DuPont Ion Exchange Resin

DuPont ion exchange resins are copolymer with microporous structures of styrene-divinylbenzene copolymer, and produced by controlling the particle size by the suspension polymerization method. The features of DuPont ion exchange resin are [1] it can withstand oxidation, reduction, mechanical wear and breakage, [2] it shows more reliable and reproducible performance than crushed resin, and [3] the particle size and the degree of cross-linking (or water content) are controlled.

DuPont ion exchange resin has different performance depending on the combination of resin type (cation or anion), degree of cross-linking (rate of divinylbenzene), and mesh size, so please use it according to your application.

There are three types of ion exchange resin as follows.
50W: Strongly acidic cation exchange resin
1: Strongly basic anion exchange resin, type I
2: Strongly basic anion exchange resin, type II

The product name has changed due to the shift of Dow ion exchange resin business to DuPont. The comparison table is as follows. The only change is the product name, the quality and performance are same as the corresponding Dow product.

Strongly Acidic Cation Exchange Resin

Code No.	Volume	Dow Ion Exchange Resin (without trademark)	Code No.	Product Name
322-97561	100 mL	50Wx2 50-100 Mesh (H) Cation Exchange Resin	353-45621	Strong Acidic Cation Exchange Resin No.1 (2% Cross-linking, 50-100 Mesh, H Type)
324-97565	500 mL		355-45625
325-97551	100 mL	50Wx2 100-200 Mesh (H) Cation Exchange Resin	351-45661	Strong Acidic Cation Exchange Resin No.2 (2% Cross-linking, 100-200 Mesh, H Type)
327-97555	500 mL		353-45665
356-27271	100 mL	50Wx4 50-100 Mesh (H) Cation Exchange Resin	350-46231	Strong Acidic Cation Exchange Resin No.8 (4% Cross-linking, 50-100 Mesh, H Type)
358-27275	500 mL		352-46235
329-97571	100 mL	50Wx4 100-200 Mesh (H) Cation Exchange Resin	358-45671	Strong Acidic Cation Exchange Resin No.3 (4% Cross-linking, 100-200 Mesh, H Type)
321-97575	500 mL		350-45675
323-97591	100 mL	50Wx8 50-100 Mesh (H) Cation Exchange Resin	355-45681	Strong Acidic Cation Exchange Resin No.4 (8% Cross-linking, 50-100 Mesh, H Type)
325-97595	500 mL		357-45685
328-97541	100 mL	50Wx8 100-200 Mesh (H) Cation Exchange Resin	352-45691	Strong Acidic Cation Exchange Resin No.5 (8% Cross-linking, 100-200 Mesh, H Type)
320-97545	500 mL		354-45695
326-97581	100 mL	50Wx8 200-400 Mesh (H) Cation Exchange Resin	355-45701	Strong Acidic Cation Exchange Resin No.6 (8% Cross-linking, 200-400 Mesh, H Type)
328-97585	500 mL		357-45705
354-14381	100 mL	650C (H) Cation Exchange Resin	352-45711	Strong Acidic Cation Exchange Resin No.7 (H Type)
350-14383	1000 mL		358-45713

Strongly Basic Anion Exchange Resin

Code No.	Volume	Dow Ion Exchange Resin (without trademark)	Code No.	New Product Name
323-97471	100 mL	1x2 50-100 Mesh Anion Exchange Resin	359-45721	Strong Basic Anion Exchange Resin No.1 (2% Cross-linking, 50-100 Mesh, Cl Type)
325-97475	500 mL		351-45725
326-97461	100 mL	1x2 100-200 Mesh Anion Exchange Resin	356-45731	Strong Basic Anion Exchange Resin No.2 (2% Cross-linking, 100-200 Mesh, Cl Type)
328-97465	500 mL		358-45735
327-97511	100 mL	1x4 50-100 Mesh Anion Exchange Resin	353-45741	Strong Basic Anion Exchange Resin No.3 (4% Cross-linking, 50-100 Mesh, Cl Type)
329-97515	500 mL		355-45745
320-97501	100 mL	1x4 100-200 Mesh Anion Exchange Resin	350-45751	Strong Basic Anion Exchange Resin No.4 (4% Cross-linking, 100-200 Mesh, Cl Type)
322-97505	500 mL		352-45755
324-97521	100 mL	1x8 50-100 Mesh Anion Exchange Resin	357-45761	Strong Basic Anion Exchange Resin No.5 (8% Cross-linking, 50-100 Mesh, Cl Type)
326-97525	500 mL		359-45765
327-97491	100 mL	1x8 100-200 Mesh Anion Exchange Resin	354-45771	Strong Basic Anion Exchange Resin No.6 (8% Cross-linking, 100-200 Mesh, Cl Type)
329-97495	500 mL		356-45775
321-97531	100 mL	1x8 200-400 Mesh Anion Exchange Resin	351-45781	Strong Basic Anion Exchange Resin No.7 (8% Cross-linking, 200-400 Mesh, Cl Type)
323-97535	500 mL		353-45785
355-14431	100 mL	550A (OH) Anion Exchange Resin	358-45791	Strong Basic Anion Exchange Resin No.8 (OH Type)
351-14433	1000 mL		354-45793

Strongly Acidic Cation Exchange Resin (functional group: Sulfonic acid)

