# US 4,400,305 A · Adsorbents comprising hydrated ferrites of Ti, Zr, and Sn and cured thermosetting resins

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- Number: US 4,400,305 A
- Document ID: US4400305A
- Status: Granted
- Kind: A
- Application number: 06/236,309
- Filed: 1981-02-20
- Granted: 1983-08-23
- Earliest claimed: 1980-02-25
- Assignees: Takeda Chemical Industries, Ltd.
- Inventors: Tatsuro Takeuchi; Sokukawa Masaki; Kimoto Ryuzo
- Web page: https://patentgrep.com/patent/US4400305A

## CPC

- B01J 20/28026: {Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin}
- B01J 20/06: comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J 20/28009: {Magnetic properties}
- C02F 1/288: {using composite sorbents, e.g. coated, impregnated, multi-layered}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

An adsorbent, which has been prepared by mixing (a) one part by weight of (i) at least one member selected from the group consisting of hydrated ferrites of titanium, zirconium and tin or (ii) a mixture of the said hydrated ferrites(s) and at least one member selected from the group consisting of hydrated oxides of titanium, zirconium, tin and iron with (b) about 1/10 to 3 parts by weight of a thermosetting resin showing resistance to acids and alkalis such as an unsaturated polyester or polyurethane resin, followed by curing. The adsorbent can be used to adsorb a great variety of anions and cations and especially as an adsorbent for phosphate ions. The adsorbent shows excellent resistance to acids and alkalis, and can be subjected to repeated desorption and regeneration procedures without causing any deterioration of its adsorptive capacity, thus permitting its repeated usage over a long period of time. The adsorbent can be magnetically separated, and facilitates solid-liquid separation.

## Claims

### Claim 1

An adsorbent, which has been prepared by mixing (a) one part by weight of (i) at least one member selected from the group consisting of hydrated ferrites of titanium, zirconium and tin or (ii) a mixture of the said hydrated ferrites and at least one member selected from the group consisting of hydrated oxides of titanium, zirconium, tin and iron with (b) about 1/10 to 3 parts by weight of an unsaturated polyester or polyurethane, followed by curing.

### Claim 2 (depends on 1)

An adsorbent as claimed in claim 1, wherein the resin content is about 1/5 to 1 part by weight.

### Claim 3 (depends on 1)

An adsorbent as claimed in claim 1, wherein the component (ii) is a mixture of hydrated ferrite of zirconium and hydrated oxide of zirconium.