Hạt Dowex HCRS


Typical Physical and Chemical Properties

Physical Form

 

Amber translucent spherical beads

Matrix

 

Styrene-DVB, gel

Functional group

 

Sulfonic acid

Ionic form as shipped

 

Na+ form

H+ form

Total volume capacity, min.

eq/L  kgr/ft3 as CaCO3

2.0 43.7

1.8 39.3

Particle size

 

 

 

300–1,200 μm, min. (50 mesh–16 mesh)

%

90

90

Acidity range

pH

7.0–10.5

Color throw, as packaged, max.

APHA

20

Moisture retention capacity

%

44–48

50–56

Whole uncracked beads

%

90–100

90–100

Total swelling (Na+ → H+)

%

8

8

Particle density

g/mL

1.28

1.22

Shipping density**

g/L lbs/ft3

820 51

780 49

 

For additional particle size information, please refer to Particle Size Distribution Cross Reference Chart

(Form No. 177-01775). **As per the backwashed and settled density of the resin, determined by ASTM D-2187

Suggested Operating Conditions

Maximum operating temperature

120ºC (250ºF)

pH range

0–14

Bed depth, min.

800 mm (2.6 ft)

Flow rates:

 

Service/fast rinse

5–50 m/h (2–20 gpm/ft2)

Backwash

See figure 1

Co-current regeneration/displacement rinse

1–10 m/h (0.4–4 gpm/ft2)

Total rinse requirement

3–6 BV*

Regenerant

1–8% H2SO4, 4–8% HCl or 8–12% NaCl

 

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

Page 1 of 3 ®TM Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No. 177-02266-0411

Packaging 25 liter bags or 5 cubic feet fiber drums

Hydraulic Figure 1 shows the bed expansion of DOWEX™ HCR-S resin as a function of backwash

Characteristics flow rate and water temperature. Figure 2 shows the pressure drop data for DOWEX HCR-S as a function of service flow rate and water temperature. Pressure drop data are valid at the start of the service run with clear water and a correctly classified bed.

Figure 1. Backwash Expansion Data Figure 2. Pressure Drop Data