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Hydrated Lime (Calcium Hydroxide)

Hydrated Lime, a versatile calcium hydroxide powder used in water treatment, construction, and industrial processes across East Africa.

Hydrated Lime, chemically known as Calcium Hydroxide, functions primarily as a powerful alkaline agent that neutralizes acidic conditions and adjusts pH levels in a variety of industrial environments.

Packaging

25 kg bags, 50 kg sacks, 200 kg drums

Supply Region

Kenya, East Africa

Supplier

Zenco Systems Ltd

What is Hydrated Lime (Calcium Hydroxide)?

Hydrated Lime, chemically known as Calcium Hydroxide, functions primarily as a powerful alkaline agent that neutralizes acidic conditions and adjusts pH levels in a variety of industrial environments. Its ability to react readily with acids and to bind with impurities makes it a key component in processes such as water purification, soil stabilization, and textile treatment. In industries spanning from construction to food processing, it plays an essential role by enhancing material properties or ensuring product safety. Zenco Systems Ltd supplies this product reliably across East Africa, including Kenya, Uganda, and Tanzania, serving manufacturers, water utilities, and agricultural operations that demand a consistent and high-purity Ca(OH)₂ source.

The commercial importance of hydrated lime arises from its multifaceted utility combined with ease of handling as a dry powder. Its chemical robustness and relatively low cost underpin its wide adoption, especially in regions requiring effective water treatment and soil amendments. As a supplier deeply embedded in the local industrial chemical market, Zenco Systems Ltd ensures hydrated lime meets stringent quality and logistical requirements demanded by East African customers.

Hydrated Lime (Calcium Hydroxide): Detailed Product Overview

Hydrated Lime is calcium hydroxide with the chemical formula Ca(OH)₂, appearing as a fine white crystalline powder. It is produced primarily by slaking quicklime (calcium oxide) with water. This chemical reaction yields calcium hydroxide, which is less caustic and easier to handle than quicklime but retains strong alkalinity.

At its core, hydrated lime acts as a strong base, dissociating in water to produce hydroxide ions (OH-) that increase the pH of the medium. This alkalinity enables it to neutralize acids and precipitate dissolved metals or contaminants in wastewater, making it indispensable in water and flue gas treatment. In soil stabilization, the lime chemically reacts with clay minerals, reducing plasticity and improving load-bearing capacity. This is critical for infrastructure in regions with soft or expansive soils.

Its physical properties, such as particle size and moisture content, influence reactivity and handling safety. Hydrated lime typically has a pH around 12.4 when in suspension, indicating strong alkalinity but with significantly less heat generation than quicklime slaking processes.

Performance in applications depends on purity and fineness; higher purity ensures fewer impurities that might interfere with reactions or cause discoloration in treated materials. Zenco Systems Ltd confirms key specifications like purity and grade upon request, helping customers optimize formulations. The powder's relatively low bulk density enables manageable transport and dosing across various industrial uses.

Because hydrated lime readily absorbs moisture and carbon dioxide from the air, it must be stored carefully to maintain effectiveness. It reacts slowly with carbon dioxide to form calcium carbonate, which reduces alkalinity over time. Consequently, shelf life and storage conditions directly impact its performance in critical applications.

Applications and Uses of Hydrated Lime (Calcium Hydroxide)

Water Treatment

Hydrated lime is widely applied in water treatment plants across East Africa to adjust pH and remove impurities. By increasing alkalinity, it causes dissolved metals such as iron and manganese to precipitate, making them easier to filter out. It also aids in flocculation, improving sedimentation efficiency. Dose rates typically range from 10 to 100 mg/L depending on water quality, and it is often combined with other coagulants. Reliable pH control with hydrated lime helps meet stringent drinking water standards.

Soil Stabilization

In construction and roadworks, hydrated lime chemically modifies clay-heavy soils by breaking down clay particle bonds and reducing swelling potential. This stabilizes the soil structure, improving its strength and load-bearing capacity. Application involves spreading and mixing hydrated lime powder with the soil followed by compaction. Typical lime content ranges from 3% to 8% by weight of the soil. This treatment extends pavement life and prevents cracking in tropical East African conditions.

Flue Gas Treatment

Industries emitting acidic gases such as sulfur dioxide benefit from hydrated lime as a reagent in flue gas desulfurization processes. Hydrated lime neutralizes acidic components, converting them into harmless salts and reducing atmospheric pollution. Its relatively low cost and effectiveness make it suitable for industrial boilers and cement production facilities. The powder is pneumatically fed into scrubbers or mixed with slurry to contact the gases.

Food Processing Additive

Food-grade hydrated lime is used in East African food industries for tasks such as nixtamalization in maize processing and pH adjustment in sugar refining. It acts as a mild alkaline agent that alters texture and enhances nutritional availability. Food-grade product handling requires strict purity standards and traceability. Dosing must be carefully controlled to meet safety regulations.

Construction Mortar and Plaster

Hydrated lime improves mortar and plaster work by enhancing workability, water retention, and flexibility. It reacts with carbon dioxide from air (carbonation) to gradually harden and strengthen masonry surfaces. This results in more durable and crack-resistant structures. Construction use involves blending hydrated lime with sand and cement at specific proportions, with common ratios around 1:3 lime to sand by volume.

Looking for alternatives for a specific process? Browse the full Textile Treatment range or ask our technical team which grade fits your application.

Benefits and Advantages

Effective pH Control

Hydrated lime provides precise alkalinity adjustment due to its predictable dissociation into hydroxide ions. This allows operators to maintain stable pH levels in water treatment or chemical manufacturing, ensuring consistent process performance and meeting regulatory limits.

