A process disclosed herein is related to the isolation and purification of substantially pure chemicals, including silica gel, sodium silicate, aluminum silicate, iron oxide, and rare earth elements (or rare earth metals, REEs), from massive industrial waste coal ash. In one embodiment, the process includes a plurality of caustic extractions of coal ash at an elevated temperature, followed by an acidic treatment to dissolve aluminum silicate and REEs. The dissolved aluminum silicate is precipitated out by pH adjustment as a solid product while REEs remain in the solution. REEs are captured and enriched using an ion exchange column. Alternatively, the solution containing aluminum silicate and REEs is heated to produce silica gel, which is easily separated from the enriched REEs solution. REEs are then isolated and purified from the enriched solution to afford substantially pure individual REE by a ligand-assisted chromatography. Additionally, a simplified process using one caustic extraction and one acidic extraction with an ion exchange process was also investigated and optimized to afford a comparable efficiency.

A composition including: (i) a plurality of first particles comprising: about 25% to about 94% by weight a water soluble first carrier; and a perfume; wherein each of the first particles has a mass from about 1 mg to about 1 g; (ii) a plurality of second particles having: about 25% to about 94% by weight a water soluble second carrier; about 5% to about 45% by weight a quaternary ammonium compound formed from a parent fatty acid compound having an Iodine Value from about 18 to about 60; and about 0.5% to about 10% by weight a cationic polymer; wherein each of the second particles has a mass from about 1 mg to about 1 g; wherein the first particles and the second particles are in a package.

A composition including: (i) a plurality of first particles comprising: about 25% to about 94% by weight a water soluble first carrier; and a perfume; wherein each of the first particles has a mass from about 1 mg to about 1 g; (ii) a plurality of second particles having: about 25% to about 94% by weight a water soluble second carrier; about 5% to about 45% by weight a quaternary ammonium compound formed from a parent fatty acid compound having an Iodine Value from about 18 to about 60; and about 0.5% to about 10% by weight a cationic polymer; wherein each of the second particles has a mass from about 1 mg to about 1 g; wherein the first particles and the second particles are in a package.

A present disclosure describes about an improved form of purified crystalline sodium nitrite. The said form of sodium nitrite may comprise a purity level between 99% to 99.2%. The form of sodium nitrite may also comprise an amount of sodium nitrate no greater than 0.7%. The present disclosure also relates to a method of obtaining an improved form of purified crystalline sodium nitrite with minimum impurities.

A present disclosure describes about an improved form of purified crystalline sodium nitrite. The said form of sodium nitrite may comprise a purity level between 99% to 99.2%. The form of sodium nitrite may also comprise an amount of sodium nitrate no greater than 0.7%. The present disclosure also relates to a method of obtaining an improved form of purified crystalline sodium nitrite with minimum impurities.

A composition including: (i) a plurality of first particles comprising: about 25% to about 94% by weight a water soluble first carrier; and a perfume; wherein each of the first particles has a mass from about 1 mg to about 1 g; (ii) a plurality of second particles having: about 25% to about 94% by weight a water soluble second carrier; about 5% to about 45% by weight a quaternary ammonium compound formed from a parent fatty acid compound having an Iodine Value from about 18 to about 60; and about 0.5% to about 10% by weight a cationic polymer; wherein each of the second particles has a mass from about 1 mg to about 1 g; wherein the first particles and the second particles are in a package.

A composition including: (i) a plurality of first particles comprising: about 25% to about 94% by weight a water soluble first carrier; and a perfume; wherein each of the first particles has a mass from about 1 mg to about 1 g; (ii) a plurality of second particles having: about 25% to about 94% by weight a water soluble second carrier; about 5% to about 45% by weight a quaternary ammonium compound formed from a parent fatty acid compound having an Iodine Value from about 18 to about 60; and about 0.5% to about 10% by weight a cationic polymer; wherein each of the second particles has a mass from about 1 mg to about 1 g; wherein the first particles and the second particles are in a package.

A process disclosed herein is related to the isolation and purification of substantially pure chemicals, including silica gel, sodium silicate, aluminum silicate, iron oxide, and rare earth elements (or rare earth metals, REEs), from massive industrial waste coal ash. In one embodiment, the process includes a plurality of caustic extractions of coal ash at an elevated temperature, followed by an acidic treatment to dissolve aluminum silicate and REEs. The dissolved aluminum silicate is precipitated out by pH adjustment as a solid product while REEs remain in the solution. REEs are captured and enriched using an ion exchange column. Alternatively, the solution containing aluminum silicate and REEs is heated to produce silica gel, which is easily separated from the enriched REEs solution. REEs are then isolated and purified from the enriched solution to afford substantially pure individual REE by a ligand-assisted chromatography. Additionally, a simplified process using one caustic extraction and one acidic extraction with an ion exchange process was also investigated and optimized to afford a comparable efficiency.

A process disclosed herein is related to the isolation and purification of substantially pure chemicals, including silica gel, sodium silicate, aluminum silicate, iron oxide, and rare earth elements (or rare earth metals, REEs), from massive industrial waste coal ash. In one embodiment, the process includes a plurality of caustic extractions of coal ash at an elevated temperature, followed by an acidic treatment to dissolve aluminum silicate and REEs. The dissolved aluminum silicate is precipitated out by pH adjustment as a solid product while REEs remain in the solution. REEs are captured and enriched using an ion exchange column. Alternatively, the solution containing aluminum silicate and REEs is heated to produce silica gel, which is easily separated from the enriched REEs solution. REEs are then isolated and purified from the enriched solution to afford substantially pure individual REE by a ligand-assisted chromatography. Additionally, a simplified process using one caustic extraction and one acidic extraction with an ion exchange process was also investigated and optimized to afford a comparable efficiency.

A system and method of briquette formation of hygroscopic metallic salts. The system including a feed hopper unit, a vibrating sieve unit, a briquetting unit, a belt conveyer, a bucket elevator, a double deck vibrating sieve unit, a product hopper unit, a by-product hopper unit, and a product and by product packing unit. the briquetting unit comprising an inclined screw conveyer unit is configured for pushing hygroscopic salt material into the briquetting unit, one or more briquette rollers configured for compression of feed material into briquette stripes and a cutting assembly configured to cut briquette stripes and to obtain the briquette of hygroscopic metallic salt. Hygroscopic metallic salt briquette manufactured by the process is easy to handle, transportable, storage stable and causes minimum loss of salt before the end use.