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Amorphous form of chelating agents and process for preparing them
An amorphous form of a chelating agent is provided, in particular wherein the chelating agent comprises EDTA鈥/edetic acid (EDTA)鈥, diethylenetriaminepentaacetic acid鈥/pentetic acid (DTPA)鈥, nitrilotriacetic acid (NTA)鈥, amino tris(methylenephosphonic acid) (ATMP)鈥, ethylenediamine tetramethylene phosphonic acid (EDTMP)鈥, 1-鈥媓ydroxyethane 1,鈥1-鈥媎iphosphonic acid (HEDP)鈥, ethylenediaminedisuccinic acid (EDDS)鈥, iminodisuccinic acid (IDS)鈥, hydroxamic acid, oxalic acid, galactaric acid, metaphosphoric acid, or phytic acid, or a salt of any one or more of the above acids, or a mixt. of two or more of any of the above acids or salts thereof.听 A process for prepg. an amorphous form of a chelating agent comprises the steps of: (a) Dissolving the chelating agent in a suitable solvent; (b) Optionally purifying the soln.; (c) Isolating an amorphous form of the chelating agent; (d) Optionally post drying or conditioning the amorphous form of the chelating agent.听 The field comprises: pulp bleaching, food and beverage preservation, industrial cleaning, detergents, cement, personal care and cosmetics, fertilizers, water treatment, or removal of and deactivation of metal ions in textiles.
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