Chemical and petrochemical
Brine Treatment with Lewatit® MDS TP Grade Resins
Our chelating resins make brine treatment by chloralkali electrolysis more efficient and reliable. By better protecting the membranes they significantly save costs. They addition ally provide an excellent solution to meet tighter require ments on waste reduction, finally resulting in waste and discharge cost savings. Two case studies are published allowing insights into the industrial plant operation of Lewatit® MDS TP 208 used for improvement of NaCl brine quality, extended operating cycle times, and wastewater reduction.
Steam is an important energy carrier in the chemical and petrochemical industries. Ion exchangers protect the infra structure of boilers, pipelines, and heat exchangers against scale formation and corrosion. Similar to steam, process water is also required and must conform to certain specifi cations. Lewatit® ion exchangers are used to soften or dem ineralize the process water and can be combined with each other with beneficial effect. Another application for Lewatit® ion exchangers is selective adsorption of carbon dioxide, a greenhouse gas, from flue gas or the air.
Basic chemicals such as sodium hydroxide, chlorine gas, and hydrogen gas are needed in the production of materials and liquids such as PVC, paper, cellulose, disinfectants, bleach, and aluminum compounds. These are obtained from chlor alkali electrolysis of sodium chloride brine, which is purified by Lewatit® TP resins to exclude, e.g., alkaline earth metals by using ion exchangers. Other process solutions, such as pickling acids, rinse, water, and electroplating baths, can be treated in a similar way.
Ion exchangers are firmly established in the chemical industry as versatile and efficient catalysts. They are used, for instance, in acid–catalyzed ester/ether synthesis and con densation reactions, such as in the production of bisphenol A.
Chelating Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. (H Form) | Volume Change (%) max. | Water | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit®MDS TP 208 | Styrene/DVB macroporous | Na+ | MD: 0.38 (+/– 0.04) | 2.8 | –35 (Na+→H+) | 59–65 | Hardness removal from brines |
| Lewatit®MDS TP 260 | Styrene/DVB macroporous | Na+ | MD: 0.40 (+/– 0.04) | 3.0 | –35 (Na+→H+) | 63 | Hardness removal from brines |
| Lewatit® MonoPlus TP 208 | Styrene/DVB macroporous | Na+ | MD: 0.65 (+/– 0.05) | 2.5 | –30 (Na+→H+) | 58–64 | Hardness removal from brines |
| Lewatit® MonoPlus TP 214 | Styrene/DVB macroporous | H+ | MD: 0.55 (+/– 0.05) | 110 g/l Ag capacity | – | 55–60 | Mercury removal from brines |
| Lewatit® MonoPlus TP 260 | Styrene/DVB macroporous | Na+ | MD: 0.63 (+/– 0.05) | 2.4 | –35 (Na+→H+) | 58–62 | Hardness removal from brines |
Strong Acidic Cation Exchange Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® GF 101 | Styrene/DVB macroporous | H+ | HD: 0.4–1.25 | 4.7 eq/kg (dry) | – | 58–63 | Biodiesel, FFA esterification |
| Lewatit® GF 202 | Styrene/DVB macroporous | Neutral | MD: 0.65 (+/– 0.05) | – | – | 52–57 | Biodiesel purification |
| Lewatit® K 1131 S | Styrene/DVB gel | H+ | HD: 0.8–1.25 | 0.7 | – | 77–82 | BPA production |
| Lewatit® K 1137 | Styrene/DVB gel | H+/promoted | HD: 0.8–1.25* | 0.7* | – | 77–82* | BPA production |
| Lewatit® K 1161 | Styrene/DVB gel | H+ | MD: 1.05 (+/– 0.15) | 0.7 | – | 75–80 | BPA production |
| Lewatit® K 1221 | Styrene/DVB gel | H+ | HD: 0.4–1.25 | 1.2 | – | 66–69 | BPA production |
| Lewatit® K 1267 | Styrene/DVB gel | H+/promoted | MD: 0.74 (+/– 0.07)* | 1.2* | – | 61–66* | BPA production |
| Lewatit® K 1461 black | Styrene/DVB gel | H+ | MD: 0.65 (+/– 0.06) | 1.8 | – | 45–55 | Esterification |
| Lewatit® K 2420 | Styrene/DVB macroporous | H+ | HD: 0.5–1.6 | 1.4 | – | 62–67 | Phenol purification |
| Lewatit® K 2431 | Styrene/DVB macroporous | H+ | HD: 0.5–1.6 | 1.2 | – | 63–68 | Phenol purification, esterification |
| Lewatit® K 2440 | Styrene/DVB macroporous | H+ | HD: 0.4–1.6 | 5.4 eq/kg (dry) | – | – | Phenol alkylation |
| Lewatit® K 2620 | Styrene/DVB macroporous | H+ | HD: 0.4–1.25 | 1.9 | – | 50–55 | Etherification, esterification |
| Lewatit® K 2621 | Styrene/DVB macroporous | H+ | HD: 0.4–1.25 | 1.4 | – | 57–63 | Etherification, esterification, hydrolysis |
| Lewatit® K 2624 | Styrene/DVB macroporous | H+/Pd | HD: 0.4–1.25 | 1.4 | – | 57–63 | Isomerization, hydro genation, etherification |
| Lewatit® K 2629 | Styrene/DVB macroporous | H+ | HD: 0.4–1.25 | 1.7 | – | 50–55 | Etherification, esterification |
| Lewatit® K 2649 | Styrene/DVB macroporous | H+ | HD: 0.4–1.25 | 4.7 eq/kg (dry) | – | – | Phenol alkylation |
* Value of the unpromoted precursor
Strong Base Anion Exchange Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® K 7333 | Styrene/DVB gel | OH-/Pd | MD: 0.64 (+/– 0.05) | – | – | 58–63 | Deoxygenation |
| Lewatit® S 6368 A | Styrene/DVB macroporous | Cl | MD: 0.62 (+/– 0.05) | 1.0 | 22 (Cl→OH-) | 60–65 | Iodide removal from sodium chloride brines |
Weak Base Anion Exchange Resins
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® K 3433 | Styrene/DVB macroporous | FB/Pd | HD: 0.4–1.25 | – | – | 51–56 | Deoxygenation |
| Lewatit® MP 62 WS | Styrene/DVB macroporous | FB | HD: 0.4–1.25 | 1.7 | 45 (FB→Cl) | 50–55 | Acid removal |
| Lewatit® MP 62 WS Eco | Styrene/DVB macroporous | FB | HD: 0.4–1.25 | 1.7 | 45 (FB→Cl) | 50–55 | Acid removal |
| Lewatit® MP 62 WS Dried | Styrene/DVB macroporous | FB | HD: 0.4–1.25 (wet) | 1.7 (wet) | – | < 0.5 (residual moisture) | Production of highpurity silicon |
| Lewatit® VP OC 1065 | Styrene/DVB macroporous | FB | HD: 0.3–1.25 | 2.1 | – | 47–55 | CO2/COS capture, aldehyde removal |
Adsorber and Carrier
| Product | Product Matrix | Ionic Form | Bead Size (mm): Monodisperse: (MD, mean value) Heterodisperse: (HD, share > 90%) | Total Capacity (eq/l) min. | Volume Change (%) max. | Water Retention (%) | Applications |
|---|---|---|---|---|---|---|---|
| Lewatit® GF 808 | Acrylic | | HD: 0.315–1.0 | – | – | 55–60 | Biodiesel, enzyme carrier |
Check out full information in Brochure Lewatit Product Guide 2025
