The use of reverse osmosis chemicals must adhere to operational specifications based on chemical type (scale inhibitors, dispersants, cleaning agents, biocides, reducing agents, etc.) and system conditions. The core principles are “precise dosing, scenario adaptation, and parameter control.” Specific methods are as follows: Scale inhibitors are typically added continuously via metering pumps before the security filter in the reverse osmosis system, with a concentration of 3-8 mg/L. Dosage must be calculated based on feed water hardness and recovery rate to ensure effective protective film formation on the membrane surface. Cleaning agents require offline circulation cleaning: First identify contamination type (colloidal, metal oxides, etc.), select corresponding agent type (acidic/alkaline), dilute to 1%-3% concentration, then circulate within the membrane system via a cleaning pump for 1-3 hours at 20-40°C. After cleaning, flush with permeate water until neutral pH is restored. Disinfectants are categorized as oxidative and non-oxidative. Oxidative agents (e.g., sodium hypochlorite) are dosed intermittently to maintain residual chlorine at 0.1-0.5 mg/L. Non-oxidative agents (e.g., isothiazolinone) require periodic shock dosing at 50-100 mg/L, followed by 30 minutes of circulation. Reduction agents must be added before the security filter to neutralize residual chlorine in the feed water to <0.1 mg/L. Dosage should be adjusted based on residual chlorine concentration, typically 1-3 mg/L, to prevent excessive residue that could impair membrane performance. Prior to use, verify compatibility of all chemicals with membrane materials. Regularly monitor parameters such as permeate flux and pressure differential to optimize dosing protocols.

The function of ceramic dispersant produced by Karui Chemical:

KR-908 is primarily used as an additive in industries such as magnetic materials, electronic ceramics, papermaking, alumina ceramics, and household ceramics. Adding ceramic dispersant KR-908 during the grinding process of slurry significantly reduces the viscosity of the processed material, facilitating material processing while ensuring stable viscosity of the dispersed slurry. It completely volatilizes during product calcination, leaving no impact on the physical and chemical properties of the final product. This product generates minimal foam, is non-toxic, non-corrosive, and classified as non-hazardous.

For more information, please visit:
http://www.krchemical.com/03-kr-908.htm

Currently, there is no ranking system for papermaking additives, and the field itself is broad, encompassing numerous types such as biocides, bleaching aids, defoamers, and preservatives.

As a primary manufacturer of papermaking additives, Kairui Chemical welcomes inquiries about our products. Please contact us directly for further information.

Shandong Kairui Chemistry Co.,Ltd.
Zaozhuang Kairui Water Treatment Co., Ltd.
TEL: +86-632-3671188
E-mail: [email protected]
ADD: No.1, Fuqian South Road, Xuecheng Chemical Industrial Park, Xuecheng District, Zaozhuang City, Shandong Province, China

HEDP has a wide range of applications covering several industrial fields:

Industrial circulating cooling water system: In electric power, chemical industry, metallurgy, fertilizer and other industries, HEDP acts as scale inhibitor and corrosion inhibitor, effectively preventing scale and corrosion problems and prolonging the service life of equipment.

Boiler and oilfield water injection: In medium and low pressure boiler and oilfield water injection systems, HEDP helps to reduce scale and corrosion and ensure efficient system operation.

Light Textile Industry: As a cleaning agent for metal and non-metal, HEDP can remove dirt and deposits on equipment and improve production efficiency.

Bleaching and dyeing industry: As a peroxide stabilizer and color-fixing agent, HEDP improves dyeing quality and stability during the bleaching and dyeing process.

Cyanide-free plating industry: as a complexing agent, HEDP stabilizes metal ions in the plating process and improves plating quality.

Electronics industry: as a cleaning agent, HEDP removes impurities from electronic components to ensure the performance and reliability of electronic equipment.

Daily chemicals: as chelating agent in detergents, to improve the washing effect.

HEDP is an organic compound, molecular formula is C2H8O7P2, molecular weight is 206.03, white crystalline particles, soluble in water as colorless to light yellow liquid. It is soluble in water, soluble in methanol and ethanol. It has a large dissociation constant in water and can generate stable complexes with metal ions. It can form stable adducts with compounds containing active oxygen to keep active oxygen stable. Low toxicity.
HEDP is a kind of organic phosphoric acid scale and corrosion inhibitor, can form stable complexes with iron, copper, zinc and other metal ions, and can dissolve metal surface oxides.HEDP can still play a good corrosion and scale inhibition at 250℃, and is still very stable at high pH, not easy to be hydrolyzed, and is not easy to be decomposed under general light and heat conditions. Acid and alkali resistance, resistance to chlorine oxidation performance is better than other organic phosphoric acid (salt).HEDP and metal ions in the water, especially calcium ions to form a hexacyclic chelate, so HEDP has a better scale inhibition effect and has a clear solubility limit effect, and when used in combination with other water treatment agents, it shows ideal synergistic effect.HEDP solid is a high purity product, suitable for winter cold areas; especially for the electronics industry cleaning agent and daily use chemicals. HEDP solids are high purity products, suitable for winter cold areas; especially suitable for cleaning agent of electronic industry and additives of daily-use chemicals.
Therefore, HEDP is mainly used as scale and corrosion inhibitor for boiler and heat exchanger, complexing agent for cyanide-free plating, chelating agent for soap, cleaning agent for metal and non-metal.