WO1991000795A3 - Polystyrene recycling process - Google Patents

Polystyrene recycling process Download PDF

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Publication number
WO1991000795A3
WO1991000795A3 PCT/US1990/003646 US9003646W WO9100795A3 WO 1991000795 A3 WO1991000795 A3 WO 1991000795A3 US 9003646 W US9003646 W US 9003646W WO 9100795 A3 WO9100795 A3 WO 9100795A3
Authority
WO
WIPO (PCT)
Prior art keywords
waste
foamed polystyrene
paper
stream
delivered
Prior art date
Application number
PCT/US1990/003646
Other languages
French (fr)
Other versions
WO1991000795A2 (en
Inventor
George Trezek
Martin Stanczyk
Michael Grubbs
Original Assignee
Wte Corp
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 Wte Corp filed Critical Wte Corp
Publication of WO1991000795A2 publication Critical patent/WO1991000795A2/en
Publication of WO1991000795A3 publication Critical patent/WO1991000795A3/en

Links

Classifications

    • 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
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • 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
    • B29B2017/0251—Hydropulping for converting the material under the influence of water into a slurry, e.g. for separating laminated plastic from paper
    • 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
    • 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
    • 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)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

The invention comprises a method and apparatus for recycling foamed polystyrene from municipal solid waste and more particularly from fast food restaurant waste. A steady stream of waste is delivered to a flail mill for reducing particle size, a rotary trommel for eliminating undersized waste and a rotary air classifier for removing ''heavy'' waste from the stream. At this point, the waste stream comprises mostly paper and foamed polystyrene. The paper and foamed polystyrene are delivered to a water pulper which fiberizes the paper so that it can then be separated from the foamed polystyrene by passing it through a screen of selected mesh size to allow the water and paper pulp to pass through while retaining the foamed polystyrene.
PCT/US1990/003646 1989-07-07 1990-06-26 Polystyrene recycling process WO1991000795A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37674689A 1989-07-07 1989-07-07
US376,746 1989-07-07

Publications (2)

Publication Number Publication Date
WO1991000795A2 WO1991000795A2 (en) 1991-01-24
WO1991000795A3 true WO1991000795A3 (en) 1992-05-14

Family

ID=23486295

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/003646 WO1991000795A2 (en) 1989-07-07 1990-06-26 Polystyrene recycling process

Country Status (1)

Country Link
WO (1) WO1991000795A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120418A1 (en) * 1991-06-20 1992-12-24 Wacker Chemie Gmbh HARDENABLE ORGANO (POLY) SILOXANES
DE4330735A1 (en) * 1993-09-10 1995-03-16 Wacker Chemie Gmbh Organopolysiloxanes containing hydrophilic groups

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848813A (en) * 1973-03-09 1974-11-19 Us Interior Continuous process for mechanically separating materials contained in urban refuse
US4153207A (en) * 1973-02-22 1979-05-08 Manlio Cerroni Plant for the continuous production of paper-pulp from solid urban waste
US4815668A (en) * 1986-04-28 1989-03-28 Organ-Faser Technology Company N.V. Process and device for working up household, industrial and other similar waste

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153207A (en) * 1973-02-22 1979-05-08 Manlio Cerroni Plant for the continuous production of paper-pulp from solid urban waste
US3848813A (en) * 1973-03-09 1974-11-19 Us Interior Continuous process for mechanically separating materials contained in urban refuse
US4815668A (en) * 1986-04-28 1989-03-28 Organ-Faser Technology Company N.V. Process and device for working up household, industrial and other similar waste

Also Published As

Publication number Publication date
WO1991000795A2 (en) 1991-01-24

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