CN1092097A - In partial oxidation technology, adopt chemical recovery directly to dispose the method for Plastic wastes - Google Patents

In partial oxidation technology, adopt chemical recovery directly to dispose the method for Plastic wastes Download PDF

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Publication number
CN1092097A
CN1092097A CN93121334A CN93121334A CN1092097A CN 1092097 A CN1092097 A CN 1092097A CN 93121334 A CN93121334 A CN 93121334A CN 93121334 A CN93121334 A CN 93121334A CN 1092097 A CN1092097 A CN 1092097A
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China
Prior art keywords
plastic wastes
carbon
recovery
ash
coal ash
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Pending
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CN93121334A
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Chinese (zh)
Inventor
W·科瓦力克
H·J·马茨
W·索耶兹
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Norsk Hydro ASA
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Norsk Hydro ASA
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Publication of CN1092097A publication Critical patent/CN1092097A/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/82—Gas withdrawal means
    • C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
    • C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
    • C01B3/36—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using oxygen or mixtures containing oxygen as gasifying agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0959—Oxygen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0973—Water
    • C10J2300/0976—Water as steam
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/169—Integration of gasification processes with another plant or parts within the plant with water treatments
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
    • C10J2300/1846—Partial oxidation, i.e. injection of air or oxygen only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
    • C10J2300/1861—Heat exchange between at least two process streams
    • C10J2300/1884—Heat exchange between at least two process streams with one stream being synthesis gas
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock
    • Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Processing Of Solid Wastes (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The present invention relates to a kind of method by improved partial oxidation, gasification process chemical recovery Plastic wastes material, comprise vaporization, waste heat recovery and in scrubber unit, remove carbon, in this process, generated a kind of fly ash cement slurry that contains unburned carbon contained and coal ash, be delivered directly to Plastic wastes material and oily raw material in the reactor together, separate unburned carbon and coal ash, from gasification process, thoroughly remove then, set up partial oxidation technology of a successive thus, and the carbon that need not to reflux/coal ash residuum.Be at least 20% filter cake from the unitary cigarette ash of de-carbon/grout through having become a kind of dry matter content after filtering, above-mentioned filter cake is processed to callable ash content.

