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CN-122003294-A - Carbonaceous material, method for producing same, adsorption filter, water purifier cartridge, water purifier, and water purification device

CN122003294ACN 122003294 ACN122003294 ACN 122003294ACN-122003294-A

Abstract

In the carbonaceous material of the invention, the pore volume of 0.70nm or less per 1g of carbonaceous material calculated by QSDFT method based on nitrogen adsorption isotherm is 0.16cm 3 /g or more and 0.30cm 3 /g or less, the iodine adsorption amount is 750mg/g or more and 1340mg/g or less, the active black 5 value is 6.0g/L or more and 30.0g/L or less, and the specific surface area determined by BET method based on N 2 adsorption isotherm at-196 ℃ is 610m 2 /g or more and 1400m 2 /g or less.

Inventors

  • CHISHIRO TAKEFUMI
  • FUJII NORIKO
  • SEIKE NAOYA
  • UEDA TAKASHI
  • XIAO LINLING
  • ASADA TAKUYA

Assignees

  • 大阪燃气化学株式会社

Dates

Publication Date
20260508
Application Date
20241127
Priority Date
20231129

Claims (12)

  1. 1. A carbonaceous material, characterized in that: Pore volume of 0.70nm or less per 1g of carbonaceous material calculated by QSDFT method based on nitrogen adsorption isotherm is 0.16cm 3 /g or more and 0.30cm 3 /g or less, iodine adsorption amount is 750mg/g or more and 1340mg/g or less, active black 5 value is 6.0g/L or more and 30.0g/L or less, and specific surface area determined by BET method based on N 2 adsorption isotherm at-196 ℃ is 610m 2 /g or more and 1400m 2 /g or less.
  2. 2. The carbonaceous material according to claim 1, wherein: the ratio (A/B) of the pore volume (A) of 1.00nm or less in pore diameter per 1g of carbonaceous material calculated by QSDFT method based on nitrogen adsorption isotherm to the pore volume (B) of mesopores obtained by BJH method based on N 2 adsorption isotherm at-196 ℃ is 3.0 to 8.0.
  3. 3. The carbonaceous material according to claim 1, wherein: the mesoporous volume, as determined by BJH method based on N 2 adsorption isotherm at-196 ℃, is 0.030cm 3 /g or more and 0.140cm 3 /g or less.
  4. 4. The carbonaceous material according to claim 1, wherein: the packing density measured by the tap method is 0.36g/mL or more and 0.60g/mL or less.
  5. 5. The carbonaceous material according to any one of claims 1 to 4, wherein: In water, the carbonaceous material is used at least for removing chloroform and anionic surfactant.
  6. 6. A method for producing a carbonaceous material, characterized by: the carbonaceous material according to any one of claim 1 to 4, The method comprises a carbonization step for carbonizing a raw material to obtain a carbide, and an activation step for activating the carbide to obtain an activated product.
  7. 7. The manufacturing method according to claim 6, characterized in that: the manufacturing method further comprises a cleaning step of cleaning the activated product.
  8. 8. The manufacturing method according to claim 6, characterized in that: The raw material is coconut shell.
  9. 9. An adsorption filter, characterized in that: the adsorption filter comprising the carbonaceous material of any one of claims 1 to 4.
  10. 10. A water purifier filter element, characterized in that: The water purifier cartridge comprising the carbonaceous material of any one of claims 1 to 4.
  11. 11. A water purifier, characterized in that: The water purifier comprises the carbonaceous material of any one of claims 1 to 4.
  12. 12. A water purification apparatus, characterized in that: the water purification apparatus comprising the carbonaceous material of any one of claims 1 to 4.

Description

Carbonaceous material, method for producing same, adsorption filter, water purifier cartridge, water purifier, and water purification device Technical Field The invention relates to a carbonaceous material, a manufacturing method thereof, an adsorption filter, a water purifier filter element, a water purifier and water purifying equipment. Background Household water purifiers are widely used to remove harmful substances in tap water. Among such harmful substances, volatile organic compounds such as trihalomethane represented by chloroform contained in a small amount in tap water and harmful substances such as mold smell represented by 2-methyl isobornyl alcohol (2-MIB) are designated as removal target substances in the household quality identification method of household water purifiers, and it is desired to remove them from tap water. In order to remove such harmful substances, carbonaceous materials are generally used in household water purifiers. As such a carbonaceous material, for example, patent document 1 describes a carbonaceous material having a benzene adsorption amount of 25% or more and 40% or less, a vitamin B12 adsorption amount of 13.0mg/g or more and 50.0mg/g or less, and a mesoporous pore volume calculated by the BJH (Barrett-Joyner-Halenda) method based on a nitrogen adsorption isotherm of 0.070cm 3/g or more and 0.150cm 3/g or less. Prior art literature Patent literature Patent document 1 International publication No. 2020/218370 Disclosure of Invention Technical problem to be solved by the invention However, the pore volume and specific surface area of the carbonaceous material described in patent document 1 are designed so that 2-MIB and the like having a relatively large molecular size can be removed, but not trihalomethane and the like typified by chloroform having a relatively small molecular size. Therefore, although the filtering capability value is high for 2-MIB and the like, removal of substances having relatively small molecular sizes such as trihalomethane and the like is difficult, and removal of chloroform having smaller molecular sizes in trihalomethane is very difficult. In addition, in 2019, the JIS test method for household water purifiers was revised, and in the new Japanese Industrial Standard JIS 3201:2019, five removal target substances were added. Accordingly, a household water purifier capable of removing a greater variety of harmful substances than ever before is desired. Among the five removal target substances added, the anionic surfactant has a larger molecular size than 2-MIB. The pore volume and specific surface area of the carbonaceous material used in the conventional household water purifier are designed to have a molecular size suitable for removing about 2-MIB as in patent document 1. Therefore, it is difficult to remove harmful substances having a larger molecular size such as anionic surfactants from the conventional carbonaceous material. As described above, after the revision of the JIS test method, carbonaceous materials for household water purifiers are required to be capable of removing harmful substances ranging from chloroform or the like having a relatively small molecular size to anionic surfactants or the like having a relatively large molecular size with equivalent performance. The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a carbonaceous material, a method for producing the same, an adsorption filter, a water purifier cartridge, a water purifier, and a water purifying apparatus, which can remove a wide range of harmful substances ranging from chloroform and the like having a relatively small molecular size to anionic surfactants and the like having a relatively large molecular size with equivalent performance. Technical solution for solving the technical problems The present inventors have conducted intensive studies to achieve the above object, and as a result, have found that carbonaceous materials having a pore volume, an iodine adsorption amount and an active black 5 value in specific ranges can remove harmful substances ranging from chloroform and the like having a relatively small molecular size to anionic surfactants and the like having a relatively large molecular size with equivalent performance, and have finally completed the present invention. The present invention includes the following embodiments. [1] A carbonaceous material having a pore volume of 0.70nm or less, a pore volume of 0.16cm 3/g or more and 0.30cm 3/g or less, an iodine adsorption amount of 750mg/g or more and 1340mg/g or less, an active black 5 value of 6.0g/L or more and 30.0g/L or less, calculated by QSDFT (Quenched Solid Density Functional Theory) method based on nitrogen adsorption isotherm, and a specific surface area of 610m 2/g or more and 1400m 2/g or less, calculated by BET (Brunauer-Emmett-Teller) method based on N 2 adsorption isotherm at-196 ℃. [2] The carbonaceous materi