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    • 3. 发明授权
    • Process for separating mixtures of substances of low volatility
    • 分离低挥发性物质混合物的方法
    • US4345976A
    • 1982-08-24
    • US10143
    • 1979-02-07
    • Siegfried PeterGerd BrunnerRolf Riha
    • Siegfried PeterGerd BrunnerRolf Riha
    • B01D3/40B01D11/04C07C51/46B01D3/36C11C1/10
    • C07C51/46B01D11/0407B01D3/40Y02P20/544
    • The invention involves a process for substantially separating the components of mixtures of substances at least one of which is of low volatility while the other is of low or no volatility, the process using a compressed gas under supercritical conditions and an entrainer which increases the concentration of said mixture in the gaseous phase as well as the separation factor between the components to be separated. The process operates in two distillation zones the first of which substantially separates the components of low volatility in a process similar to a rectification process while the second distillation zone separates the top product of the first distillation zone from the gas with the aid of the entrainer which is condensed partially and in this state is passed in countercurrent to the gas carrying the separated component of low volatility.
    • 本发明涉及一种用于基本上分离其中至少一种具有低挥发性,另一种具有低挥发性或不挥发性的物质混合物的组分的方法,该方法在超临界条件下使用压缩气体,并且夹带剂增加了 所述气相中的混合物以及要分离的组分之间的分离因子。 该方法在两个蒸馏区中操作,其中第一个蒸馏区在类似于精馏过程的过程中基本上分离低挥发性组分,而第二蒸馏区借助于夹带剂将第一蒸馏区的顶部产物与气体分离, 被部分冷凝,并且在该状态下与携带低挥发性的分离组分的气体逆流通过。
    • 6. 发明授权
    • A method for the production of a carbon fiber precursor
    • 一种生产碳纤维前体的方法
    • US4756818A
    • 1988-07-12
    • US18200
    • 1987-02-24
    • Siegfried PeterHerbert BenekeFranz OesteWolfgang FexerWolfgang JaumannManfred MeinbreckseJoachim Kempfert
    • Siegfried PeterHerbert BenekeFranz OesteWolfgang FexerWolfgang JaumannManfred MeinbreckseJoachim Kempfert
    • C10C3/02C08L95/00C10C1/04C10C3/04C10C3/08D01F9/15C10C1/18
    • C10C1/04C10C3/08D01F9/15
    • A method for the production of a carbon fiber precursor from coal tar pitch comprising extracting coal tar pitch at elevated temperatures and pressures with a mixture of a supercritical gas and an entraining agent to obtain a solution free of quinoline-insoluble components, recovering from the solution by lowering the pressure and/or raising the temperature to obtain at least one fraction selected from the group consisting of quinoline-soluble fraction and toluene-soluble fraction, treating the said fraction(s) at 380.degree. to 450.degree. C. under a non-oxidizing atmosphere at atmosphere pressure until 40 to 65% by volume of the product is converted into pitch containing mesophase, extracting the latter pitch with a mixture of supercritical gas and an entraining agent to remove isotropic pitch and recovering isotropic pitch with a mesophase content of at least 75% by volume, a pyridine-insoluble matter content of 20 to 50% by weight, a mean molecular weight of 900 to 1200 and a melting point of 330.degree. to 360.degree. C. and the isotropic pitch product produced therefrom and carbon fibers made from the isotropic pitch.
