Slaked Lime[2]
Overview
Hydrated lime (calcium hydroxide) is a versatile inorganic compound extensively used in the dye manufacturing sector. Its alkaline properties make it ideal for pH regulation in dye baths, where precise acidity control determines color consistency and fabric affinity. In textile wastewater treatment, it neutralizes acidic effluents and precipitates heavy metals. The compound also serves as a traditional mordant for natural dyes, improving colorfastness on cellulose fibers like cotton and linen.
Physical and Chemical Properties
As a fine white powder with a density of 2.21 g/cm³, hydrated lime exhibits low water solubility (1.73 g/L) but forms a strongly alkaline solution (pH ~12.4). It undergoes carbonation when exposed to air, gradually converting to calcium carbonate. The thermal decomposition point of 580°C makes it stable under normal dyeing temperatures. Its reactivity with acids enables precise pH adjustments, while the high surface area of industrial-grade powder ensures rapid dissolution in dye baths.
Main Applications
In synthetic dye production, hydrated lime neutralizes acidic byproducts during diazotization reactions. For indigo vat dyeing, it maintains the reducing environment necessary for dye solubilization. Wastewater treatment accounts for 40-60% of industrial consumption, where lime precipitates dissolved metals and adjusts pH before discharge. Emerging applications include eco-friendly dye processes, where it replaces harsher alkalis like sodium hydroxide.
Safety and Storage
Requires corrosion-resistant packaging (typically 25kg multilayer paper bags or 1-ton bulk bags) with moisture barriers. Storage areas must be dry and ventilated to prevent caking from atmospheric CO₂ absorption. Personnel handling powdered lime need NIOSH-approved N95 masks, chemical goggles, and acid-resistant gloves. First aid for eye contact mandates 15-minute flushing with water followed by medical evaluation due to risk of corneal damage.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification for consistent quality. Technical specifications should specify minimum 90% Ca(OH)₂ content with ≤5% magnesium hydroxide impurities. Bulk purchases (20+ tons) typically offer 10-15% cost savings. Verify delivery schedules align with production needs, as prolonged storage degrades product efficacy. Sample testing for reactivity rate and residue percentage is recommended before large orders.
Related Manufacturers
- 主营：氧化钙、氢氧化钙、氧化钙块料、高纯度熟石灰、细粉熟石灰、低杂质熟石灰、轻质熟石灰、散装熟石灰、食品级熟石灰、土壤改良熟石灰、化工熟石灰、氧化钙粉料、氧化钙颗粒、200目氢氧化钙、400目氢氧化钙、石灰石、超细氢氧化钙、块状氢氧化钙、无尘氢氧化钙、工业级氢氧化钙、烟气脱硫氢氧化钙、高纯度氢氧化钙、废水处理氢氧化钙、高白度氢氧化钙、块料氧化钙
- 主营：墙板安装、纳米碳酸钙、超细活性钙、熟石灰、轻质碳酸钙粉、填充轻钙重钙粉
- 主营：氧化铁脱硫剂、脱硫设备、沼气脱硫设备、熟石灰、气体中硫化氢的脱除
- 主营：保险粉、硫酸铜、十八醇、熟石灰现货供应、防冻粉、消毒剂、溶剂油、硫酸铵、氯化镁、氯酸钠、活性炭、水杨酸、丙三醇、防腐剂、匀染剂、洛烷酮、平平加、防水剂、消泡剂、水合肼、硫酸钠、乙二醇、氯化钙、氯化钾、石灰氮、氟化钠
- 主营：熟石灰、清洗剂、葡萄糖、聚合氯化铝
- 主营：杀菌剂、椰子油、印染剂、熟石灰、阻燃剂、油酸锌、润湿剂、硫酸铯、催化剂、粘合剂、乳化剂、草酸锰、硫酸锂、石英砂、绝缘油、茶皂素、防腐剂、醋酸镁、锂电池、碘化锂、培养基、蒸馏水、硬脂酸、塑化剂、草酸钾、磷酸铁
- 主营：干燥粉、氧化钙、生石灰粉、熟石灰、营养补充剂、环氧胶黏剂
- 主营：硫酸钡、海泡石粉、小苏打、熟石灰、碳酸钙、生石灰、煅烧高岭土、硅藻土、工业尿素、三聚氰胺、氧化铁颜料
- 主营：石英砂、鹅卵石、火山岩、熟石灰、雪花白石子、精制石英砂、水洗石、火山石、金刚砂、夜光石、天然彩色石子、抛光鹅卵石、洗米石、玻璃珠、氢氧化钙、玻璃砂、珊瑚石、钙基黄色膨润土、高粘膨润土、纳基膨润土、有机复合膨土、火山岩板材、灰色火山岩板材、多孔火山岩板材、黑色石英砂、无尘金刚砂
- 主营：洗涤碱、透明液体、分析试剂、熟石灰、酸度调节剂、表面活性剂、十二烷基苯磺酸钠、AOS粉、乳酸、乙醇
- 主营：次氯酸钠、石灰、铝酸钠、熟石灰氢氧化钙、熟石灰、聚丙烯酰胺、复合碳源、乙酸钠、磁粉、氧化钙、除氟剂、片碱、消泡剂、葡萄糖、柠檬酸、小苏打、生石灰、固体聚合氯化铝、工业级聚合氯化铝、混凝剂、絮凝剂、次氯酸钙、高纯度漂白粉、漂白粉、工业级次氯酸钙
- 主营：增塑剂、二甲基亚砜、顺酐、国标染料、环丁砜、二甲基二硫醚、赋臭剂、四氢噻吩加臭剂、环戊烷、塑化剂、二辛酯、石油醚、异丁醇、氯化苄、叔十二硫醇、硬脂酸钙、树脂涂料、四氢噻吩、化学试剂、氯乙酸、硬脂酸锌、乙二醛、异辛烷、橡胶塑料
- 主营：精己二酸、对苯二甲酸、二甲基甲酰胺、熟石灰、碳酸钾、氨水、液碱、醋酸、二甲苯、甲醇、乙二醇、二乙二醇、醋酸乙酯、对苯二甲酸二甲酯、柠檬酸、磷酸二氢钾、聚丙烯酰胺、氯化钠
- 主营：融雪剂、亚硝酸钠、味精、熟石灰、二甲苯、磷酸、甲酸、异丙醇、苯酚
- 主营：氧化钙、石灰石粉、雪花矿岩、橡胶用白云石粉、饲料添加用高钙粉、水性涂料用大白粉、造纸化工用、碳酸钙粉、高钙钙粉、防水涂料、干粉砂浆重钙粉、干燥生石灰颗粒、脱硫钙粉、重质碳酸钙粉、分析纯氢氧化钙、400目氧化钙、低铁白云石、石灰石粉污水处理、工业涂料油漆、饲料添加造纸、脱硫石灰石粉、涂料 大白粉、石灰石粉磨粉、油性填料方解石粉、高白度涂料
- 主营：石英砂、金刚砂、金刚砂地坪材料、熟石灰、白云石、蛭石、云母、轻钙粉、重钙粉、重晶石粉、质感砂、鹅卵石、白沙子、火山石、方解石、高岭土、球场砂、草坪砂、石英砂滤料、滑石粉、膨润土、凹凸棒土、橡胶粉、陶土粉、麦饭石粉、石英粉