EP0188463A1 - Absorbent clay - Google Patents

Absorbent clay

Info

Publication number
EP0188463A1
EP0188463A1 EP85903187A EP85903187A EP0188463A1 EP 0188463 A1 EP0188463 A1 EP 0188463A1 EP 85903187 A EP85903187 A EP 85903187A EP 85903187 A EP85903187 A EP 85903187A EP 0188463 A1 EP0188463 A1 EP 0188463A1
Authority
EP
European Patent Office
Prior art keywords
pellets
clay
cellulosic material
dust
temperature
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Withdrawn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
EP85903187A
Other languages
German (de)
French (fr)
Other versions
EP0188463A4 (en
Inventor
Cameron Kent Glover
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.)
East West Minerals Nl
Original Assignee
East West Minerals Nl
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 East West Minerals Nl filed Critical East West Minerals Nl
Publication of EP0188463A1 publication Critical patent/EP0188463A1/en
Publication of EP0188463A4 publication Critical patent/EP0188463A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K1/00—Housing animals; Equipment therefor
    • A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
    • A01K1/0152—Litter
    • A01K1/0155—Litter comprising organic material
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K1/00—Housing animals; Equipment therefor
    • A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
    • A01K1/0152—Litter
    • A01K1/0154—Litter comprising inorganic material