Code No.	Volume	Resins	Degree of Cross-Linking (%)	Mesh Size	Ionic Form	Water Retention Capacity (%)	Total Exchange Capacity (meq/mL)	Durable Temperature (℃)
353-45621	100 mL	No.1 (50Wx2)	2	50-100	H+	74-82	0.6	150
355-45625	500 mL
351-45661	100 mL	No.2 (50Wx2)	2	100-200	H+	74-82	0.6	150
353-45665	500 mL
350-46231	100 mL	No.8 (50Wx4)	4	50-100	H+	64-72	1.1	150
352-46235	500 mL
358-45671	100 mL	No.3 (50Wx4)	4	100-200	H+	64-72	1.1	150
350-45675	500 mL
355-45681	100 mL	No.4 (50Wx8)	8	50-100	H+	50-56	1.7	150
357-45685	500 mL
352-45691	100 mL	No.5 (50Wx8)	8	100-200	H+	50-58	1.7	150
354-45695	500 mL
355-45701	100 mL	No.6 (50Wx8)	8	200-400	H+	50-58	1.7	150
357-45705	500 mL
352-45711	100 mL	No.7 (650C)	-	650±50 μm	H+	46-51	2.0	130
358-45713	1000 mL

Strongly Basic Anion Exchange Resin Type I (functional group: Benzyltrimethyl ammonium)

Code No.	Volume	Resins	Degree of Cross-Linking (%)	Mesh Size	Ionic Form	Water Retention Capacity (%)	Total Exchange Capacity (meq/mL)	Durable Temperature (℃)
359-45721	100 mL	No.1 (1x2)	2	50-100	Cl-	65-75	0.7	100
351-45725	500 mL
356-45731	100 mL	No.2 (1x2)	2	100-200	Cl-	70-80	0.6	100
358-45735	500 mL
353-45741	100 mL	No.3 (1x4)	4	50-100	Cl-	50 min.	1.0	100
355-45745	500 mL
350-45751	100 mL	No.4 (1x4)	4	100-200	Cl-	55-63	1.0	100
352-45755	500 mL
357-45761	100 mL	No.5 (1x8)	8	50-100	Cl-	43-48	1.2	100
359-45765	500 mL
354-45771	100 mL	No.6 (1x8)	8	100-200	Cl-	39-45	1.2	100
356-45775	500 mL
351-45781	100 mL	No.7 (1x8)	8	200-400	Cl-	39-45	1.2	100
353-45785	500 mL
358-45791	100 mL	No.8 (550A)	-	590±50 μm	OH-	55-66	1.1	60
354-45793	1000 mL

Q1. What storage method is recommended?

Store indoors in a cool, dark room at room temperature (0-30°C), avoiding high temperature and high humidity.

Q2. How do I handle the ion exchange resin?

In normal use, the resin is soaked in pure water overnight. If you want to convert the ion form of the purchased ion exchange resin to another ion form, you can convert the ion form by using a chemical solution containing the ion you want to convert. For example, if you want to convert H-type cation exchange resin to Na-type, you can convert it to Na-type by dipping and rinsing by 1N NaCl. In the purification of organic solvents, the resin may be dried before use. The drying temperature must not exceed the applicable temperature of the resin (see the physical characteristics table for the durable temperature).

Q3. What precautions should be taken when using ion exchange resin?

When in contact with strong oxidizing agents such as nitric acid, ion exchange resins are immediately oxidized, which can cause explosive reactions under some conditions. Wear safety glasses to protect your eyes and face. In case of contact with eyes, wash eyes with plenty of water. If spilled on the floor, it is a dangerous slippery. Wipe off immediately. Please refer to SDS for details.

Q4. How to convert the ion form of the ion exchange resin?

Strongly acidic cation exchange resin

• Type H to Na： Pack the ion exchange resin in a column and pass 2 - 4 BV* of 0.5 - 2.0% sodium chloride aqueous solution or sodium hydroxide aqueous solution. At this time, the contact time of the solution should be at least 15 minutes (the acidic or neutral solution flows out while the ionic form is being converted).
• Type H to K： Pass 3 - 4.5 BV* of 0.5 M ( - 3 wt%) potassium hydroxide aqueous solution.
• Type Na to H： Pass 5 - 6 BV* of 5 - 8% aqueous hydrochloric acid solution and wash with pure water until the extract is near neutral.

Strongly basic anion exchange resin

• Type Cl to OH： Pack the ion exchange resin in a column and pass 5 - 10 BV* of 4% aqueous sodium hydroxide solution. At this time, allow the liquid to pass slowly so that the contact time of the liquid is at least 1 hour. Then wash with pure water until the extract is almost neutral.

Weakly basic anion exchange resin

• Type Cl to OH： Pack the ion exchange resin in a column and pass and allow 2 - 4 BV* of 4% aqueous sodium hydroxide solution. At this time, allow the liquid to pass slowly so that the contact time of the liquid is at least 30 minutes. Then wash with pure water until the extract is almost neutral.

* BV (Bed Volume): The volume of the filled ion exchange resin is 1 BV.

Q5. How to regenerate the ion exchange resin?

The type and concentration of the chemical solution used depends on the resin to be regenerated. The chemical solutions and concentrations commonly used for regeneration are:

• Strongly acidic cation exchange resin: 3 - 8% hydrochloric acid aqueous solution or sulfuric acid aqueous solution
• Strongly basic anion exchange resin: 3 - 8% aqueous sodium hydroxide solution
• Weakly basic anion exchange resin: 0.5 - 5% aqueous sodium hydroxide solution

The standard contact time of the chemical solution is about 30 minutes for the strongly acidic cation exchange resin and about 45 minutes for the strongly basic anion exchange resin.
However, there is no guarantee that this method will return 100% of the product to the condition it was in when it was delivered. It is common to control how much resin can be regenerated with respect to the chemical solution used.