A method of processing a non-virgin sulfuric acid solution for the preparation of aluminum sulfate comprises the steps of combining a sulfuric acid solution having less than 90% sulfuric acid with water to form a mixed solution of no less than about 10% sulfuric acid. An alumina-containing compound such as aluminum hydroxide or aluminum bauxite is then added, the combination forming a pH of 2.0 or less. Once a specific gravity of less than about 1.36 is reached, the aluminum sulfate cools and settles overnight before filtering and/or storing.

A method of processing a non-virgin sulfuric acid solution for the preparation of aluminum sulfate comprises the steps of combining a sulfuric acid solution having less than 90% sulfuric acid with water to form a mixed solution of no less than about 10% sulfuric acid. An alumina-containing compound such as aluminum hydroxide or aluminum bauxite is then added, the combination forming a pH of 2.0 or less. Once a specific gravity of less than about 1.36 is reached, the aluminum sulfate cools and settles overnight before filtering and/or storing.

A system and method for processing a sulfuric acid waste output for the preparation of aluminum sulfate comprises providing a sulfuric acid waste output at a manufacturing facility and feeding the output into an onsite system of preparing aluminum sulfate at the manufacturing facility. The sulfuric acid waste output may be fed into an onsite system for preparing aluminum sulfate either directly after its production as a byproduct output or after onsite storage of the output. By combining a water solution with the sulfuric acid waste output prior to adding an alumina-containing compound to the combined solution to form aluminum sulfate, the sulfuric acid waste output is safely converted into a useful output without the need for transport offsite.

A system and method for processing a sulfuric acid waste output for the preparation of aluminum sulfate comprises providing a sulfuric acid waste output at a manufacturing facility and feeding the output into an onsite system of preparing aluminum sulfate at the manufacturing facility. The sulfuric acid waste output may be fed into an onsite system for preparing aluminum sulfate either directly after its production as a byproduct output or after onsite storage of the output. By combining a water solution with the sulfuric acid waste output prior to adding an alumina-containing compound to the combined solution to form aluminum sulfate, the sulfuric acid waste output is safely converted into a useful output without the need for transport offsite.

Method for the secondary fusion aluminum slags treatment to obtain finished goods for agricultural, domestic and industrial use includes treating aluminous material with concentrated sulfuric acid to obtain aluminum sulfate, wherein the aluminous material comes from slags fed in lots of finite-dimension in a treatment plant of aluminum slags and includes aluminum oxides present in at least 30% by weight, the method includes: a) a first step of separating the metals present in the slags, by known methodologies, to obtain powders of metals as Fe, Cu, Zn, Ni and to obtain an aluminous component in the form of aluminum grains; b) a subsequent step of treating the aluminous component, with sulfuric acid to obtain aluminum sulfate in solution and/or in form of crystals; c) a subsequent step of obtaining a solid residual portion, derived from step b), apt to be used as a refractory material in applications with thermal character.

Method for the secondary fusion aluminum slags treatment to obtain finished goods for agricultural, domestic and industrial use includes treating aluminous material with concentrated sulfuric acid to obtain aluminum sulfate, wherein the aluminous material comes from slags fed in lots of finite-dimension in a treatment plant of aluminum slags and includes aluminum oxides present in at least 30% by weight, the method includes: a) a first step of separating the metals present in the slags, by known methodologies, to obtain powders of metals as Fe, Cu, Zn, Ni and to obtain an aluminous component in the form of aluminum grains; b) a subsequent step of treating the aluminous component, with sulfuric acid to obtain aluminum sulfate in solution and/or in form of crystals; c) a subsequent step of obtaining a solid residual portion, derived from step b), apt to be used as a refractory material in applications with thermal character.

A supported catalyst, its method of preparation and use in hydrogenation methods, which catalyst contains an oxide substrate that is for the most part calcined aluminum and an active phase that contains nickel, with the nickel content between 5 and 65% by weight in relation to the total mass of the catalyst, with the active phase not containing a metal from group VIB, the nickel particles having a diameter that is less than or equal to 20 nm, the catalyst having a median mesopore diameter of between 14 nm and 30 nm, a median macropore diameter of between 50 and 200 nm, a mesopore volume that is measured by mercury porosimetry that is greater than or equal to 0.40 mL/g, and a total pore volume that is measured by mercury porosimetry that is greater than or equal to 0.42 mL/g.

A supported catalyst, its method of preparation and use in hydrogenation methods, which catalyst contains an oxide substrate that is for the most part calcined aluminum and an active phase that contains nickel, with the nickel content between 5 and 65% by weight in relation to the total mass of the catalyst, with the active phase not containing a metal from group VIB, the nickel particles having a diameter that is less than or equal to 20 nm, the catalyst having a median mesopore diameter of between 14 nm and 30 nm, a median macropore diameter of between 50 and 200 nm, a mesopore volume that is measured by mercury porosimetry that is greater than or equal to 0.40 mL/g, and a total pore volume that is measured by mercury porosimetry that is greater than or equal to 0.42 mL/g.

A method of processing a non-virgin sulfuric acid solution for the preparation of aluminum sulfate comprises the steps of combining a sulfuric acid solution having less than about 90% sulfuric acid with a water solution to form a mixed solution of no less than about 10% sulfuric acid. An alumina-containing compound such as aluminum hydroxide or aluminum bauxite is then added to the mixed solution to form aluminum sulfate.

A method of processing a non-virgin sulfuric acid solution for the preparation of aluminum sulfate comprises the steps of combining a sulfuric acid solution having less than about 90% sulfuric acid with a water solution to form a mixed solution of no less than about 10% sulfuric acid. An alumina-containing compound such as aluminum hydroxide or aluminum bauxite is then added to the mixed solution to form aluminum sulfate.