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Acid Washed Activated Carbon

Acid washed activated carbon is made from high-quality coal activated carbon or coconut shell activated carbon, which is acid-washed. The product is mainly made from granular carbon, which is acid washed during the manufacturing process to remove unwanted impurities, resulting in a product with very low acid soluble iron content. Its superior hardness levels and low levels of impurities make it cleaner than most other carbons and give it a longer service life.

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Nanping Yuanli Active Carbon Company is one of the most reliable manufacturers and suppliers of acid washed activated carbon in China. Please rest assured to wholesale customized acid washed activated carbon from our factory. If you have any enquiry about free sample, please feel free to email us.

Fujian Yuanli Active Carbon Co., Ltd

Fujian Yuanli Active Carbon Co., Ltd. (Stock Code: 300174) is an enterprise group contains business units of activated carbon, sodium silicate and precipitated silica. The company grows and develops based on the strategy of technology innovation and resources integration.

Why Choose Us

Technical Service

Yuanli's professional technical team provides gas and liquid phase adsorption testing, pilot tests, process design, and on-site installation, along with technical solutions and regeneration recommendations for activated carbon.

Technical Team

Yuanli has over 200 technical experts and 120+ technical patents. It features a national key laboratory, an activated carbon R&D center, and a D-grade dust-free workshop for pharmaceuticals.

Sales Network

We have seven facilities--HQ LX plant, LZ plant, LY plant, HYS plant, MZL plant, XJH plant & PJ plant.

Our international sales office distribute in Italy, Thailand, South America and Korea

ESG

Besides creating benefits for our shareholders, taking the social responsibility is also Yuanli's mission. We insist to use sustainable raw materials to achieve carbon neutrality, we provide 100+ jobs for the disabled.

Activated Carbon for Gold Recovery

It has characteristics of advanced pore structure, high hardness, high purity, which guarantee its performance in water purification, liquid phase decolorization, precious metal extraction, catalyst carrier,solvent recovery, air purification, etc.

Coconut Shell Activated Carbon Filter Media

HA series is granular activated carbon product using coconut as raw material which can be used for Coconut Shell Activated Carbon Filter Media. We can customize the product for our customers.

Coconut Shell Activated Carbon for Gold Extracting

Yuanli HA series activated carbon are used for gold extracting. It has the characteristics of high adsorption performance, low resistance and high adsorption efficiency, and is widely used in the adsorption treatment of gold extraction and other fields.

Acid Washed Activated Carbon

Acid activated carbon, using selected coconut shell raw materials, through activation, crushing and screening, fine washing dust removal and pickling more than ten processes refined.

Coconut Shell Catalyst Activated Carbon

Yuanli catalytic activated carbon series can provide high-purity pickling products with extremely low iron/sulfur content, minimizing the impact of impurities on your products.

Solvent Recovery Activated Carbon

The shape is amorphous particles, with high mechanical strength, developed pore structure, large specific surface area, fast adsorption speed, high adsorption capacity, easy to regenerate, durable and other characteristics of environmental protection activated carbon.

Coconut Shell Steam Activated Carbon

Cigarette smoke includes various compounds that can irritate and potentially harm living organisms. While standard filters do not effectively remove these compounds, Activated Carbons can successfully and selectively capture them.

Coconut Shell Activated Carbon Water Filter

It features an advanced pore structure, high hardness, and high purity, ensuring effective performance in water purification, liquid phase decolorization, precious metal extraction, catalyst support, solvent recovery, air purification, and more.

Coconut Shell Carbon Filter

Cigarette smoke contains numerous substances that can irritate and possibly damage living beings. Standard filters are not efficient at eliminating these substances, but Activated Carbons can effectively and selectively trap them.

Specifications

Product Name	Acid Washed Activated Carbon	Brand	YL
Mesh size: 12×40
Model Number	HA	Tech	Activation
Moisture Content	GB/T 12496	%	≤5
Ash Content	GB/T 12496	%	≤3
PH	GB/T 12496	/	5~8
Iodine value	GB/T 12496	%	1000~1300
Hardness	ASTM	%	≥95

What is Acid Washed Activated Carbon

Benefits of Acid Washed Activated Carbon

Reduced Heavy Metal Content
During the acid washing process, hydrochloric acid effectively dissolves inorganic salts and heavy metal compounds from activated carbon. Subsequent water washing further reduces the heavy metal content, enhancing water safety.

