EP3509739A1 - Adsorbant comprenant un hydroxyde double lamellaire et du charbon actif - Google Patents

Adsorbant comprenant un hydroxyde double lamellaire et du charbon actif

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Publication number
EP3509739A1
EP3509739A1 EP17752153.1A EP17752153A EP3509739A1 EP 3509739 A1 EP3509739 A1 EP 3509739A1 EP 17752153 A EP17752153 A EP 17752153A EP 3509739 A1 EP3509739 A1 EP 3509739A1
Authority
EP
European Patent Office
Prior art keywords
activated carbon
ldh
powder activated
composite
dispersion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17752153.1A
Other languages
German (de)
English (en)
Inventor
Amitava Pramanik
Somnath Das
Priyanka SARKAR
Shanthi APPAVOO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Publication of EP3509739A1 publication Critical patent/EP3509739A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/041—Oxides or hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • B01J20/28064—Surface area, e.g. B.E.T specific surface area being in the range 500-1000 m2/g
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3071—Washing or leaching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/306—Organic sulfur compounds, e.g. mercaptans

Definitions

  • the present invention relates to adsorbents.
  • the present invention relates to composite absorbents suitable for adsorption of volatile sulphurous compounds.
  • Activated carbon and layered double hydroxide are widely used as adsorbents, albeit for adsorbing different kinds of materials. Controlling the kinetics of adsorption and the release of highly volatile compounds is a technical problem. Carbon, being one of the high surface area materials, is known for its ability to adsorb and release volatile compounds. However, an admixture of carbon and metallic hydroxides/ oxides or other inorganic adsorbents do not show significantly enhanced adsorption characteristics. It is difficult to synthesize such compounds by a chemically benign route and template synthesis often results in higher cost of the products but lower yields. Layered double hydroxides (LDH) are usually synthesized by co-precipitation process.
  • an aqueous solution of metal ions and an alkali are mixed in a pool of water under stirring.
  • the reaction is sometimes carried out under elevated temperature to improve crystallinity and size of the particles. Nevertheless, the particles synthesized by this process have significantly larger size, usually micron size.
  • US4458030 A discloses an adsorbent composition comprising a combination a hydrotalcite and activated carbon.
  • the composition adsorbs variety of substances.
  • the adsorption capacity is not an additive effect of the capacity of the individual ingredients.
  • the activated carbon may be powdered or granular.
  • the composite is produced by admixture of the ingredients by mixing the powders with a suitable binder such as water and polyvinyl alcohol, and the mixture is kneaded and molded.
  • the mixture can be molded into any desired shape such as hollow cylinder, sphere, solid cylinder or polygonal prism having diameter of 1 to 50 mm, and it is thereafter dried and calcined.
  • US2013/0316898 AA discloses a composite adsorbent material, and in particular, a highly porous carbon-based composite material for adsorption and stabilisation of inorganic substances.
  • the composite adsorbent material comprises a porous carbon carrier matrix and an adsorbent species, wherein the adsorbent species is precipitated within the pores of the carrier matrix.
  • the invention extends to various uses of such adsorbent materials, for example in water purification, recovery of metals from waste streams and remediation applications, and where the adsorbent material is amended into soil for the purpose of breaking pollutant-receptor linkages.
  • anabsorbent with very high surface area which is suitable for volatile compounds, can be obtained by growing nanoparticles of layered double hydroxide (LDH) on the surface of powder activated carbon (PAC) by a hydrothermal process.
  • LDH layered double hydroxide
  • PAC powder activated carbon
  • a composite adsorbent comprising nanoparticles of a layered double hydroxide (LDH) and a powder activated carbon (PAC) of the general formula [M 2+ i -x M 3+ x (OH) 2 ] q+ (X n -) q /n-yH20, in which,
  • n 1 to 4.
  • X anions selected from halides, sulphates, nitrates, carbonates or anionic moiety from organic sources
  • said composite is obtainable by a hydrothermal process comprising, in sequence, the steps of:
  • step (b) adding an alkali to the dispersion of step (a);
  • step (c) aging the dispersion of step (b) by heating it to 80 to 100 °C;
  • a hydrothermal process for preparing a composite adsorbent comprising nanoparticles of a layered double hydroxide (LDH) and a powder activated carbon (PAC) of the general formula [M 2+ i- x M 3+ x (OH) 2 ] + (X n" ) q /n-yH 2 0, in which,
  • M 2+ Ca 2+ , Mg 2+ , Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ or Zn 2+ ;
  • M 3+ Al 3+ or Fe 3+ ;
  • n 1 to 4.
  • X anions selected from halides, sulphates, nitrates, carbonates or anionic moiety from organic sources comprising, in sequence, the steps of:
  • step (b) adding an alkali to the dispersion of step (a);
  • step (c) aging the dispersion of step (b) by heating it to 80 to 100 °C;
  • LDH layered double hydroxide
  • PAC powder activated carbon
  • M 2+ Ca 2+ , Mg 2+ , Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ or Zn 2+ ;
  • M 3+ Al 3+ or Fe 3+ ;
  • n 1 to 4.
  • X anions selected from halides, sulphates, nitrates, carbonates or anionic moiety from organic sources
  • amount of nanoparticles of said layered double hydroxide (LDH) is 10 to 30% by weight and wherein particle size of said powder activated carbon is 50 ⁇ to 500 ⁇ .
  • the invention provides a composite adsorbent comprising nanoparticles of a layered double hydroxide (LDH) and a powder activated carbon (PAC), obtainable by a hydrothermal process.
  • LDH layered double hydroxide
  • PAC powder activated carbon
  • Hydrothermal process involves the combined effect of water and pressure on the functionality of the crystals which get synthesized. Thus, it is pertinent to use aqueous systems for such synthesis. This process is generally preferred over other standard techniques for obtaining materials with high crystallinity and purity.
  • the hydrothermal process ensures that the particle size is significantly lower (in nanoscale dimension).
  • the nano particulate LDH is amenable to form cluster aggregates, which could eventually impact the effective surface area of the material.
  • the powder activated carbon (PAC) acts as a carrier/ spacer on which the nanometer sized particles of LDH are grown by hydrothermal process. This ensures that aggregates are formed in minimal quantity.
  • the process ensures uniform coverage of the LDH on the carbon particles, thereby resulting in a composite which has high affinity for odorous compounds, in particular sulphurous compounds.
  • the hydrothermal synthesis begins with contacting, and mixing, powder activated carbon with a water soluble salt of M 2+ and a water soluble salt of M 3+ .
  • PAC is soaked in a solution of a mixture of a salt containing a trivalent metal ion and a salt containing a bivalent metal ion for at least four hours to ensure near complete adsorption of metal ions in the carbon matrix and the dispersion is further mixed for at least two hours, preferably using a sonicator.
  • the molar ratio of the trivalent metal ion to the bivalent metal ion of the layered double hydroxide is 1 :2 to 1 :4, more preferably 1 :3.
  • step (b) an alkali is added to the dispersion of step (a).
  • a solution of an alkali is added to the dispersion until pH of the dispersion increases to 10 and then it is stirred vigorously for about fifteen minutes in a stirrer, preferably a magnetic stirrer at 800 to 1000 RPM till the mixture converts from gelatinous state to powdery dispersion in water.
  • a stirrer preferably a magnetic stirrer at 800 to 1000 RPM till the mixture converts from gelatinous state to powdery dispersion in water.
  • the alkali is a mixture of sodium hydroxide and sodium carbonate. It is further preferred that molarity of sodium hydroxide is about4M and that of sodium carbonate is 15M.
  • step (b) the dispersion of step (b) is aged by heating it to 80 to 100 °C, preferably for about 24 hours.
  • the total volume of the aqueous mixture is maintained between 70 ml to 150 ml.
  • Some residual head space is necessary for generation of water vapor which exerts pressure in the confined environment.
  • the pressure exerted by the water vapor in such a system at about 100 °C is between 1 and 2 bar.
  • the aqueous phase of the dispersion is separated from the dispersed phase by any means such as simple filtration under vacuum using a filter medium like a cloth or filter paper; and the dispersed phase is washed thoroughly with water, preferably distilled, to remove excess alkali, to get the composite adsorbent. It is preferred that before employing any means of separation, the dispersion is cooled to room temperature (about 25 °C). The composite material thus obtained is dried in air oven, for example at 80 ° C for 24 hours.
  • the composite may optionally be calcined.
  • the bivalent metal of the LDH is Mg 2+ , Cu 2+ or Zn 2+ , more preferably Mg 2+ or Zn 2+ .
  • the amount of nanoparticles of the layered double hydroxide (LDH) is 10 to 20 % by weight of the composite material, more preferably 10% by weight of the composite material.
  • the amount of PAC is 70 to 90 % by weight of the composite material, preferably 80 to 90 % by weight, and most preferably 90 % by weight of the composite material.
  • pore size of the powder activated carbon (PAC) is 1000A to 2000A.
  • the particle size of the powder activated carbon is 50 ⁇ to 500 ⁇ , more preferably 50 m to 300 ⁇ .
  • surface area of the composite material is 750 to 1000 m 2 /g.
  • the term surface area means the BET surface area which may be determined by any standard measurement technique known in the art.
  • the composite adsorbent material contains 10% by weight layered double hydroxide and 90 % by weight powder activated carbon.
  • PAC was soaked in 50 ml of an aqueous solution of a mixture of aluminium nitrate (0.033mole) and zinc nitrate (0.1 mole) at molar ratio of 3:1 , sonicated for four hours and allowed to stand overnight. This formed a dispersion.
  • the dispersion was transferred to a 250-ml stoppered bottle and an alkaline aqueous solution of a mixture of sodium hydroxide and sodium carbonate (4M sodium hydroxide and 1 .5M sodium carbonate was added until the pH reached 10.
  • the dispersion was mixed vigorously for fifteen minutes under magnetic stirring at 800 to 1000 RPM.
  • the bottle was stoppered tightly to avoid leakage of air and the bottle was kept for 24 hours inside an air oven set at 85 ° C. Total volume of the aqueous mixture inside the 250-ml stoppered bottle was maintained between 70 ml to 150 ml, leaving enough head space for generation of water vapor which exerted pressure the confined environment.
  • the contents of the bottle were cooled to room temperature (25°C) and filtered using a Whatman® 42 filter paper under vacuum. The particles (of the dispersed phase) were washed thoroughly using distilled water. The composite material thus obtained was air dried at 80°C for 24 hours.
  • Some more composite adsorbent materials were synthesized by varying the proportions of PAC and LDH . All materials thus synthesized were subjected to tests in which HS-GC technique was used to determine the affinity of the materials towards volatile malodorous gases.
  • a few admixtures i.e., simple physical mixtures
  • LDH and PAC were prepared in a typical reaction system in which 'x' g of synthesized LDH was mixed with (100-x) g of powder activated carbon.
  • the value of x is from 10 to 40. The two were mixed by swirling assisted by a stirrer, followed by vortexing for about five minutes.
  • Carrier gas Helium (1 mL/minute)
  • Thermostat condition Temperature 40 °C; Incubation time 10 minute
  • Example 1 Comparison of efficacy of composites with admixtures
  • One aim of this experiment was to determine the affinity of composites made in accordance with the invention towards sulphur based volatile malodorous compounds (by adsorption). Another aim was to compare the affinity with that of mere admixtures of the ingredients, LDH and PAC.
  • the volatile compounds were dimethyl disulphide (CH3)2S and diethyl disulphide (C2H 5 )2S). They are primarily responsible for toilet malodour and bad breath.
  • Head Space-Gas Chromatography technique (HS-GC) was used to measure the concentration of these volatile compounds, which was found by determining the area under the peak (peak area).
  • a material with more affinity (adsorptivity) for the malodorous compounds would adsorb more of the volatile compounds. That would lower the head-space concentration of the malodourous compounds, which in turn would manifest itself in the form of a lower area under the peak. Conversely, a material with lesser affinity (adsorptivity) for the malodorous compounds would adsorb less of the volatile compounds. That would increase the head-space concentration of the malodourous compounds, which in turn would manifest itself as more area under the peak.
  • Example 1 The results of Example 1 are shown in tabular form in Table 1 .
  • Table 1 The results of Example 1 are shown in tabular form in Table 1 .
  • Example 2 Adsorption capacity of LDH-PAC composite v/s LDH-GAC composite
  • LDH-PAC powder activated carbon
  • the composite of LDH and GAC was prepared by replacing PAC with GAC in the procedure described under the heading of Method in the Examples section.
  • Example 1 (HS-GC) was followed to determine and compare the adsorptivity of both the composites.
  • Example 2 The results of Example 2 are shown in tabular form in Table 2.
  • the process described earlier was employed to prepare various composites within the scope of the present invention.
  • the composites contained varying amounts of LDH and PAC.
  • the porosity of all composites was determined by Mercury Porosimeter (Auto Pore® IV made by Micromeritics USA).
  • Porosity is a measure of how much can a substance adsorb of another substance. More porosity indicates more pores available for adsorbing the other substance. In other words it means that a material with more porosity is more likely to act a better adsorbent than a material with lower porosity.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

