Safe Chemical Solutions Since 1942




Rydlyme Container Sizes


RYDLYME is available in various sizes:
Tanker or other bulk sizes available upon request.
  • 1-gallon
  • 4-gallon Case (1 gal. container x 4)
  • 5-gallon Jug
  • 30-gallon Drum
  • 55-gallon Drum
  • 330-gallon Tote

Pulp and Paper mill descaler

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The buildup of water-formed mineral deposits with various types of water-cooled or operated equipment can result in varying degrees of problems. Often, the buildup of such deposits – calcium carbonate, iron oxides, even mud – can significantly reduce operational efficiency and lead to permanent equipment or system corrosion or failure.

With the large quantities of water used in the paper industry, deposit formations are often unavoidable, even with the purest water and state-of-the-art water treatment. Typical mill equipment in which buildup occurs are vacuum pumps. RYDLYME, a biodegradable descaling chemical, can rapidly dissolve damaging water-formed deposits into solution via a sample circulation process. By pumping the solution in at the seal water and out the top housing plug, the entire jacket may be cleaned. Circulation is continued via a centrifugal pump in addition to a circulation container for 2 hours, whether cleaning any one-size pump or multiple pumps in series. As the circulation of RYDLYME occurs, the deposits within are dissolved into solution, just as sugar into coffee, bringing the pump back to its original operating condition.



One way to maintain effective operation of vacuum pumps, without wear and tear, is periodic cleaning. All plants vary in cleaning schedules, but many, such as Smurfit Stone Container Corp.’s facility in Alton, IL, set up regular preventative maintenance programs for their vacuum pumps. By monitoring amperage on the pump motor, two pumps are scheduled for cleaning at each down, resulting in significant drop in amperage readings.

Avoiding costly downtime is a priority, but when deposits form rapidly and reduce or obstruct flow, there often is no other alternative. RYDLYME can be used within the mill from paper machines to digestors, evaporators and liquor lines.

The green liquor lines and recovery tank at the Tenneco Packaging Corp. facility in Tomahawk, WI, build up calcium carbonate deposits exponentially, reducing a 4’’ inner diameter line to 1’’ and brining transfer pumps on the system rated for 260 gal/min to 60 gal/min. Valves cannot be closed even manually. Piping has been replaced on the system at substantial expense, hydroblasting has been attempted, but RYDLYME provided a solution.

The facility implemented the solution into quarterly scheduled downtimes, added it to the dissolving tank, and circulated it throughout the pipelines with the inline transfer pumps. Circulation takes approximately 4 hours, and the system is spotless. RYDLYME is non-corrosive, so there is no loss of metallurgy with the system, and since the solution is biodegradable, the water makeup valves are simply turned on, and the solution is flushed to the normal plant sewer! Neutralization is not necessary, as RYDLYME is free-rinsing with water.

Manufactured by Apex Engineering Products Corporation, RYDLYME has been used in various industries for more than 75 years. It can be used in virtually any area of the mill, including the recovery area, wet end and on the generation side.

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Apex Engineering Products Corporation  |  1241 Shoreline Drive  |  Aurora, IL 60504  |  Tel: 800.451-6291 or 1.630.820.8888  |  Fax: 630.820.8886  |  Made in the U.S.A.

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