Definitions

  • This invention relates to a method of manufacturing an absorbent composition.
  • absorbents are those that are less costly to make, possess a higher absorbency of both hydrophobic and hydrophillic substances and have a lower tendency to form dust. Such absorbents have a wide range of application.
  • U.S. Patent 3,059,615 describes an animal litter manufactured by acidifying cellulosic materials such as corn cob, grits or cereal hulls with a view to rendering the cellulosic material more absorbent.
  • absorbent compositions have been proposed in which absorbent binders such as clays or limestone are combined with fillers available in large quantities at low cost such as rice hulls, corn cobs, flyash, sawdust, peanut hulls, or the like (U.S. Patents 3,735,734, 3,921,581, 3,983,842, 4,258,660).
  • An object of the present invention is to manufacture an absorbent material at low cost by very simple means.
  • Preferred embodiments of the invention are suitable for use as a "pet litter”. Disclosure of the Invention
  • the invention consists in method of manufacture of an absorbent composition comprising the steps of: mixing clay with cellulosic material, pelletizing the mixture, drying the resultant pellets, and heating the pellets to a temperature of from 550°C to 1100°C.
  • Figure 1 is a graph showing the crush strength of pellets of various compositions according to the invention.
  • Figure 2 shows the water absorption of pellets according to the invention.
  • Figure 3 is a graph showing the crushing strength of pellets prepared with the addition of sodium carbonate according to the invention.
  • Figure 4 is a schematic flow chart illustrating a method according to the invention. Description of Preferred Embodiment
  • compositions according to the invention desireably utilize a clay of generally uniform quality as a starting material.
  • the clay is combined with a cellulosic material such as the hulls of the rice grain or rice husks, which are a by-product of rice milling and therefore cheap and readily obtainable or wheat dust or grain dust which are available as low cost waste products.
  • a cellulosic material such as the hulls of the rice grain or rice husks, which are a by-product of rice milling and therefore cheap and readily obtainable or wheat dust or grain dust which are available as low cost waste products.
  • the clay it is preferable to mill the clay to a fine particle size since this facilitates mixing with the rice hulls or wheat dust which are also preferably milled to a fine particle size.
  • Adding the clay and rice or wheat together with water in a pelletizer or agglo erator develops small pellets which can then be dried and baked.
  • the quantity of water added is desireably the minimum required for aggregation.
  • the pellets are subsequently dried and then heated to above 550°C. It is believed that during this step the cellulosic material is not only carbonized but fully combusted.
  • a suitable clay or binder it is preferable to perform tests at first crushing, milling and screening the raw clay; mixing with sufficient water the facilitate agglomeration; agglomeration to form pellets; oven drying at 100°C for one to two hours; firing the pellets at 850°C for say 3 hours in a muffle furnace and then; cooling the pellets.
  • the water absorbency of the resultant milled product is measured and those clays found to have a high percentage of absorption of liquids and a low level of dust after meat treatment are preferred for use in the invention.
  • a white burning clay was milled to a maximum particle size of 300 microns, and rice hulls or wheat dust was milled to a maximum particle size of 150 microns.
  • the clay and the rice hulls or wheat dust were each then mixed in various proportions by mechanical means, about 20% water by weight was added and the resulting mixture formed into pellets of up to 6 mm in diameter by means of an agglomerator or pelletising machine.
  • the pellets were then passed to a dryer which was the first section of a tunnel kiln at a temperature of up to 100 C. Once dried to a moisture content of less than 4% the pellets continued to be passed through the kiln but the temperature of the second section of the kiln was between 800 and 1000°C.
  • the pellets were held in the kiln for about one hour-
  • the ratio of wheat dust to clay and rice hulls to clay was 14:86, 21:79, 28:72 and 35:65 respectively.
  • Calcination temperatures were 800°C, 900°C and 1000°C.
  • the pellets were placed in Gooch crucibles with glass fibre pads.
  • the crucibles were filled with distilled water and the water was allowed to percolate through the pellets. After draining this step was repeated.
  • Table 2 The results of Table 2 are illustrated graphically in Figure 2 which shows the water absorption in grams/100 grams of pellets on the ordinate axis and which shows the percentage by weight of rice hulls (A) or Wheat dust (B) added to the clay on the coordinate axis.
  • the ratio of clay to rice hulls or wheat dust has been varied from between 80%:20% by weight to 60%:40% by weight and particle sizes of clay and rice hulls have been varied between 75 and 600 microns. For finer particle size provides a more effective product but is more costly to obtain.
  • the hardened pellets After drying of the pelletized mixture the hardened pellets have been exposed to kiln temperatures of from 550 to 850°C for from 3 to 1 hours, respectively. Temperatures of up to 1100 C may be employed.
  • the firing temperatures must be high enough to combust all the carbon in the rice hulls or wheat dust.
  • the products were pelletized, dried at 105°C and then calcined at 800, 900 and 1000°C respectively for 2 hrs.
  • Clay is fed from storage hopper 1 to a gravimetric weight belt feeder 5.
  • Wheat dust or rice hulls from a hopper 2 are optionally ground by hammer mill 3 and fed to gravimetric weightbelt feeder 4.
  • nodulizer 6 The weighed, and optionally ground, rice hulls or wheat and clay feedstocks are combined in nodulizer 6 together with water 14 metered via a flowmeter 11.
  • the nodulizer properly incorporates the rice hulls or wheat dust into the clay and water and is preferably a twinshaft paddle mixer.
  • the mixture is then treated in granulation drum 7 pellets or granules which are transferred to a drier 8, for example an "Adelaide Dryer".
  • the dried pellets proceed to calciner 9 which is fueled by a burner 12 boosted by fan 13 and supplied with fuel 15. Exit gas 16 from calciner 9 is used to heat dryer 8.
  • the calcined product passes to cooler 10 prior to packaging.
  • the cooling step is only needed if it is desired to package the product within 24 hrs.
  • Starch or polymer binders and other strengtheners may be added if desired without departing from the invention herein described.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Housing For Livestock And Birds (AREA)

Abstract

Un absorbant qui peut être utilisé comme litière pour animaux domestiques ou comme absorbant de liquides industriels est produit en mélangeant de l'argile avec un matériau cellulosique, tel que des enveloppes de riz ou de froment, en agglomérant le mélange, en séchant les granules résultants et en chauffant les granules jusqu'à une température entre 550oC et 1100oC.An absorbent which can be used as litter for domestic animals or as an absorbent for industrial liquids is produced by mixing clay with a cellulosic material, such as rice or wheat husks, agglomerating the mixture, drying the resulting granules and by heating the granules to a temperature between 550oC and 1100oC.

