WO1999012641A1 - Desiccant - Google Patents

Desiccant Download PDF

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Publication number
WO1999012641A1
WO1999012641A1 PCT/NL1998/000498 NL9800498W WO9912641A1 WO 1999012641 A1 WO1999012641 A1 WO 1999012641A1 NL 9800498 W NL9800498 W NL 9800498W WO 9912641 A1 WO9912641 A1 WO 9912641A1
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WO
WIPO (PCT)
Prior art keywords
approx
desiccant
carrier
hygroscopic material
surface area
Prior art date
Application number
PCT/NL1998/000498
Other languages
French (fr)
Inventor
Guennadi Anatolievich Nesterov
Original Assignee
Inalfa Industries B.V.
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 Inalfa Industries B.V. filed Critical Inalfa Industries B.V.
Priority to AU90069/98A priority Critical patent/AU9006998A/en
Priority to EP98941913A priority patent/EP1019187A1/en
Publication of WO1999012641A1 publication Critical patent/WO1999012641A1/en

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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
    • B01J20/28—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
    • B01J20/28078—Pore diameter
    • B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
    • 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
    • B01J20/046—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 containing halogens, e.g. halides
    • 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
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • 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
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • 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
    • B01J20/28054—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
    • B01J20/28061—Surface area, e.g. B.E.T specific surface area being in the range 100-500 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
    • B01J20/28—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
    • B01J20/28069—Pore volume, e.g. total pore volume, mesopore volume, micropore volume
    • 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
    • B01J20/34—Regenerating or reactivating
    • B01J20/3433—Regenerating or reactivating of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425

Definitions

  • the present invention relates to a desiccant comprising a solid, porous carrier with a hygroscopic material impregnated therein, in particular a hygroscopic salt such as a chloride.
  • a desiccant of this kind which may for example be used as an energy storage material in heat pumps or as an absorption or adsorption agent in air conditioning plants, is for example known from Japanese patent applications Nos, 55039240 and 03009767.
  • the object of the present invention is to provide a desiccant which possesses improved absorption characteristics .
  • the desiccant according to the invention is characterized in that the carrier has a surface area of approx. 200 - 350 m 2 /g and/or a pore volume of approx, 0.8 - 1.5 cm 3 /g and/or a pore diameter of approx. 150 - 250 A.
  • a very advantageous embodiment of the desiccant according to the invention is one wherein the hygroscopic material is provided on the carrier in a homogeneous distribution of at least one monomolecular layer.
  • a highly preferred embodiment of the invention is met by a dessiccant as mentioned in the preamble, wherein the carrier has a surface area of approx. 200 - 350 m 2 /g, a pore volume of approx. 0.8 - 1.5 cmVg, and a pore diameter of approx. 150 - 250 A, and wherein the hygroscopic material is provided on the carrier in a substantially homogeneous distribution of at least one monomolecular layer.
  • the material of the carrier itself is not active in the drying process, so that the material of the carrier can be selected entirely on the basis of favourable carrier properties.
  • Possible materials for the carrier comprise silica, alumina, carbon black, paper or the like.
  • the carrier is preferably supplied in the form of particles, in particular spheres having a diameter of approx. 2.5 - 5 mm. Said spheres can be imparted relatively favourable mechanical characteristics, so that particles are obtained which are capable of withstanding a compressive force of 8 kg per particle in a crush test.
  • a porous material also a material formed into a honeycomb structure or the like may be selected, or a porous material which has been formed into a honeycomb structure. The invention will be explained in more detail hereafter by means of a number of examples.
  • Silica having a pore volume of approx. 1.2 cmVg, a surface area of approx. 260 m 2 /g and an average pore diameter of approx. 200 A was selected as the carrier for the desiccant.
  • 1 kg of silica was treated with a solution of 1200 ml of the following composition: 300 g of LiCl, 20 g of Ca(OH) 2 , 15 g of CaCl 2 and 1635 ml of water. After treatment and drying, a desiccant having a bulk density of 0.47 g/cm 3 was obtained.
  • a dynamic absorption test was carried out under the following circumstances. a. the initial weight of the desiccant was 20 g, b.
  • a dynamic absorption test was carried out under the following conditions: a. the initial weight of the desiccant was 4 kg, b. an air flow was led through the desiccant at a flow rate of 137 m 3 /h and an adsorption time of 30 min., c. the desiccant was regenerated at 50 °C for a period of 30 min.
  • the dew point of the exit air was 11 °C.
  • Silica (100 g) having a surface area of approx. 260 m 2 /g, a pore volume of approx. 1.2 cm 3 /g, and an average pore diameter of approx. 200 A was treated with 120 ml of a lithium chloride solution (230 g of LiCl in 1635 ml of water) . The material was then regenerated again an impregnated with 120 ml of LiCl (100 g) in 1635 ml of water. With this desiccant the dynamic absorption test described in example 1 resulted in an absorption of approx. 5.5 g of moisture during each cycle.
  • Alumina having a pore volume of approx. 1.0 cm 3 /g, a surface area of approx. 260 m /g and an average pore diameter of approx. 154 A was selected as the carrier for the desiccant.
  • 1 kg of alumina was treated with a solution of 1000 ml of the following composition: 300 g of LiCl, 20 g of CaCl 2 and 1635 ml of water. After treatment and drying a desiccant having a bulk density of 0.49 g/cm 3 was obtained.
  • a static adsorption test showed that the desiccant had a high adsorption capacity, unlike untreated alumina, whose adsorption capacity is only very small.
  • a dynamic absorption test was carried out under the following circumstances. a. the initial weight of the desiccant was 20 g, b. an air flow was led through the desiccant at a flow rate of 1.48 m 3 /h, an air inlet temperature of Tiniet - 15 °C and a relative air humidity at the inlet of 80%, c. the desiccant was regenerated at 100 °C with an air flow of 20 m 3 /h for 15 minutes.
  • the desiccant can be said to exhibit the following advantageous characteristics:
  • C the capacity to produce an air flow having any relative humidity (20 - 95%) during a regeneration process
  • D a small bulk density
  • said desiccant could be used in the following devices: airconditioning plants for utilising waste energy (supermarkets, offices and the like) , airconditioning plants for passenger cars, caravans and the like, as a desiccant for the atmospheric treatment and pressure treatment of air, as an agent for producing air having a specified relative humidity, as a material in a heat pump, and as an energy storage material.