Description

In partial oxidation technology, adopt chemical recovery directly to dispose the method for Plastic wastes
The present invention relates to a kind ofly directly dispose the method for Plastic wastes by the chemical recovery plastic material, this plastic material is the raw material that is used for petrochemical process.The invention particularly relates to and reclaim the reactor unit of Plastic wastes as raw material entering part oxidizing process, this partial oxidation technology is under the condition that aerobic exists, with steam as conditioning agent, under high temperature and high pressure, carry out, this partial oxidation technology comprises gasification, waste heat recovery and in the process that the cigarette ash mud that contains unburned carbon contained and coal ash forms, removes carbon in scrubber unit.
So far, the research activities major part that reclaims Plastic wastes concentrates on the fusing again of plastics and utilizes, competing with former plastic material, yet, the processing of this purposes and reprocessing cost are very expensive, make these plastic materials not compete with former plastic material.Nearest research tendency is the upstream that is circulated back to chemical technique.Process this material at polymerization stage or before polymerization stage, make it be regenerated as hydrocarbon material.Yet, making to be difficult in this way realize economy, the necessity that makes this recovery method will overcome expensive carrier more and more increases.
Therefore once a kind of feed preparation unit is developed in suggestion, it can be added in the front of existing, industrial oil-processing units or petrochemical production device.Adopt chemistry or heat treating method that the plastic material that reclaims is reprocessed,, obtain the liquid feeding that is suitable in petrochemical unit, processing with the depolymerization long chain molecule.
In addition, according to european patent application 0474,626, the Plastic wastes of recovery are as the raw material of the hydrocarbon polymer gasifying process of making synthetic gas-hydrogen and carbon monoxide.Owing to contain many impurity in this Primordial Qi, this Primordial Qi will could be used for the production of basic chemical preparations such as ammonia and methyl alcohol as starting material and charging after purifying.
This Plastic wastes that under high pressure gasify and to make this process be the prerequisite of production successful operation continuously.According to above-mentioned patent application, the heavy oil residuum is heated to 150-250 ℃, be transported in the extrusion machine/mixing tank, here tentatively mix with plastic granule or particle, these plastic granules or particle are by oil treatment, and this makes the preparation of liquid form mixt to carry out under than the high pressure of existing pressure in subsequent reactor.Plastic grain/oil mixt is pressed in the reactor by a pipe, under the condition that has steam and oxygen to exist, is gasificated into synthesis gas.
When entering reactor, the temperature of fluid material is between 50-150 ℃, and viscosity is at least 300 ℃ of st, and 500 ℃ of st preferably, the pressure in the reactor are the 15-35 crust.
Yet this method can not be used for successive, the partial oxidation gasifying process.It does not provide the scheme of the problem of handling unburned carbon/coal ash residuum, and unburned carbon/coal ash accounts for very big ratio.According to present technological design, unburned carbon is recovered and is recycled to continuously charging, but along with the circulation of carbon/coal ash residuum, a large amount of Plastic wastes will be gasified, impurities in raw materials will be very high, make this process stop the most at last, unless emit in large quantities.
In addition, as above-mentioned european patent application is described, comprise an extra step, use extrusion machine/mixing tank, the partial oxidation device added do not wish the equipment that adds and make it complicated.
The viscosity of oil/plastic hybrid depends on the kind of plastics and the initial viscosity of quantity and base oil.Therefore, too high for fear of the viscosity that makes mixture, any increase of Plastic wastes concentration, all must by viscosity little, expensive more base oil comes balance, wishes that usually viscosity is at 250-300 ℃ below the st.
The someone proposes to reduce the idea of plastics to the influence of fuel viscosity by heat-treating methods, and according to previous experience, heat exchanger will be seriously blocked in this operation.
Free-revving engine of the present invention provides a kind of chemical recovery method that overcomes above-mentioned insufficient Plastic wastes, at first the purpose of this invention is to provide production technique of a kind of successive, reduce thus unburned carbon contained/coal ash residuum round-robin demand, this will have very big adaptability to the impurity that permission enters reactor.
In addition, an object of the present invention is to provide a kind of technology, wherein contain the direct input reactor of raw material energy of the Plastic wastes of recovery, and the uneconomic shortcoming that does not have viscosity problem and cause thus.
At last, a further object of the present invention provides a kind of Plastic wastes one-time continuous gasifying process of recovery, adopt more direct approach to reduce that plastics are disposed and pretreated cost and time of being consumed, make plastic material directly to use and need not any special pre-treatment.
Do in the process of simulation test at plastics (polyolefine) mixture that uses heavy oil and solution shape, adopt the condition of in the partial oxidation gasifying reactor, often using, found that viscosity with the concentration of plastic material from about 10% and Geng Gao increase astoundingly.When concentration is increased to 15-22%(by weight), viscosity has increased by 40 times.
Therefore, even be no more than the peak viscosity in normal when operation, also be not all right to the Polymer wastes of gasifying reactor input high density.