La présente invention concerne un matériau qui absorbe des composés volatils, en particulier des composés soufrés. Il s'avère qu'un absorbant de surface de contact élevée approprié pour des composés hautement volatils peut être obtenu par croissance de nanoparticules d'un hydroxyde double lamellaire (LDH) sur la surface de charbon actif en poudre (PAC). L'invention concerne un adsorbant composite comprenant des nanoparticules d'un hydroxyde double lamellaire (LDH) et un charbon actif en poudre (PAC) de formule générale [M2+ i-xM3+ x(OH)2]q + (xn-)q/n.yH2O, dans laquelle M2+ = Ca2 +, Mg2+, Mn2+, Fe2 +, CO2+, Ni2+, Cu2+ ou Zn2+; M 3+ = Al3+ ou Fe3+; x = [M3+]/ [M 3++ M2+]; q = x n = 1 à 4; et, y = nombre de molécules d'eau présentes sur le LDH; x = des anions choisis parmi les halogénures, les sulfates, les nitrates, les carbonates ou une fraction anionique à partir de sources organiques. Ce composite peut être obtenu par un procédé hydrothermique comprenant, en séquence, les étapes consistant à : (a) mettre en contact et mélanger, du charbon actif en poudre avec un sel soluble dans l'eau de M2+ et d'un sel soluble dans l'eau de M 3+; (b) ajouter un alcali à la dispersion de l'étape (a); (c) vieillir la dispersion de l'étape (b) en le chauffant de 80 à 100 °C; (d) séparer, par tout moyen, la phase aqueuse de la dispersion à partir de la phase dispersée; et (e) laver ladite phase dispersée avec de l'eau pour éliminer l'excès d'alcali, afin d'obtenir l'adsorbant composite, la quantité de nanoparticules dudit hydroxyde double lamellaire (LDH) est de 10 à 30 % en poids et la taille des particules dudit charbon actif en poudre est de 50 μm à 500 μm.
EP17752153.1A 2016-09-06 2017-08-21 Adsorbant comprenant un hydroxyde double lamellaire et du charbon actif Withdrawn EP3509739A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16187431 2016-09-06
PCT/EP2017/071010 WO2018046286A1 (fr) 2016-09-06 2017-08-21 Adsorbant comprenant un hydroxyde double lamellaire et du charbon actif

