What are the types of ion exchange resins?
Ion exchange resins consists of two main types, i.e., cation exchange resins, that exchange positively charged ions, such as sodium, for calcium, and anion exchange resins, that exchange negatively charged ions, such as chloride, for arsenic.
What is mixed ion exchange resin?
Mixed bed resins or mixed bed ion exchange resins are mainly used in the water purification industry for polishing process water to achieve demineralized water quality (such as after a reverse osmosis system). Mixed bed as the name states consists of strong acid cation exchange and strong base anion exchange resin.
What are ion exchange resins made of?
Ion-exchange resins are generally made from methacrylic acid, sulfonated styrene, and divinylbenzene (DVB). A generic structure of such cation-exchange resin is shown in Fig.
How does ion exchange resin work?
Ion exchange resins are used to produce deionized (demineralized or “DI”) water. These resins are small plastic beads that are composed of organic polymer chains that have charged functional groups built into the resin bead. Cation resin has a negative functional group and therefore attracts positively charged ions.
How often do ion exchange resins need to be replaced?
about 10 to 15 years
What is ion exchange resin used for?
In industrial and domestic applications, ion-exchange resins are used for the removal of calcium, magnesium, iron, and manganese salts from water (water softening), for purification of sugar, and for concentration of valuable elements, such as gold, silver, and uranium from mineral ores.
What happens during ion exchange?
ion-exchange reaction, any of a class of chemical reactions between two substances (each consisting of positively and negatively charged species called ions) that involves an exchange of one or more ionic components. Ions are atoms, or groups of atoms, that bear a positive or negative electric charge.
What are the two uses of ion?
Uses for ion exchange chromatography
- separation of proteins from foods, for example, to investigate the effects of individual food components on health – this type of analysis is used in nutrition research.
- separation of high value proteins from substances.
- drinking water analysis for pollution and other constituents.
Why are resins used?
The primary functions of the resin are to transfer stress between the reinforcing fibers, act as a glue to hold the fibers together, and protect the fibers from mechanical and environmental damage. Resins used in reinforced polymer composites are either thermoplastic or thermoset.
What are the uses of resins in our daily life?
Because of their adhesive properties, epoxy resin is commonly used to repair everyday items. For example, cracked or broken glass and ceramic can be fixed using epoxy resin. Epoxy resin can also be useful in maintaining and strengthening these objects to prolong their usable life.
What are the types of resins?
Types of Resins and Their Uses
- Polyester Resins. Polyester resins are formed from the reaction of dibasic organic acids and polyhydric alcohols.
- Phenolic Resins. Phenolic resins are a type of thermosetting resin.
- Alkyd Resins.
- Polycarbonate Resins.
- Polyamide Resins.
- Polyurethane Resins.
- Silicone Resins.
- Epoxy Resins.
Why is resin dangerous?
Generally, one can say that the pure epoxy resins are considered as non-toxic, the risk of damage caused by ingestion of epoxy resin can be considered as very small. It can be irritant, which can give toxic eczema, or sensitizer, which can give allergic contact dermatitis.
Is resin cancerous?
Polyester Resin (Styrene, a central component in polyester resin and many other plastics, is known to be both genotoxic and carcinogenic.)
Is resin really dangerous?
Craft Resin is considered a non-hazardous material and is non-toxic when used as directed, however there are some common sense safety precautions that every user should follow: 1 – Wear gloves. Epoxy resin is very sticky in its liquid form, so gloves will protect the user from a mess, as well as skin irritation.
Should you wear a mask when using resin?
When sanding, grinding, or drilling resin, wear a particle mask or a NIOSH respirator approved for dust. It is important not to inhale the resin dust, which could potentially cause an allergic reaction.
Should you wear a mask when working with epoxy resin?
When you can’t adequately ventilate your workspace, wear appropriate respiratory protection. Provide ventilation and wear a dust/mist mask or respirator when sanding epoxy, especially partially cured epoxy. Breathing partially cured epoxy dust increases your risk of sensitization.
What happens if you get resin on your skin?
Repeated skin contact with resins and hardeners may also cause chronic contact dermatitis, which is usually milder but longer lasting. If left untreated for long periods it can progress to eczema, a form of dermatitis that can include swelling, blisters, and itching.
What kind of mask should I use for resin?
The proper full face respirator mask for epoxy resin protection will have an N95 or N95 equivalent rating, which means that it will block at least 95% of small particles; small meaning around the size of 0.3 microns.
Can you use resin without a mask?
Respiration. Epoxy doesn’t generate much in the way of fumes, and the fumes aren’t labeled as poisonous (a technical distinction, see footnote1). Using small amounts in a well ventilated place is safe, and you generally don’t need a respirator to occasionally make some small castings.
Do you need PPE for UV resin?
ALWAYS use appropriate PPE for the hazard: UV face shield, goggles, gloves, buttoned-up lab coat.