# US 2019/0169048 A1 · Desalination method using superabsorbant polymers

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- Number: US 2019/0169048 A1
- Document ID: US20190169048A1
- Status: Published application
- Kind: A1
- Application number: 16/224,237
- Filed: 2018-12-18
- Published: 2019-06-06
- Earliest claimed: 2016-04-28
- Inventors: Chaitanya Karamchedu
- Web page: https://patentgrep.com/patent/US20190169048A1

## CPC

- C02F 1/285: {using synthetic organic sorbents}
- B01J 20/24: Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
- B01J 20/264: {derived from different types of monomers, e.g. linear or branched copolymers, block copolymers, graft copolymers}
- C02F 1/265: {Desalination}
- C02F 1/004: {using large scale industrial sized filters}
- C02F 2103/08: Seawater, e.g. for desalination
- C02F 2303/16: Regeneration of sorbents, filters
- 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)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

Method and apparatus for producing desalinated water are disclosed herein. In embodiments, a method may comprise adding superabsorbent polymer to salt water to form a mixture of hydrogel and brine; and extracting desalinated water from the mixture of hydrogel and brine. Other embodiments may be described and claimed.

## Claims

### Claim 1

A method for producing arable hydrogel or desalinated water, comprising:
adding superabsorbent polymer to salt water to form a mixture of hydrogel and brine; and
extracting arable hydrogel or desalinated water from the mixture of hydrogel and brine.

### Claim 2 (depends on 1)

The method of claim 1, wherein adding comprises adding starch-g-polyacrylamide(SG-PAM) to the salt water.

### Claim 3 (depends on 1)

The method of claim 1, wherein extracting comprises separating the hydrogel and brine.

### Claim 4 (depends on 3)

The method of claim 3, wherein the mixture of hydrogel and brine is a first mixture, and extracting further comprises adding H2SO4 to the separated hydrogel to form a second mixture of hydrogel and H2SO4.

### Claim 5 (depends on 4)

The method of claim 4, wherein extracting further comprises removing the superabsorbent polymer from the second mixture of hydrogel and H2SO4 to form a third mixture of water and H2SO4.

### Claim 6 (depends on 5)

The method of claim 5, wherein extracting further comprises adding Ca(OH)2 to the third mixture of water and H2SO4 to form a fourth mixture of water and CaSO4.

### Claim 7 (depends on 6)

The method of claim 6, wherein extracting further comprises removing CaSO4 from the fourth mixture of water and CaSO4 to produce the desalinated water.

### Claim 8 (depends on 1)

The method of claim 1, wherein the salt water is seawater.