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Dow Dowex fine spherical ion exchange resin
Dow Dowex fine spherical ion exchange resin Dowex fine resin adopts the selective controlled suspension polymerization technology used in Dow production standard 16-50 mesh industrial resin. The resin produced by this technology is more complete and uniform, with the highest level of selectivity, consistency and reliability. Therefore, it can provide excellent dynamic performance and filling performance in chromatographic separation, without problems of abrasive resin or granular resin. By controlling the suspension polymerization manufacturing process, the particle size of Dowex fine resin can be strictly controlled, so as to avoid dust easily generated due to ultrafine particles when processing dry resin, and to avoid the physical loss and resin loss caused by the fine particles blocking the sieve plate or filter and prolonging the loading time of batch processing when used as chromatography medium or filter aid.
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Product characteristics

Dowex series of ion exchange chromatography separation resins are divided into two categories: strong acid cation exchange resin and strong basic anion exchange resin. Each category is divided into three categories according to the different degree of crosslinking (DVB%). Each category is represented by "× 2", "× 4" and "× 8". On this basis, three particle size ranges are provided, namely 150-300 μ m (50-100 mesh) and 75-150 μ m (100 mesh) -200 mesh) and 35-75 μ m (200-400 mesh), a total of 18 resin brands. Obviously, the resin with different crosslinking degrees has different water content, volume exchange capacity and material diffusion resistance. Such a wide range of products enriches the trial selection of customers, and suitable chromatographic separation resin can be selected for specific application.

The framework materials of Dowex series ion exchange chromatographic separation resins are all styrene divinylbenzene, which are prepared on a large scale by special suspension polymerization process and have good chemical and physical stability. Easy packed column, small diffusion resistance of target components, stable product quality. Therefore, Dowex series ion exchange chromatography separation resin can not only meet the small-scale test process development of laboratory food, medicine and other fine chemical products, but also make the process amplification easier.

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Model

Particle size (mesh)

Ionic type

water content（%）

Total switching capacity（meq/ml）

DOWEX 50W×2

50-100

H+

74-82

0.6

DOWEX 50W×2

100-200

H+

74-82

0.6

DOWEX 50W×2

200-400

H+

74-82

0.6

DOWEX 50W×4

50-100

H+

64-72

1.1

DOWEX 50W×4

100-200

H+

64-72

1.1

DOWEX 50W×4

200-400

H+

64-72

1.1

DOWEX 50W×8

50-100

H+

50-56

1.7

DOWEX 50W×8

100-200

H+

50-58

1.7

DOWEX 50W×8

200-400

H+

50-58

1.7

DOWEX 1×2

50-100

Cl-

65-75

0.7

DOWEX 1×2

100-200

Cl-

70-80

0.6

DOWEX 1×2

200-400

Cl-

70-80

0.6

DOWEX 1×4

50-100

Cl-

50 min.

1.0

DOWEX 1×4

100-200

Cl-

55-63

1.0

DOWEX 1×4

200-400

Cl-

55-63

1.0

DOWEX 1×8

50-100

Cl-

43-48

1.2

DOWEX 1×8

100-200

Cl-

39-45

1.2

DOWEX 1×8

200-400

Cl-

39-45

1.2


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