Chemi Tech Alkali-Resistant Defoamer: A Breakthrough Solution for Foam Control in Strong Alkaline Systems

In industrial processes such as alkaline cleaning, textile dyeing and printing, pulp and paper manufacturing, and metalworking, foam generated in strong alkaline environments often leads to reduced production efficiency, accelerated equipment corrosion, and inconsistent product quality. Conventional defoamers tend to fail in systems with pH above 12, exhibiting issues like demulsification, oil separation, or short suppression time, which not only increases operational costs but also risks secondary contamination. 

Chemi Tech alkali-resistant defoamer was developed to address this exact pain point. It features a specially modified polysiloxane combined with hydrophobic particle composite structure, ensuring stable dispersion even in highly caustic media such as sodium hydroxide or potassium hydroxide. Its core advantages include: rapid surface tension reduction for instant foam knockdown even at pH levels of 13-14, and extended suppression time through cross-linked molecular networks, reducing the need for frequent re-dosing. 

To solve common instability problems in practical applications, Chemi Tech proposes a three-step implementation method: 

Step 1: Evaluate the system. Measure the actual pH, temperature, and foam intensity of the production line. For instance, if foam height in an alkaline cleaning tank exceeds 10 cm and persists for more than 5 minutes without collapsing, the current defoamer has likely failed. 

Step 2: Determine dosing method and dosage. Continuous drip feeding or batch addition is recommended, with an initial dosage of 0.05% to 0.2% by total system weight. Adjust the dosage based on foam decay speed until the foam layer is controlled below 1 cm. 

Step 3: Monitor and optimize. After 2-4 hours of operation, check for defoamer layering or sedimentation. If suppression time is shorter than 30 minutes, consider increasing the hydrophobic particle ratio or switching to a higher concentration grade. 

A metal surface treatment company once faced a tough challenge: its degreasing bath maintained a pH of 13.5, and the original defoamer failed completely within 40 minutes of startup, causing foam overflow to contaminate the floor, requiring three dosing rounds per shift. After introducing Chemi Tech alkali-resistant defoamer, a single initial dose of 0.15% kept the foam layer below 0.5 cm throughout the 8-hour production run, with no need for re-dosing. Defoamer consumption per shift was reduced by 67%, and equipment downtime caused by foam overflow was eliminated. 

In another case, a textile dyeing plant dealing with high-concentration caustic soda scouring processes experienced foam-induced fabric folding unevenness and frequent dye spots. After switching to Chemi Tech product, foam was completely eliminated within 20 seconds, suppression lasted over 6 hours, and the final product pass rate increased by 12%. 

Choosing Chemi Tech alkali-resistant defoamer means saying goodbye to frequent re-dosing, equipment contamination, and performance fluctuations. We offer comprehensive technical support from lab-scale trials to workshop pilot runs, ensuring that each step meets the desired outcome.