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公开(公告)号：US11186721B2
公开(公告)日：2021-11-30
申请号：US15540513
申请日：2014-12-29
申请人： Braskem S.A.
发明人： Dihogenes Adriano Pozzer , Olavo Martins Junior , Alessandra Coelho Silva Lucas , Fernando Silveira
摘要： A process for treatment of nanoparticles of mineral filler for obtaining processed nanoparticles for use in polymerization in the presence of nanoparticles which includes the steps of (a) drying a mineral filler with an inert gas to remove catalyst poisons; (b) mixing the mineral filler dried obtained in step (a) with a swelling agent in a liquid state or near a critical state or in the supercritical state; (c) subjecting the swelling agent of the mixture obtained in step (b) to an endoenthalpic or isoentalphic phase change by altering the conditions of the temperature and/or pressure; (d) subjecting the nanoparticles of the mixture obtained in step (c) to contact of scavenging agent to react with catalyst poisons; then the mixture obtained in step (d) can be dried in a step (e) with an inert gas to remove sub-products from scavenging agent and catalyst poisons to obtain the treated nanoparticles.
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公开(公告)号：US11352375B2
公开(公告)日：2022-06-07
申请号：US16729032
申请日：2019-12-27
申请人： Braskem S.A.
IPC分类号： C07F5/06
摘要： A method of forming polymerization auxiliaries for a polymerization process may include combining an antifouling agent with a killer agent to form an auxiliary composition; and contacting the auxiliary composition with an alkylaluminum. An antifouling complex may be produced by combining an antifouling agent with a killer agent to form an auxiliary composition; and contacting the auxiliary composition with an alkylaluminum.
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公开(公告)号：US20200207791A1
公开(公告)日：2020-07-02
申请号：US16729032
申请日：2019-12-27
申请人： Braskem S.A.
IPC分类号： C07F5/06
摘要： A method of forming polymerization auxiliaries for a polymerization process may include combining an antifouling agent with a killer agent to form an auxiliary composition; and contacting the auxiliary composition with an alkylaluminum. An antifouling complex may be produced by combining an antifouling agent with a killer agent to form an auxiliary composition; and contacting the auxiliary composition with an alkylaluminum.
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4.发明授权公开(公告)号：US11059770B2
公开(公告)日：2021-07-13
申请号：US16471201
申请日：2017-12-19
申请人： Braskem S.A.
IPC分类号： C07C67/56 , C08F6/00 , B01J20/34 , C08F218/08 , C07C69/15
摘要： Process for purification of unreacted vinyl acetate monomers comprising the steps of preliminarily loading an adsorbent agent bed with a mixture comprising an inert gas and fresh vinyl acetate; and feeding said adsorbent agent bed with unreacted vinyl acetate monomers to remove acetic acid.
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公开(公告)号：US20200207886A1
公开(公告)日：2020-07-02
申请号：US16728772
申请日：2019-12-27
申请人： Braskem S.A.
摘要： Methods of adding a catalyst to a bulk polymerization process may include mixing the catalyst with propylene to form a catalyst mixture that is substantially free of any C20 or greater hydrocarbons, feeding the catalyst mixture into a polymerization reactor, activating the catalyst mixture; and performing a polymerization on the catalyst mixture in the polymerization reactor. Polymers may be formed by polymerization processes that are substantially free of any C20 or greater hydrocarbons.
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公开(公告)号：US20220411545A1
公开(公告)日：2022-12-29
申请号：US17850489
申请日：2022-06-27
申请人： Braskem S.A.
发明人： Olavo Martins Junior , Dihogenes Adriano Pozzer , Élita Cavalli , Thiago Roberto Almeida , Bryan Dawson
IPC分类号： C08F110/06 , C08F4/659 , C08F2/01
摘要： A process for propylene preliminary polymerization in liquid phase that occurs in a continuous preliminary polymerization reactor may include feeding a propylene monomer and a Ziegler-Natta catalyst system having (a) a pro-catalyst having an internal electron donor comprising a substituted phenylene aromatic diester, (b) a catalyst activator and optionally (c) an external donor, into the continuous preliminary polymerization reactor, wherein the feeding is carried out without pre-contact of the pro-catalyst with the catalyst activator, and also without pre-contact of the catalyst activator with the propylene monomer before entering the continuous preliminary polymerization reactor.
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公开(公告)号：US20200207951A1
公开(公告)日：2020-07-02
申请号：US16728802
申请日：2019-12-27
申请人： Braskem S.A.
发明人： Olavo Martins Junior , Dihogenes Adriano Pozzer , Élita Cavalli , Adriano Giraldi Fisch , Roberto Osório Jimenez
摘要： Methods may include reacting an antistatic agent with at least one alkylaluminum to form an antistatic complex, and may further include feeding the antistatic complex into a polymerization process. Methods of using an antistatic agent in a polymerization process may include feeding the antistatic agent into the polymerization process and, subsequently, reacting the antistatic agent with at least one alkylaluminum.
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8.发明申请公开(公告)号：US20180002529A1
公开(公告)日：2018-01-04
申请号：US15540513
申请日：2014-12-29
申请人： Braskem S.A.
发明人： Dihogenes Adriano Pozzer , Olavo Martins Junior , Alessandra Coelho Silva Lucas , Fernando Silveira
CPC分类号： C09C1/42 , B82Y30/00 , B82Y40/00 , C08K3/013 , C08K9/04 , C09C1/44 , Y02P20/544 , Y10S977/734 , Y10S977/742 , Y10S977/755 , Y10S977/773 , Y10S977/811 , Y10S977/845 , Y10S977/90 , C08L23/12 , C08F110/06 , C08F2/44
摘要： A process for treatment of nanoparticles of mineral filler for obtaining 5 processed nanoparticles for use in polymerization in the presence of nanopartciles which includes the steps of (a) drying a mineral filler with an inert gas for remove catalyst poisons; (b) mixing the mineral filler dried obtained in step (a) with a swelling agent in a liquid state or near a critical state or in the supercritical state; (c) subjecting the swelling agent of the 10 mixture obtained in step (b) to an endoenthalpic or isoentalphic phase change by altering the conditions of the temperature and/or pressure; (d) subjecting the nanoparticles of the mixture obtained in step (c) to contact of scavenging agent to react with catalyst poisons; then the mixture obtained in step (d) can be dried in a step (e) with an inert gas to remove sub-products 15 from scavenging agent and catalyst poisons to obtain the treated nanoparticles.
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