Extractive distillation of C.sub.4 hydrocarbons with an extractant
mixture
    1.
    发明授权
    Extractive distillation of C.sub.4 hydrocarbons with an extractant mixture 失效
    用萃取剂混合物萃取C {HD 4 {B烃

    公开(公告)号:US4076595A

    公开(公告)日:1978-02-28

    申请号:US731955

    申请日:1976-10-13

    CPC classification number: C07C7/08

    Abstract: A mixture of methylethylsulfone and at least one compound from the group including methylethylketone, acetone, and tetrahydrofuran is employed as a selective solvent in extractive distillation process for separation of diolefins from olefins.

    Abstract translation: 在从烯烃中分离二烯烃的萃取蒸馏过程中,使用甲基乙基砜和至少一种包括甲基乙基酮,丙酮和四氢呋喃的化合物的混合物作为选择性溶剂。

    Separation of styrene from xylenes
    3.
    发明授权
    Separation of styrene from xylenes 失效
    苯乙烯与二甲苯的分离

    公开(公告)号:US4031153A

    公开(公告)日:1977-06-21

    申请号:US616717

    申请日:1975-09-25

    CPC classification number: C07C7/005 C07C7/10

    Abstract: A stream containing styrene and mixed xylenes, such as may be recovered from pyrolysis gasoline, is fractionated to obtain a stream containing ortho-xylene and styrene. Styrene is separated from the latter stream by an extraction process which employs succinonitrile as the solvent. Styrene is selectively absorbed by the succinonitrile, and is subsequently recovered from the resulting extract phase.

    Abstract translation: 将含有苯乙烯和混合二甲苯(例如可以从裂解汽油回收的物料)的物流分馏,得到含有邻二甲苯和苯乙烯的料流。 通过采用琥珀腈作为溶剂的萃取方法将苯乙烯与后者物流分离。 苯乙烯被琥珀腈选择性吸收,随后从所得萃取相中回收。

    Extractive distillation of hydrocarbon mixtures
    4.
    发明授权
    Extractive distillation of hydrocarbon mixtures 失效
    烃混合物的萃取蒸馏

    公开(公告)号:US4024028A

    公开(公告)日:1977-05-17

    申请号:US721260

    申请日:1976-09-08

    CPC classification number: C07C7/00

    Abstract: Hydrocarbons having different degrees of saturation are separated by extractive distillation using selective solvent comprising a mixture of dimethylsulfone, methylethylketone and sulfolane.

    Abstract translation: 通过使用包含二甲基砜,甲基乙基酮和环丁砜的混合物的选择性溶剂的萃取蒸馏分离具有不同饱和度的烃。

    Catalytic alkylation of hydrocarbons
    6.
    发明授权
    Catalytic alkylation of hydrocarbons 失效
    碳氢化合物的催化烷基化

    公开(公告)号:US4317795A

    公开(公告)日:1982-03-02

    申请号:US124994

    申请日:1980-02-26

    Abstract: A continuous process for the alkylation of an alkylatable hydrocarbon with an alkylating agent in the presence of an acid-type catalyst, including; contacting an alkylatable hydrocarbon with an alkylating agent in the presence of an acid-type catalyst at a temperature and pressure and for a time sufficient to alkylate the alkylatable hydrocarbon; separating the reaction effluent stream into an alkylate product phase and a catalyst phase containing catalyst-soluble oil; cooling the catalyst phase to a temperature essentially equal to the alkylation reaction temperature; recycling the cooled catalyst phase to the alkylation reaction; contacting a diolefinic hydrocarbon with an acid-type catalyst at a temperature and pressure sufficient to form additional catalyst-soluble oil and combining the additional catalyst-soluble oil with the circulating catalyst phase. In accordance with another aspect of the invention, a quantity selected from the amount of catalyst-soluble oil, water and/or the total of the amount of catalyst-soluble oil and water in the catalyst phase is controlled, within specific limits. A start-up procedure and apparatus for carrying out the process are also included.

    Abstract translation: 一种在酸型催化剂存在下用烷基化剂烷基化可烷基化烃的连续方法,包括: 在酸式催化剂的存在下,在可压制烷基化烃的温度和压力下使可烷基化烃与烷基化剂接触,并持续足够的时间烷基化; 将反应流出物流分离成烷基化物产物相和含有催化剂可溶性油的催化剂相; 将催化剂相冷却至基本等于烷基化反应温度的温度; 将冷却的催化剂相再循环至烷基化反应; 在足以形成额外的催化剂可溶性油并将另外的催化剂可溶性油与循环催化剂相组合的温度和压力下使二烯烃与酸型催化剂接触。 根据本发明的另一方面,在特定限度内控制选自催化剂可溶性油,水的量和/或催化剂相中催化剂可溶性油和水的总量的量。 还包括用于执行该过程的启动程序和装置。

    Dehydrocyclization process
    7.
    发明授权
    Dehydrocyclization process 失效
    脱氢环化过程

    公开(公告)号:US4229602A

    公开(公告)日:1980-10-21

    申请号:US966457

    申请日:1978-12-04

    CPC classification number: C07C5/41

    Abstract: A process for catalytic reforming of hydrocarbons which comprises contacting aliphatic hydrocarbons with steam and a dehydrocyclization catalyst under dehydrocyclization conditions to form a vapor stream containing aromatics and nonaromatics, separating at least a portion of the vapor stream which is compressed, heated, and recycled to the dehydrocyclization reaction to minimize steam diluent requirements for the process.