Abstract

A dessicant comprises a solid, porous carrier of for example silica, alumina, carbon black, paper or the like with a hygroscopic material, in particular a hygroscopic salt such as a chloride, impregnated therein. The hygroscopic material is provided on the carrier in a homogeneous distribution of at least one monomolecular layer. The carrier has a surface area of approx. 200 - 350 m2/g and/or a pore volume of approx. 0.8 - 1.5 cm3/g and/or a pore diameter of approx. 150 - 250 Å. This results in a desiccant having very good adsorption characteristics.

Description

Desiccant
The present invention relates to a desiccant comprising a solid, porous carrier with a hygroscopic material impregnated therein, in particular a hygroscopic salt such as a chloride. A desiccant of this kind, which may for example be used as an energy storage material in heat pumps or as an absorption or adsorption agent in air conditioning plants, is for example known from Japanese patent applications Nos, 55039240 and 03009767. The object of the present invention is to provide a desiccant which possesses improved absorption characteristics .
In order to accomplish that objective the desiccant according to the invention is characterized in that the carrier has a surface area of approx. 200 - 350 m2/g and/or a pore volume of approx, 0.8 - 1.5 cm3/g and/or a pore diameter of approx. 150 - 250 A.
Surprisingly it has become apparent that a desiccant comprising such a carrier has very good drying characteristics. The surface area and the pore volume provide a large moisture absorption capacity, whilst a relatively large pore diameter ensures that the moisture absorbed in the pores can be delivered relatively easily again, without any clogging of the pores and without capillary forces preventing the moisture exiting from the pores. The most favourable characteristics are obtained when all the above requirements are met, but favourable characteristics are also obtained when said requirements are met in part, A very advantageous embodiment of the desiccant according to the invention is one wherein the hygroscopic material is provided on the carrier in a homogeneous distribution of at least one monomolecular layer. Therefore, a highly preferred embodiment of the invention is met by a dessiccant as mentioned in the preamble, wherein the carrier has a surface area of approx. 200 - 350 m2/g, a pore volume of approx. 0.8 - 1.5 cmVg, and a pore diameter of approx. 150 - 250 A, and wherein the hygroscopic material is provided on the carrier in a substantially homogeneous distribution of at least one monomolecular layer.
Because of the substantially complete coating of the carrier with a very thin homogeneous film of a hygroscopic material, the material of the carrier itself is not active in the drying process, so that the material of the carrier can be selected entirely on the basis of favourable carrier properties. Possible materials for the carrier comprise silica, alumina, carbon black, paper or the like. The carrier is preferably supplied in the form of particles, in particular spheres having a diameter of approx. 2.5 - 5 mm. Said spheres can be imparted relatively favourable mechanical characteristics, so that particles are obtained which are capable of withstanding a compressive force of 8 kg per particle in a crush test. Besides a porous material, also a material formed into a honeycomb structure or the like may be selected, or a porous material which has been formed into a honeycomb structure. The invention will be explained in more detail hereafter by means of a number of examples.
EXAMPLE 1
Silica having a pore volume of approx. 1.2 cmVg, a surface area of approx. 260 m2/g and an average pore diameter of approx. 200 A was selected as the carrier for the desiccant. 1 kg of silica was treated with a solution of 1200 ml of the following composition: 300 g of LiCl, 20 g of Ca(OH)2, 15 g of CaCl2 and 1635 ml of water. After treatment and drying, a desiccant having a bulk density of 0.47 g/cm3 was obtained. A dynamic absorption test was carried out under the following circumstances. a. the initial weight of the desiccant was 20 g, b. an air flow was led through the desiccant at a flow rate of 1.48 m3/h, an air inlet temperature of Tinιet = 15 °C and a relative air humidity at the inlet of 80 %, c. the desiccant was regenerated at 100 °C with an air flow of 20 m3/h for 15 minutes.
From the test it became apparent that the desiccant absorbed 5.0 g of moisture during every cycle.
