GB1451571A - Method for separating polyvinyl chloride from a mixture of plastics by flotation - Google Patents
Method for separating polyvinyl chloride from a mixture of plastics by flotationInfo
- Publication number
- GB1451571A GB1451571A GB2062174A GB2062174A GB1451571A GB 1451571 A GB1451571 A GB 1451571A GB 2062174 A GB2062174 A GB 2062174A GB 2062174 A GB2062174 A GB 2062174A GB 1451571 A GB1451571 A GB 1451571A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flotation
- acid
- polyvinyl chloride
- plastics
- acid salt
- 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.)
- Expired
Links
- 238000005188 flotation Methods 0.000 title abstract 3
- 239000004033 plastic Substances 0.000 title abstract 3
- 229920003023 plastic Polymers 0.000 title abstract 3
- 239000004800 polyvinyl chloride Substances 0.000 title abstract 3
- 229920000915 polyvinyl chloride Polymers 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 239000000203 mixture Substances 0.000 title abstract 2
- 239000007789 gas Substances 0.000 abstract 5
- 150000003839 salts Chemical class 0.000 abstract 4
- 239000002253 acid Substances 0.000 abstract 3
- 239000002609 medium Substances 0.000 abstract 3
- -1 polypropylene Polymers 0.000 abstract 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 abstract 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 abstract 2
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 abstract 1
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 abstract 1
- 108010010803 Gelatin Proteins 0.000 abstract 1
- 229920000877 Melamine resin Polymers 0.000 abstract 1
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 abstract 1
- 239000004952 Polyamide Substances 0.000 abstract 1
- 239000004698 Polyethylene Substances 0.000 abstract 1
- 239000004743 Polypropylene Substances 0.000 abstract 1
- 239000004793 Polystyrene Substances 0.000 abstract 1
- 235000017343 Quebracho blanco Nutrition 0.000 abstract 1
- 241000065615 Schinopsis balansae Species 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 abstract 1
- 239000012736 aqueous medium Substances 0.000 abstract 1
- 229910052786 argon Inorganic materials 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 230000005587 bubbling Effects 0.000 abstract 1
- 229960000411 camphor oil Drugs 0.000 abstract 1
- 239000010624 camphor oil Substances 0.000 abstract 1
- 235000013877 carbamide Nutrition 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000010642 eucalyptus oil Substances 0.000 abstract 1
- 229940044949 eucalyptus oil Drugs 0.000 abstract 1
- 239000000284 extract Substances 0.000 abstract 1
- 238000009291 froth flotation Methods 0.000 abstract 1
- 229920000159 gelatin Polymers 0.000 abstract 1
- 239000008273 gelatin Substances 0.000 abstract 1
- 235000019322 gelatine Nutrition 0.000 abstract 1
- 235000011852 gelatine desserts Nutrition 0.000 abstract 1
- 239000003292 glue Substances 0.000 abstract 1
- 229920005610 lignin Polymers 0.000 abstract 1
- 238000010907 mechanical stirring Methods 0.000 abstract 1
- 150000007974 melamines Chemical class 0.000 abstract 1
- 238000005065 mining Methods 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- RNVCVTLRINQCPJ-UHFFFAOYSA-N o-toluidine Chemical compound CC1=CC=CC=C1N RNVCVTLRINQCPJ-UHFFFAOYSA-N 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000010665 pine oil Substances 0.000 abstract 1
- 229920000058 polyacrylate Polymers 0.000 abstract 1
- 229920002647 polyamide Polymers 0.000 abstract 1
- 229920000728 polyester Polymers 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 235000013824 polyphenols Nutrition 0.000 abstract 1
- 229920001155 polypropylene Polymers 0.000 abstract 1
- 229920002223 polystyrene Polymers 0.000 abstract 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 abstract 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 abstract 1
- 229930182490 saponin Natural products 0.000 abstract 1
- 150000007949 saponins Chemical class 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 239000000271 synthetic detergent Substances 0.000 abstract 1
- LRBQNJMCXXYXIU-YIILYMKVSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)C(OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-YIILYMKVSA-N 0.000 abstract 1
- 150000003672 ureas Chemical class 0.000 abstract 1
- 239000000080 wetting agent Substances 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0203—Separating plastics from plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0217—Mechanical separating techniques; devices therefor
- B29B2017/0237—Mechanical separating techniques; devices therefor using density difference
- B29B2017/0244—Mechanical separating techniques; devices therefor using density difference in liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0217—Mechanical separating techniques; devices therefor
