Functionalized brine sludge material and a process for the preparation thereof

Patent metadata

Field	Value
Publication number	US-9890081-B2
Application number	US-201615245521-A
Country	US
Kind code	B2
Filing date	Aug 24, 2016
Priority date	Sep 2, 2015
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

Brine sludge is an industrial waste generated in chloral alkali industry. The generated brine sludge waste is dumped into landfills and contains barium sulphate, calcium carbonate, magnesium hydroxide, sodium chloride, clay, and toxic elements like chromium, zinc, copper, and vanadium, therefore posing an environmental threat. Consequently, there is an urgent need to convert toxic brine sludge waste into its non-toxic form. The present invention thus aims to achieve total utilization of this brine sludge for making functionalized brine sludge material useful for a broad application spectrum.

First claim

We claim:

1. A functionalized brine sludge material comprising:
10 g to 50 g of brine sludge;
50 g to 100 g of fly ash;
6 g to 13 g of sodium hydroxide;
250 ml to 500 ml of ethylene glycol;
1 g to 10 g of cetyl trimethyl ammonium bromide; and
12 ml to 26 ml of water.

2. The material as claimed in claim 1 , wherein the material is useful for the preparation of radiation shielding materials, geopolymeric materials, and chemically designed composite materials.

3. The material as claimed in claim 1 , wherein the material comprises 45 g of brine sludge, 45 g of fly ash, 6 g of sodium hydroxide, 300 ml of ethylene glycol, 10 g of cetyl trimethyl ammonium bromide, and 12 ml of water.

4. A process for the preparation of the functionalized brine sludge material as claimed in claim 1 , the process comprising:
(a) refluxing a homogenized mixture of brine sludge, fly ash, sodium hydroxide, ethylene glycol, cetyl trimethyl ammonium bromide, and water in a round bottom flask; and
(b) filtering the mixture as obtained in step (a) followed by drying in an air oven at a temperature of 100 to 110 degrees C. for a period of 1 to 2 hours, resulting in an in-situ synthesized functionalized brine sludge material.

5. The process as claimed in claim 4 , wherein refluxing in step (a) is done at a temperature of 190 to 250 degrees C. for a duration of 2 to 6 hours using conventional heating.

6. The process as claimed in claim 4 , wherein refluxing in step (a) is done at a temperature of 40 to 45 degrees C. for a duration of 15 to 20 minutes using microwave heating.

7. The process as claimed in claim 4 , wherein drying in step (b) is done at a temperature of 110 degrees C. for a duration of 1 to 2 hours.

Assignees

• Council Scient Ind Res

Inventors

• Amritphale Sudhir Sitaram
• Verma Sarika
• Das Satyabrata

Classifications

• C04B40/0014

  Microwaves · CPC title

• C04B28/021

  Ash cements, e.g. fly ash cements (fly ash as filler C04B18/08); Cements based on incineration residues, e.g. alkali-activated slags from waste incineration (alkali-activated combustion residues as such C04B7/243; mixtures of the lime-pozzuolane type C04B28/18); Kiln dust cements · CPC title

• C04B24/005

  Halogen-containing compounds · CPC title

• Y02W30/91

  Use of waste materials as fillers for mortars or concrete · CPC title

• C04B18/0418 Primary

  Wet materials, e.g. slurries · CPC title