    • 一种从煤沥青沥青生产碳纤维前体的方法,包括在高温和高压下用超临界气体和夹带剂的混合物萃取煤焦油沥青以获得不含喹啉不溶性组分的溶液,从溶液中回收 通过降低压力和/或升高温度以获得至少一种选自喹啉可溶级分和甲苯可溶级分的级分,在380-450℃下处理所述级分, 在空气压力下的氧化气氛直到产物的40至65体积%转化为含有中间相的沥青,用超临界气体和夹带剂的混合物萃取后者沥青以除去各向同性沥青并回收各向同性沥青,中间相含量为 至少75体积%,吡啶不溶物质含量为20〜50重量%,平均分子量为900〜1200,熔点 为330〜360℃,由各向同性沥青产物及各向同性沥青制成碳纤维。
    • 8. 发明授权
    • Method for producing fatty acid esters
    • 脂肪酸酯的制造方法
    • US06211390B1
    • 2001-04-03
    • US09269090
    • 1999-12-03
    • Siegfried PeterRuth GanswindtEckhard Weidner
    • Siegfried PeterRuth GanswindtEckhard Weidner
    • C07C5100
    • C11C3/003C07C67/58C07C69/52
    • The invention concerns a method for producing fatty acid esters from fatty acid triglyceride and in particular from animal or vegetable fats and oils by transesterification with a monovalent low-molecular weight alcohol in the presence of a homogeneous or heterogeneous catalyst. In accordance with the invention, the formed fatty acid ester is extracted from the reaction mixture by means of a near-critical extractant. In this way fatty acid esters are obtained at high yield and excellent purity. As the extractant preferably a low pressure gas having a reduced temperature at 20° C. of about 0.7, preferably of equal to or greater than 0.7, is employed. Preferred extractants are carbon dioxide, propane, butane, dimethyl ether, ethyl acetate or mixtures thereof.
    • 本发明涉及一种通过在均相或多相催化剂存在下通过与一价低分子量醇的酯交换从脂肪酸甘油三酯,特别是动物或植物脂肪和油制备脂肪酸酯的方法。 根据本发明,通过近临界萃取剂从反应混合物中提取形成的脂肪酸酯。 以这种方式获得高产率和优异纯度的脂肪酸酯。 作为萃取剂,优选使用在20℃下的温度降低约0.7,优选等于或大于0.7的低压气体。 优选的萃取剂是二氧化碳,丙烷,丁烷,二甲醚,乙酸乙酯或其混合物。
    • 9. 发明授权
    • Process for de-oiling crude lecithin
    • 粗卵磷脂脱油工艺
    • US5597602A
    • 1997-01-28
    • US362448
    • 1995-04-21
    • Siegfried PeterBernd CzechEckard WeidnerZhenfeng Zhang
    • Siegfried PeterBernd CzechEckard WeidnerZhenfeng Zhang
    • A23J7/00C07F9/10C11B1/10C11B3/00C11B7/00A23D7/005
    • C11B1/104A23J7/00
    • A process for recovering lecithin from oil- and lecithin-containing mixtures, comprising extracting a lecithin/oil mixture with an extractant selected from the group consisting of a hydrocarbon having 3 carbon atoms, an unbranched hydrocarbon having 4 carbon atoms, a branched hydrocarbon having 4 carbon atoms, and mixtures thereof, at a pressure of from 1 to 8 MPa and a temperature of from 20 to 100.degree. C., which conditions ensure liquid phase extraction with the development of two liquid phases, one of which is an oil enriched liquid hydrocarbon phase and the other of which is a lecithin enriched hydrocarbon phase; separating the two liquid hydrocarbon phases; and recovering substantially lecithin-free oil from the oil-enriched phase and substantially oil-free, pure lecithin from the lecithin-enriched phase.
    • PCT No.PCT / EP93 / 01750 Sec。 371日期1995年04月21日 102(e)日期1995年4月21日PCT提交1993年7月6日PCT公布。 出版物WO94 / 01004 日期1994年1月20日一种从含有油和含卵磷脂的混合物中回收卵磷脂的方法,包括用选自具有3个碳原子的烃,具有4个碳原子的未分支烃的提取剂萃取卵磷脂/油混合物, 具有4个碳原子的支链烃及其混合物,压力为1至8MPa,温度为20至100℃,这些条件确保液相萃取与两个液相的发展,其中之一 是富油液相烃相,另一个是富含卵磷脂的烃相; 分离两个液相烃相; 并从富含油脂的相中回收基本上不含卵磷脂的油,并从富含卵磷脂的相中回收基本上无油的纯卵磷脂。