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US 11,655,155 B2Granted
Method for producing activated carbon and activated carbon obtained in this way and use thereof
AssigneeBlücher GmbH
InventorsAntje Modrow, Bertram Böhringer, Jann-Michael Giebelhausen
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Abstract
The invention relates to a method for the production of activated carbon, in particular particulate activated carbon, having an increased mesopore and/or macropore volume fraction, preferably having an increased mesopore volume fraction.
Claims15
A particulate activated carbon having a Gurvich total pore volume including an increased mesopore volume fraction,
- wherein the activated carbon is granular or spherical,
- wherein 60% to 99.5% of the Gurvich total pore volume formed by mesopores is formed by mesopores having pore diameters in the range from 2 nm to 20 nm;
- wherein the activated carbon has an average pore diameter in the range from 3 nm to 20 nm;
- wherein the activated carbon has a Gurvich total pore volume in the range from 0.5 cm3/g to 4 cm3/g;
- wherein the activated carbon has an abrasion resistance of at least 99%, as determined according to modified CEFIC standard;
- wherein the activated carbon has a specific BET surface area in the range from 500 m2/g to 4500 m2/g;
- wherein the activated carbon has an iodine number in the range from 1400 mg/g to 2100 mg/g;
- wherein the activated carbon has a butane adsorption in the range from 35% to 90%;
- and
- wherein the activated carbon has a methylene blue value in the range from 17 ml to 65 ml;
- wherein the activated carbon is obtained by a method, wherein the method comprises the following steps:
- (a) sulfonating a particulate polymeric organic starting material by contacting the starting material with at least one sulfonating agent and subsequently causing to act and reacting the sulfonating agent with the starting material in such a way, namely for a duration in the range of from 0.5 h to 24 h and at temperatures in the range of from 50° C. to 330° C., that the sulfonation takes place with simultaneous volume expansion of the starting material, wherein the volume expansion of the starting material is increased by at least 2%, based on the particle size of the unsulfonated starting material;
- subsequently,
- (b) carbonizing the sulfonated starting material obtained in step (a), then
- (c) activating the carbonized starting material obtained in step (b) to give the activated carbon;
- wherein, before step (b) is carried out, a step of leaving and/or repositing the sulfonated starting material is carried out.
13 more elements
A particulate activated carbon having a Gurvich total pore volume including an increased mesopore volume fraction,
- wherein 60% to 99.5% of the Gurvich total pore volume is formed by mesopores having pore diameters in the range from 2 nm to 20 nm;
- wherein the activated carbon has an average pore diameter in the range from 3 nm to 20 nm;
- wherein the activated carbon has a Gurvich total pore volume in the range from 2 cm3/g to 3 cm3/g;
- wherein the activated carbon has an abrasion resistance of at least 99.5%, as determined according to modified CEFIC standard;
- and
- wherein the activated carbon has a specific BET surface area in the range from 1200 m2/g to 2500 m2/g;
- wherein the activated carbon has an iodine number in the range from 1450 mg/g to 2000 mg/g;
- wherein the activated carbon has a butane adsorption in the range from 45% to 80%;
- and
- wherein the activated carbon has a methylene blue value in the range from 19 ml to 50 ml.
7 more elements
A particulate activated carbon having a Gurvich total pore volume including an increased mesopore volume fraction,
- wherein 60% to 99.5% of the Gurvich total pore volume is formed by mesopores having pore diameters in the range from 2 nm to 20 nm;
- wherein the activated carbon has an average pore diameter in the range from 3 nm to 20 nm;
- wherein the activated carbon has a Gurvich total pore volume in the range from 0.5 cm3/g to 4 cm3/g;
- and
- wherein the activated carbon has an abrasion resistance of at least 98%, as determined according to modified CEFIC standard;
- wherein the activated carbon has a specific BET surface area in the range from 500 m2/g to 4500 m2/g;
- wherein the activated carbon has an iodine number in the range from 1400 mg/g to 2100 mg/g;
- and
- wherein the activated carbon has a butane adsorption in the range from 35% to 90%;
- and
- wherein the activated carbon has a methylene blue value in the range from 17 ml to 65 ml.
8 more elements
Dependencies are inferred from the claim text.