ATE175183T1 - Verfahren zum trennen von cyclohexandimethylol und dimethylterephthalate - Google Patents

Verfahren zum trennen von cyclohexandimethylol und dimethylterephthalate

Info

Publication number
ATE175183T1
ATE175183T1 AT94930681T AT94930681T ATE175183T1 AT E175183 T1 ATE175183 T1 AT E175183T1 AT 94930681 T AT94930681 T AT 94930681T AT 94930681 T AT94930681 T AT 94930681T AT E175183 T1 ATE175183 T1 AT E175183T1
Authority
AT
Austria
Prior art keywords
separating
cyclohexanedimethylol
chdm
dmt
pet
Prior art date
Application number
AT94930681T
Other languages
English (en)
Inventor
William Herbert Heise
Daniel Paul Folk
Cheuk Chung Yau
Chester Wayne Sink
Original Assignee
Eastman Chem Co
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 Eastman Chem Co filed Critical Eastman Chem Co
Application granted granted Critical
Publication of ATE175183T1 publication Critical patent/ATE175183T1/de

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7007—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/701—Longitudinal elements with a non-circular, e.g. rectangular, cross-section
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7038—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other to a different extent in different directions, e.g. within one plane only
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/03—Preparation of carboxylic acid esters by reacting an ester group with a hydroxy group
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/48—Separation; Purification; Stabilisation; Use of additives
    • C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/48—Separation; Purification; Stabilisation; Use of additives
    • C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7055—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant connected to sacrum, pelvis or skull
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
AT94930681T 1993-10-22 1994-10-11 Verfahren zum trennen von cyclohexandimethylol und dimethylterephthalate ATE175183T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/139,672 US5498749A (en) 1993-10-22 1993-10-22 Process for separating cyclohexane dimethanol from dimethyl terephthalate

Publications (1)

Publication Number Publication Date
ATE175183T1 true ATE175183T1 (de) 1999-01-15

Family

ID=22487768

Family Applications (1)

Application Number Title Priority Date Filing Date
AT94930681T ATE175183T1 (de) 1993-10-22 1994-10-11 Verfahren zum trennen von cyclohexandimethylol und dimethylterephthalate

Country Status (7)

