METHOD FOR RECYCLING A POLYAMIDE UNDER ACIDIC CONDITIONS
The invention relates to a method of recovery of the monomers from a polyamide (PA) of the AABB type comprising the following steps: - a) a product (P) comprising the polyamide (PA) is optionally comminuted; - b) an aqueous medium comprising water, the product (P) and an acid (Ac) having at least on...
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| creator | SERVEL, Clement TOURAUD, Franck JEOL, Stéphane |
| description | The invention relates to a method of recovery of the monomers from a polyamide (PA) of the AABB type comprising the following steps: - a) a product (P) comprising the polyamide (PA) is optionally comminuted; - b) an aqueous medium comprising water, the product (P) and an acid (Ac) having at least one pKa lower than 0 and selected in the group consisting of the nitrogen-free inorganic acids, methanesulfonic acid and combinations of two or more of these acids, is heated to induce the dissolution and the hydrolysis of the polyamide (PA); - c) a stream (S) comprising the diacid (A) and the diamine (B) in the form of a salt with the acid (Ac), recovered at the end of step b) is further processed in order to either separate and recover the diacid (A) and the diamine (B) (embodiment E1) or collect the salt formed by the diacid (A) and the diamine (B) (embodiment E2); wherein after step b), the method optionally comprises a recovery of the unreacted acid (Ac).
L'invention concerne un procédé de récupération des monomères d'un polyamide (PA) de type AABB, comprenant les étapes suivantes : a) un produit (P) comprenant le polyamide (PA) est éventuellement broyé ; b) un milieu aqueux comprenant de l'eau, le produit (P) et un acide (Ac) ayant au moins un pKa inférieur à 0 et choisi dans le groupe constitué par des acides inorganiques exempts d'azote, l'acide méthanesulfonique et des combinaisons de deux de ces acides ou plus, est chauffé pour induire la dissolution et l'hydrolyse du polyamide (PA) ; c) un courant (S) comprenant le diacide (A) et la diamine (B) sous la forme d'un sel avec l'acide (Ac), récupéré à l'issue de l'étape (b), est en outre traité afin de séparer et de récupérer le diacide (A) et la diamine (B) (mode de réalisation E1), ou de collecter le sel formé par le diacide (A) et la diamine (B) (mode de réalisation E2) ; après l'étape (b), le procédé comprend éventuellement une récupération de l'acide n'ayant pas réagi (Ac). |
| format | Patent |
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L'invention concerne un procédé de récupération des monomères d'un polyamide (PA) de type AABB, comprenant les étapes suivantes : a) un produit (P) comprenant le polyamide (PA) est éventuellement broyé ; b) un milieu aqueux comprenant de l'eau, le produit (P) et un acide (Ac) ayant au moins un pKa inférieur à 0 et choisi dans le groupe constitué par des acides inorganiques exempts d'azote, l'acide méthanesulfonique et des combinaisons de deux de ces acides ou plus, est chauffé pour induire la dissolution et l'hydrolyse du polyamide (PA) ; c) un courant (S) comprenant le diacide (A) et la diamine (B) sous la forme d'un sel avec l'acide (Ac), récupéré à l'issue de l'étape (b), est en outre traité afin de séparer et de récupérer le diacide (A) et la diamine (B) (mode de réalisation E1), ou de collecter le sel formé par le diacide (A) et la diamine (B) (mode de réalisation E2) ; après l'étape (b), le procédé comprend éventuellement une récupération de l'acide n'ayant pas réagi (Ac).</description><language>eng ; fre</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G ; CHEMISTRY ; COMPOSITIONS BASED THEREON ; GENERAL PROCESSES OF COMPOUNDING ; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ; METALLURGY ; ORGANIC CHEMISTRY ; ORGANIC MACROMOLECULAR COMPOUNDS ; THEIR PREPARATION OR CHEMICAL WORKING-UP ; WORKING-UP</subject><creationdate>2024</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240104&DB=EPODOC&CC=WO&NR=2024002975A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20240104&DB=EPODOC&CC=WO&NR=2024002975A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SERVEL, Clement</creatorcontrib><creatorcontrib>TOURAUD, Franck</creatorcontrib><creatorcontrib>JEOL, Stéphane</creatorcontrib><title>METHOD FOR RECYCLING A POLYAMIDE UNDER ACIDIC CONDITIONS</title><description>The invention relates to a method of recovery of the monomers from a polyamide (PA) of the AABB type comprising the following steps: - a) a product (P) comprising the polyamide (PA) is optionally comminuted; - b) an aqueous medium comprising water, the product (P) and an acid (Ac) having at least one pKa lower than 0 and selected in the group consisting of the nitrogen-free inorganic acids, methanesulfonic acid and combinations of two or more of these acids, is heated to induce the dissolution and the hydrolysis of the polyamide (PA); - c) a stream (S) comprising the diacid (A) and the diamine (B) in the form of a salt with the acid (Ac), recovered at the end of step b) is further processed in order to either separate and recover the diacid (A) and the diamine (B) (embodiment E1) or collect the salt formed by the diacid (A) and the diamine (B) (embodiment E2); wherein after step b), the method optionally comprises a recovery of the unreacted acid (Ac).