The partial oxidation technology of hydrocarbon material as far back as this century the fifties just grown up, and commercialization, well-known technology such as Shell gasifying process and Texaco gasifying process have used on some industrialized units.
Usually, this gasifying process that is raw material with plastics and other hydrocarbon polymers of recovery comprises three important steps:
-gasification, under the situation that has oxygen and conditioning agent to exist, raw material is converted to former synthesis gas.
-reclaim used heat, from the hot gas that leaves reactor, obtain high pressure steam, and
-remove carbon, adopt multistage washing to go out to remove remaining carbon the gas body from reactor.
Thus, unburned carbon will form a kind of mud of carbon in the gasifier, a kind of aqueous suspension that contains cigarette ash and a large amount of coal ash, and this depends on used raw material, the mud of this carbon need be through further processing and reclaiming.
The raw material that it is exactly certain percentage quantity that there is a serious defective in this technology is not vaporized, and they exist with the form of cigarette ash, mixes with the coal ash of the hydrocarbon material of conducting oneself with dignity of a great deal of.
The soot/ash mud that obtains from the carbon separating step contains the coal ash of the unburned carbon contained and 0.1-2% of 0.5-3% usually, contains a large amount of Ni, Fe and V and cl and pigment in the coal ash, also has other inorganic substance that use in plastic material is produced.
If do not reflux unburned carbon and coal ash, the total efficiency of gasifying process will be improved, and the amount of impurity will increase significantly in the raw material, because because the backflow of this material, impurity is accumulation gradually not.
Adopt a kind of improved filtration step can avoid this backflow: at first after in solution, adding flocculation agent, to carry out a precipitation process from the carbon/cigarette ash/grout of coal ash removal step.Filter being lower than under 80-75 ℃ the low temperature, preferably in 20-60 ℃ temperature range, this cigarette ash slime water that contains from the impurity in the plastic material combustion processes is fed movably between the strainer, apply a constant line pressure, up to the water content of filter cake less than 80%, no longer be as saponiform or pasty state but obtain a kind of separate easily and be suitable for subsequently transportation and the filter cake or the particulate mass of processing.
According to the present invention, provide a kind of method that adopts above-mentioned one-time process chemical recovery Plastic wastes now, oil and plastic material directly are admitted to gasifying reactor, and need not pre-treatment any chemistry or the hot molecular chain that ruptures.
The oil raw material can comprise various useless residuums and oil, as high perfume oil, and PCB and other waste prods from petrochemical complex industry, they are disposed by the method for high temperature incineration at present.
When oily and plastic material mix, with oil and the direct input reactor burner of plastic material, can avoid the above-mentioned problem of mentioning respectively.
Essential characteristic of the present invention is as defined in the following claim 1-6, and by following detailed description of the present invention, other important aspect will be clear.
Fig. 1 is to use the old process figure of the gasifying process of oil/plastic raw materials.
Plastic wastes material 15 and oil 12 directly are transported in the reactor 13 of gasification unit, under the situation that has oxygen 16 to exist, use steam 17 to be conditioning agent, gasify and partial oxidation under the temperature of pressure that 40-60 clings to and 1300-1500 ℃.Through behind the waste heat recovery unit 14, gas, washes with water and removes unburned carbon and coal ash in this device by a carbon removing device 1.Formed soot/ash slime water from carbon/coal ash tripping device 1 passes a water cooler 2 at first, so that its temperature is reduced to 20-60 ℃ from about 95 ℃.Mud is sent in the cigarette ash mud tank 3 then, passed a mixing pit 4 afterwards, so that from source 5, add flocculation.Use two kinds of flocculation agents, a kind of trade mark is that Praestol 611BC(is cationic) positively charged polyelectrolyte and a kind of trade mark be Praestol 2440(anionic) electronegative polyelectrolyte, the both be white the polyacrylamide particle.The ratio of two kinds of flocculation agents can change in very wide scope, but the ratio of preferably cationic and anionic flocculant is in the 1-5:0.5-2 scope.
The adding total amount of flocculation agent is adjusted in the scope of 60-100ppm, and positively charged ion is 1.5:1 with the ratio of anionic flocculant, and flocculation agent joins in the mud with the form of the aqueous solution of 0.1-0.3%.
When passing settling tank 6, mud dewatered for the first time, pass filtering unit 7 then, in this device, between the strainer of two vertical shifting, be squeezed, at last push strainer together and apply a constant compression force by means of the extruding of reel, water content up to filter cake is reduced to＜and 80%, be back in the cigarette ash separating unit 1 by means of pump and pipeline 10 from the filtrate of filtration unit 7.
Afterwards filter cake is placed on one movably on the travelling belt, the dried cake or the sheet that are approximately 2mm with mean thickness are sent in the fuel element 8, and its product 9 can be handled and further processing without a doubt.The ratio of the plastics of oil and recovery can change in a very wide scope, and the upper limit of plastics can reach 40-50%(by weight) or higher, and the danger of foreign matter content is less than the danger of known recovery technology in Plastic wastes.Even the plastic material (PVC) that contains chlorine also can allow certain content, because high temperature, any organochlorine compound all will be decomposed, and the hydrochloric acid of generation can fall in the technology inter-process with the neutral method according to the present invention.