    Abstract translation: 一种用于烃的催化重整的方法,其包括在脱氢环化条件下使脂族烃与蒸汽和脱氢环化催化剂接触以形成含有芳烃和非芳族化合物的蒸气流,将至少一部分被压缩,加热并再循环的蒸气流分离成 脱氢环化反应最小化蒸汽稀释剂对该过程的要求。

    Acid type hydrocarbon alkylation with acid-soluble oil addition
    8.
    发明授权
    Acid type hydrocarbon alkylation with acid-soluble oil addition 失效
    酸型烃烷基化与酸溶性油添加

    公开(公告)号:US4207423A

    公开(公告)日:1980-06-10

    申请号:US27425

    申请日:1979-04-05

    Abstract: A continuous process for the alkylation of an alkylatable hydrocarbon with an alkylating agent in the presence of an acid-type catalyst, including; contacting an alkylatable hydrocarbon with an alkylating agent in the presence of an acid-type catalyst at a temperature and pressure and for a time sufficient to alkylate the alkylatable hydrocarbon; separating the reaction effluent stream into an alkylate product phase and a catalyst phase containing catalyst-soluble oil; cooling the catalyst phase to a temperature essentially equal to the alkylation reaction temperature; recycling the cooled catalyst phase to the alkylation reaction; contacting a diolefinic hydrocabon with an acid-type catalyst at a temperature and pressure sufficient to form additional catalyst-soluble oil and combining the additional catalyst-soluble oil with the circulating catalyst phase. In accordance with another aspect of the invention, a quantity selected from the amount of catalyst-soluble oil, water and/or the total of the amount of catalyst-soluble oil and water in the catalyst phase is controlled, within specific limits. A start-up procedure and apparatus for carrying out the process are also included.

    Abstract translation: 一种在酸型催化剂存在下用烷基化剂烷基化可烷基化烃的连续方法,包括: 在酸式催化剂的存在下,在可压制烷基化烃的温度和压力下使可烷基化烃与烷基化剂接触,并持续足够的时间烷基化; 将反应流出物流分离成烷基化物产物相和含有催化剂可溶性油的催化剂相; 将催化剂相冷却至基本等于烷基化反应温度的温度; 将冷却的催化剂相再循环至烷基化反应; 在足以形成额外的催化剂可溶性油并将另外的催化剂可溶性油与循环催化剂相组合的温度和压力下使二烯烃与酸式催化剂接触。 根据本发明的另一方面,在特定限度内控制选自催化剂可溶性油,水的量和/或催化剂相中催化剂可溶性油和水的总量的量。 还包括用于执行该过程的启动程序和装置。

    Butadiene recovery
    9.
    发明授权
    Butadiene recovery 失效
    丁二烯回收

    公开(公告)号:US4166771A

    公开(公告)日:1979-09-04

    申请号:US780335

    申请日:1977-03-23

    CPC classification number: C07C7/08

    Abstract: A mixture of C.sub.4 -hydrocarbons is extractively distilled with sulfolane and acetone or methylethyl ketone as the selective solvent; the rich solvent containing 1,3-butadiene and vinylacetylene is stripped and a small quantity of the ketone is allowed to leave overhead. Thereby the further fractionation of the stripper overhead results in a very efficient separation of 1,3-butadiene and vinylacetylene.

    Abstract translation: 用环丁砜和丙酮或甲基乙基酮作为选择性溶剂萃取蒸馏出C4-烃的混合物; 剥离含有1,3-丁二烯和乙烯基乙炔的富溶剂,并允许少量的酮离开塔顶馏出物。 因此,汽提器塔顶馏分的进一步分馏导致1,3-丁二烯和乙烯基乙炔的非常有效的分离。

    Butadiene purification with simultaneous prefractionation and
vinylacetylene rejection
    10.
    发明授权
    Butadiene purification with simultaneous prefractionation and vinylacetylene rejection 失效
    丁二烯净化与同时初步分离和乙炔乙炔排斥

    公开(公告)号:US4090923A

    公开(公告)日:1978-05-23

    申请号:US785157

    申请日:1977-04-06

    CPC classification number: C07C7/005 C07C7/08

    Abstract: A C.sub.4 -hydrocarbon feedstream containing butenes, butadiene, and vinylacetylene is subjected to a first extractive distillation with a selective solvent to remove butenes and a first portion of vinylacetylene as the extract; by the extraction with a minor quantity of methylethyl ketone in the selective solvent in this step, it has been found that a major portion of the vinylacetylene can be rejected, together with the butenes in the rich extract and that simultaneously the quantity of butadiene extracted could be considerably reduced; in a second extractive distillation the butadiene-rich raffinate of the first extractive distillation is further purified by extractive distillation using a mixture of sulfolane and methylethyl ketone as the solvent; after solvent stripping, the butadiene stream is finally purified in a fractionation step, wherein further vinylacetylene is removed.

    Abstract translation: 将含有丁烯,丁二烯和乙烯基乙炔的C 4烃进料流用选择性溶剂进行第一次萃取蒸馏以除去丁烯,将第一部分乙烯基乙炔作为提取物; 通过在该步骤中通过在选择性溶剂中用少量的甲基乙基酮萃取,已经发现乙烯基乙炔的主要部分与富提取物中的丁烯一起被排除,并且同时提取的丁二烯的量可以 大大减少 在第二萃取蒸馏中,第一萃取蒸馏的富含丁二烯的萃余液通过萃取蒸馏进一步纯化,使用环丁砜和甲基乙基酮作为溶剂的混合物; 溶剂汽提后,在分馏步骤中最后纯化丁二烯流,其中除去进一步的乙烯基乙炔。

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