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Zeolite exhibited in the Estonian Museum of Natural History. Zeolite is a group of several microporous, crystalline aluminosilicate minerals commonly used as commercial adsorbents and catalysts. [1] They mainly consist of silicon, aluminium, oxygen, and have the general formula M n+ 1/n (AlO 2) − (SiO 2) x ･y H 2 O where M n+ 1/n is either ...
Use of clinoptilolite in industry and academia focuses on its ion exchange properties having a strong exchange affinity for ammonium (NH 4 +). A typical example of this is in its use as an enzyme-based urea sensor. [6] The name is derived from the Greek words klino (κλίνω; "oblique"), ptylon (φτερών; "feather"), and lithos ...
The substance must be shown to be "generally recognized" as safe under the conditions of its intended use. [2] For new proposals, the proponent of the exemption – usually a food manufacturer or ingredient supplier wishing to highlight a food ingredient in its manufactured product – has the burden of providing rigorous scientific evidence ...
Sodium aluminosilicate refers to compounds which contain sodium, aluminium, silicon and oxygen, and which may also contain water.These include synthetic amorphous sodium aluminosilicate, a few naturally occurring minerals and synthetic zeolites.
Faujasite (FAU-type zeolite) is a mineral group in the zeolite family of silicate minerals.The group consists of faujasite-Na, faujasite-Mg and faujasite-Ca. They all share the same basic formula (Na 2,Ca,Mg) 3.5 [Al 7 Si 17 O 48]·32(H 2 O) by varying the amounts of sodium, magnesium and calcium. [1]
The main use of zeolitic molecular sieves is in laundry detergents. In 2001, an estimated 1200 kilotons of zeolite A were produced for this purpose, which entails water softening. [2] 4A molecular sieves are widely used to dry laboratory solvents. [7]
The petition filed by over 20 consumer advocacy groups in 2022 that argued for the removal of Red Dye No. 3 from food and dietary supplements cited studies, the FDA's prior use of the Delaney ...
The ferrierite group of zeolite minerals (the FER structure) consists of four very similar species: ferrierite-Mg, ferrierite-Na, ferrierite-NH4 and ferrierite-K, based on the dominant cation in the A location. ferrierite-Mg and ferrierite-K are orthorhombic minerals and ferrierite-Na is monoclinic with highly variable cationic composition (Na,K) 2 Mg(Si,Al) 18 O 36 (OH)·9H 2 O.
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