CA2003317A1 - Method of disposal of hazardous particulate solid waste by asphalt emulsion encapsulation - Google Patents
Method of disposal of hazardous particulate solid waste by asphalt emulsion encapsulationInfo
- Publication number
- CA2003317A1 CA2003317A1 CA 2003317 CA2003317A CA2003317A1 CA 2003317 A1 CA2003317 A1 CA 2003317A1 CA 2003317 CA2003317 CA 2003317 CA 2003317 A CA2003317 A CA 2003317A CA 2003317 A1 CA2003317 A1 CA 2003317A1
- Authority
- CA
- Canada
- Prior art keywords
- asphalt
- waste
- emulsion
- slurry
- particulate waste
- 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.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
- E01C7/353—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/21—Agglomeration, binding or encapsulation of solid waste using organic binders or matrix
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K11/00—Use of ingredients of unknown constitution, e.g. undefined reaction products
- C08K11/005—Waste materials, e.g. treated or untreated sewage sludge
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
METHOD OF DISPOSAL OF HAZARDOUS PARTICULATE SOLID WASTE
BY ASPHALT EMULSION ENCAPSULATION
ABSTRACT OF THE DISCLOSURE
The present invention provides a method of disposing of hazardous particulate waste containing hazardous waste by forming an asphalt emulsion slurry and using the slurry as a commercial asphalt emulsion slurry seal. The method comprises;
the steps of:
a) selecting an emulsifying agent suitable to form a stable emulsion of asphalt, water and said particulate waste;
b) mixing the particulate waste and asphaltic emulsion in proportions to form an asphaltic emulsion slurry having safe leaching properties;
c) utilizing said asphaltic emulsion slurry in existing commercial uses.
BY ASPHALT EMULSION ENCAPSULATION
ABSTRACT OF THE DISCLOSURE
The present invention provides a method of disposing of hazardous particulate waste containing hazardous waste by forming an asphalt emulsion slurry and using the slurry as a commercial asphalt emulsion slurry seal. The method comprises;
the steps of:
a) selecting an emulsifying agent suitable to form a stable emulsion of asphalt, water and said particulate waste;
b) mixing the particulate waste and asphaltic emulsion in proportions to form an asphaltic emulsion slurry having safe leaching properties;
c) utilizing said asphaltic emulsion slurry in existing commercial uses.
Description
2~1~3~7 METHOD OF DISPOSAL OF HAZARDOUS PARTICULATE SOLID WAS~E
BY ASPHALT EMULSION ENCAPSULATION
BACXGROUND OF THE INVENTION
This invention pertains to the field of solid waste materials and more particularly to a method of disposal of koxic particulate material by encapsulation in an asphalt emulsion.
Certain industrial processes, such as the combustion of waste solids, produce a fly ash which is environmentally hazardous due to the presence of toxic elements such as lead.
Such fly ash cannot be disposed of in a standard landfill due to the leaching of the toxic material into the water table. Even where there is a mate.rial which renders the waste resistant to leaching, landfill sites are becoming scarce and expensive.
One method of disposing of waste fly ash which has been used in the past where the level of toxic elements in the fly ash has been sufficiently low has been the addition of the fly ash as a filler in asphalt concrete pavement or blacktop.
This method of disposal i5 unsuitable for fly ash having high levels of toxic elements since some leaching of the toxic elements still occurs.
United States patent no. 4,623,469 issue November 18, 1986 to Chem-Technics, Inc. discloses a method of disposing of hydrophillic liquid and semi-liquid waste by mixing the waste liquid and asphalt to generate a solid hydrophobic mass which can be disposed of in a landfill. According to this method, the ionic charge of the waste counter ions is determined and an emulsified asphaltic suspension having a particle charge opposite to the 33;~7 ionic charge of the waste counter ions is selected. Enough of the selected asphaltic emulsion is added to the waste liquid to coalesce into a solid hydrophobic mass. The mixture is allowed to set and cure to a solid state. This method, however, uses valuable landfill space, and the end product is not commercially useful.
An asphalt emulsion, or emulsified asphalt, is an emulsion of fine droplets of asphalt cement or bitumen in water.
The emulsion is stabilized by the presence of an emulsifying agent, such as a detergentO Depending on the emulsifying agent used, such emulsions are either anionic, having negatively charged asphalt globules, or cationic, having positively charged asphalt globules. Such emulsions are commercially available for a number of uses. One such use is to form an asphalt emulsion slurry seal which is a mixture o~ emulsified asphalt, fine aggregate and mineral filler with water to produce a slurry. When dried by water evaporation, the slurry becomes a thick, jelly-like coating material which is applied wet much like a paint to coat pavement, driveways and the like.
