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Strongly Basic Anion Exchange Resins

Strongly Basic Anion Exchange Resins

Fig3 and Fig4 show the resins with quaternary ammonium groups as their functional group, such resins dissociate and show as strong basicity as inorganic bases like NaOH or KOH. Accordingly, they are called strong basic anion exchange resins. DIAION SA, PA, and HPA series belong to this classification.

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DIAION™ strong base anion exchange resins are based on crosslinked polystyrene matrix having quaternary ammonium groups (NR3+). Among DIAION™ product line, there are SA-grades of gel-type. PA-grades of porous-type, and HPA-grades of highly porous-type. The standard shipping form is Cl form. (in some cases OH form is available).

Type I resins have trimethyl ammonium groups which impart higher basicity. In the co-current regeneration mode, the treated water will have the lowest silica leakage. Type I resins also have higher chemical stability and can be applied at higher temperatures (than Type II or acrylic-based resins).

Type II resins have dimethylethanolamine groups which impart slightly lower basicity. This provides an advantage of easier regeneration (than Type I) and slightly higher capacity.

Gel Type DIAION™ SA10 Series (Type I) and SA20 Series (Type II)

SA10A is a Type I resin with standard cross-linkage. SA12A is also a Type I resin with slightly lower cross-linkage. These resins are popularly used for water treatment. SA12A is typically recommended for the treatment of surface waters with troublesome organic content.

SA11A is Type I resin with low cross-linkage and is mainly used for special applications such as sometimes used as a mixed bed or primary bed polisher anion.

SA20A is Type II resin of standard cross-linkage. It is popularly used for water treatment with its easy.

Grade Name DIAIONTM
SA10A
DIAIONTM
SA11A
DIAIONTM
SA12A
DIAIONTM
SA20A
Type Type I Type Ⅱ
Chemical Structure
Ionic Form As Shipped Cl-form
Whole Bead Count 90 min.
Shipping Density
(g/L: approx.)
670 685 670 715
Salt Spliting Capacity
(meq/mL-R)
1.3 min 0.85 min 1.3 min 1.3 min
Water Content
(%)
43 – 47 55 – 65 48 – 55 45 – 52
Particle Size Distribution
on 1180 μm (%)
through 300 μm (%)
5 max.
1 max.
Effective Size (mm) 0.40 min.
Uniformity Coefficient 1.6 max.
Operating Temperature (℃) 60 (OH-form) max.
80 (Cl-form) max.
40 (OH-form) max.
60 (Cl-form) max.

Porous-Type DIAION™ PA300 Series (Type I)

Porous-type ion-exchange resins of porous polymer matrix have good resistance against swelling and shrinking, though their exchange capacity is lower than gel-type ion exchange resins of the same degree of cross-linkage. These are effective when highly purified effluents are needed, e.g. removal of silica to very low concentration.

They are suitable for treatments of wastewaters with organic compounds. PA312 and PA316 are generally used in wastewater treatments, and PA308 is used for demineralization and decolorization of sugar liquors.

Highly Porous-Type DIAION™ HPA25L (Type I)

Highly porous type resin, HPA25L, has higher cross-linkage and higher porous properties than standard PA grade resins. This is typically used for the treatment of large molecules in special process applications. They are mainly applied in enzyme purification as enzyme carriers for the treatment of bio-pharmaceutical substances, and treatment of feed solutions of high color value.

Grade Name DIAIONTM
PA308
DIAIONTM
PA312
DIAIONTM
PA316
DIAIONTM
HPA25L
Type Type I
Chemical Structure
Ionic Form As Shipped Cl-form
Whole Bead Count 95 min.
Shipping Density
(g/L: approx.)
710 675 670 675
Salt Spliting Capacity
(meq/mL-R)
1.0 min 1.2 min 1.3 min 0.5 min
Water Content
(%)
57 – 67 49 – 55 44 – 50 58 – 68
Particle Size Distribution
on 1180 μm (%)
through 300 μm (%)
5 max.
1 max.
on 300μm
5 % min
Effective Size (mm) 0.40 min. 0.25 min
Uniformity Coefficient 1.6 max.
Operating Temperature (℃) 60 (OH-form) max.
80 (Cl-form) max.
Crosslinkage (%) Ca. 4 Ca. 6 Ca. 8

Porous Type DIAION™ PA400 Series (Type II)

Type II has better efficiency to be regenerated though it has lower basicity and chemical stability than Type I. PA418 is generally used in water treatment.

PA408 is used to demineralize and to decolorize sugar liquors.

Grade Name DIAIONTM
PA408
DIAIONTM
PA412
DIAIONTM
PA418
Type Type Ⅱ
Chemical Structure
Ionic Form As Shipped Cl-form
Whole Bead Count 95 min.
Shipping Density
(g/L: approx.)
720 685 685
Salt Spliting Capacity
(meq/mL-R)
0.9 min 1.1 min 1.3 min
Water Content
(%)
54 – 64 46 – 52 38 – 44
Particle Size Distribution
on 1180 μm (%)
through 300 μm (%)
5 max.
1 max.
Effective Size (mm) 0.40 min.
Uniformity Coefficient 1.6 max.
Operating Temperature (℃) 40 (OH-form) max.
60 (Cl-form) max.
Crosslinkage (%) Ca. 4 Ca. 6 Ca. 9

Gel Type DIAION™ UBA Series

Ion exchange resins with good uniformity in particle size increase their necessity to reduce the reagents costs and spent wastewaters in manufacturing pure waters. They are also used in other fields because they have a small number of large particles easy to be broken by swelling and shrinkage. Gel type ion-exchange resins of uniform particle size are now launched to meet such necessity.

Grade Name DIAIONTM
UBA100
DIAIONTM
UBA120
DIAIONTM
UBA200
Type Type Ⅰ Type Ⅱ
Chemical Structure
Ionic Form As Shipped Cl-form
Whole Bead Count 90 min. 95 min. 90 min.
Shipping Density
(g/L: approx.)
680 675 715
Salt-splitting Capacity
(meq/mL-R)
1.35 min 1.3 min
Water Content
(%)
43 – 49 49 – 55 45 – 51
Average Diameter (μm) 550 ± 50 575 ± 50 575 ± 50
Uniformity Coefficient 1.1 max.
Operating Temperature (℃) 60 max. (OH-form)
80 max. (Cl-form)
40 max. (OH-form)
60 max. (Cl-form)