Country Link
US (1) US5498749A (de)
EP (1) EP0724559B1 (de)
JP (1) JPH09504025A (de)
AT (1) ATE175183T1 (de)
CA (1) CA2173991A1 (de)
DE (1) DE69415686D1 (de)
WO (1) WO1995011218A1 (de)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1510514A4 (de) * 2002-06-04 2006-03-08 Aies Co Ltd Verfahren zur aufreinigung von bis(2 hydroxyethyl)terephthalat
JP5178211B2 (ja) * 2008-01-22 2013-04-10 帝人株式会社 ペットボトル廃棄物より色相を改善したテレフタル酸ジメチルを回収する方法
US20120214961A1 (en) * 2011-02-22 2012-08-23 Sabic Innovative Plastics Ip B.V. Poly(butylene terephthalate) ester compositions, methods of manufacture, and articles thereof
US20120214914A1 (en) * 2011-02-22 2012-08-23 Sabic Innovative Plastics Ip B.V. Flame retardant poly(butylene terephthalate) ester compositions, methods of manufacture, and articles thereof
US20120214913A1 (en) * 2011-02-22 2012-08-23 Sabic Innovative Plastics Ip B.V. Impact modified poly(butylene terephthalate) ester compositions, methods of manufacture, and articles thereof
US8933162B2 (en) 2011-07-15 2015-01-13 Saudi Basic Industries Corporation Color-stabilized biodegradable aliphatic-aromatic copolyesters, methods of manufacture, and articles thereof
US8877862B2 (en) 2011-07-15 2014-11-04 Saudi Basic Industries Corporation Method for color stabilization of poly(butylene-co-adipate terephthalate
US9334360B2 (en) 2011-07-15 2016-05-10 Sabic Global Technologies B.V. Color-stabilized biodegradable aliphatic-aromatic copolyesters, methods of manufacture, and articles thereof
US10000588B2 (en) 2011-07-28 2018-06-19 Eastman Chemical Company Coating for the inner surface of plastic bottles for protection against degradation from volatile organic compounds
US20130029068A1 (en) 2011-07-28 2013-01-31 Eastman Chemical Company Extrusion blow molded articles
WO2013025186A1 (en) 2011-08-12 2013-02-21 Eastman Chemical Company Process for the preparation of polyesters with high recycle content
US8946345B2 (en) 2011-08-30 2015-02-03 Saudi Basic Industries Corporation Method for the preparation of (polybutylene-co-adipate terephthalate) through the in situ phosphorus containing titanium based catalyst
US8889820B2 (en) 2012-02-15 2014-11-18 Saudi Basic Industries Corporation Amorphous, high glass transition temperature copolyester compositions, methods of manufacture, and articles thereof
US8895660B2 (en) 2012-03-01 2014-11-25 Saudi Basic Industries Corporation Poly(butylene-co-adipate terephthalate), method of manufacture, and uses thereof
US9034983B2 (en) 2012-03-01 2015-05-19 Saudi Basic Industries Corporation Poly(butylene-co-adipate terephthalate), method of manufacture and uses thereof
US8901243B2 (en) 2012-03-30 2014-12-02 Saudi Basic Industries Corporation Biodegradable aliphatic-aromatic copolyesters, methods of manufacture, and articles thereof
WO2015095126A1 (en) 2013-12-20 2015-06-25 Hartdegen Vernon Polyaxial locking hole
US11202626B2 (en) 2014-07-10 2021-12-21 Crossroads Extremity Systems, Llc Bone implant with means for multi directional force and means of insertion
EP3166522B1 (de) 2014-07-10 2019-11-20 Crossroads Extremity Systems, LLC Knochenimplantat und einsetzvorrichtung
EP3012244A1 (de) * 2014-10-24 2016-04-27 Sulzer Chemtech AG Verfahren und Vorrichtung zur Reinigung von Acrylsäure
EP3563785B1 (de) 2015-07-13 2023-11-01 Crossroads Extremity Systems, LLC Knochenplatten mit dynamischen elementen
US11864753B2 (en) 2017-02-06 2024-01-09 Crossroads Extremity Systems, Llc Implant inserter
EP3579762A4 (de) 2017-02-07 2021-04-07 Crossroads Extremity Systems, LLC Gegendrehmoment-implantat
KR20220041177A (ko) 2019-07-29 2022-03-31 이스트만 케미칼 컴파니 열분해 및 가메탄올분해로부터의 재활용된 단량체를 갖는 폴리에스테르의 제조 방법
KR20220119660A (ko) 2019-12-20 2022-08-30 이스트만 케미칼 컴파니 Pet 가메탄올분해를 위한 촉매
CN112321394A (zh) * 2020-11-06 2021-02-05 艾凡佳德(上海)环保科技有限公司 一种从回收液中得到乙二醇和二甘醇的方法及设备
USD961081S1 (en) 2020-11-18 2022-08-16 Crossroads Extremity Systems, Llc Orthopedic implant
WO2023059579A1 (en) 2021-10-06 2023-04-13 Eastman Chemical Company Production of virgin-quality pet and copolyester raw materials from polyester carpet fibers

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954151C (de) * 1954-03-06 1956-12-13 Basf Ag Verfahren zur Reinigung von Terephthalsaeureestern
US3037050A (en) * 1955-08-05 1962-05-29 Glanzstoff Ag Regeneration of terephthalic acid dimethyl ester from polyethylene terephthalate
NL296330A (de) * 1962-08-17 1900-01-01
DE1247291B (de) * 1964-04-28 1967-08-17 Schwarza Chemiefaser Verfahren und Vorrichtung zur Herstellung von Dialkylterephthalaten durch Abbau von Polyaethylenglykolterephthalaten
US3502711A (en) * 1966-10-17 1970-03-24 Exxon Research Engineering Co Purification of dimethylterephthalate
US3488298A (en) * 1966-12-01 1970-01-06 Eastman Kodak Co Polyester scrap recovery processes
AT279547B (de) * 1967-04-14 1970-03-10 Buchs Metallwerk Ag Verfahren und Vorrichtung zur Trennung oder Reinigung schmelzflüssiger, flüssiger oder gelöster Stoffe durch fraktioniertes Kristallisieren
CH550753A (it) * 1970-11-26 1974-06-28 Sir Soc Italiana Resine Spa Procedimento per la depolimerizzazione di polietilentereftalato.
US3701741A (en) * 1971-02-01 1972-10-31 Eastman Kodak Co Purification of impure scrap poly(ethylene terephthalate)
OA05495A (fr) * 1975-12-16 1981-04-30 Rhone Poulenc Textile Procédé d'obtention de TEREPHTALATE de DIMETHYLE à partir de déchets de polyester.
DE3430555A1 (de) * 1984-08-20 1986-02-27 Hoechst Ag, 6230 Frankfurt Verfahren zur abtrennung von dimethylisophthalat und dimethylorthophthalat aus ihrem gemisch mit dimethylterephthalat
US4578502A (en) * 1985-01-22 1986-03-25 Cudmore Warner J G Polyethylene terephthalate saponification process
US5051528A (en) * 1990-04-24 1991-09-24 Eastman Kodak Company Recovery process for ethylene glycol and dimethylterephthalate
CA2055066A1 (en) * 1990-11-09 1992-05-10 Robert E. Michel Recovery of methyl esters of aromatic acids and glycols from thermoplastic polyester scrap