Lower Ash Content
Acid washing dissolves inorganic salt impurities, such as calcium carbonate, reducing the ash content significantly. For instance, un-acid-washed coconut shell activated carbon typically contains around 5% ash. Post-acid washing, this can drop to less than 3%, and with deep acid washing, it can reach less than 1%, clarifying water quality.

PH Adjustment and Taste Improvement
Ordinary activated carbon typically has a pH between 9-11. Deep acid washing can lower this to a controlled pH range of 7-8.5, aligning well with the pH of drinking water (7.1-7.6), thereby improving taste and usability.

Reduction of Surface Dust and Black Water
Deep acid washing removes surface dust and ash from activated carbon pores, reducing black water formation. This process involves extensive flushing with softened water, crucial for maintaining membrane integrity in water purification systems.

How to Improve Adsorption Performance of Acid Washed Activated Carbon

Acid washed activated carbon is well-known for its enhanced adsorption properties, which make it far superior to untreated activated carbon for certain high-purity applications. The key to this improvement lies in the acid washing process itself, which involves treating the carbon with an acid usually hydrochloric acid to remove impurities like heavy metals, ash, and calcium carbonate from its internal structure. This meticulous process not only improves the carbon's adsorption capacity but also extends its operational life and reduces issues like dusting and black water formation.

What are the Forms of Acid Washed Activated Carbon?

Powdered Activated Carbon (PAC)

Fine particles, typically less than 100 microns in size, used for water treatment, air purification, and in chemical processes.

Granular Activated Carbon (GAC)

Larger particles compared to PAC, typically used in filtration systems, water treatment plants, and for gas purification.

The Difference Between Acid Washed Activated Carbon and Non-Acid Activated Carbon

Acid washed carbon undergoes a specialized treatment process involving the use of hydrochloric acid to cleanse its surface and pores thoroughly. This procedure effectively dissolves and removes inorganic salts and heavy metal compounds, significantly reducing their presence in the activated carbon. As a result, acid washed carbon boasts lower levels of heavy metals and a reduced ash content compared to its non-acid washed counterpart. The controlled acid washing process also adjusts the carbon's pH to a range typically between 7 to 8.5, which aligns well with the pH of drinking water, enhancing its suitability for various purification applications. Additionally, this thorough cleaning minimizes surface dust and ash accumulation, thereby reducing the likelihood of black water formation and prolonging the lifespan of filtration systems.

Non-acid washed carbon, in contrast, lacks the rigorous acid treatment that characterizes its acid washed counterpart. As a result, non-acid washed carbon retains higher levels of heavy metals and inorganic salts on its surface and within its pores. The ash content in non-acid washed carbon tends to be higher, often exceeding 5% in materials like coconut shell activated carbon. This higher ash content can compromise filtration efficiency and may contribute to more frequent maintenance needs in water purification systems. Furthermore, non-acid washed carbon typically exhibits a higher pH range, typically between 9 to 11, which may not be suitable for all water treatment applications and can affect the taste and quality of treated water. Without the acid washing process, non-acid washed carbon is also more prone to accumulating surface dust and ash, which can lead to issues such as black water formation during filtration processes.

Application of Acid Washed Activated Carbon

Water Treatment
One of the primary uses of acid washed activated carbon is in water treatment systems. Its ability to remove chlorine, chloramine, and other contaminants ensures that the water is safe and palatable. Whether used in municipal water treatment plants or home filtration systems, acid washed carbon helps provide cleaner and better-tasting water.

Food and Beverage Industry
In the food and beverage industry, maintaining product purity is critical to both safety and flavor. Acid washed activated carbon plays a vital role in ensuring that water used in production processes is free from contaminants that could affect the taste or safety of the final product. It is especially popular in the manufacturing of soft drinks, beer, and spirits.

Pharmaceuticals
The pharmaceutical industry is another area where acid washed activated carbon is essential. The carbon's ability to remove even trace amounts of organic and inorganic contaminants makes it ideal for applications that require ultra-pure water, such as dialysis and other medical treatments.

Electronics and Semi-Conductor Manufacturing
In industries like electronics and semi-conductor manufacturing, even the smallest impurities can cause defects in products. Acid washed activated carbon is widely used to purify water that comes into contact with electronic components, ensuring that no harmful contaminants interfere with production.

Industrial Air Filtration and Pollution Control
Another emerging application of acid washed activated carbon is in air filtration systems. As industries seek to reduce their environmental impact, the ability of acid washed carbon to adsorb harmful gases and volatile organic compounds (VOCs) makes it an ideal solution for air purification.

What Factors Should Be Considered When Choosing Acid Washed Activated Carbon?

Iodine Number

The iodine number is one of the most critical specifications when it comes to evaluating the adsorption capacity of acid washed activated carbon. This number measures how much iodine the carbon can adsorb and is often used as a benchmark to gauge its effectiveness for removing organic contaminants.

Particle Size

Another essential specification is particle size, which determines the speed and efficiency of the filtration process. Acid washed activated carbon is available in various forms, including granular activated carbon (GAC) and powdered activated carbon (PAC), each suited for different applications.

Hardness and Durability

The hardness of acid washed activated carbon is an important specification for ensuring the carbon's durability during use. Hardness is especially critical in applications where the carbon is subject to high-pressure conditions, frequent backwashing, or long operational periods, such as in industrial water treatment systems.

Ash Content

The ash content in activated carbon refers to the inorganic residue left after the carbonization process. Lower ash content is desirable because it reduces the amount of impurities that can interfere with adsorption processes. Acid washed activated carbon typically has a much lower ash content compared to non-acid washed variants.

Moisture Content

Moisture content is another factor to consider when selecting acid washed activated carbon. While all activated carbon contains some moisture, lower moisture content ensures that more of the carbon's surface area is available for adsorption. Low moisture content helps prevent the carbon from becoming saturated too quickly, thereby extending its operational life and reducing the frequency of replacements.

How is Acid Washed Activated Carbon Made?

01/

Selection of Raw Material: The process starts by choosing a carbonaceous material like wood, coal, or coconut shells, which are rich in carbon.

02/

Carbonization: The raw material is carbonized by heating it in an inert environment, usually in the absence of oxygen, to remove volatile components and increase the carbon content. This forms a basic carbon structure.

03/

Acid Treatment: The carbonized material is then soaked in a concentrated acid solution, typically sulfuric acid or phosphoric acid. The acid treatment enhances the porosity of the carbon by removing impurities, ash, and by creating additional internal surface area.

04/

Washing: After acid treatment, the activated carbon is thoroughly washed with water to remove any residual acid and other soluble impurities.

05/

Drying: The washed activated carbon is dried at a high temperature to remove moisture and ensure it is in a usable form.

06/

Activation: The final step involves heating the acid-treated carbon at a controlled temperature. This activation process further enhances the pore structure, making it highly porous and increasing its surface area.

How Acid Washed Activated Carbon Contributes to Sustainability

Reducing Harmful Contaminants in Water
One of the most important environmental benefits of acid washed activated carbon is its ability to remove harmful contaminants from water sources. Water pollution is a critical global issue, and by using acid washed activated carbon in treatment plants and filtration systems, industries can significantly reduce the presence of dangerous pollutants such as heavy metals, volatile organic compounds (VOCs), and chlorine.

Improving Air Quality in Industrial Processes
Acid washed activated carbon is also widely used in air filtration systems, where it helps reduce emissions of harmful gases and volatile organic compounds. In industrial settings, air pollution can have a devastating impact on both local communities and the environment. The ability of acid washed carbon to adsorb airborne contaminants makes it an essential tool in reducing industrial emissions.

Supporting Sustainable Manufacturing Practices
The production and use of acid washed activated carbon are aligned with sustainable manufacturing practices, contributing to a circular economy. Activated carbon itself is often made from renewable raw materials such as coconut shells, which are a byproduct of the coconut industry, making it a sustainable and eco-friendly resource. Furthermore, acid washed carbon can be recycled and reactivated, extending its lifespan and reducing waste.

