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HK1006816A1 - Method of separating polyethylene (pe) and polypropylene (pp) - Google Patents

Method of separating polyethylene (pe) and polypropylene (pp) Download PDF

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Publication number
HK1006816A1
HK1006816A1 HK98105941A HK98105941A HK1006816A1 HK 1006816 A1 HK1006816 A1 HK 1006816A1 HK 98105941 A HK98105941 A HK 98105941A HK 98105941 A HK98105941 A HK 98105941A HK 1006816 A1 HK1006816 A1 HK 1006816A1
Authority
HK
Hong Kong
Prior art keywords
plastics
mixture
prior
mature
mineral acid
Prior art date
Application number
HK98105941A
Other languages
German (de)
English (en)
Chinese (zh)
Other versions
HK1006816B (en
Inventor
Stahl Ingo
Hollstein Axel
Kleine-Kleffmann Ulrich
Geisler Iring
Neitzel Ulrich
Original Assignee
Kali Und Salz Beteiligungs Aktiengesellschaft
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 Kali Und Salz Beteiligungs Aktiengesellschaft filed Critical Kali Und Salz Beteiligungs Aktiengesellschaft
Publication of HK1006816A1 publication Critical patent/HK1006816A1/xx
Publication of HK1006816B publication Critical patent/HK1006816B/xx

Links

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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C7/00—Separating solids from solids by electrostatic effect
    • 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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C7/00—Separating solids from solids by electrostatic effect
    • B03C7/003—Pretreatment of the solids prior to electrostatic separation
    • 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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C7/00—Separating solids from solids by electrostatic effect
    • B03C7/006—Charging without electricity supply, e.g. by tribo-electricity or pyroelectricity
    • 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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C7/00—Separating solids from solids by electrostatic effect
    • B03C7/02—Separators
    • B03C7/12—Separators with material falling free
    • 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
    • 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
    • B29B2017/0262—Specific separating techniques using electrical caracteristics
    • B29B2017/0265—Electrostatic separation
    • 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
    • B29B2017/0286—Cleaning means used for separation
    • B29B2017/0289—Washing the materials in liquids
    • 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
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/753—Medical equipment; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/753—Medical equipment; Accessories therefor
    • B29L2031/7544—Injection needles, syringes
    • 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

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Materials For Medical Uses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Claims (10)

  1. Procédé de séparation de particules d'un mélange de matières plastiques de nature chimique différente, qui ont cependant à peu près le même domaine de densité, par exemple de polyéthylène (PE) et de polypropylène (PP), par un procédé de séparation par voie électrostatique, le mélange de matières plastiques étant chargé triboélectriquement au moyen d'un séparateur à chute libre avant le triage, caractérisé en ce qu'il consiste à traiter superficiellement le mélange de matières plastiques avant de le charger triboélectriquement en le mettant en contact intense avec un acide minéral ou une lessive alcaline et ensuite, en le lavant à l'eau et en le séchant.
  2. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à utiliser, comme acide minéral, de l'acide chlorhydrique dilué.
  3. Procédé suivant la revendication 2, caractérisé en ce qu'il consiste à choisir la dilution de l'acide chlorhydrique de manière à obtenir un pH de 3 environ.
  4. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à utiliser de la lessive de soude diluée comme lessive alcaline.
  5. Procédé suivant la revendication 4, caractérisé en ce qu'il consiste à choisir la dilution de la lessive de soude de manière à obtenir un pH de 11 à 12 environ.
  6. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à soumettre le produit séché à 2 % environ, juste avant de le charger par voie triboélectrique, à un traitement en température séparée entre 70 et 100°C pendant une durée d'au moins 5 minutes et ensuite à ajouter au mélange de 10 à 50 mg d'acide gras par kg du mélange.
  7. Procédé suivant la revendication 1 ou 6, caractérisé en ce qu'il consiste à effectuer la charge par voie triboélectrique après un refroidissement du produit traité entre 15°C et 50°C, de préférence entre 20 et 25°C.
  8. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à faire fonctionner le séparateur en chute libre à des intensités de champ de 2 à 3 kV/cm.
  9. Procédé suivant la revendication 1, 2, 3 ou 4 et 5, caractérisé en ce qu'il consiste à ajouter l'acide minéral ou la lessive alcaline à de l'eau de nettoyage.
  10. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à mettre avant la séparation le produit dans un lit fluidisé, à l'envoyer dans une vis convoyeuse de longueur suffisante ou à le transporter pneumatiquement sur une certaine étendue.
HK98105941.2A 1991-08-21 1992-07-04 Method of separating polyethylene (pe) and polypropylene (pp) HK1006816B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4127574 1991-08-21
DE4127574A DE4127574C1 (fr) 1991-08-21 1991-08-21
PCT/EP1992/001614 WO1993003852A1 (fr) 1991-08-21 1992-07-04 Procede pour la separation du polyethylene (pe) et du polypropylene (pp)

Publications (2)

Publication Number Publication Date
HK1006816A1 true HK1006816A1 (en) 1999-03-19
HK1006816B HK1006816B (en) 1999-03-19

Family

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Also Published As

Publication number Publication date
DE4127574C1 (fr) 1993-03-11
CA2094034C (fr) 2003-06-17
CA2094034A1 (fr) 1993-02-22
HU214930B (hu) 1998-07-28
DE59206567D1 (de) 1996-07-18
AU654578B2 (en) 1994-11-10
HU9301176D0 (en) 1993-08-30
SK279157B6 (sk) 1998-07-08
BR9205325A (pt) 1993-11-23
RU2091223C1 (ru) 1997-09-27
CZ66993A3 (en) 1994-01-19
ES2090670T3 (es) 1996-10-16
WO1993003852A1 (fr) 1993-03-04
KR100221218B1 (ko) 1999-09-15
PL298861A1 (en) 1993-10-18
US5370235A (en) 1994-12-06
KR930702076A (ko) 1993-09-08
CZ282226B6 (cs) 1997-06-11
DK0553320T3 (da) 1996-11-18
JPH06502123A (ja) 1994-03-10
ATE139148T1 (de) 1996-06-15
EP0553320B1 (fr) 1996-06-12
HUT64251A (en) 1993-12-28
EP0553320A1 (fr) 1993-08-04
AU2344692A (en) 1993-03-16
JPH0815572B2 (ja) 1996-02-21
PL168598B1 (pl) 1996-03-29
GR3020772T3 (en) 1996-11-30
SK51593A3 (en) 1993-08-11

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20040704