Description

Title: "ABSORBENT CLAY" Technical Field of the Invention
This invention relates to a method of manufacturing an absorbent composition.
Many different materials are employed to absorb oil spills and chemical wastes, or as carriers for insecticides and also as fillers in rubber products, paints and plastics. The most useful absorbents are those that are less costly to make, possess a higher absorbency of both hydrophobic and hydrophillic substances and have a lower tendency to form dust. Such absorbents have a wide range of application.
An increasing quantity of absorbent materials is used in so-called "Pet Litter" products for absorbing urine and other liquid waste. Background Art
U.S. Patent 3,059,615 describes an animal litter manufactured by acidifying cellulosic materials such as corn cob, grits or cereal hulls with a view to rendering the cellulosic material more absorbent.
A number of absorbent compositions have been proposed in which absorbent binders such as clays or limestone are combined with fillers available in large quantities at low cost such as rice hulls, corn cobs, flyash, sawdust, peanut hulls, or the like (U.S. Patents 3,735,734, 3,921,581, 3,983,842, 4,258,660).
However the products hitherto available have either been more costly or less effective than is desired.
An object of the present invention is to manufacture an absorbent material at low cost by very simple means. Preferred embodiments of the invention are suitable for use as a "pet litter". Disclosure of the Invention
According to one aspect the invention consists in method of manufacture of an absorbent composition comprising the steps of: mixing clay with cellulosic material, pelletizing the mixture, drying the resultant pellets, and heating the pellets to a temperature of from 550°C to 1100°C. Brief Description of the Drawings
Various embodiments of the invention will now be described by way of example only with reference to the accompanying drawings wherein:
Figure 1 is a graph showing the crush strength of pellets of various compositions according to the invention.
Figure 2 shows the water absorption of pellets according to the invention.
Figure 3 is a graph showing the crushing strength of pellets prepared with the addition of sodium carbonate according to the invention. Figure 4 is a schematic flow chart illustrating a method according to the invention. Description of Preferred Embodiment
Compositions according to the invention desireably utilize a clay of generally uniform quality as a starting material.
The clay is combined with a cellulosic material such as the hulls of the rice grain or rice husks, which are a by-product of rice milling and therefore cheap and readily obtainable or wheat dust or grain dust which are available as low cost waste products.
It is preferable to mill the clay to a fine particle size since this facilitates mixing with the rice hulls or wheat dust which are also preferably milled to a fine particle size.
Adding the clay and rice or wheat together with water in a pelletizer or agglo erator develops small pellets which can then be dried and baked. The quantity of water added is desireably the minimum required for aggregation.
The pellets are subsequently dried and then heated to above 550°C. It is believed that during this step the cellulosic material is not only carbonized but fully combusted.
In choosing a suitable clay or binder it is preferable to perform tests at first crushing, milling and screening the raw clay; mixing with sufficient water the facilitate agglomeration; agglomeration to form pellets; oven drying at 100°C for one to two hours; firing the pellets at 850°C for say 3 hours in a muffle furnace and then; cooling the pellets. The water absorbency of the resultant milled product is measured and those clays found to have a high percentage of absorption of liquids and a low level of dust after meat treatment are preferred for use in the invention.
The following examples of various embodiments of the invention will better describe the invention.
In one series of examples a white burning clay was milled to a maximum particle size of 300 microns, and rice hulls or wheat dust was milled to a maximum particle size of 150 microns. The clay and the rice hulls or wheat dust were each then mixed in various proportions by mechanical means, about 20% water by weight was added and the resulting mixture formed into pellets of up to 6 mm in diameter by means of an agglomerator or pelletising machine. The pellets were then passed to a dryer which was the first section of a tunnel kiln at a temperature of up to 100 C. Once dried to a moisture content of less than 4% the pellets continued to be passed through the kiln but the temperature of the second section of the kiln was between 800 and 1000°C. The pellets were held in the kiln for about one hour-
The ratio of wheat dust to clay and rice hulls to clay was 14:86, 21:79, 28:72 and 35:65 respectively. Calcination temperatures were 800°C, 900°C and 1000°C.
To determine the tendency to form dust, crushing tests were conducted by individually subjecting the pellets to a force applied by metal plunger with the results shown in Table I.
TABLE I
TYPE OF ADDITIVE RICE HULLS WHEAT DUST
A B
ADDITIVE % 14 21 28 35 14 21 28 35
CLAY % 86 79 72 65 86 79 72 65
MEAN CRUSHING STRENGTH OF GRANULE
(grams/2imm pellet)
CALCINATION
TEMP.
800°C 210 60 41 32 42 34 35 20
900°C 380 380 155 51 113 25 33 15
1000°C 383 170 85 35 310 182 26 11
The results of these tests are illustrated graphically in Figure 1 in which crushing strength in grams/3mm granule (pellet) is shown on the ordinate axis and percentage of additive A (Rice Hulls) or B (Wheatdust) on clay is shown on the coordinate axis at various calcination temperatures.
In order to test absorptivity the pellets were placed in Gooch crucibles with glass fibre pads. The crucibles were filled with distilled water and the water was allowed to percolate through the pellets. After draining this step was repeated.
Following the second draining the excess water was removed using a water tap venturi vacuum connection on a low pressure. The crucibles plus contents were then weighed with the result, as shown in Table 2.
Table 2 ABSORBTIVITY OF GRANULES
TYPE OF ADDITIVE RICE HULLS WHEAT DUST A B
ADDITIVE % 14 21 28 35 14 21 28 35
CLAY % 86 79 72 65 80 79 72 65
WATER ABSORPTION (grams/kg)
CALCINATION
TEMP.
800°c 404 541 671 873 582 700 845 1124
900°C 454 547 674 796 561 694 877 1126
1000°C 460 571 658 892 565 640 803 893
The results of Table 2 are illustrated graphically in Figure 2 which shows the water absorption in grams/100 grams of pellets on the ordinate axis and which shows the percentage by weight of rice hulls (A) or Wheat dust (B) added to the clay on the coordinate axis.
In other embodiments the ratio of clay to rice hulls or wheat dust has been varied from between 80%:20% by weight to 60%:40% by weight and particle sizes of clay and rice hulls have been varied between 75 and 600 microns. For finer particle size provides a more effective product but is more costly to obtain.
After drying of the pelletized mixture the hardened pellets have been exposed to kiln temperatures of from 550 to 850°C for from 3 to 1 hours, respectively. Temperatures of up to 1100 C may be employed.
It appears desirable that the firing temperatures must be high enough to combust all the carbon in the rice hulls or wheat dust.
Pellets manufactured in accordance with the invention compared according to the U.S. Interim Federal Specification for Sweeping Compounds, P.S.O. 008656(GSA-FSS) with commercially available pet litter pellets, showed the following results:
TABLE 3
Apparent Density Oil Absorption Water Absorption (lib/Cubic ft) (ml/g) (ml/g)
Pet Litter 51. .9 0.64 0.66
"Katlit" 33. .8 0.75 0.75
"Diatomite" 32. .8 0.86 0.97
"Pet Litter" 43, .8 0.60 0.60
Absorbant 41, .1 0.98 1.06
According to invention based on white clay
In further experiments the addition of wheat dust was found to give surprizingly better results than other cellulosic materials. The high absorbency of the pellets attributed to the fact that as the carbon is burned off in the kiln during the firing steps the organic silica skeleton of the rice hulls is left intact and an enhanced porosity is obtained. Grasses such as rice and wheat and other graminaceous plants absorb soluble silica from the soil which is deposited in insoluble form in the cell tissues. The amount of silica absorbed is a function of the transpiration.
Investigations into the preparation of a clay/rice husk product indicated that agglomeration was the preferable method of combining the two. Agglomeration produced a more consistent particle size range of the pellets with a rounded surface and therefore maximum surface area as compared with angular or crusted aggregates. Little or no dust was produced and no pressure was applied which would have increased the density.
As shown in Table 4 the addition of from 1 to 4% of a carbonate is beneficial. A number of samples were prepared, each consisting of clay (560 g), wheat dust (240g) and water 510g. Various quantities of sodium carbonate (from 0-32g) were dissolved in the water.
The products were pelletized, dried at 105°C and then calcined at 800, 900 and 1000°C respectively for 2 hrs.
Granule crushing strength tests were conducted as previously described with the result shown in Table 4.
TABLE 4 CRUSHING STRENGTH OF KITTY LITTER
GRANULE CRUSHING STRENGTH (grams) n = 20 Granules (-2.80 +2.00 mm)
CALCIUM TEMP. % Na2Cθ3 ADDED
0 1 2 4
800°C approx. 1 11.6 + 3 8.1 + 3 24.4 + 6
900°C 21.9 + 8 42 + 20 116.5 +40 131.7 + 28
1000°C 54.8 + 18 154 + 25 230.7 +54 481 +108
These results are illustrated graphically in Figure 3.
The results indicate that the addition of sodium carbonate was beneficial. Moisture absorptivity tests on products made with 4% sodium carbonate yielded an average moisture absorbtivity of in the range from 550 g/kg - 850 g/kg.
By way of example of a method for manufacture of pellets according to the invention a flow sheet is shown in Figure 4.
Clay is fed from storage hopper 1 to a gravimetric weight belt feeder 5. Wheat dust or rice hulls from a hopper 2 are optionally ground by hammer mill 3 and fed to gravimetric weightbelt feeder 4.
The weighed, and optionally ground, rice hulls or wheat and clay feedstocks are combined in nodulizer 6 together with water 14 metered via a flowmeter 11. The nodulizer properly incorporates the rice hulls or wheat dust into the clay and water and is preferably a twinshaft paddle mixer. The mixture is then treated in granulation drum 7 pellets or granules which are transferred to a drier 8, for example an "Adelaide Dryer".
The dried pellets proceed to calciner 9 which is fueled by a burner 12 boosted by fan 13 and supplied with fuel 15. Exit gas 16 from calciner 9 is used to heat dryer 8.
The calcined product passes to cooler 10 prior to packaging.
The cooling step is only needed if it is desired to package the product within 24 hrs.
To an extent which will be apparent to those skilled in the art from the teaching hereof other similar finely divided fibrous materials such as peanut hulls, corncobs, sawdust, grain dust or any combination thereof may be substituted for rice hulls.
Starch or polymer binders and other strengtheners may be added if desired without departing from the invention herein described.

Claims

1. A method of manufacture of an absorbent composition comprising the steps of mixing clay with cellulosic material, pelletizing the mixture, drying the resultant pellets, and heating the pellets to a temperature of from 550°C to 1100°C.
2. A method according to Claim 1 wherein the pellets are heated to a temperature above 550°C for three hours.
3. A method according to claim 1 or claim 2 wherein the pellets are heated to temperature of from 800 C to 850°C for at least one hour.
4. A method according to any one of the preceding claims wherein said cellulosic material is fibrous.
5. A method according to any one of the preceding claims wherein said cellulosic material comprises rice hulls, wheat dust, grain dust, peanut hulls, corncobs or sawdust or any combination thereof.
6. A method according to any one of the preceding claims wherein the ratio of clay to cellulosic material is in the range of 86:14 by weight to 60:40 by weight.
7. A method according to any one of the preceding claims wherein the particle sizes of clay and cellulosic material prior to pelletizing is between 75 and 600 microns.
8. A method according to any one of the preceding claims wherein the pellets have a diameter on their longest axis of less than 10 m.m.
9. A method according to any one of the preceding claims wherein the pellets are dried to a moisture content of less than 4% by weight.
10. A method according to any one of the preceding claims further including the step of combining a carbonate with the mixture prior to pelletizing.
11. A method according to any one of the preceding claims wherein the pellets are heated to a temperature of from 800°C to 1000°C for a time sufficient to complete combustion of the cellulose and then cooled.
12. A method according to any one of the preceding claims wherein the pellets are formed by agglomeration in a granuation drum.
13. An absorbent composition when manufactured by a method according to any one of the preceding claims.
14. A method according to claim 1 substantially as herein described with reference to any one of the examples.
15. An absorbent composition substantially as herein described with reference to any one of the examples.
EP19850903187 1984-07-17 1985-07-15 Absorbent clay. Withdrawn EP0188463A4 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPG604084 1984-07-17
AU6040/84 1984-07-17
AUPG822584 1984-11-21
AU8225/84 1984-11-21

Publications (2)

Publication Number Publication Date
EP0188463A1 true EP0188463A1 (en) 1986-07-30
EP0188463A4 EP0188463A4 (en) 1986-12-01

Family

ID=25642823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850903187 Withdrawn EP0188463A4 (en) 1984-07-17 1985-07-15 Absorbent clay.

