Scavenger resins are considered as polymers bound functional groups, which react with any specific kind of impurities, by-products or excess reagents that is produced in various reactions.
These kinds of polymer-bound functional groups will permit the application of different scavengers because the functional groups will be confined just within resin or will be simply bound to solid support of bead.
Applications
The applications of these scavenger resins are increasingly becoming popular these days. Primarily, they are used for synthesis of different medicinal drugs as its chemistry will permit a creation of many different structurally related compounds.
In general, various traditional techniques are used instead of employing scavenger resins in various chemical synthesis laboratories for purification. That is because if this is a H2S scavenger then it can produce very serious environmental hazard.
Following are few advantages and disadvantages of using any scavenger resins for the purpose of purification.
Advantages
- Product will remain in solution: Like in case of crystallization techniques, here the product will not be removed from the solution.
- Rapid purification time: As compared to traditional techniques, your products can always be purified within shorter time.
- Reaction can be monitored: Here the purification process will be properly controlled.
- Also, traditional purity techniques can be used.
- Can also be used in little excess.
- Can be removed by filtration.
- For complex compound libraries it can allow for synthesis.
- Can be customized: For different impurities certain different scavenger resins are employed.
- High solvent compatibility, as you can use with many different solvents.
Disadvantages
- In order to remove impurities large quantities may be needed in few cases.
- Can pose barriers on any small-scale reactions with “clogging up” your test tube reaction.
- Highly dependent upon the reagent that is to be removed
As we mentioned before, that nonionic surfactants are having no charge. You can commonly find them in detergents used in the laundry or dishwashers and are widely used surfactants.
Usually, its molecule does not contain any charge and hence they will not produce any soap scum in hard water. They may be little less effective as compared to anionic, but it causes less irritation in the skin.
Mostly, you will find their application in various personal care products and also for disinfectant products used in the industries. Though anionic surfactants may be quite popular, but this variety will be next to them.
The hard water has higher mineral content, mostly nonionic surfactants that can be more heavily marketed because they will not form any soap scum.
Also, they are less likely to create any skin irritation, but these are associated with less potent ability of cleaning.
Generally, these nonionic surfactants can also be found in many different household products, and the basic advantage of these surfactants is that they do not form any ‘soap scum’ particularly in hard water.
In most of the countries, you will not find any legal bindings for cleaning your products or they never specify which surfactants must be used. Hence, you can choose your cleaner as per your convenience.
Commercial use
During the time from 1997 itself these organic scavenger resins were in use commercially in the water filters. Organic anion resins were used for removing impurities from the drinking water instead of reverse osmosis.
By using these resins, it is possible to remove all negatively charged organic molecules present in water, e.g. bicarbonates, nitrates and sulfates. About 60% to 80% of the organic impurities present in water can be removed by using these methods.