L'invention concerne un procédé de récupération des monomères d'un polyamide (PA) de type AABB, comprenant les étapes suivantes : a) un produit (P) comprenant le polyamide (PA) est éventuellement broyé ; b) un milieu aqueux comprenant de l'eau, le produit (P) et un acide (Ac) ayant au moins un pKa inférieur à 0 et choisi dans le groupe constitué par des acides inorganiques exempts d'azote, l'acide méthanesulfonique et des combinaisons de deux de ces acides ou plus, est chauffé pour induire la dissolution et l'hydrolyse du polyamide (PA) ; c) un courant (S) comprenant le diacide (A) et la diamine (B) sous la forme d'un sel avec l'acide (Ac), récupéré à l'issue de l'étape (b), est en outre traité afin de séparer et de récupérer le diacide (A) et la diamine (B) (mode de réalisation E1), ou de collecter le sel formé par le diacide (A) et la diamine (B) (mode de réalisation E2) ; après l'étape (b), le procédé comprend éventuellement une récupération de l'acide n'ayant pas réagi (Ac).</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS BASED THEREON</subject><subject>GENERAL PROCESSES OF COMPOUNDING</subject><subject>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><subject>ORGANIC MACROMOLECULAR COMPOUNDS</subject><subject>THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><subject>WORKING-UP</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2024</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLDwdQ3x8HdRcPMPUghydY509vH0c1dwVAjw94l09PV0cVUI9XNxDVJwdPZ08XRWcPb3c_EM8fT3C-ZhYE1LzClO5YXS3AzKbq4hzh66qQX58anFBYnJqXmpJfHh_kYGRiYGBkaW5qaOhsbEqQIA6wMpLw</recordid><startdate>20240104</startdate><enddate>20240104</enddate><creator>SERVEL, Clement</creator><creator>TOURAUD, Franck</creator><creator>JEOL, Stéphane</creator><scope>EVB</scope></search><sort><creationdate>20240104</creationdate><title>METHOD FOR RECYCLING A POLYAMIDE UNDER ACIDIC CONDITIONS</title><author>SERVEL, Clement ; TOURAUD, Franck ; JEOL, Stéphane</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_WO2024002975A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2024</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>GENERAL PROCESSES OF COMPOUNDING</topic><topic>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><topic>WORKING-UP</topic><toplevel>online_resources</toplevel><creatorcontrib>SERVEL, Clement</creatorcontrib><creatorcontrib>TOURAUD, Franck</creatorcontrib><creatorcontrib>JEOL, Stéphane</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SERVEL, Clement</au><au>TOURAUD, Franck</au><au>JEOL, Stéphane</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD FOR RECYCLING A POLYAMIDE UNDER ACIDIC CONDITIONS</title><date>2024-01-04</date><risdate>2024</risdate><abstract>The invention relates to a method of recovery of the monomers from a polyamide (PA) of the AABB type comprising the following steps: - a) a product (P) comprising the polyamide (PA) is optionally comminuted; - b) an aqueous medium comprising water, the product (P) and an acid (Ac) having at least one pKa lower than 0 and selected in the group consisting of the nitrogen-free inorganic acids, methanesulfonic acid and combinations of two or more of these acids, is heated to induce the dissolution and the hydrolysis of the polyamide (PA); - c) a stream (S) comprising the diacid (A) and the diamine (B) in the form of a salt with the acid (Ac), recovered at the end of step b) is further processed in order to either separate and recover the diacid (A) and the diamine (B) (embodiment E1) or collect the salt formed by the diacid (A) and the diamine (B) (embodiment E2); wherein after step b), the method optionally comprises a recovery of the unreacted acid (Ac).
L'invention concerne un procédé de récupération des monomères d'un polyamide (PA) de type AABB, comprenant les étapes suivantes : a) un produit (P) comprenant le polyamide (PA) est éventuellement broyé ; b) un milieu aqueux comprenant de l'eau, le produit (P) et un acide (Ac) ayant au moins un pKa inférieur à 0 et choisi dans le groupe constitué par des acides inorganiques exempts d'azote, l'acide méthanesulfonique et des combinaisons de deux de ces acides ou plus, est chauffé pour induire la dissolution et l'hydrolyse du polyamide (PA) ; c) un courant (S) comprenant le diacide (A) et la diamine (B) sous la forme d'un sel avec l'acide (Ac), récupéré à l'issue de l'étape (b), est en outre traité afin de séparer et de récupérer le diacide (A) et la diamine (B) (mode de réalisation E1), ou de collecter le sel formé par le diacide (A) et la diamine (B) (mode de réalisation E2) ; après l'étape (b), le procédé comprend éventuellement une récupération de l'acide n'ayant pas réagi (Ac).</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ACYCLIC OR CARBOCYCLIC COMPOUNDS AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP |
| title | METHOD FOR RECYCLING A POLYAMIDE UNDER ACIDIC CONDITIONS |
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