There is therefore a need for a method of safely disposing of toxic particulate waste in a manner which is resistant to leaching yet does not require valuable landfill space and can be used commercially.
SUMMARY OF THE INVENTION
The present invention provides a method of disposing of hazardous particulate waste containing hazardous waste by 33~L~
forming an asphalt emulsion slurry and using the slurry as a commercial asphalt emulsion slurry seal. The method comprises the steps of:
a) selecting an emulsifying agent suitable to form a stable emulsion of asphalt, water and said particulate waste;
b) mixing the particulate waste and asphaltic emuIsion in proportions to form an asphaltic emulsion slurry having safe leaching properties;
c) utilizing said asphaltic emulsion slurry in existing commercial uses.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
In the present invention, a suitable asphalt emulsion slurry is prepared using the fly ash as a constituent. In order to obtain a suitable slurry, the appropriate emulsifying agent must first be chosen so that the asphalt globules in the emulsion will encapsulate the *ly ash particles. This can be done by making sample mixtures of the fly ash, asphalt and water and various of the commercially available emulsifying agents and visually determining which combination mixes properly. If the iOlliC charge of the waste fly ash material when added to the emulsion can be determined, then a suitable emulsifying agent with charge opposite to tha waste ions is selected. Either anionic or cationic asphalt emulsions will be required depending on the nature of the particulate waste.
Having determined the appropriate emulsifying agent, sample mixtures of fly ash and asphalt emulsion are prepared '': ' -' )333l7 covering a range of percenta~es of fly ash in the mixture for purposes of testing the degree of leachin~, and in order to select those percentages which keep the leaching within an environmentally acceptable range. The desired result is achieved most effectively where there is complete encapsulation o~ the fly ash particles by the asphalt globules. Further, the relative proportions of asphalt emulsion and fly ash are chosen so that the mixture produces an asphalt emulsion slurry, rather than a solid mass.
The final asphalt emulsion slurry which is produced can be used commercially in the usual manner, as a slurry coat pavement or sealer, for example as a slurry coat pavement for roadways or commercial/industrial sites, or as a ground cover sealer. The weight:area ratio of these applications will typically be low to minimize the concentration of the hazardous waste, but will depend on the type and concentration of the toxic waste. In this way the hazardous fly ash is disposed of in a safe yet commercially useful way, and the need for landfill sites to store the waste is minimized.
EXAMPLE
A hazardous fly ash containiny unsafe levels of lead was utilized. In particular, the fly ash was obtained from a bag house filtration air emission system and collection assembly for incinerated municipal waste. The fly ash contained lead in excess of the allowable leachate test limits as contained in the British Columbia Waste Management Act, "Leachate Extraction Procedures -q~
special Waste, Schedule 4i', that is, the leachate producedcontained greater than 5 parts per million of lead. Various emulsifying agents were tested with fly ash, asphal~ and water mixture to produce a suitabl~ emulsion. ~n the case of this particular fly ash, REDI-KOTE E-5762 ~trade-mark) manufactured by Armak Chemical Co. was found to produce a suitably stable emulsion. Various sample mixtures of asphalt emulsion and fly ash in proportions of 5%, 10%,15~, 20% and 25% by weight were produced. A water leaching test as prescribed by the British Columbia Waste Management Act (February 29, 1988) as prescribed in "Special Waste - Schedule 4" was carried out on the samples.
The leachate from each sample was prepared a~d analyzed. The lead levels found in the leachate were found to be acceptable, for example 4.02 parts per million in the 15~ sample and 3.39 parts per million in the 25% sample.
The various samples, with the exception of the 25%
sample, were found to be of suitable composition for use as asphalt emulsion slurries. The 25% sample would not normally have been acceptable as a workable slurry for pavement coatin~ or similar uses.
As will be apparent to those skilled in the art, various modifications and adaptations of the structure above described may be made without departing from the spirit of the invention, the scope of which is to be construed in accordance with the accompanying claims.
BY ASPHALT EMULSION ENCAPSULATION
BACXGROUND OF THE INVENTION
This invention pertains to the field of solid waste materials and more particularly to a method of disposal of koxic particulate material by encapsulation in an asphalt emulsion.
Certain industrial processes, such as the combustion of waste solids, produce a fly ash which is environmentally hazardous due to the presence of toxic elements such as lead.
Such fly ash cannot be disposed of in a standard landfill due to the leaching of the toxic material into the water table. Even where there is a mate.rial which renders the waste resistant to leaching, landfill sites are becoming scarce and expensive.
