Low-energy extractive distillation process for dehydration of aqueous ethanol
    21.
    发明申请
    Low-energy extractive distillation process for dehydration of aqueous ethanol 有权
    用于乙醇水溶液脱水的低能萃取蒸馏方法

    公开(公告)号:US20090014313A1

    公开(公告)日:2009-01-15

    申请号:US11827896

    申请日:2007-07-13

    Abstract: An energy-efficient extractive distillation process for producing anhydrous ethanol from aqueous/ethanol feeds containing any range of ethanol employs an extractive distillation column (EDC) that operates under no or greatly reduced liquid reflux conditions. The EDC can be incorporated into an integrated process for producing anhydrous ethanol used for gasoline blending from fermentation broth. By using a high-boiling extractive distillation solvent, no solvent is entrained by the vapor phase to the EDC overhead stream, even under no liquid reflux conditions. The energy requirement and severity of the EDC can be further improved by limiting ethanol recovery in the EDC. In this partial ethanol recovery design, ethanol which remains in the aqueous stream from the EDC is recovered in a post-distillation column or the aqueous stream is recycled to a front-end pre-distillation column where the ethanol is readily recovered since the VLE curve for ethanol/water is extremely favorable for distillation.

    Abstract translation: 从含有任何范围的乙醇的含水/乙醇进料中生产无水乙醇的节能萃取蒸馏方法采用在没有或大大降低的液体回流条件下运行的萃取蒸馏塔(EDC)。 EDC可以并入用于从发酵液中生产用于汽油混合的无水乙醇的整合方法。 通过使用高沸点萃取蒸馏溶剂,即使在没有液体回流条件下,没有溶剂被气相夹带到EDC塔顶馏出物中。 通过限制EDC中的乙醇回收,可以进一步提高EDC的能量需求和严重程度。 在该部分乙醇回收设计中,保留在来自EDC的水流中的乙醇在后蒸馏塔中回收,或将水流循环至前端预蒸馏塔,其中乙醇容易回收,因为VLE曲线 对于乙醇/水非常有利于蒸馏。

    Oxidative desulfurization and denitrogenation of petroleum oils
    22.
    发明申请
    Oxidative desulfurization and denitrogenation of petroleum oils 失效
    石油的氧化脱硫脱氮

    公开(公告)号:US20070102323A1

    公开(公告)日:2007-05-10

    申请号:US11643078

    申请日:2006-12-21

    CPC classification number: C10G27/12

    Abstract: An improved oxidative process that employ a robust, non-aqueous, and oil-soluble organic peroxide oxidant for effective desulfurization and denitrogenation of hydrocarbons including petroleum fuels, hydrotreated vacuum gas oil (VGO), non-hydrotreated VGO, petroleum crude oil, synthetic crude oil from oil sand, and residual oil. Even at low concentrations and without the assistance of catalysts, the non-aqueous organic peroxide oxidant is extremely active and fast in oxidizing the sulfur and nitrogen compounds in the hydrocarbon feedstocks. Furthermore, the process generates a valuable organic acid by-product that is also used internally as the extractive solvent for effective removal of the oxidized sulfur and nitrogen from the hydrocarbons without the need of a final adsorption step. Novel process steps are also disclosed to substantially prevent yield loss in the oxidative process.

    Abstract translation: 一种改进的氧化方法,其采用坚固的非水和油溶性有机过氧化物氧化剂,用于有效脱硫和脱氮烃类,包括石油燃料,加氢处理的减压瓦斯油(VGO),非加氢处理的VGO,石油原油,合成原油 油砂油和残油。 即使在低浓度且没有催化剂的帮助下,非水有机过氧化物氧化剂在氧化烃原料中的硫和氮化合物方面是非常活跃和快速的。 此外,该方法产生有价值的有机酸副产物,其也在内部用作萃取溶剂,以有效地从烃中除去氧化的硫和氮,而不需要最终的吸附步骤。 还公开了新的方法步骤以基本上防止氧化过程中的产量损失。

    Apparatus for preparing purified terephthalic acid
    23.
    发明授权
    Apparatus for preparing purified terephthalic acid 有权
    用于制备纯对苯二甲酸的装置

    公开(公告)号:US6113866A

    公开(公告)日:2000-09-05

    申请号:US436786

    申请日:1999-11-08

    CPC classification number: C07C51/43

    Abstract: A method and apparatus for purifying crude terephthalic acid from a liquid dispersion thereof also containing impurities selected from unreacted starting materials, solvents, products of side reactions and/or other undesired materials is provided. The method comprises the steps of filtering the dispersion to form a crude terephthalic acid filter cake, dissolving the filter cake in a selective crystallization solvent at an elevated temperature to form a solution, crystallizing purified terephthalic acid from the solution in the crystallization solvent by reducing the pressure and temperature of the solution, and separating the crystallized purified terephthalic acid from the solution. According to the invention, the selective crystallization solvent is non-aqueous, non-corrosive and essentially non-reactive with terephthalic acid. Preferably, the selective crystallization solvent is N-methyl pyrrolidone. The method and apparatus produces purified terephthalic acid having a purity desired for use in forming polyester resin and other products at an economically attractive rate and at operating conditions of reduced severity which require a lower capital investment and simplified processing.

