Abstract: The invention relates to a process for obtaining material of value from a bauxite residue which is obtainable or has been obtained by the Bayer process. This process comprises the steps of a) providing an aqueous suspension of the bauxite residue, b) setting a pH of the suspension to a value between 7.2 and 12.2, c) at least partly deagglomerating suspended mineral agglomerates of the bauxite residue, and d) separating the resulting mixture into an iron-rich fraction and into at least one further, preferably silicate-rich fraction. The invention further relates to an apparatus (10) for carrying out the process.

Abstract: The invention relates to a process for obtaining material of value from a bauxite residue which is obtainable or has been obtained by the Bayer process. This process comprises the steps of a) providing an aqueous suspension of the bauxite residue, b) setting a pH of the suspension to a value between 7.2 and 12.2, c) at least partly deagglomerating suspended mineral agglomerates of the bauxite residue, and d) separating the resulting mixture into an iron-rich fraction and into at least one further, preferably silicate-rich fraction. The invention further relates to an apparatus (10) for carrying out the process.

Abstract: The invention relates to a method for obtaining magnetite using red mud, which is produced by the method used by Bayer for the manufacture of aluminum. The method according to the invention comprises at least the reduction of hematite and/or goethite to form magnetite using at least one reductant, said reductant containing at least one vegetable oil and/or a fat and/or carbon.

Abstract: The invention relates to a method for producing a catalyst for cracking organic carbon compounds, said method comprising the following steps: a) producing an aqueous suspension comprising red mud and at least one calcium salt, b) heating the suspension to a temperature between 25° C. and 78° C., and c) removing at least most part of an aqueous phase from a solid product mixture produced in step b), said solid product mixture comprising the catalyst. The invention further relates to a catalyst and to a method for cracking organic carbon compounds.

Abstract: The invention pertains to a woven antistatic flexible intermediate bulk container (FIBC) comprising a polyolefin fiber or strip containing as an antistatic additive a polyetheresteramide, a polyester-ether block copolymer or an antistatic composition containing said polyetheresteramide or said polyester-ether block copolymer at least partially, as warp and/or weft thread.

Abstract: The invention relates to a process for alkaline hydrolysis of carboxylic acid derivatives, especially carboxylic esters, to carboxylic acids, wherein, for the alkaline hydrolysis of the carboxylic acid derivatives, red mud which is produced by the Bayer process used for aluminum production is used as a reaction-promoting component, especially as a hydroxide ion source.

Abstract: The invention relates to a method for transesterification of at least one component comprising at least one ester group with at least one component comprising at least one hydroxyl group, wherein the red mud produced in the Bayer process used for producing aluminum is added to the method as a reaction-promoting component. The invention also relates to the use of carboxylic acid salts produced during the transesterification method as plant treating agents and as detergents in cleaning and washing agents. The invention also relates to the use of dealkalized red mud obtained by means of the method according to the invention as the iron-contributing component of an iron fertilizer which can be used in particular in agriculture and to which limestone can also be added.

Abstract: The invention relates to a process for alkaline hydrolysis of carboxylic acid derivatives, especially carboxylic esters, to carboxylic acids, wherein, for the alkaline hydrolysis of the carboxylic acid derivatives, red mud which is produced by the Bayer process used for aluminum production is used as a reaction-promoting component, especially as a hydroxide ion source.

Abstract: The invention relates to a method for transesterification of at least one component comprising at least one ester group with at least one component comprising at least one hydroxyl group, wherein the red mud produced in the Bayer process used for producing aluminum is added to the method as a reaction-promoting component. The invention also relates to the use of carboxylic acid salts produced during the transesterification method as plant treating agents and as detergents in cleaning and washing agents. The invention also relates to the use of dealkalized red mud obtained by means of the method according to the invention as the iron-contributing component of an iron fertilizer which can be used in particular in agriculture and to which limestone can also be added.

Abstract: The invention relates to a method for obtaining valuable products using red mud, which accumulates during the manufacture of aluminum by the Bayer method. The method according to the invention comprises the steps: a) reduction of at least one part of the iron(III) oxide and/or iron(III) hydroxide using at least one reductant that contains at least one hydrocarbon; and b) separation of at least one solid phase of the reaction mixture from at least one liquid and/or gaseous phase, the solid and/or liquid and/or gaseous phase comprising at least one valuable product that at least contains magnetite and the reductant comprising methane and/or natural gas and/or ethanol and/or carbon.

