PROPENE PRODUCTION METHOD
    92.
    发明申请
    PROPENE PRODUCTION METHOD 审中-公开
    丙烯生产方法

    公开(公告)号:US20160368833A1

    公开(公告)日:2016-12-22

    申请号:US15034367

    申请日:2013-11-08

    申请人: BRASKEM S.A.

    摘要: The present invention relates to a process for the production of propene from a mixture of alcohols obtained from at least one renewable source of carbon, comprising the following steps: (a) fermentation of at least one renewable source of carbon for the production of a mixture of alcohols comprising ethanol, isopropanol and 1-butanol; (b) simplified removal of the alcohols from the fermentative wort to generate an aqueous solution containing chiefly ethanol, isopropanol and 1-butanol; (c) joint dehydration of the alcohols to produce a mixture of olefins comprising chiefly ethene, propene and linear butenes, the linear butenes being a mixture of 1-butene and 2-butenes (cis and trans isomers), besides water and by-products, among which oxygenated compounds; (d) removal of water, oxygenated compounds and other by-products to generate a mixture of olefins comprising chiefly ethene, propene and linear butenes; and (f) passing the mixture of olefins through an isomerized bed, so that 1-butene will be isomerized to 2-butenes and, subsequently, passing the mixture of olefins comprising chiefly ethene, propene and 2-butenes through a metathesis bed, for reaction between ethene and 2-butenes, generating additional propene, the molar ratio ethene:linear butenes being corrected to be between 1:1 and 1.3:1, by means of one of the alternatives selected from the group comprising: (i) addition of a stream containing ethanol to the process in step (c); (ii) addition of a stream containing ethene to the process in step (e); (iii) addition of a stream containing ethanol to the process in step (c) and a stream containing ethene in step (e).

    摘要翻译: 本发明涉及由从至少一种可再生碳源获得的醇的混合物生产丙烯的方法,其包括以下步骤:(a)至少一种可再生的碳源的发酵以产生混合物 包含乙醇,异丙醇和1-丁醇的醇; (b)从发酵麦汁中简化醇的去除以产生主要包含乙醇,异丙醇和1-丁醇的水溶液; (c)醇的联合脱水以产生主要包括乙烯,丙烯和线性丁烯的烯烃混合物,线性丁烯是1-丁烯和2-丁烯(顺式和反式异构体)的混合物,除了水和副产物 ,其中含氧化合物; (d)除去水,含氧化合物和其它副产物以产生主要包括乙烯,丙烯和线性丁烯的烯烃混合物; 和(f)将烯烃混合物通过异构化床,使得1-丁烯将异构化成2-丁烯,随后将主要包括乙烯,丙烯和2-丁烯的烯烃混合物通过复分解床,用于 乙烯和2-丁烯之间的反应,产生另外的丙烯,乙烯的摩尔比:线性丁烯被校正为1:1至1.3:1,通过选自以下的选择之一:(i)加入 将步骤(c)中的方法中含有乙醇的料流; (ii)向步骤(e)中的方法中加入含有乙烯的料流; (iii)向步骤(c)中的方法中加入含有乙醇的料流和在步骤(e)中含有乙烯的料流)。

    FLUIDIC SEAL APPARATUS FOR CONTINUOUS POLYMERIZATION PROCESS

    公开(公告)号:US20240209123A1

    公开(公告)日:2024-06-27

    申请号:US18296776

    申请日:2023-04-06

    申请人: Braskem S.A.

    IPC分类号: C08F2/01 C08F2/34

    CPC分类号: C08F2/01 C08F2/34

    摘要: Described is a fluidic seal apparatus for continuously injecting a sealing gas into a bottom section of a gas-solids separation chamber. The fluidic seal apparatus includes an external section, a feed tube in fluid communication with a sealing gas supply, and an internal section. The external section connects the sealing gas supply to the internal section. The internal section includes gas distribution nozzles for distributing the sealing gas inside the bottom section of the gas-solids separation chamber. An internal chamber between the internal section and the external section is pressurized by the sealing gas.