- B29B2017/0248—Froth flotation, i.e. wherein gas bubbles are attached to suspended particles in an aerated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/06—Unsaturated polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
-
- 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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- 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
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Sustainable Development (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8825373A JPS5037874A (enrdf_load_stackoverflow) | 1973-08-06 | 1973-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1451571A true GB1451571A (en) | 1976-10-06 |
Family
ID=13937688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2062174A Expired GB1451571A (en) | 1973-08-06 | 1974-05-09 | Method for separating polyvinyl chloride from a mixture of plastics by flotation |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5037874A (enrdf_load_stackoverflow) |
| DE (1) | DE2423364A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2240092B1 (enrdf_load_stackoverflow) |
| GB (1) | GB1451571A (enrdf_load_stackoverflow) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409212A (zh) * | 2019-01-07 | 2020-07-14 | 中南大学 | 一种基于氢氧化钙预处理的废旧混合塑料全优先浮选分离方法 |
| CN111409213A (zh) * | 2019-01-07 | 2020-07-14 | 中南大学 | 一种基于硫酸钙预处理的废旧混合塑料全优先浮选分离方法 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52137069U (enrdf_load_stackoverflow) * | 1976-04-14 | 1977-10-18 | ||
| US4617111A (en) * | 1985-07-26 | 1986-10-14 | Plastic Recycling Foundation, Inc. | Method for the separation of a mixture of polyvinyl chloride and polyethylene terephtalate |
| JP3626274B2 (ja) * | 1996-04-09 | 2005-03-02 | アイン・エンジニアリング株式会社 | 複合フィルムの再生処理方法及び装置 |
| JP2009269942A (ja) * | 2008-04-30 | 2009-11-19 | Japan Electric Cable Technology Center Inc | 樹脂粒子の分別方法及び分別装置 |
| CN105399983B (zh) * | 2015-12-09 | 2018-03-09 | 中南大学 | 一种混合塑料的分离方法 |
-
1973
- 1973-08-06 JP JP8825373A patent/JPS5037874A/ja active Pending
-
1974
- 1974-05-09 GB GB2062174A patent/GB1451571A/en not_active Expired
- 1974-05-14 DE DE2423364A patent/DE2423364A1/de active Pending
- 1974-05-15 FR FR7416906A patent/FR2240092B1/fr not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409212A (zh) * | 2019-01-07 | 2020-07-14 | 中南大学 | 一种基于氢氧化钙预处理的废旧混合塑料全优先浮选分离方法 |
| CN111409213A (zh) * | 2019-01-07 | 2020-07-14 | 中南大学 | 一种基于硫酸钙预处理的废旧混合塑料全优先浮选分离方法 |
| CN111409213B (zh) * | 2019-01-07 | 2021-07-09 | 中南大学 | 一种基于硫酸钙预处理的废旧混合塑料全优先浮选分离方法 |
| CN111409212B (zh) * | 2019-01-07 | 2021-07-09 | 中南大学 | 一种基于氢氧化钙预处理的废旧混合塑料全优先浮选分离方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2423364A1 (de) | 1975-02-20 |
| JPS5037874A (enrdf_load_stackoverflow) | 1975-04-08 |
| FR2240092B1 (enrdf_load_stackoverflow) | 1978-03-31 |
| FR2240092A1 (enrdf_load_stackoverflow) | 1975-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1473274A (en) | Method for separating a mixture of plastics | |
| GB1465536A (en) | Method for separating large-sized film-like plastics | |
| US3925200A (en) | Method for separation of mixture of plastics | |
| EP0275626A3 (en) | Method for separation of minerals by froth flotation | |
| GB1451571A (en) | Method for separating polyvinyl chloride from a mixture of plastics by flotation | |
| US2373305A (en) | Tungsten ore flotation | |
| MX9307313A (es) | Un proceso de separacion de cloruro de polivinilotereftalato de polietileno y producto. | |
| GB1444831A (en) | Method for separation of a mixture of a polyester and a cellulose derivative | |
| FR2265459A1 (enrdf_load_stackoverflow) | ||
| US5377844A (en) | Separation of normally hydrophobic plastic materials by froth flotation | |
| US2312466A (en) | Oxygen-bearing ore flotation | |
| FR2600644B1 (fr) | Proced e de separation d'aminoacides | |
| US2162494A (en) | Concentration of phosphate ores | |
| US2297664A (en) | Concentrating langbeinite | |
| US3926790A (en) | Flotation method for separation of mixture of plastics | |
| GB1307320A (en) | Process for the separation of sulphides | |
| FI73369C (fi) | Anvaendning av acyllaktylat som samlare vid flotation och foerfarande foer anrikning av icke-sulfidiska mineralier genom flotation. | |
| GB1412933A (en) | Method for the separation of a mixture of plastics | |
| US3675773A (en) | Flotation separation of glaserite from sodium chloride and other salts | |
| AU650557B2 (en) | Process for selective flotation of phosphorus minerals | |
| US4157296A (en) | Flotation process for fluoride minerals | |
| GB1220556A (en) | Flotation of fluoride ores | |
| GB672048A (en) | Improvements in or relating to guanidine salts | |
| US3933633A (en) | Method for separating vinyl chloride | |
| FR2423264A1 (fr) | Procede et agent de traitement pour la recuperation de charbon fin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |