Processes for preparing alumina and various other products

A process for preparing alumina, said process comprising:

• leaching an aluminum-containing material, that is an industrial waste product, with HCl so as to obtain a leachate comprising aluminum ions and a solid, and separating said solid from said leachate;
• reacting said leachate with HCl so as to obtain a liquid and a precipitate comprising said aluminum ions in the form of AlCl3, and separating said precipitate from said liquid;
• reacting the precipitate with a base;
• and
• heating said precipitate under conditions effective for converting the precipitate into Al2O3.

A process for preparing alumina, said process comprising:

• leaching an aluminum-containing material with HCl so as to obtain a leachate comprising aluminum ions and a solid, and separating said solid from said leachate;
• reacting said leachate with HCl so as to obtain a liquid and a precipitate comprising said aluminum ions in the form of AlCl3, and separating said precipitate from said liquid;
• reacting the precipitate with a base;
• and
• heating said precipitate under conditions effective for converting the precipitate into Al2O3.

A process for preparing alumina, said process comprising:

• leaching an aluminum-containing material, that is an industrial waste product, with an acid so as to obtain a leachate comprising aluminum ions and a solid, and separating said solid from said leachate;
• reacting said leachate with HCl so as to obtain a liquid and a precipitate comprising said aluminum ions in the form of AlCl3, and separating said precipitate from said liquid;
• reacting the precipitate with a base;
• and
• heating said precipitate under conditions effective for converting the precipitate into Al2O3.

A process for preparing alumina, said process comprising:

• leaching an aluminum-containing material with an acid so as to obtain a leachate comprising aluminum ions and a solid, and separating said solid from said leachate;
• reacting said leachate with HCl so as to obtain a liquid and a precipitate comprising said aluminum ions in the form of AlCl3, and separating said precipitate from said liquid;
• reacting the precipitate with a base;
• and
• heating said precipitate under conditions effective for converting the precipitate into Al2O3.