Country Status (6)

Country Link
EP (1) EP0188463A4 (en)
DK (1) DK121286D0 (en)
ES (1) ES8606064A1 (en)
FI (1) FI861025A0 (en)
PT (1) PT80818B (en)
WO (1) WO1986000496A1 (en)

Families Citing this family (10)

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Publication number Priority date Publication date Assignee Title
FR2611432B1 (en) * 1985-03-21 1992-01-03 Lowe Henry NON-CLAY MATERIAL FOR TRIMMING CAT BOXES AND PROCESS FOR PREPARING THE SAME
GB8903004D0 (en) * 1989-02-10 1989-03-30 Mars G B Ltd Improvements in animal hygiene
DE3911678A1 (en) * 1989-04-10 1990-10-11 Organ Faser Technology Co ANIMAL TREATMENT AND METHOD FOR THE MANUFACTURE THEREOF
US5176107A (en) * 1989-07-24 1993-01-05 Buschur Jeffrey J Pet litter
US5207389A (en) * 1992-07-06 1993-05-04 The Andersons Cellulosic carrier
DE4338362A1 (en) * 1993-11-10 1995-05-11 Sued Chemie Ag Process for the production of smectite-based sorbents for the absorption of liquids
US5452684A (en) * 1994-05-24 1995-09-26 American Colloid Company Method of agglomerating a smectite clay litter
US6352210B1 (en) 2000-04-21 2002-03-05 S. C. Johnson & Son, Inc. Fragranced rice hull air fresheners
CA2349953A1 (en) * 2000-06-09 2001-12-09 Larry D. Bloomer Composite clumping cat litter
US6895896B1 (en) 2000-06-09 2005-05-24 Larry D. Bloomer Composite cat litter granule containing entrapped small size silica gel particles

Citations (3)

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Publication number Priority date Publication date Assignee Title
FR2063911A5 (en) * 1970-08-07 1971-07-09 Guery Francois Porous clay for use as adsorption agent,prodn
JPS548555A (en) * 1977-06-22 1979-01-22 Seiko Instr & Electronics Ltd External parts for eatches
SU1058600A1 (en) * 1981-07-23 1983-12-07 Институт коллоидной химии и химии воды им.А.В.Думанского Method of preparing adsorbent

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US2470346A (en) * 1946-04-30 1949-05-17 Great Lakes Carbon Corp Calcined diatomaceous earth product
DK127410B (en) * 1970-04-08 1973-11-05 Skarrehage Molervaerk As Process for the preparation of absorbent molar granules.
US3789797A (en) * 1971-11-12 1974-02-05 Star Kist Foods Cat litter
AU5370679A (en) * 1979-01-15 1980-08-07 Rocla Concrete Pipes Ltd. Clay based absorbent material
US4374044A (en) * 1981-01-19 1983-02-15 General Motors Corporation Cordierite bead catalyst support and method of preparation
DK105982A (en) * 1982-03-11 1983-11-21 Skamol Skarrehage Molerverk As PROCEDURE FOR THE PREPARATION OF LIQUID PREPARING GRANULATE AND A LIQUID PREPARING GRANULATE PREPARED IN ACCORDANCE WITH THE PROCEDURE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2063911A5 (en) * 1970-08-07 1971-07-09 Guery Francois Porous clay for use as adsorption agent,prodn
JPS548555A (en) * 1977-06-22 1979-01-22 Seiko Instr & Electronics Ltd External parts for eatches
SU1058600A1 (en) * 1981-07-23 1983-12-07 Институт коллоидной химии и химии воды им.А.В.Думанского Method of preparing adsorbent

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 100, no. 12, March 1984, page 128, abstract no. 87990c, Columbus, Ohio, US; & SU-A-1 058 600 (INSTITUTE OF COLLOIDAL AND WATER CHEMISTRY, ACADEMY OF SCIENCES UKRAINIAN S.S.R.) 07-12-1983 *
CHEMICAL ABSTRACTS, vol. 91, no. 8, August 1979, page 320, abstract no. 62236u, Columbus, Ohio, US; & JP-A-79 08 555 (AGENCY OF INDUSTRIAL SCIENCES AND TECHNOLOGY) 17-04-1979 *
See also references of WO8600496A1 *

Also Published As

Publication number Publication date
DK121286A (en) 1986-03-14
FI861025A (en) 1986-03-12
ES8606064A1 (en) 1986-04-01
DK121286D0 (en) 1986-03-14
PT80818B (en) 1987-03-23
FI861025A0 (en) 1986-03-12
EP0188463A4 (en) 1986-12-01
PT80818A (en) 1985-08-01
ES545307A0 (en) 1986-04-01
WO1986000496A1 (en) 1986-01-30

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