products such as glue, latex and white powder, translucent beads and flakes. Good thermal stability. Can be dissolved in water in any proportion, and the aqueous solution is a uniform transparent liquid. The viscosity of the solution will decrease after long-term storage due to the slow degradation of the polymer, especially when the storage and transportation conditions are poor. Polyacrylamide is widely used as lubricant, suspending agent, clay stabilizer, oil repellent, water loss reduction agent and thickening agent in drilling, acidizing, fracturing, water plugging, well cementing, and secondary and tertiary oil recovery, and it is a kind of extremely important oilfield chemicals.
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Main Product:
Polyaluminum Chloride,
Polyacrylamide Product,
Polymerized Ferrous Sulfate ,
Super Absorbent Polymer,
Petroleum Resins,
Sodium Polyacrylate
