Abstract: A process treats production water resulting from enhanced oil recovery, the production water comprising an aqueous phase and an organic phase dispersed in the aqueous phase, and at least one polymer in the aqueous phase. The process includes: a step of bringing said production water into contact with an additive comprising at least one tetrakis(hydroxymethyl)phosphonium salt (THMP salt), a step of separating the aqueous phase and the organic phase of said production water comprising said additive, by means of a hydrocyclone. An enhanced recovery process uses a step of treating the production water according to the invention.

Abstract: The invention relates to a process for treating production water resulting from enhanced oil recovery, said production water comprising an aqueous phase and an organic phase dispersed in said aqueous phase, and at least one polymer in the aqueous phase, said process comprising: a step of bringing said production water into contact with an additive comprising at least one tetrakis(hydroxymethyl)phosphonium salt (THMP salt), a step of separating the aqueous phase and the organic phase of said production water comprising said additive, by means of a hydrocyclone. The invention also relates to an enhanced recovery process using a step of treating the production water according to the invention.

Abstract: A novel alumina gel is described having an elevated dispersibility index, and in particular a dispersibility index greater than 70%, a crystallite size between 1 and 35 nm, and a sulphur content between 0.001% and 2% by weight, and a sodium content between 0.001% and 2% by weight, the weight percentages being expressed in relation to the total mass of alumina gel. The present invention also discloses the method for preparing said gel comprising at least one step of precipitating at least one aluminium salt, at least one step of heating the suspension obtained and a final heat treatment step for forming the alumina gel.

Abstract: An amorphous mesoporous alumina having a connectivity (Z) greater than 2.7 is described. The present invention also relates to the process for preparing the said alumina, comprising at least one precipitation step of at least one aluminum salt, at least one heating step of the suspension obtained, a thermal treatment step to form the alumina gel, a gentle drying step or spray drying step, a moulding step of the powder obtained, and a final thermal treatment step in order to obtain the alumina.

Abstract: A process for the preparation of an amorphous mesoporous and macroporous alumina: at least once dissolving an acidic precursor of aluminium, adjusting pH by adding at least one basic precursor to the suspension obtained in a), co-precipitation of the suspension obtained from b) by adding at least one basic precursor and at least one acidic precursor to the suspension, filtration, drying, shaping and heat treatment. An amorphous mesoporous and macroporous alumina with bimodal pore structure: a specific surface area SBET more than 100 m2/g; a median mesopore diameter, by volume determined by mercury intrusion porosimetry, 18 nm or more; a median macropore diameter, by volume determined by mercury intrusion porosimetry, 100 to 1200 nm, limits included; a mesopore volume, as measured by mercury intrusion porosimetry, 0.7 mL/g or more; and a total pore volume, as measured by mercury porosimetry, 0.8 mL/g or more.

Abstract: A novel alumina gel is described having an elevated dispersibility index, and in particular a dispersibility index greater than 70%, a crystallite size between 1 and 35 nm, and a sulphur content between 0.001% and 2% by weight, and a sodium content between 0.001% and 2% by weight, the weight percentages being expressed in relation to the total mass of alumina gel. The present invention also discloses the method for preparing said gel comprising at least one step of precipitating at least one aluminium salt, at least one step of heating the suspension obtained and a final heat treatment step for forming the alumina gel.

Abstract: An amorphous mesoporous alumina with a median mesopore diameter by volume of 16 nm or more, a mesopore volume of 0.5 mL/g or more, and a total pore volume of more than 0.75 mL/g. A process for preparing said alumina, comprising: a) precipitating a basic precursor and an acidic precursor, at least one of which comprises aluminum, at a pH of 8.5 to 10.5, a temperature of 20° C. to 90° C. and for 2 minutes to 30 minutes, with a state of advance of 5% to 13%; b) heating the suspension; c) a second precipitating by adding another basic precursor and acidic precursor, at least one of which comprises aluminum, at a pH of 8.5 to 10.5, a temperature of 40° C. to 90° C. and for 2 to 50 minutes, with a state of advance of 87% to 95%; d) filtration; e) drying; f) shaping; g) heat treatment.

Abstract: The invention concerns a process for the preparation of an amorphous mesoporous and macroporous alumina, comprising at least one step for dissolving an acidic precursor of aluminium, a step for adjusting the pH by adding at least one basic precursor to the suspension obtained in step a), a step for co-precipitation of the suspension obtained at the end of step b) by adding at least one basic precursor and at least one acidic precursor to the suspension, a filtration step, a drying step, a shaping step and a heat treatment step. The invention also concerns an amorphous mesoporous and macroporous alumina with a bimodal pore structure having: a specific surface area SBET of more than 100 m2/g; a median mesopore diameter, by volume determined by mercury intrusion porosimetry, of 18 nm or more; a median macropore diameter, by volume determined by mercury intrusion porosimetry, in the range 100 to 1200 nm, limits included; a mesopore volume, as measured by mercury intrusion porosimetry, of 0.

Abstract: An amorphous mesoporous alumina having a connectivity (Z) greater than 2.7 is described. The present invention also relates to the process for preparing the said alumina, comprising at least one precipitation step of at least one aluminium salt, at least one heating step of the suspension obtained, a thermal treatment step to form the alumina gel, a gentle drying step or spray drying step, a moulding step of the powder obtained, and a final thermal treatment step in order to obtain the alumina.

Abstract: A novel alumina gel is described having an elevated dispersibility index, and in particular a dispersibility index greater than 70%, a crystallite size between 1 and 35 nm, and a sulphur content between 0.001% and 2% by weight, and a sodium content between 0.001% and 2% by weight, the weight percentages being expressed in relation to the total mass of alumina gel. The present invention also discloses the method for preparing said gel comprising at least one step of precipitating at least one aluminium salt, at least one step of heating the suspension obtained and a final heat treatment step for forming the alumina gel.

Abstract: An amorphous mesoporous alumina with a median mesopore diameter by volume of 16 nm or more, a mesopore volume of 0.5 mL/g or more, and a total pore volume of more than 0.75 mL/g. A process for preparing said alumina, comprising: a) precipitating a basic precursor and an acidic precursor, at least one of which comprises aluminium, at a pH of 8.5 to 10.5, a temperature of 20° C. to 90° C. and for 2 minutes to 30 minutes, with a state of advance of 5% to 13%; b) heating the suspension; c) a second precipitating by adding another basic precursor and acidic precursor, at least one of which comprises aluminium, at a pH of 8.5 to 10.5, a temperature of 40° C. to 90° C. and for 2 to 50 minutes, with a state of advance of 87% to 95%; d) filtration; e) drying; f) shaping; g) heat treatment.