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US 6,320,087 B2Granted
Adsorbent for separating halogenated aromatic compounds and separation method
AssigneeToray Industries, Inc.
InventorsKazuyoshi Iwayama, Shinobu Yamakawa, Masashi Kato, Hirohito Okino
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Abstract
An adsorbing and separating agent for halogenated aromatic compounds and an adsorbing and separating method for the compounds, using an adsorbent which has a porosity of from 0.20 cc/cc to 0.37 cc/cc, a packing density of from 0.50 g/ml to 0.70 g/ml, and a grain size of from 0.1 mm to 1.0 mm.
Claims7
A method for separating an isomer from mixed halogenated aromatic isomers, which comprises processing said isomer to provide a mixture having a dissolved oxygen content of at most 15 ppm by weight,
- contacting an adsorbent formed by kneading a zeolite powder with water;
- extruding the resultant paste into pellets;
- and rounding said pellets to form absorbent particles having
- a) porosity of from 0.20 cc/cc to 0.37 cc/cc;
- b) packing density of from 0.50 g/ml to 0.70 g/ml;
- and
- c) grain size of from 0.1 mm to 1.0 mm;
- with said mixture of halogenated aromatic compound isomers having to thereby separate at least one said halogenated aromatic isomer from said mixture.
5 more elements
A method for separating mixed halogenated aromatic isomers,
- comprising passing said mixed halogenated aromatic isomers into an adsorbent formed by kneading a zeolite powder with water;
- extruding the resultant paste into pellets;
- and rounding said pellets to form absorbent particles having
- a) porosity of from 0.20 cc/cc to 0.37 cc/cc;
- b) packing density of from 0.50 g/ml to 0.70 g/ml;
- and
- c) grain size of from 0.1 mm to 1.0 mm;
- to separate at least one said halogenated aromatic compound isomer from said mixture of said halogenated aromatic compound isomers.
5 more elements
Dependencies are inferred from the claim text.