AcidRecovery.com

An Overview

Mech-Chem Associates, Inc.’s Acid Purification Systems are simple to operate, dependable, and economical. Our purification systems use an advanced membrane separation technology known as Diffusion Dialysis to separate, recover, and purify strong acids from spent acid solutions contaminated with dissolved metals. An anion exchange membrane serves as a semi-permeable barrier between a flowing stream of water and a flowing stream of process acid. Through this membrane, the processes of both Diffusion and Dialysis occur. These processes are carried out hundreds of times through the numerous internal channels that are contained in the many layers that make up the centrally-located stack of the Acid Purification System.

This technology is capable of recovering acids from concentrated baths that would have been discarded in the past. The purified acid is returned to the process tank for continued use, while a concentrated metal-containing aqueous solution is removed for waste treatment. Typically, 80-90% of the initial process acid is recovered in one pass through the system with 70-90% removal of the dissolved metals from the process acid.

The Acid Purification Systems manufactured by Mech-Chem Associates, Inc. are tailored to the client’s needs with respect to materials of construction and operating capacity required. The systems range in size from the AP-15, which processes 15 gallons of acid per day, to the AP-1200, which processes up to 1,200 gallons of acid per day.

Advantages of Acid Recycling

• Up to 90% reduction in new acid purchases
• Increase acid bath life / Decrease neutralization costs
• Maintain bath uniformity for optimum performance

• Increase production / reduce downtime
• Reduce hazardous waste disposal costs
• Reduce waste neutralization costs
• Reduce long-term liability
• Simple, reliable, economical
• Units are self-contained, easily maintained, and require very little floor space

Acid Purification System Lab Unit

This Acid Purification Lab unit is designed for testing on small volumes of acid solutions, to provide users with an introduction to the technology, and with initial performance data. Evaluation of the results may lead to further pilot scale testing, or to full-scale installation at the facility.

Lab units are available for monthly rental, or may be purchased. The Lab units are designed to process between 1/2 to one gallons of acid solution, per 24 hours of operation, depending upon the type and concentrations of acids and dissolved metals in solution.

The Answer to Your Acid Concerns

If your facility is currently relying on the use of acids for production purposes, you are undoubtedly concerned with acid bath quality as well as the costs and liability associated with the disposal of spent acids each month. Not only are these issues related to production reliability, they are also of concern when it comes to production downtime and cost.

As a means to remedy these problems, Mech-Chem Associates, Inc. manufactures a line of built-to-order Acid Purification Systems that utilize the process of diffusion dialysis to remove dissolved metal impurities from acid solutions and produce clean, useable acid from what would have otherwise been waste.

Diffusion Dialysis for acid recycling has many benefits. It reduces acid purchases and eliminates or lowers neutralization or hazardous waste hauling costs and the related liability. Toxic chemical use is reduced and the required reporting and handling of hazardous materials and associated labor is greatly reduced. Consistent bath strength yields greater product uniformity and better quality with lower operating costs. Diffusion dialysis can dramatically improve a facility’s quality and economic performance.

For a more in-depth description of the technology and benefits of the Acid Purification Systems produced by Mech-Chem Associates, Inc., simply contact us. We will be more than happy to help you meet your acid purification needs.