Reducing Waste in Industrial Processes
Acid washed activated carbon helps industries reduce waste and enhance the efficiency of purification systems. In industries such as oil and gas, food and beverage, and pharmaceuticals, the use of acid washed carbon leads to less frequent filter changes and longer system operational times, thereby minimizing the waste generated by these industries.

FAQ

Q: What is acid-washed activated carbon, and how does it differ from regular activated carbon?

A: Acid-washed activated carbon is a specialized type of activated carbon that undergoes an additional purification process using strong acids. This process effectively removes impurities and ash content, resulting in a purer product with a higher degree of adsorption. It is particularly suitable for applications that require ultra-clean and highly efficient filtration.

Q: What are the common applications for acid-washed activated carbon?

A: Acid-washed activated carbon is ideal for various applications, including water purification, beverage and food processing, pharmaceuticals, air and gas purification, and more. Its high purity and efficient adsorption properties make it a top choice for industries where quality and consistency are paramount.

Q: How does acid-washed activated carbon ensure better quality in filtration processes?

A: Acid-washed activated carbon's additional purification process results in a product with fewer impurities. This enhanced purity means it can effectively adsorb a broader range of contaminants, ensuring that the filtration process is more thorough and consistent.

Q: Are acid-washed activated carbon products environmentally friendly?

A: Yes, acid-washed activated carbon can be an environmentally friendly choice. It is often produced from renewable resources and is a highly effective means of removing contaminants, which can contribute to a cleaner environment. We also emphasize sustainable production practices.

Q: How does acid washed activated carbon differ from non-acid washed carbon?

A: The key difference between acid washed and non-acid washed activated carbon lies in purity and performance. Ash is a residue left behind after the carbonization process, which can block the pores of activated carbon and reduce its effectiveness. Acid washed carbon has a lower ash content, generally below 1%, compared to 5% or higher in non-acid washed carbon.

Q: Why is acid washed activated carbon preferred for water purification?

A: Acid washed activated carbon is ideal for water purification because of its enhanced adsorption capacity, reduced ash content, and ability to remove specific contaminants like chlorine, VOCs, and heavy metals. These properties make it especially effective in sensitive applications where water purity is critical, such as in reverse osmosis systems, dialysis, and municipal water treatment.

Q: Can acid washed activated carbon be recycled or reactivated?

A: Yes, acid washed activated carbon can often be reactivated through thermal processes. Reactivation involves heating the carbon to a high temperature in an oxygen-limited environment, which restores its adsorption properties by removing the contaminants that have built up on its surface.

Q: What factors should be considered when choosing acid washed activated carbon?

A: Iodine Number: A measure of the carbon's adsorption capacity. Higher iodine numbers indicate greater effectiveness in adsorbing small organic molecules. Particle Size: Choose between granular activated carbon (GAC) and powdered activated carbon (PAC) based on the application. GAC is typically used for continuous filtration, while PAC is better for fast adsorption in batch processes.

Q: Why acid washed activated carbon is preferred in high-purity applications?

A: Acid washed activated carbon is favored in industries requiring extreme levels of purity. Its ability to effectively adsorb organic and inorganic compounds, combined with its reduced ash and heavy metal content. In dialysis and other medical treatments, the purity of water is paramount. Acid washed activated carbon helps remove impurities that could interfere with patient care.

Q: What makes acid washed activated carbon different?

A: Acid washed activated carbon undergoes an additional process that differentiates it from standard activated carbon. During the acid washing phase, carbon is treated with hydrochloric acid, which removes metallic impurities like iron, calcium, and magnesium. This results in a material with significantly lower ash content and fewer soluble impurities.

Q: What is the pH of acid washed activated carbon?

A: Ordinary activated carbon typically has a pH between 9-11. Deep acid washing can lower this to a controlled pH range of 7-8.5, aligning well with the pH of drinking water (7.1-7.6), thereby improving taste and usability.

Q: How does acid-washed activated carbon improve air quality?

A: In industrial settings, air pollution can have a devastating impact on both local communities and the environment. The ability of acid washed carbon to adsorb airborne contaminants makes it an essential tool in reducing industrial emissions.

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