    Abstract translation: 提供了一种从其液体分散体中纯化粗对苯二甲酸的方法和装置,其还含有选自未反应的起始原料,溶剂,副反应产物和/或其它不需要的物质的杂质。 该方法包括以下步骤:过滤分散体以形成粗对苯二甲酸滤饼,在高温下将滤饼溶解在选择性结晶溶剂中以形成溶液,从结晶溶剂中的溶液中将纯化的对苯二甲酸结晶, 溶液的压力和温度,并从溶液中分离结晶的纯化对苯二甲酸。 根据本发明,选择性结晶溶剂是非水性的,非腐蚀性的并且与对苯二甲酸基本上不反应。 优选地,选择性结晶溶剂是N-甲基吡咯烷酮。 该方法和设备产生纯化的对苯二甲酸,其具有希望用于形成聚酯树脂和其它产品的纯度的经纯化的对苯二甲酸酯以经济上有吸引力的速率和苛刻的操作条件,其需要较低的资本投资和简化的加工。

    Method and apparatus for preparing purified terephthalic acid
    24.
    发明授权
    Method and apparatus for preparing purified terephthalic acid 失效
    制备纯对苯二甲酸的方法和装置

    公开(公告)号:US5961935A

    公开(公告)日:1999-10-05

    申请号:US74251

    申请日:1998-05-07

    CPC classification number: C07C51/43

    Abstract: A method and apparatus for purifying crude terephthalic acid from a liquid dispersion thereof also containing impurities selected from unreacted starting materials, solvents, products of side reactions and/or other undesired materials is provided. The method comprises the steps of filtering the dispersion to form a crude terephthalic acid filter cake, dissolving the filter cake in a selective crystallization solvent at an elevated temperature to form a solution, crystallizing purified terephthalic acid from the solution in the crystallization solvent by reducing the temperature of the solution, and separating the crystallized purified terephthalic acid from the solution. According to the invention, the selective crystallization solvent is non-aqueous, non-corrosive and essentially non-reactive with terephthalic acid. Preferably, the selective crystallization solvent is N-methyl pyrrolidone. The method and apparatus produces purified terephthalic acid having a purity desired for use in forming polyester resin and other products at an economically attractive rate and at operating conditions of reduced severity which require a lower capital investment and simplified processing.

    Abstract translation: 提供了一种从其液体分散体中纯化粗对苯二甲酸的方法和装置,其还含有选自未反应的起始原料,溶剂,副反应产物和/或其它不需要的物质的杂质。 该方法包括以下步骤:过滤分散体以形成粗对苯二甲酸滤饼,在高温下将滤饼溶解在选择性结晶溶剂中以形成溶液,通过将结晶溶剂中的溶液从纯化的对苯二甲酸中结晶, 溶液的温度,和从溶液中分离出结晶的纯对苯二甲酸。 根据本发明,选择性结晶溶剂是非水性的,非腐蚀性的并且与对苯二甲酸基本上不反应。 优选地,选择性结晶溶剂是N-甲基吡咯烷酮。 该方法和设备产生纯化的对苯二甲酸,其具有希望用于形成聚酯树脂和其它产品的纯度的经纯化的对苯二甲酸酯以经济上有吸引力的速率和苛刻的操作条件,其需要较低的资本投资和简化的加工。

    Extractive distillation of alcohol/ether/hydrocarbon mixtures
    27.
    发明授权
    Extractive distillation of alcohol/ether/hydrocarbon mixtures 失效
    醇/醚/烃混合物的萃取蒸馏

    公开(公告)号:US5160414A

    公开(公告)日:1992-11-03

    申请号:US732981

    申请日:1991-07-19

    CPC classification number: B01D3/40 C07C41/42

    Abstract: An extractive distillation process for separation ethers (in particular methyl t-butyl ether or ethyl t-butyl ether), aliphatic hydrocarbons (in particular isobutane and/or isobutene) and alcohols (in particular methanol or ethanol) employs as solvent sulfolane(s) and/or dialkyl sulfone(s), or N-(.beta.-mercaptoalkyl)-2-pyrrolidone(s), or a mixture of N-alkyl-2-pyrrolidone(s) and either sulfolane(s) or glycol compound(s).

    Abstract translation: 用于分离醚(特别是甲基叔丁基醚或乙基叔丁基醚),脂族烃(特别是异丁烷和/或异丁烯)和醇(特别是甲醇或乙醇)的萃取蒸馏方法用作溶剂环丁砜, 和/或二烷基砜或N-(β-巯基烷基)-2-吡咯烷酮,或N-烷基-2-吡咯烷酮和环丁砜或二醇化合物(s)的混合物 )。

    Separation of olefinic hydrocarbons by extractive distillation
    28.
    发明授权
    Separation of olefinic hydrocarbons by extractive distillation 失效
    通过萃取蒸馏分离烯烃

    公开(公告)号:US5151161A

    公开(公告)日:1992-09-29

    申请号:US731686

    申请日:1991-07-17

    CPC classification number: B01D3/40 C07C7/08

    Abstract: The separation of alkadienes from close-boiling alkenes by extractive distillation employes as solvent N-methyl-2-thiopyrrolidone, alone or in admixture with unsubstituted sulfolane (cyclotetramethylene sulfone), or a mixture of unsubstituted sulfone and N-methyl-2-pyrrolidone. The separation of cycloalkadienes from close-boiling alkadienes by extractive distillation employs N-methyl-2-thiopyrrolidone as solvent.

    Abstract translation: 通过萃取蒸馏将烯二烯与近沸点烯烃的分离单独或与未取代的环丁砜(环四亚甲基砜)或未取代的砜和N-甲基-2-吡咯烷酮的混合物一起使用作为溶剂N-甲基-2-硫代吡咯烷酮。 通过萃取蒸馏分离环烯二烯与近沸点烯二酸,采用N-甲基-2-硫代吡咯烷酮作为溶剂。

    Catalytic cracking process
    29.
    发明授权
    Catalytic cracking process 失效
    催化裂化过程

    公开(公告)号:US4639308A

    公开(公告)日:1987-01-27

    申请号:US819316

    申请日:1986-01-16

    Applicant: Fu-Ming Lee

    Inventor: Fu-Ming Lee

    CPC classification number: C10G11/18

    Abstract: A process for catalytically cracking a hydrocarbon-containing feed stream, preferably having an API.sup.60 gravity of about 5-30, wherein at least a portion of off-gases is treated so as to remove C.sub.2 -C.sub.4 olefins therefrom, and the off-gas stream having a reduced olefin content is then recycled to the catalytic cracking zone.

    Abstract translation: 一种用于催化裂化含烃进料流的方法,优选具有约5-30的API60重力,其中处理至少一部分废气以从其中除去C 2 -C 4烯烃,并且废气流 然后将具有降低的烯烃含量再循环到催化裂化区。

    Filters for paramagnetic and diamagnetic substances
    30.
    发明授权
    Filters for paramagnetic and diamagnetic substances 有权
    顺磁性和抗磁性物质的过滤器

    公开(公告)号:US09352331B1

    公开(公告)日:2016-05-31

    申请号:US14866936

    申请日:2015-09-26

    Abstract: A high capacity magnetic filter separates diamagnetic and/or paramagnetic substances from fluid streams. Diamagnetic solid substances are magnetized under an external magnetic field through coordinated interaction of diamagnetic solid substances with an inducement paramagnetic material (IPM). The magnetic filter serves as a separation zone created by the presence of IPM and magnets that are shielded from the IPM by non-magnetic sleeves or partitions. The IPM in the void volume between the magnets affords large surface area onto which diamagnetic and paramagnetic materials can contact and be attracted to. The relative position and distance of the magnetic source, such a magnetic bar or electromagnet, to the solid mixture of diamagnetic and IPM are adjusted to induce sufficiently strong magnetism in the diamagnetic solids which causes the diamagnetic solids to be attracted by the magnetic field as well. Both diamagnetic and paramagnetic substances can be removed from a liquid or gas.

    Abstract translation: 高容量磁性过滤器将抗磁性和/或顺磁性物质与流体流分离。 抗磁固体物质通过反磁性固体物质与诱导顺磁材料(IPM)的协调相互作用在外部磁场下被磁化。 磁性过滤器用作由IPM和由非磁性套筒或隔板与IPM屏蔽的磁体而产生的分离区域。 在磁体之间的空隙体积中的IPM提供大的表面积,抗磁性和顺磁性材料可以接触并吸引到其上。 调整磁源(如磁条或电磁体)到抗磁性和IPM的固体混合物的相对位置和距离,以在抗磁固体中引起足够强的磁性,这导致抗磁固体也被磁场吸引 。 反磁性和顺磁性物质都可以从液体或气体中去除。

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