One method of disposing of waste fly ash which has been used in the past where the level of toxic elements in the fly ash has been sufficiently low has been the addition of the fly ash as a filler in asphalt concrete pavement or blacktop.
This method of disposal i5 unsuitable for fly ash having high levels of toxic elements since some leaching of the toxic elements still occurs.
United States patent no. 4,623,469 issue November 18, 1986 to Chem-Technics, Inc. discloses a method of disposing of hydrophillic liquid and semi-liquid waste by mixing the waste liquid and asphalt to generate a solid hydrophobic mass which can be disposed of in a landfill. According to this method, the ionic charge of the waste counter ions is determined and an emulsified asphaltic suspension having a particle charge opposite to the 33;~7 ionic charge of the waste counter ions is selected. Enough of the selected asphaltic emulsion is added to the waste liquid to coalesce into a solid hydrophobic mass. The mixture is allowed to set and cure to a solid state. This method, however, uses valuable landfill space, and the end product is not commercially useful.
An asphalt emulsion, or emulsified asphalt, is an emulsion of fine droplets of asphalt cement or bitumen in water.
The emulsion is stabilized by the presence of an emulsifying agent, such as a detergentO Depending on the emulsifying agent used, such emulsions are either anionic, having negatively charged asphalt globules, or cationic, having positively charged asphalt globules. Such emulsions are commercially available for a number of uses. One such use is to form an asphalt emulsion slurry seal which is a mixture o~ emulsified asphalt, fine aggregate and mineral filler with water to produce a slurry. When dried by water evaporation, the slurry becomes a thick, jelly-like coating material which is applied wet much like a paint to coat pavement, driveways and the like.
There is therefore a need for a method of safely disposing of toxic particulate waste in a manner which is resistant to leaching yet does not require valuable landfill space and can be used commercially.
SUMMARY OF THE INVENTION
The present invention provides a method of disposing of hazardous particulate waste containing hazardous waste by 33~L~
forming an asphalt emulsion slurry and using the slurry as a commercial asphalt emulsion slurry seal. The method comprises the steps of:
a) selecting an emulsifying agent suitable to form a stable emulsion of asphalt, water and said particulate waste;
b) mixing the particulate waste and asphaltic emuIsion in proportions to form an asphaltic emulsion slurry having safe leaching properties;
c) utilizing said asphaltic emulsion slurry in existing commercial uses.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
In the present invention, a suitable asphalt emulsion slurry is prepared using the fly ash as a constituent. In order to obtain a suitable slurry, the appropriate emulsifying agent must first be chosen so that the asphalt globules in the emulsion will encapsulate the *ly ash particles. This can be done by making sample mixtures of the fly ash, asphalt and water and various of the commercially available emulsifying agents and visually determining which combination mixes properly. If the iOlliC charge of the waste fly ash material when added to the emulsion can be determined, then a suitable emulsifying agent with charge opposite to tha waste ions is selected. Either anionic or cationic asphalt emulsions will be required depending on the nature of the particulate waste.
Having determined the appropriate emulsifying agent, sample mixtures of fly ash and asphalt emulsion are prepared '': ' -' )333l7 covering a range of percenta~es of fly ash in the mixture for purposes of testing the degree of leachin~, and in order to select those percentages which keep the leaching within an environmentally acceptable range. The desired result is achieved most effectively where there is complete encapsulation o~ the fly ash particles by the asphalt globules. Further, the relative proportions of asphalt emulsion and fly ash are chosen so that the mixture produces an asphalt emulsion slurry, rather than a solid mass.
The final asphalt emulsion slurry which is produced can be used commercially in the usual manner, as a slurry coat pavement or sealer, for example as a slurry coat pavement for roadways or commercial/industrial sites, or as a ground cover sealer. The weight:area ratio of these applications will typically be low to minimize the concentration of the hazardous waste, but will depend on the type and concentration of the toxic waste. In this way the hazardous fly ash is disposed of in a safe yet commercially useful way, and the need for landfill sites to store the waste is minimized.
EXAMPLE
A hazardous fly ash containiny unsafe levels of lead was utilized. In particular, the fly ash was obtained from a bag house filtration air emission system and collection assembly for incinerated municipal waste. The fly ash contained lead in excess of the allowable leachate test limits as contained in the British Columbia Waste Management Act, "Leachate Extraction Procedures -q~
special Waste, Schedule 4i', that is, the leachate producedcontained greater than 5 parts per million of lead. Various emulsifying agents were tested with fly ash, asphal~ and water mixture to produce a suitabl~ emulsion. ~n the case of this particular fly ash, REDI-KOTE E-5762 ~trade-mark) manufactured by Armak Chemical Co. was found to produce a suitably stable emulsion. Various sample mixtures of asphalt emulsion and fly ash in proportions of 5%, 10%,15~, 20% and 25% by weight were produced. A water leaching test as prescribed by the British Columbia Waste Management Act (February 29, 1988) as prescribed in "Special Waste - Schedule 4" was carried out on the samples.