Also Published As

Publication number Publication date
EP0724559A1 (de) 1996-08-07
EP0724559B1 (de) 1998-12-30
DE69415686D1 (de) 1999-02-11
JPH09504025A (ja) 1997-04-22
WO1995011218A1 (en) 1995-04-27
US5498749A (en) 1996-03-12
CA2173991A1 (en) 1995-04-27

Similar Documents

Publication Publication Date Title
ATE175183T1 (de) Verfahren zum trennen von cyclohexandimethylol und dimethylterephthalate
ATE223456T1 (de) Glykolyseverfahren zur recyclierung von pet- abfall
DE60042656D1 (de) Verfahren zur abtrennung und rückgewinnung von dimethylterephthalat und ethylenglykol aus polyesterabfällen
KR850008352A (ko) 폴리에스테르 부스러기(屑)의 해중합(解重合)방법
KR960041251A (ko) 중합체 혼합물로부터 폴리에스테르 중합체를 회수하는 위한 방법
ATE164549T1 (de) Kunststoffolie, verfahren zu ihrer herstellung und formkörper, die die folie enthalten
DE69725129D1 (de) Verfahren zur deaktivierung des katalysators bei der kontinuierlichen herstellung von polyethylenterephthalat
KR960704962A (ko) 폴리에스테르의 연속 제조방법(continuous polyester process)
DE69325803D1 (de) Säuberung von polyethylene terephthalaten
ATE120755T1 (de) Verfahren zum raffinieren organischer lösungsmittel enthaltende rohe produkte aus einem polyol-fettsäure-veresterungsgemisch.
DE59005469D1 (de) Verfahren zur herstellung von dmt-zwischenprodukt bestimmter reinheit sowie dessen weiterverarbeitung zu reinst-dmt und/oder mittel- oder hochreiner terephthalsäure.
ATE486839T1 (de) Recycling von in polyethylennaphthalat enthaltener 2,6-naphthalindicarbonsäure (2,6-nda) in einem verfahren zur herstellung von diestern
DE69407872D1 (de) Verfahren zur Gewinnung von Dimethylnaphthalen-2,6-dicarboxylat
EP0787708B1 (de) Rückgewinnung von Glycolen aus Glycol enthaltenden Lösungen aus der Depolymerisierung von Polyestern
ATE165075T1 (de) Verfahren zur herstellung von phenylterephthalsäure
KR970074820A (ko) 폴리에스테르 수지를 제조하는 방법
ATE136043T1 (de) Verfahren zur herstellung von ethylen- alkylcarbonsäurevinylester-mischpolymerisaten
DE69509252T2 (de) Verfahren zur wiederverwertung von aminocarbonsäuren-abfall in amidocarbonsäuren
GB9711484D0 (en) Recovery of products from toluenediisocyanate residues
US3037048A (en) Process for the purification of crude dimethyl terephthalate
DE3770890D1 (de) Verfahren zur isomerisierung von unverzweigten kohlenwasserstoffen.
DE59602549D1 (de) Verfahren zur aufarbeitung von dihydroxyverbindungen enthaltenden rückständen
ATE144491T1 (de) Verfahren zur rückgewinnung von ethylenglykol aus polyethylenterephthalatherstellung
JP2002060543A5 (de)
RU96123887A (ru) Способ ингибирования процесса термополимеризации и смолообразования непредельных углеводородов

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties