Neutralization Agent
It serves as a powerful neutralizing agent for acidic solutions in chemical manufacturing and wastewater treatment.
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Alfa Chemistry's caustic soda flake (sodium hydroxide flakes) is a high-quality, versatile chemical product commonly used in various industrial applications. Known for its strong alkaline properties, it is widely employed in industries ranging from chemical manufacturing to textiles, soap production, and metal processing.
| Items | IS-I | IL-I | IL-II | IL-III |
| Sodiumhydroxide | ≥ 98% | ≥ 50% | ≥ 45% | ≥ 30% |
| Sodium carbonate | ≤ 0.8% | ≤ 0.5% | ≤ 0.4% | ≤ 0.2% |
| Sodium chloride | ≤ 0.05% | ≤ 0.05% | ≤ 0.03% | ≤ 0.008% |
| Ferric oxide | ≤ 0.008% | ≤ 0.005% | ≤ 0.003% | ≤ 0.001% |
Our caustic soda flake is used in a wide range of industries and processes:
It serves as a powerful neutralizing agent for acidic solutions in chemical manufacturing and wastewater treatment.
It is a key ingredient in the production of various sodium salts, which are fundamental in a wide range of chemical formulations.
It is essential for the saponification process in soap production, turning fats and oils into soap and glycerin.
It is a key ingredient in metal cleaning and galvanization, removing surface contaminants to prepare metals for further processing or coating.
Utilized in the bleaching of various materials, including textiles and paper, to achieve a cleaner, brighter product.
Alfa Chemistry's caustic soda flake is a high-purity, colorless crystalline solid widely used in industries such as chemical manufacturing, soap production, textiles, and metal processing. For more information, please feel free to contact us.
Sunarsih, E. S., et al. Journal of Physics: Conference Series. 2556. 1. (2023).
Sodium hydroxide (SH) acts as a critical alkaline activator for fly ash-slag-based geopolymer mortar, enabling cement replacement to reduce CO2 emissions while regulating key mechanical and fresh properties.
Fabrication Process: The mortar was formulated with 30% slag (fly ash substitute), sand (binder:sand = 1:2), and alkaline activator (SH + sodium silicate, SS/SH = 1.5, Al/Bi = 0.45). SH molarity varied (1M–10M), prepared 24h prior to mixing. Dry ingredients (fly ash, slag, sand) were blended, followed by activator addition. Samples were cast, demolded after 24h, and ambient-cured for 7 days before testing.
Performance Evaluation: Workability decreased with increasing SH molarity (flow diameter: 160.5mm at 1M to 120mm at 10M) due to higher viscosity. Setting time was faster at low molarity (4M: 44min initial) and slower at high molarity (10M: 129min initial). Compressive strength peaked at 6M SH (46.86MPa), declining at >6M due to inhibited calcium dissolution. 1M, 2M, 8M, and 10M SH met ASTM setting time requirements, making SH a versatile, eco-friendly activator for construction applications.
Prokof'ev, V. Yu, et al. Applied Clay Science 101 (2014): 44-51.
Sodium hydroxide (NaOH) serves as a critical alkali activator for synthesizing granulated LTA and SOD zeolites from mechanochemically activated metakaolin, enabling controlled phase formation via adjustable concentration and process parameters.
Fabrication Process: Metakaolin, NaOH, and γ-Al2O3 (30–50 mol% excess for LTA) were mechanically activated for 5 min, mixed with 25–30 wt% water, and extruded into 3 mm granules. Granules were dried (110℃, 4 h), thermally treated at 600℃ for 4 h, then hydrothermally crystallized (95–100℃, 4 h) in NaOH solutions (2–8 mol/L).
Performance Evaluation: XRD/IR confirmed phase formation—2–4 mol/L NaOH yielded LTA (>90 wt%) with cubic crystals (0.6–0.8 μm), while ≥8 mol/L produced SOD (92 wt%) with plate-like particles (0.3–0.7 μm). Optimal γ-Al2O3 excess (30–50 mol%) and 600℃ thermal treatment maximized crystallinity, avoiding nepheline formation. SEM showed low defectiveness (mean-square microdeformation <0.21%) for both zeolites. NaOH concentration regulates framework assembly, making it suitable for industrial adsorbent/catalyst production.
Doelle, K., et al. IOP Conference Series: Materials Science and Engineering. 301. 1. 2018.
Sodium hydroxide (NaOH) acts as a key component in a hybrid oxygen bleaching system with calcium hydroxide (Ca(OH)2) for yellow pine Kraft pulp, enhancing delignification efficiency while reducing environmental impact and reactor scaling.
Fabrication Process: Commercial yellow pine Kraft pulp (initial Kappa number 11–12) was bleached in a Quantum reactor. The hybrid system used NaOH (0–15 wt.% OD pulp) and Ca(OH)2 (0–15 wt.% OD pulp) at 90°C, 90 PSI for 60 min. Pulp was washed post-bleaching with deionized water via vacuum filtration, dewatered, and homogenized for Kappa number measurement (TAPPI T 236 om-06).
Performance Evaluation: Optimal bleaching was achieved with 4% NaOH + 2% Ca(OH)2, reducing lignin content (lower Kappa number) without excessive cellulose degradation. Increasing NaOH concentration improved bleaching efficiency, while Ca(OH)2 mitigated scaling. Extending time to 180 min or temperature to 110°C further enhanced delignification. The hybrid system reduced effluent COD vs. NaOH alone, offering a cost-effective, eco-friendly alternative for pulp bleaching in papermaking.
