[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-322689-105":59,"doc-detail-322689-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","process-for-the-chemical-decomposition-of-high-molecular-weight-polyester-or-mixed-polyester-waste","Process for the Chemical Decomposition of High Molecular Weight Polyester or Mixed Polyester Waste","","Patent translation for a chemical recycling process that decomposes high molecular weight polyester or mixed polyester waste, especially polyethylene terephthalate produced during fiber or film manufacturing. The method uses alcoholically dissolved phosphoric acid ester to chemically decompose the waste, then applies a brief vacuum step after termination of the reaction to act on the molten material and remove escaping volatile components by suction. The disclosed aim is to reduce discoloration while enabling decomposition conditions with an optimized effect.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/process-for-the-chemical-decomposition-of-high-molecular-weight-polyester-or-mixed-polyester-waste/322689/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/process-for-the-chemical-decomposition-of-high-molecular-weight-polyester-or-mixed-polyester-waste/322689.png","ImageObject",300,407,{"name":92,"@type":93},"Asher","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-23","2026-09-21",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What materials does the process target?","Question",{"text":112,"@type":113},"It targets chemical decomposition of high molecular weight polyester or mixed polyester waste, especially polyethylene terephthalate waste formed during production of fibers or films.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is the decomposition carried out?",{"text":117,"@type":113},"The polyester (or mixed polyester) waste is decomposed chemically by an alcoholically dissolved phosphoric acid ester, with subsequent handling of the decomposed molten waste under vacuum.",{"name":119,"@type":110,"acceptedAnswer":120},"What problem does the invention aim to solve?",{"text":121,"@type":113},"The invention aims to reduce discoloration and simultaneously increase the quality of the decomposed product, addressing disadvantages of prior processes that still leave discolored products affecting downstream textile fiber or film production.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},322689,1790170963,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":36,"preview_page_count":4},687197207639,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","Lohmann,P.,and others  \n# Process for the chemical decomposi-tion of high molecular weight polyesteror mixed polyester waste.6 p.\n\nPatent(East German)No.206677(1984).Filed:  TRANSLATION NO.4547  \nT R A N S L A T I 0 N  \nEAST GERMAN PATENT NO.206677  \nIntern ational C1assification³:C 08 J 11/04C 08 G 63/16  \nWP C 08 J/2346403  \nEconomic Patent ISSN 0433-6461,granted according to Section 29,paragraph 1 of the Patent Law.  Date of application:November 5,1981.  Date of issue:Febru ary 1,1984.  \nTitle:  \nPROCESS FOR THE CHEMICAL DECOMPOSITION OF HIGH MOLECULAR WEIGHTPOLYESTER OR MIXED POLYESTER MASTE.  \nPatentee:See inventors.  \nRepresentative:VEB Chemiefaserwerk Guben,  \n\"Herbert Warnke\"Abt.Schutzr.und Neuererw.7560 WPST Guben Strasse D.Chemiearbeiter.  \nInventors:  \nPeter Lohmann,Herbert Fechtner,Kurt Markel,Walter Knob1och,and Gerhard Schaller.  \nThe invention relates to a process for the chemicaldecomposition of high molecular weight polyester or mixedpolyester waste formed during the production of fibers orfi1ms.  The goal of the invention is to_reduce the dis-coloration of the decomposed product.   The object of theinvention is to create a process for the chemical de-composition of high molecular weight polyester or mixedpolyester waste that en ables the decomposition reactionto be influenced with a particular aim in mind and anoptimum decomposition effect.  The solution of the inven-tion provides for a process in which the polyester ormixed polyester waste is decompo sed chemical1y by analcoholical1y dissolved phosphoric acid ester,the decom-posed molten waste is acted upon by a vacuum in therange of 6665 to 53320 Pa for a short time after thedecomposition reaction has terminated,and the volatilecomponents escaping from the melt are drawn off bysuction.  \nDigitized by the Internet Archivein 2019  \nhttps://archive.org/details/processforchemic00lohm  \n## Scope of the Invention\n\nThe invention relates to a process for the chemical decompo-sition of high molecular weight polyester or mixed polyester  \nwaste,especial1y polyethylene terephthalate waste,that is formedduring the production of fibers or films and that is to berecycled for reuse in polymer production.  \n## Characteristics of the Known Technical Solutions\n\nThe conversion into low molecular weight products and thereuse in polymer production of the waste occurring in the produc-tion and further processing of polymers to form filaments andfibers,by melting the waste in an extrusion device in thepresence of one or more chemical compounds,are known.  \nIn British Patent 1254209 a process for the reuse of poly-ester resin is suggested in which high molecular weight polyesterresin is mixed with a regenerating agent in an extrusion deviceand is subjected to a decomposition reaction at temperatures be-tween 260 to 320°C and excess pressure to form a low molecularweight product.The chemical compounds used as regeneratingagents are water,g1ycols,dicarboxylic acids,and dicarboxylicacid esters.  They are added to the product to be decomposed,individu al1y or as a mixture.  \nFor the decomposition of high molecular weight polyethyleneterephthalate waste it is suggested that preferably water,  \nethylene glycol,terephthalic acid,or dimethyl terephthalate beused as the regenerating agent.  \nIt can be inferred on p.4 of the Description of the Inven-tion that the residence time in the extrusion device required forthe decomposition reaction is 1 to 3 min.  \nIt is said that the decomposed product exhibiting a lowmolecular weight can be reused for the production of high molecu-lar weight polyester resin.  It is suggested that the decomposedproduct be mixed with glycol esters or precondensate and that thenthis mixture be polycondensed to form a high molecular weightproduct.  The percentage of decomposed product mixed with the pre-polycondensate is given as 20%,whereby it is pointed out that incases in which the 1ow molecular weight decomposition product isvery discolored,lower percentages are t","cbCailLK9t2YW5pX","https://ap.wps.com/l/cbCailLK9t2YW5pX","pdf",522808,16,"English","# Scope of the Invention\n## Characteristics of the Known Technical Solutions\n# Goal of the Invention\n# Statement of the Nature of the Invention","[{\"question\":\"What materials does the process target?\",\"answer\":\"It targets chemical decomposition of high molecular weight polyester or mixed polyester waste, especially polyethylene terephthalate waste formed during production of fibers or films.\"},{\"question\":\"How is the decomposition carried out?\",\"answer\":\"The polyester (or mixed polyester) waste is decomposed chemically by an alcoholically dissolved phosphoric acid ester, with subsequent handling of the decomposed molten waste under vacuum.\"},{\"question\":\"What problem does the invention aim to solve?\",\"answer\":\"The invention aims to reduce discoloration and simultaneously increase the quality of the decomposed product, addressing disadvantages of prior processes that still leave discolored products affecting downstream textile fiber or film production.\"}]","Process for the Chemical Decomposition of High Molecular Weight Polyester or Mixed Polyester Waste | PDF",1789963319]