Claims (6)

1, by means of the method for improved partial oxidation, gasifying process chemical recovery Plastic wastes material, comprise gasification, waste heat recovery and in the washing unit, remove carbon, in this process, generated a kind of unburned carbon contained and cigarette ash slime water coal ash of containing, it is characterized in that in plastic wastes material and the direct input reactor of oily raw material, from the gas that generates, separate unburned carbon and coal ash, and from gasification, remove, set up partial oxidation technology of a successive thus, and the carbon that need not to reflux/coal ash residuum.
2, the method for recovery Plastic wastes as claimed in claim 1 is characterized in that the Plastic wastes material of liquid form and oily raw material are transported in the reactor burner as two kinds of independent fluid.
3, the method for recovery Plastic wastes as claimed in claim 1 is characterized in that filtering from the unitary cigarette ash/grout of de-carbon, forms to contain dry-matter and be at least 20% filter cake, and above-mentioned filter cake is formed to the coal ash of recovery, contains a spot of carbon.
4, the method for recovery Plastic wastes as claimed in claim 1 before it is characterized in that filtering, adds two kinds of polyelectrolyte flocculant in cigarette ash mud, a kind of is cationic polyelectrolyte, and another is the polyelectrolyte of anionic.
5, the method for recovery Plastic wastes as claimed in claim 1 is characterized in that mud cools filtering then to the temperature that is lower than 80 ℃, is reduced to up to water content to be lower than 80% by weight.
6, the method for recovery Plastic wastes as claimed in claim 1, the adding total amount that it is characterized in that flocculation agent is 60-100ppm, cationic polyelectrolyte remains on 1-5:0.5-2 with the ratio of anionic polyelectrolyte.
CN93121334A 1992-11-11 1993-11-11 In partial oxidation technology, adopt chemical recovery directly to dispose the method for Plastic wastes Pending CN1092097A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO924337 1992-11-11
NO924337A NO176669C (en) 1992-11-11 1992-11-11 Process for the direct disposal of plastic waste by chemical recycling in a process for partial oxidation of hydrocarbons

Publications (1)

Publication Number Publication Date
CN1092097A true CN1092097A (en) 1994-09-14

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CN93121334A Pending CN1092097A (en) 1992-11-11 1993-11-11 In partial oxidation technology, adopt chemical recovery directly to dispose the method for Plastic wastes

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CN (1) CN1092097A (en)
CA (1) CA2149145C (en)
NO (1) NO176669C (en)
WO (1) WO1994011465A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102256761A (en) * 2008-11-07 2011-11-23 Apk铝和塑料股份公司 Method for separating individual valuable materials from mixed, in particular milled, plastic waste
CN113185257A (en) * 2021-03-31 2021-07-30 太原理工大学 Solid waste regeneration foamed ceramic material for heat insulation wall and preparation method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396367B (en) * 1990-09-05 1993-08-25 Oemv Ag METHOD FOR CONTINUOUSLY introducing a MIXTURE WITH PLASTICS TO BE GASIFIED AND LIQUID TO GASIFY
AT397808B (en) * 1992-04-22 1994-07-25 Oemv Ag METHOD FOR PRESSURE GASIFICATION OF ORGANIC SUBSTANCES, e.g. PLASTIC MIXTURES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102256761A (en) * 2008-11-07 2011-11-23 Apk铝和塑料股份公司 Method for separating individual valuable materials from mixed, in particular milled, plastic waste
CN102256761B (en) * 2008-11-07 2015-09-30 Apk铝和塑料股份公司 The method respectively having valency material is separated by the plastic wastes particularly pulverized mixed
CN113185257A (en) * 2021-03-31 2021-07-30 太原理工大学 Solid waste regeneration foamed ceramic material for heat insulation wall and preparation method thereof

Also Published As

Publication number Publication date
NO924337D0 (en) 1992-11-11
NO924337L (en) 1994-05-13
WO1994011465A1 (en) 1994-05-26
NO176669C (en) 1995-05-10
NO176669B (en) 1995-01-30
CA2149145C (en) 2004-04-13
CA2149145A1 (en) 1994-05-26

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C01 Deemed withdrawal of patent application (patent law 1993)
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