Also a dew point measurement produced favourable results. When using this desiccant and a regeneration temperature of 80 °C, exit air having a dew point of D.P. = -10 °C was obtained from air having a temperature of T = 17 °C and a dew point of D.P. = 11 °C at the inlet. When using this desiccant and a regeneration temperature of 70 °C, exit air having a dew point of D.P. = -3 °C was obtained from inlet air having a temperature of T = 22 °C and a dew point of D.P. = 12 °C. The above desiccant was also tested in a much larger quantity.
A dynamic absorption test was carried out under the following conditions: a. the initial weight of the desiccant was 4 kg, b. an air flow was led through the desiccant at a flow rate of 137 m3/h and an adsorption time of 30 min., c. the desiccant was regenerated at 50 °C for a period of 30 min.
The dew point of the exit air was 11 °C.
EXAMPLE 2
100 g of silica having a surface area of approx. 260 m /g, a pore volume of approx. 1.2 cm3/g, and an average pore diameter of approx. 200 A was treated with 120 ml of an aqueous solution of Na2Si03-9H20 (250 g in 2000 ml of water), and subsequently dried. The dried material was then treated with an aqueous solution of LiCl (330 g of LiCl in 1635 ml of water) and regenerated. The desiccant appeared to possess a high absorption capacity, whilst the active constituent could not be removed under mild conditions (temperature 20 - 100 °C and a relative humidity of up to 100%) . The results were comparable with those of the first example.
EXAMPLE 3
Silica (100 g) having a surface area of approx. 260 m2/g, a pore volume of approx. 1.2 cm3/g, and an average pore diameter of approx. 200 A was treated with 120 ml of a lithium chloride solution (230 g of LiCl in 1635 ml of water) . The material was then regenerated again an impregnated with 120 ml of LiCl (100 g) in 1635 ml of water. With this desiccant the dynamic absorption test described in example 1 resulted in an absorption of approx. 5.5 g of moisture during each cycle. A dew point measurement showed that when this desiccant and a regeneration temperature of 80 °C were used, exit air having a dew point of D.P. = -12 °C was obtained from inlet air of T = 17 °C and D.P. = 11 °C.
EXAMPLE 4
Alumina having a pore volume of approx. 1.0 cm3/g, a surface area of approx. 260 m /g and an average pore diameter of approx. 154 A was selected as the carrier for the desiccant. 1 kg of alumina was treated with a solution of 1000 ml of the following composition: 300 g of LiCl, 20 g of CaCl2 and 1635 ml of water. After treatment and drying a desiccant having a bulk density of 0.49 g/cm3 was obtained. A static adsorption test showed that the desiccant had a high adsorption capacity, unlike untreated alumina, whose adsorption capacity is only very small.
A dynamic absorption test was carried out under the following circumstances. a. the initial weight of the desiccant was 20 g, b. an air flow was led through the desiccant at a flow rate of 1.48 m3/h, an air inlet temperature of Tiniet - 15 °C and a relative air humidity at the inlet of 80%, c. the desiccant was regenerated at 100 °C with an air flow of 20 m3/h for 15 minutes.
From the test it became apparent that the desiccant absorbed 4.8 g of moisture during every cycle.
Also a dew point measurement produced favourable results. When using this desiccant and a regeneration temperature of 80°C, exit air having a dew point of D.P. =
-9 °C was obtained from air having a temperature of T = 17 °C and a dew point of D.P. = 11 °C at the inlet. When using this desiccant and a regeneration temperature of 70 °C, exit air having a dew point of D.P. = -2 °C was obtained from inlet air having a temperature of T = 22 °C and a dew point of D.P. = 12 °C.
Summarising the above, the desiccant can be said to exhibit the following advantageous characteristics:
A. a high static and dynamic adsorption capacity of up to 1.3 g of moisture per 1 g of desiccant;
B. a low regeneration temperature (up to 35 - 40 °C) combined with a high adsorption capacity;
C. the capacity to produce an air flow having any relative humidity (20 - 95%) during a regeneration process; D. a small bulk density;
E. a good resistance against washing out of the active components .
In view of the characteristics of the desiccant according to the invention, said desiccant could be used in the following devices: airconditioning plants for utilising waste energy (supermarkets, offices and the like) , airconditioning plants for passenger cars, caravans and the like, as a desiccant for the atmospheric treatment and pressure treatment of air, as an agent for producing air having a specified relative humidity, as a material in a heat pump, and as an energy storage material.
The invention is not limited to the above-described embodiments, which can be varied in various ways within the scope of the invention.

Claims

1. A desiccant comprising a solid, porous carrier with a hygroscopic material, in particular a hygroscopic salt such as a chloride, impregnated therein, characterized in that said carrier has a surface area of approx. 200 - 350 m2/g and/or a pore volume of approx. 0.8 - 1.5 cm3/g, and/or a pore diameter of approx. 150 - 250 A.
2. A desiccant according to claim 1, wherein said hygroscopic material is provided on the carrier in a substantially homogeneous distribution of at least one monomolecular layer.
3. A desiccant according to claim 1 or 2, wherein said carrier is made of silica, alumina, carbon black, paper or the like.
4. A desiccant according to any one of the preceding claims, wherein said carrier has a surface area of approx.
250 - 350 m2/g, a pore volume of approx. 1.2 - 1.5 cm3/g and a pore diameter of approx. 150 - 250 A.
5. A desiccant comprising a solid, porous carrier with a hygroscopic material, in particular a hygroscopic salt such as a chloride, impregnated therein, characterized in that said carrier has a surface area of approx. 200 - 350 m2/g, a pore volume of approx. 0.8 - 1.5 cmVg, and a pore diameter of approx. 150 - 250 A, and wherein said hygroscopic material is provided on the carrier in a homogeneous distribution of at least one monomolecular layer.
6. A desiccant according to any one of the preceding claims, wherein said carrier is in the form of particles, in particular spheres having a diameter of approx. 2.5 - 5 mm.
7. A desiccant according to any one of the preceding claims, which is intended for use as an absorption agent in an absorption reactor of an airconditioning plant.
8. A desiccant according to any one of the preceding claims, wherein lithium chloride, calcium chloride, sodium silicate or a similar material is selected as the hygroscopic material.
PCT/NL1998/000498 1997-09-08 1998-09-02 Desiccant WO1999012641A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU90069/98A AU9006998A (en) 1997-09-08 1998-09-02 Desiccant
EP98941913A EP1019187A1 (en) 1997-09-08 1998-09-02 Desiccant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1006965A NL1006965C2 (en) 1997-09-08 1997-09-08 Desiccant.
NL1006965 1997-09-08

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Publication Number Publication Date
WO1999012641A1 true WO1999012641A1 (en) 1999-03-18

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NL (1) NL1006965C2 (en)
WO (1) WO1999012641A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9682368B2 (en) 2014-04-29 2017-06-20 Rennovia Inc. Shaped porous carbon products
CN107537290A (en) * 2017-10-16 2018-01-05 王金华 A kind of preparation method of compound-dehumidifying agent
US10464048B2 (en) 2015-10-28 2019-11-05 Archer-Daniels-Midland Company Porous shaped metal-carbon products
US10722867B2 (en) 2015-10-28 2020-07-28 Archer-Daniels-Midland Company Porous shaped carbon products
US11253839B2 (en) 2014-04-29 2022-02-22 Archer-Daniels-Midland Company Shaped porous carbon products
CN114173906A (en) * 2019-05-28 2022-03-11 W.L.戈尔及同仁股份有限公司 Device comprising a contaminant-resistant and non-corrosive desiccant compound having a high moisture capacity

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1740351A (en) * 1924-02-01 1929-12-17 Zh Rikagaku Kenkyujo Dehydrating substance
FR845760A (en) * 1938-05-04 1939-09-01 Process for preparing gas and vapor absorbing bodies
JPS5539240A (en) * 1978-09-11 1980-03-19 Kuraray Co Ltd Hygroscopic agent for drying air
JPS59203637A (en) * 1983-05-06 1984-11-17 Shokubai Kasei Kogyo Kk Moisture absorbent regenerable at low temperature
EP0685257A1 (en) * 1994-06-02 1995-12-06 C. FILIPITSCH & CO. KEG Moisture absorbent material and articles incorporating such material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1740351A (en) * 1924-02-01 1929-12-17 Zh Rikagaku Kenkyujo Dehydrating substance
FR845760A (en) * 1938-05-04 1939-09-01 Process for preparing gas and vapor absorbing bodies
JPS5539240A (en) * 1978-09-11 1980-03-19 Kuraray Co Ltd Hygroscopic agent for drying air
JPS59203637A (en) * 1983-05-06 1984-11-17 Shokubai Kasei Kogyo Kk Moisture absorbent regenerable at low temperature
EP0685257A1 (en) * 1994-06-02 1995-12-06 C. FILIPITSCH & CO. KEG Moisture absorbent material and articles incorporating such material

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 073 (C - 012) 28 May 1980 (1980-05-28) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 071 (C - 272) 30 March 1985 (1985-03-30) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9682368B2 (en) 2014-04-29 2017-06-20 Rennovia Inc. Shaped porous carbon products
US9993802B2 (en) 2014-04-29 2018-06-12 Archer Daniels Midland Company Shaped porous carbon products
US10384192B2 (en) 2014-04-29 2019-08-20 Archer-Daniels-Midland Company Shaped porous carbon products
US10654027B2 (en) 2014-04-29 2020-05-19 Archer-Daniels-Midland Company Shaped porous carbon products
US11253839B2 (en) 2014-04-29 2022-02-22 Archer-Daniels-Midland Company Shaped porous carbon products
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CN107537290A (en) * 2017-10-16 2018-01-05 王金华 A kind of preparation method of compound-dehumidifying agent
CN114173906A (en) * 2019-05-28 2022-03-11 W.L.戈尔及同仁股份有限公司 Device comprising a contaminant-resistant and non-corrosive desiccant compound having a high moisture capacity

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EP1019187A1 (en) 2000-07-19
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