Product Data Sheet

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DOWEX MARATHON™ 1200 Ion Exchange Resin

Uniform Particle Size, Strong Acid Cation Exchange Resin for Industrial Demineralization
Applications

Description DOWEX MARATHON™ 1200 Ion Exchange Resin is designed for water
utility operators and power plant chemists who are concerned with
achieving maximum water and chemical efficiency. The chemical
properties and particle size of the resin have been optimized to help yield
excellent operating capacity and rinse characteristics, reducing chemical
regenerant and rinse water usage while maintaining a superior physical stability that users
of DOWEX MARATHON™ Resins have come to know through more than 25 years of
successful operation. This allows users to simultaneously minimize operating costs and
environmental impacts while also preserving precious raw water resources.

While the benefits of DOWEX MARATHON 1200 can be realized in standard co-flow
regenerated systems, it is ideal when used in counter-current regenerated systems and
packed beds such as the AMBERPACK™ and UPCORE™ Ion Exchange Systems.
Additionally, DOWEX MARATHON 1200 H can be used in regenerable polishing mixed
beds when combined with DOWEX MARATHON 4200 OH, allowing users to inventory only
one strong acid cation resin for their demineralization needs.

Typical Physical Matrix Styrene-divinylbenzene, gel

and Chemical Type Strong acid cation
Properties** Functional Group Sulfonic acid
Physical Form Dark brown, translucent, spherical beads
+ +
Ionic Form as Shipped H Form Na Form
Total Exchange Capacity ≥ 1.8 eq/L ≥ 2.0 eq/L
Water Retention Capacity 50 – 56% 43 – 50%
Particle Size
600  50 µm 585  50 µm
b
Particle Diameter
Uniformity Coefficient ≤ 1.1 ≤ 1.1
< 300 µm ≤ 0.1% ≤ 0.1%
Whole Uncracked Beads ≥ 95% ≥ 95%
+ + + +
Swelling Na → H : 8% Na → H : 8%
c
Bulk Density, as Shipped 785 g/L 820 g/L
b
For additional particle size information, please refer to the Particle Size Distribution Cross Reference Chart
(Form No. 177-01775).
c
As per the backwashed and settled density of the resin, determined by ASTM D-2187.

Page 1 of 3 ®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No. 177-03561, Rev. 1
November 2016
Suggested Maximum Operating Temperature 120°C (248°F)
Operating pH Range 0 – 14
Conditions** Bed Depth, min. 800 mm (2.6 ft.)
Flowrates
Service 5 – 50 BV*/h (1 – 6 gpm/ft3)
Backwash See Figure 1
Regeneration
Chemical Injection
HCl 2 – 5 BV/h (0.5 – 1 gpm/ft3)
H2SO4 2 – 20 BV/h (0.5 – 4 gpm/ft3)
Displacement Rinse 2 – 5 BV/h (0.5 – 1 gpm/ft3)
Fast Rinse 5 – 50 BV/h (1 – 6 gpm/ft3)
Total Rinse Requirement 2 – 5 BV
Regenerant H2SO4 HCl NaCl
Concentration 1 – 8% 4 – 8% 8 – 12%

* 1 BV (Bed Volume) = 1 m3 solution per m3 resin or 7.5 gal per ft3 resin

Hydraulic Bed expansion of DOWEX MARATHON™ 1200 Ion Exchange Resin as a function of
Characteristics backwash flowrate at 25°C (77°F) is shown in Figure 1. The flowrate necessary to achieve a
desired bed expansion for other water temperatures can be calculated with the provided
equations.

Pressure drop data for DOWEX MARATHON 1200 as a function of service flowrate at 20°C
(68°F) is shown in Figure 2. The pressure drop for other water temperatures can be
calculated with the provided equations. Pressure drop data are valid at the start of the
service run with clean water.

Figure 1: Backwash Expansion Figure 2: Pressure Drop

Temperature = 25°C (77°F) Temperature = 20°C (68°F)

For other temperatures use: For other temperatures use:

FT = F25°C [1 + 0.008 (1.8T°C − 45)], where F ≡ m/h PT = P20°C / (0.026 TºC + 0.48), where P ≡ bar/m
FT = F77°F [1 + 0.008 (T°F − 77)], where F ≡ gpm/ft2 PT = P68°F / (0.014 TºF + 0.05), where P ≡ psi/ft

Page 2 of 3 ®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No. 177-03561, Rev. 1
November 2016
 Product Dow has a fundamental concern for all who make, distribute, and use its products, and for the
Stewardship environment in which we live. This concern is the basis for our product stewardship philosophy by
which we assess the safety, health, and environmental information on our products and then take
appropriate steps to protect employee and public health and our environment. The success of our
product stewardship program rests with each and every individual involved with Dow products—from
the initial concept and research, to manufacture, use, sale, disposal, and recycle of each product.

Customer Notice Dow strongly encourages its customers to review both their manufacturing processes and their
applications of Dow products from the standpoint of human health and environmental quality to ensure
that Dow products are not used in ways for which they are not intended or tested. Dow personnel are
available to answer your questions and to provide reasonable technical support. Dow product
literature, including safety data sheets, should be consulted prior to use of Dow products. Current
safety data sheets are available from Dow.

WARNING: Oxidizing agents such as nitric acid attack organic ion exchange resins under certain conditions. This could lead to

Lenntech anything from slight resin degradation to a violent exothermic reaction (explosion). Before using strong oxidizing agents, consult
sources knowledgeable in handling such materials.

NOTICE: No freedom from infringement of any patent owned by Dow or others is to be inferred. Because use conditions and
info@lenntech.com applicable laws may differ from one location to another and may change with time, Customer is responsible for determining
www.lenntech.com whether products and the information in this document are appropriate for Customer's use and for ensuring that Customer's
workplace and disposal practices are in compliance with applicable laws and other government enactments. The product shown
Tel.+31-152-610-900 in this literature may not be available for sale and/or available in all geographies where Dow is represented. The claims made
may not have been approved for use in all countries. Dow assumes no obligation or liability for the information in this document.
Fax+31-152-616-289 References to “Dow” or the “Company” mean the Dow legal entity selling the products to Customer unless otherwise expressly
noted. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.

**Allinformation set forth herein is for informational purposes only. This information is general information and may differ from
that based on actual conditions. Please note that physical properties may vary depending on certain conditions and while
operating conditions stated in this document are intended to lengthen product lifespan and/or improve product performance, it
will ultimately depend on actual circumstances and is in no event a guarantee of achieving any specific results. Nothing in this
document should be treated as a warranty by Dow.

Page 3 of 3 ®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No. 177-03561, Rev. 1
November 2016