Soil Strength Enhancement

Its chemical reaction with clay minerals reduces soil plasticity and shrink–swell behavior, which reduces maintenance needs and failure risks in infrastructure projects. This benefit helps extend the durability of roads and foundations in East Africa’s challenging geotechnical conditions.

Cost-Efficient Pollution Control

Hydrated lime offers an affordable alternative to other alkaline reagents for flue gas cleaning and wastewater neutralization. Its widespread availability and ease of transport in Kenya, Uganda, and Tanzania lower operational costs for industries needing reliable pollution mitigation.

Versatile Industry Compatibility

Because of its purity and consistent form, hydrated lime integrates smoothly across industries from textiles to food processing. This adaptability reduces supply chain complexity and enables multi-industry operators to standardize their chemical inventories.

Packaging Information

Hydrated Lime is supplied in 25 kg bags, 50 kg sacks, and 200 kg drums suited for storage and handling in East African industrial sites. Zenco Systems Ltd offers tailored bulk shipments for large-scale users, facilitating delivery logistics within Kenya, Uganda, and Tanzania. The packaging design ensures protection against moisture ingress, maintaining product quality during transit and warehousing.

Standard formats: 25 kg bags, 50 kg sacks, 200 kg drums

Storage and Handling

Store hydrated lime in a dry, well-ventilated area away from moisture and carbon dioxide exposure to prevent carbonation and caking. Use airtight containers or sealed bags once opened. Avoid combining with incompatible materials such as acids or ammonium compounds. Handling requires gloves, dust masks, and eye protection to prevent irritation. Keep away from food storage areas to avoid contamination. Typical shelf life varies, but effective storage can extend usability for over a year.

Safety Information

Hydrated lime is alkaline and can cause skin and eye irritation or respiratory discomfort if inhaled as dust. Use personal protective equipment such as gloves, goggles, and dust masks when handling. In case of contact, flush affected areas with plenty of water. Spills should be contained and cleaned with care to avoid dust dispersion. Consult the Safety Data Sheet (SDS) provided by Zenco Systems Ltd for comprehensive safety guidelines and disposal protocols.

Technical Specifications

pHApproximately 12.4 (in aqueous suspension)
GradeConfirm with supplier
PurityConfirm with supplier
FormulaCa(OH)₂
Packaging25 kg bags, 50 kg sacks, 200 kg drums
AppearanceWhite crystalline powder
CAS Number1305-62-0
SolubilitySlightly soluble in water (1.85 g/L at 20°C)
Chemical NameCalcium Hydroxide
Storage ConditionsDry, well-ventilated, moisture-free environment

Applications

  • Water treatment
  • Soil stabilization
  • Flue gas treatment
  • Food processing additive
  • Construction mortar and plaster

Technical Data Sheet (TDS)

pHApproximately 12.4 (in aqueous suspension)
GradeConfirm with supplier
PurityConfirm with supplier
FormulaCa(OH)₂
Packaging25 kg bags, 50 kg sacks, 200 kg drums
AppearanceWhite crystalline powder
CAS Number1305-62-0
SolubilitySlightly soluble in water (1.85 g/L at 20°C)
Chemical NameCalcium Hydroxide
Storage ConditionsDry, well-ventilated, moisture-free environment

Product Features

  • - Strong alkaline agent with pH ~12.4
  • - White crystalline powder form
  • - Produced by slaking quicklime
  • - Moderate water solubility
  • - Absorbs moisture and CO2 if exposed
  • - Stable under dry, controlled storage

Industries Served

  • - Water treatment plants
  • - Construction and civil engineering
  • - Agriculture and soil improvement
  • - Food processing industry
  • - Industrial manufacturing
  • - Chemical processing
  • - Environmental pollution control

Product Overview

Frequently Asked Questions About Hydrated Lime (Calcium Hydroxide)

What is Hydrated Lime (Calcium Hydroxide) used for?

It’s used to raise pH in water treatment, stabilize soils in construction, treat flue gases, act as a food processing additive, and improve mortar and plaster properties.

What is the typical dosage for water treatment applications?

Dosage ranges between 10 to 100 mg/L depending on water acidity and impurities, with optimized treatment combining lime with coagulants for efficient contaminant removal.

Is the Hydrated Lime supplied suitable for food-grade applications?

Food-grade hydrated lime requires higher purity and strict handling. Confirm with Zenco Systems Ltd if you need certified food-grade material.

How should Hydrated Lime be stored to maintain quality?

Store in dry, airtight containers in a well-ventilated area, protected from moisture and CO₂ to prevent carbonation and loss of alkalinity.

Does Zenco Systems Ltd supply Hydrated Lime outside Kenya?

Yes, Zenco Systems Ltd delivers across East Africa, including Uganda, Tanzania, Rwanda, and neighboring countries, with logistics tailored to cross-border transport requirements.

What personal protective equipment (PPE) is recommended when handling Hydrated Lime?

Wear gloves, eye protection, and dust masks to prevent skin or eye irritation and avoid inhaling dust during handling or transfer.

What packaging sizes are available for Hydrated Lime?

The product comes in 25 kg bags, 50 kg sacks, and 200 kg drums, with bulk options for large-scale industrial users.

What is the shelf life of Hydrated Lime?

If stored properly in dry conditions, hydrated lime can maintain its efficacy for over a year, though exposure to moisture and air will reduce its quality.

Can Hydrated Lime be mixed with other chemicals?

It should not be mixed with acids or ammonium compounds directly. Confirm compatibility for your specific application with Zenco Systems Ltd.

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