Removal of trace iron from organic substances
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I have a high-purity solid organic compound that contains trace amounts of iron impurities; after filtration and recrystallization, it still has extremely low levels of iron. What methods can be used to eliminate all traces of iron?
If your substance is insoluble in water but soluble in organic solvents, you can dissolve it using an organic solvent, then add water and EDTA to remove iron; after separation of the layers, the organic solvent can be evaporated. Alternatively, add water and EDTA, stir and grind using glass balls, filter, and dry. If it is also soluble in water, it becomes difficult to handle, and one can only find solutions related to the equipment.
You can try using adsorption to remove it; QQ: 1047962245
If it is iron powder, can it be removed using EDTA?
Excuse me, on the second floor, what adsorbent is used to remove iron powder?
Reply to 5# wangxc1986: If it is pure iron, it can be removed using a magnetic separator with a strength of 100,000 gauss. (i.e., magnet attraction)
It has been cleaned with magnets and filtered through membranes, but there are still extremely small amounts of impurities that cannot be removed. My product is used in liquid crystal production, and it is required to be free of iron.
Reply to 7# wangxc1986: What kind of magnet? Tetrabromobisphenol A is used in printed circuit boards, and iron removal is carried out using a magnet with a strength of 100,000 gauss. If that still doesn’t work, then the only option is to find a solution within the production process, trying to avoid using iron or stainless steel.
Which brand offers the best magnetic stand with 100,000 gauss of magnetism?