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EP3509739A1 true EP3509739A1 (fr) 2019-07-17

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CN (1) CN109689201A (fr)
WO (1) WO2018046286A1 (fr)

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CN108479700B (zh) * 2018-04-13 2020-10-23 南昌大学 一种用于六价铬和甲基橙共吸附的多孔炭复合材料的制备方法
CN108928874B (zh) * 2018-07-09 2021-07-20 上海纳米技术及应用国家工程研究中心有限公司 改性镁铝无机复合絮凝剂的制备方法及其产品和应用
CN109046245A (zh) * 2018-09-03 2018-12-21 华东交通大学 一种具有双重吸附作用的吸附除磷材料及其制备方法
CN111905687A (zh) * 2019-05-08 2020-11-10 浙江理工大学 一种柔性碳纤维布@CoMnNi多氢氧化物复合材料及其制备方法
CN111905689A (zh) * 2019-05-08 2020-11-10 浙江理工大学 一种柔性玻璃纤维布@FeZn双氢氧化物吸附材料及其制备方法
CN110270364B (zh) * 2019-07-16 2024-05-24 河北工业大学 一种负载型石墨相氮化碳复合材料，制备方法及其应用
CN110394154B (zh) * 2019-08-18 2022-03-22 桂林理工大学 一种毛竹炭/FeMn-LDH复合材料的制备方法及其应用
CN111001375B (zh) * 2019-12-29 2023-03-14 福建工程学院 一种层状双氢氧化物复合吸附材料的制备方法
CN111821959B (zh) * 2020-07-24 2023-03-28 湖北葛店人福药用辅料有限责任公司 一种改性吸附剂、精制油脂及其制备方法
CN112221469A (zh) * 2020-10-26 2021-01-15 成都达奇环境科技有限公司 一种去除水中硝酸盐吸附材料及其制备方法
CN113398936B (zh) * 2021-05-25 2022-09-20 同济大学 一种氧化锌/ZnFe-LDH@生物炭可见光催化剂及其制备方法和应用

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JPS58214338A (ja) 1982-06-04 1983-12-13 Kyowa Chem Ind Co Ltd 複合吸着剤
US20090209418A1 (en) * 2008-02-18 2009-08-20 Nagoya Electrical Educational Foundation Adsorbent and method for manufacturing the same
GB2487760B (en) 2011-02-03 2015-11-18 Univ Surrey Composite adsorbent material
TWI547444B (zh) * 2013-12-19 2016-09-01 財團法人工業技術研究院 電極、具有該電極之裝置及電化學除磷之方法
EP3157872B1 (fr) * 2014-06-18 2018-01-03 Unilever NV Hydroxydes doubles lamellaires pour la purification de l'eau

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WO2018046286A1 (fr) 2018-03-15

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