The leachate from each sample was prepared a~d analyzed. The lead levels found in the leachate were found to be acceptable, for example 4.02 parts per million in the 15~ sample and 3.39 parts per million in the 25% sample.
The various samples, with the exception of the 25%
sample, were found to be of suitable composition for use as asphalt emulsion slurries. The 25% sample would not normally have been acceptable as a workable slurry for pavement coatin~ or similar uses.
As will be apparent to those skilled in the art, various modifications and adaptations of the structure above described may be made without departing from the spirit of the invention, the scope of which is to be construed in accordance with the accompanying claims.
Claims (15)
1. A method of disposing of hazardous particulate waste compris-ing:
a) selecting an emulsifying agent suitable to form a stable emulsion of asphalt, water and said particulate waste;
b) mixing the particulate waste and asphaltic emulsion in proportions to form an asphaltic emulsion slurry having safe leaching properties;
c) utilizing said asphaltic emulsion slurry in existing commercial uses.
a) selecting an emulsifying agent suitable to form a stable emulsion of asphalt, water and said particulate waste;
b) mixing the particulate waste and asphaltic emulsion in proportions to form an asphaltic emulsion slurry having safe leaching properties;
c) utilizing said asphaltic emulsion slurry in existing commercial uses.
2. The method of claim 1 in which said particulate waste is fly ash.
3. The method of claim 1 in which said existing commercial use is the coating of pavement.
4. The method of claim 1 in which said fly ash comprises less than 30% by weight of said asphalt emulsion slurry.
5. A method of disposing of hazardous particulate waste contain-ing hazardous waste ions comprising:
a) determining the ionic charge of the waste ions;
b) selecting an asphaltic emulsion suitable to form a stable mixture with said particulate waste;
c) mixing the particulate waste and asphaltic emulsion in proportions to form an asphaltic emulsion slurry;
d) utilizing said asphaltic emulsion slurry in existing commercial uses.
a) determining the ionic charge of the waste ions;
b) selecting an asphaltic emulsion suitable to form a stable mixture with said particulate waste;
c) mixing the particulate waste and asphaltic emulsion in proportions to form an asphaltic emulsion slurry;
d) utilizing said asphaltic emulsion slurry in existing commercial uses.
6. The method of claim 1 in which said particulate waste is fly ash.
7. The method of claim 1 in which said existing commercial use is the coating of pavement.
8. The method of claim 1 in which said fly ash comprises less than 30% by weight of said asphalt emulsion slurry.
9. A method of disposing of hazardous particulate waste compris-ing:
a) selecting an emulsifying agent suitable to form a stable emulsion of asphalt, water and said particulate waste in which said particulate waste is completely encapsulated in said asphalt;
b) mixing the particulate waste and asphaltic emulsion in proportions to form an asphaltic emulsion slurry having safe leaching properties;
c) utilizing said asphaltic emulsion slurry in existing commercial uses.
a) selecting an emulsifying agent suitable to form a stable emulsion of asphalt, water and said particulate waste in which said particulate waste is completely encapsulated in said asphalt;
b) mixing the particulate waste and asphaltic emulsion in proportions to form an asphaltic emulsion slurry having safe leaching properties;
c) utilizing said asphaltic emulsion slurry in existing commercial uses.
10. The method of claim 1 in which said particulate waste is fly ash.
11. The method of claim 1 in which said existing commercial use is the coating of pavement.
12. The method of claim 1 in which said fly ash comprises less than 30% by weight of said asphalt emulsion slurry.
13. An asphalt emulsion slurry containing hazardous particulate waste.
14. The asphalt emulsion slurry of claim 13 wherein said hazardous particulate waste is fly ash.
15. The asphalt emulsion slurry of claim 14 wherein said slurry comprises less than 30% by weight fly ash.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2003317 CA2003317A1 (en) | 1989-11-17 | 1989-11-17 | Method of disposal of hazardous particulate solid waste by asphalt emulsion encapsulation |
| GB9021675A GB2238258B (en) | 1989-11-17 | 1990-10-05 | Method of disposal of hazardous particulate solid waste by asphalt emulsion encapsulation |
| DE4034931A DE4034931C2 (en) | 1989-11-17 | 1990-11-02 | Process for the disposal of dangerous particulate, solid waste materials by asphalt emulsion encapsulation |
| IT4844590A IT1242162B (en) | 1989-11-17 | 1990-11-06 | PROCESS FOR THE ELIMINATION OF HARMFUL SOLID WASTE IN THE FORM OF PARTICLES BY ENCAPSULATION IN BITUMINOUS EMULSION |
| JP2310099A JPH03178387A (en) | 1989-11-17 | 1990-11-14 | Method for disposal of harmful granular solid waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2003317 CA2003317A1 (en) | 1989-11-17 | 1989-11-17 | Method of disposal of hazardous particulate solid waste by asphalt emulsion encapsulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2003317A1 true CA2003317A1 (en) | 1991-05-17 |
Family
ID=4143587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2003317 Abandoned CA2003317A1 (en) | 1989-11-17 | 1989-11-17 | Method of disposal of hazardous particulate solid waste by asphalt emulsion encapsulation |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH03178387A (en) |
| CA (1) | CA2003317A1 (en) |
| DE (1) | DE4034931C2 (en) |
| GB (1) | GB2238258B (en) |
| IT (1) | IT1242162B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4109126A1 (en) * | 1991-03-20 | 1992-09-24 | Aquamot Ag | METHOD FOR TREATING COMBUSTION AND / OR SMOKE GAS CLEANING RESIDUES |
| DE4238307A1 (en) * | 1992-11-13 | 1994-05-19 | Deutag Ag | Utilising mineral oil-contaminated soil - by mixing with hot mineral and bitumen binder, or treating with aq. binder emulsion to give asphalt |
| DE4439173A1 (en) * | 1994-11-07 | 1996-05-09 | C & E Consulting Und Engineeri | Immobilisation of harmful materials in dust or particle form |
| FR2752387B1 (en) * | 1996-08-14 | 2001-10-26 | Cylergie Gie | STABILIZATION-SOLIDIFICATION PROCESS OF INCINERATION RESIDUES OF URBAN OR INDUSTRIAL WASTE AND INSTALLATION FOR ITS IMPLEMENTATION |
| US7452163B2 (en) | 2005-03-31 | 2008-11-18 | The Trustees Of Stevens Institute Of Technology | Method of treatment, stabilization and heave control for chromite ore processing residues (COPR) and chromium contaminated soils |
| CN111167329B (en) * | 2020-01-06 | 2022-03-11 | 杰瑞邦达环保科技有限公司 | Pulping method for solid-liquid mixed organic hazardous waste |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU573527A1 (en) * | 1975-02-17 | 1977-09-25 | Среднеазиатский Филиал Всесоюзного Государственного Дорожного Научно-Исследовательского Института "Союздорнии" | Asphalt-concrete mortar for road paving |
| JPS5785853A (en) * | 1980-11-14 | 1982-05-28 | Nichireki Chem Ind Co Ltd | Mixture for pavement |
| US4623469A (en) * | 1983-09-15 | 1986-11-18 | Chem-Technics, Inc. | Method for rendering hazardous wastes less permeable and more resistant to leaching |
| JPS60180949A (en) * | 1984-02-29 | 1985-09-14 | 日瀝化学工業株式会社 | Cement bitumen formed matter for pavement |
| JPH01170653A (en) * | 1987-12-26 | 1989-07-05 | Showa Shell Sekiyu Kk | Paving material composition of asphalt emulsion base |
| HUT50853A (en) * | 1988-07-26 | 1990-03-28 | Energiagazdalkodasi Intezet | Process for building in depth controlled flexible road structures, pave plates, or subordinated or approach roads |
-
1989
- 1989-11-17 CA CA 2003317 patent/CA2003317A1/en not_active Abandoned
-
1990
- 1990-10-05 GB GB9021675A patent/GB2238258B/en not_active Expired - Fee Related
- 1990-11-02 DE DE4034931A patent/DE4034931C2/en not_active Expired - Fee Related
- 1990-11-06 IT IT4844590A patent/IT1242162B/en active IP Right Grant
- 1990-11-14 JP JP2310099A patent/JPH03178387A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03178387A (en) | 1991-08-02 |
| IT9048445A0 (en) | 1990-11-06 |
| IT1242162B (en) | 1994-02-16 |
| DE4034931A1 (en) | 1991-05-23 |
| GB2238258A (en) | 1991-05-29 |
| GB9021675D0 (en) | 1990-11-21 |
| DE4034931C2 (en) | 1995-04-20 |
| GB2238258B (en) | 1993-11-24 |
| IT9048445A1 (en) | 1992-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |