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    Selective Extraction of Aromatics from Mixtures of Aromatic and Non-Aromatic Hydrocarbons
    16.
    发明专利
    Selective Extraction of Aromatics from Mixtures of Aromatic and Non-Aromatic Hydrocarbons 未知

    公开(公告)号：GB1169113A

    公开(公告)日：1969-10-29

    申请号：GB747867

    申请日：1967-02-16

    Applicant: BASF AG

    Inventor： HAARER ERICH ,  FUERST ERNST ,  WEITZ HANS-MARTIN

    IPC: C10G21/20

    Abstract: 1,169,113. Solvent extraction of hydrocarbons. BADISCHE ANILIN- & SODA-FABRIK A.G. 16 Feb., 1967 [17 Feb., 1966], No. 7478/67. Heading C5E. [Also in Division C2] In a process for the recovery of aromatic hydrocarbons by selective extraction from hydrocarbon mixtures which in addition to aromatic and paraffinic hydrocarbons may contain olefins and naphthenes, a N-(#- methoxy)-alkylpyrrolidone with or without the addition of water is used as selective solvent. The methoxy-methyl, -ethyl and -propyl compounds are referred to and the preparation of N-methoxymethyl-pyrrolidone is described (see Division C2).

    Separating carbon dioxide and/or hydrogen sulphide from gases
    17.
    发明专利
    Separating carbon dioxide and/or hydrogen sulphide from gases 未知

    公开(公告)号：GB1132922A

    公开(公告)日：1968-11-06

    申请号：GB1148266

    申请日：1966-03-16

    Applicant: BASF AG

    Inventor： HAARER ERICH ,  FUERST ERNST ,  SCHMID DIETER ,  BUDDENBERG OTTO

    IPC: B01D53/52 ,  C07D263/22 ,  C10K1/16 ,  G01R27/28

    Abstract: 1,132,922. Separating impurities from gas streams. BADISCHE ANILIN- & SODAFABRIK A.G. 16 March, 1966 [17 March, 1965], No. 11482/66. Heading BIL. [Also in Division C5] H 2 S and CO 2 are removed from gaseous mixtures containing them by scrubbing the gas mixture with an alkyloxazolidone, preferably with 3,5-dimethyloxazolidone-2, 3-methyloxazolidone-2, or 3-isopropyloxazolidone-2. The absorption is suitably performed under such conditions as 5-100, preferably 15-50, atmospheres, at temperatures of 10-40‹C., desorption of the solution being achieved by contact with air. Gas mixtures which may be so treated include natural gas, synthesis gas, industrial gases, coke oven gas and water gas.

    Separating carbon dioxide and/or hydrogen sulphide from gases
    18.
    发明专利
    Separating carbon dioxide and/or hydrogen sulphide from gases 未知

    公开(公告)号：GB1132882A

    公开(公告)日：1968-11-06

    申请号：GB1148366

    申请日：1966-03-16

    Applicant: BASF AG

    Inventor： HAARER ERICH ,  FUERST ERNST ,  BUDDENBERG OTTO ,  SCHMID DIETER

    IPC: B01D53/52 ,  C01B32/50 ,  C10K1/16

    Abstract: 1,132,882. Separating impurities from gasstreams. BADISCHE ANILIN- & SODAFABRIK A.G. 16 March, 1966 [17 March, 1965], No. 11483/66. Heading B1L. [Also in Division C5] H 2 S and CO 2 are removed from gas mixtures by scrubbing the gas mixtures with a liquid dialkyl ester of a C 4-6 dicarboxylic acid. Absorption is suitably effected at pressures of 3-100 atmospheres and temperatures of 10- 40‹C, and desorption is achieved by partial or complete release of pressure in the presence of a current of air. The preferred ester is dimethyl glutarate. To increase the water solubility of the solvent, a substance such as an N-alkylformamide, an N-alkyl-2-pyrrolidone, or a tetra alkylurea may be added. Mixtures which may be so treated include natural gas, synthesis gas, town gas, industrial gas, coke oven gas, and water gas.

    Recovering aromatic hydrocarbons by selective extraction of hydrocarbon mixtures
    19.
    发明专利
    Recovering aromatic hydrocarbons by selective extraction of hydrocarbon mixtures 未知

    公开(公告)号：GB1127971A

    公开(公告)日：1968-09-25

    申请号：GB386066

    申请日：1966-01-28

    Applicant: BASF AG

    Inventor： FUERST ERNST ,  WEITZ HANS-MARTIN ,  HAARER ERICH

    IPC: C07C7/10 ,  C10G21/20

    Abstract: 1,127,971. Recovering aromatic hydrocarbons. BADISCHE ANILIN- & SODA-FABRIK A.G. 28 Jan., 1966 [30 Jan., 1965], No. 3860/66. Heading C5E. Aromatic hydrocarbons are recovered from hydrocarbon mixtures containing aromatic and paraffinic hydrocarbons with or without olefins and naphthenes by a selective extraction process (e.g. liquid-liquid extraction or extractive distillation) in which the solvent is an aliphatic dicarboxylic imide, which may be substituted on the N-atom by an alkoxy or esterified hydroxy group. The solvent may contain up to 30% water and/or other additives, e.g. N- substituted pyrrolidones, piperazines, polyhydric alcohols, urea, and urea derivatives. In a liquid-liquid extraction process a backflow of a hydrocarbon solvent may be used, e:g. propane, butane, pentane, hexane, or iso-octane. A variety of mineral oil fractions which may be treated is mentioned, and the process is exemplified by a liquid-liquid extraction process in which a mixture of benzene, cyclohexane, cyclohexene, and n-hexane is introduced into the middle of a sieve plate column, N-hydroxyethyl succinimide acetic ester as the top, and iso-octane at the bottom. Raffinate from the top of the column, after removal of iso-octane, contains less than 1 % benzene; and extract from the bottom of the column, after removal of the imide solvent, contains 99À6% benzene.

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