Abstract: The invention relates to a method for obtaining magnetite using red mud, which is produced by the method used by Bayer for the manufacture of aluminum. The method according to the invention comprises at least the reduction of hematite and/or goethite to form magnetite using at least one reductant, said reductant containing at least one vegetable oil and/or a fat and/or carbon.

Abstract: The invention pertains to a woven antistatic flexible intermediate bulk container (FIBC) comprising a polyoletin fiber or strip containing as an antistatic additive a polyetheresteramide, a polyester-ether block copolymer or an antistatic composition containing said polyetheresteramide or said polyester-ether block copolymer at least partially, as warp and/or weft thread.

Abstract: A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an acid solution, and subjecting the slurried flotation concentrate to a chlorine leach at atmospheric pressure followed by an oxidative pressure leach. After liquid-solids separation and purification of the concentrate resulting in the removal of copper and cobalt, the nickel-containing solution is directly treated by electrowinning to recover nickel cathode therefrom.

Abstract: A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an acid solution, and subjecting the slurried flotation concentrate to a chlorine leach at atmospheric pressure followed by an oxidative pressure leach. After liquid-solids separation and purification of the concentrate resulting in the removal of copper and cobalt, the nickel-containing solution is directly treated by electrowinning to recover nickel cathode therefrom.

Abstract: A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an acid solution, and subjecting the slurried flotation concentrate to a chlorine leach at atmospheric pressure followed by an oxidative pressure leach. After liquid-solids separation and purification of the concentrate resulting in the removal of copper and cobalt, the nickel-containing solution is directly treated by electrowinning to recover nickel cathode therefrom.

Abstract: The process provides a method of removing arsenic from solutions containing sulfur dioxide in an environmentally acceptable manner. This process first oxidizes arsenic, iron and sulfur dioxide contained in an aqueous solution to prepare the solution for precipitation and to improve process control. Recycled neutralized precipitate seeds the oxidized aqueous solution. A calcium-containing base precipitates products of neutralization on the seeds. The final neutralized precipitate contains a stable ferric arsenate compounds.

Abstract: The invention provides a method of regenerating dithiophosphorus extractants such as dithiophosphoric acids, dithiophosphonic acids and dithiophosphinic acids from their sulfur-sulfur bonded oxidation products contained in an organic solution. The process generates active hydrogen for regenerating the spent dithiophosphorus extractants. Advantageously, this active hydrogen originates either from introducing a reactive metal into a liquid mixture containing the organic solution and an acidic aqueous solution to form nascent hydrogen or from using hydrogen gas in the presence of a catalyst in the organic solution. The active hydrogen generated in the process breaks the sulfur-sulfur bonds of the dithiophosphorus molecules to form the corresponding dithiophosphorus acids.

Abstract: The invention relates to new compounds of acylated splenopentins of Formula IR.sup.1 -arg-lys-(R.sup.2)-glu-val-tyr(R.sup.3)R.sup.4 Iwherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 are as defined in the specification, methods for their synthesis by acylation of splenopentins, as well as to their use as pharmacologically active peptides which are suitable for normalizing the function of the immunological system in primary and secondary immunological deficiencies.

Abstract: The invention provides an autoclave configuration for pressure leaching lateritic ores at elevated temperatures. The autoclave configuration includes at least one primary autoclave. The primary autoclave includes a slurry inlet port for receiving slurries of lateritic ore from a lateritic slurry supply, an acid inlet port for receiving leaching acids, an agitation means for agitating the slurries of lateritic ore, and an outer port for removing partially leached slurries of lateritic ore. A multi-compartment autoclave follows the primary autoclave. The multi-compartment autoclave is divided into at least two chambers connected in series. The chambers contain a means for agitating the partially leached slurries and divider walls for separating the chambers. An inlet port is connected to the first of the chambers for receipt of the partially leached slurries. An outlet port is connected to the last of the series of chambers for removal of the finally leached slurries.

Abstract: The invention provides an autoclave configuration for pressure leaching lateritic ores at elevated temperatures. The autoclave configuration includes at least one primary autoclave. The primary autoclave includes a slurry inlet port for receiving slurries of lateritic ore from a lateritic slurry supply, an acid inlet port for receiving leaching acids, an agitation means for agitating the slurries of lateritic ore, and an outlet port for removing partially leached slurries of lateritic ore. A multi-compartment autoclave follows the primary autoclave. The multi-compartment autoclave is divided into at least two chambers connected in series. The chambers contain a means for agitating the partially leached slurries and divider walls for separating the chambers. An inlet port is connected to the first of the chambers for receipt of the partially leached slurries. An outlet port is connected to the last of the series of chambers for removal of the finally leached slurries.