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    • 74. 发明授权
    • Catalytic gas phase fluorination of 243db to 1234yf
    • 催化气相氟化243db至1234yf
    • US08207384B2
    • 2012-06-26
    • US12978288
    • 2010-12-23
    • Laurent WendlingerAnne PigamoDominique Deur-Bert
    • Laurent WendlingerAnne PigamoDominique Deur-Bert
    • C07C17/00
    • C07C17/206B01J23/866B01J37/26C07C17/25C07C17/42C07C21/08Y02P20/582C07C19/10C07C21/18
    • The invention provides a process for preparing 1234yf, comprising: (i) contacting 243db with hydrogen fluoride HF in gas phase in the presence of a fluorination catalyst under conditions sufficient to produce a reaction mixture; (ii) separating the reaction mixture into a first stream comprising HCl, 1234yf and a second stream comprising HF, 1233xf and 245cb; (iii) recycling at least a part of the second stream at least in part back to step (i). The invention also provides a process for preparing 1234yf, comprising: (i) contacting 243db with hydrogen fluoride HF in gas phase in the presence of a fluorination catalyst under conditions sufficient to produce a reaction mixture; (ii) separating the reaction mixture into HCl and a stream containing the fluorinated products; (iii) separating said stream containing the fluorinated products into a first stream comprising 1234yf and a second stream comprising HF, 1233xf and 245cb; (iv) recycling at least a part of the second stream at least in part back to step (i).
    • 本发明提供一种制备1234yf的方法,其包括:(i)在足以产生反应混合物的条件下,在氟化催化剂存在下,使气体中的243db与氟化氢HF接触; (ii)将反应混合物分离成包含HCl,1234yf和包含HF,1233xf和245cb的第二料流的第一料流; (iii)至少部分地将第二流的至少一部分再循环回到步骤(i)。 本发明还提供了一种制备1234yf的方法,其包括:(i)在足以产生反应混合物的条件下,在氟化催化剂存在下,将气体中的243db与氟化氢HF气相接触; (ii)将反应混合物分离成HCl和含有氟化产物的料流; (iii)将含有氟化产物的物流分离成包含1234yf的第一物流和包含HF,1233xf和245cb的第二物流; (iv)至少部分地将至少一部分第二流再循环到步骤(i)。
    • 76. 发明授权
    • Method for recovering trans-1,2-dichloroethene
    • 回收1,2-二氯乙烯的方法
    • US07268262B2
    • 2007-09-11
    • US10834408
    • 2004-04-29
    • Clark S. GraybillStephen R. Lester
    • Clark S. GraybillStephen R. Lester
    • C07C17/358C07C21/02
    • C07C17/38C07C17/383C07C17/395Y02P20/127C07C21/08
    • Describes a method for recovering trans-1,2-dichloroethene from a liquid feed composition comprising both the cis-and trans-isomers of 1,2-dichloroethene and contaminating amounts of other chlorinated hydrocarbons, e.g., lower alkyl chlorinated hydrocarbons, such as C1-C2 chlorinated hydrocarbons. In one of the described methods, the liquid feed composition is introduced into a first distillation column 10 wherein the stereoisomers and chlorinated hydrocarbons more volatile than the stereoisomers are removed as overhead 12 and charged to a second distillation column 20. In column 20, the stereoisomers are separated from the more volatile chlorinated hydrocarbons, and a bottoms fraction 24 comprising the stereoisomers is charged to a reactive distillation column 30 wherein the cis-isomer is isomerized to the trans-isomer in the liquid phase and in the presence of an organic free-radical initiator, e.g., an azonitrile initiator. Substantially pure trans 1,2-dichloroethene is recovered as overhead 32 from reactive distillation column 30.
    • 描述了从包含1,2-二氯乙烯的顺式和反式异构体和污染量的其它氯化烃(例如低级烷基氯化烃)的液体进料组合物中回收反式1,2-二氯乙烯的方法,例如C 1 - 2 C 2氯化烃。 在所述方法之一中,将液体进料组合物引入第一蒸馏塔10中,其中立体异构体和比立体异构体更易挥发的氯代烃作为塔顶馏出物12被除去并装入第二蒸馏塔20。 在第20列中,将立体异构体与更易挥发的氯代烃分离,将包含立体异构体的塔底馏分24装入反应性蒸馏塔30中,其中顺式异构体在液相中异构化为反式异构体, 存在有机自由基引发剂,例如偶氮腈引发剂。 从反应蒸馏塔30回收基本上纯的反式1,2-二氯乙烯作为塔顶馏出物32。
    • 77. 发明申请
    • 1,2-Dichloroethylene compositions
    • 1,2-二氯乙烯组合物
    • US20060014661A1
    • 2006-01-19
    • US10780449
    • 2004-02-13
    • Michael DobraskoRonald Olinger
    • Michael DobraskoRonald Olinger
    • C11D17/00
    • C23G5/0289C07C17/42C23G5/02806C23G5/0288H05K3/26C07C21/08
    • Describes compositions of 1,2-dichloroethylene, particularly trans-1,2-dichloroethylene, stabilized with effective stabilizing amounts of a combination of (a) C3 to C12 alkylene oxide, e.g., butylene oxide, (b) alcohol chosen from aliphatic and cycloaliphatic alcohols having from 2 to 8 carbon atoms, e.g., isopropanol, and (c) a material chosen from (i) C1 to C5 alkoxyphenol, e.g., 4-methoxyphenol, (ii) free radical stabilizer having at least one 2,2,6,6-tetra(lower alkyl)-1-piperidinyloxy-yl group, and (iii) mixtures of (i) and (ii). Also describes use of such compositions for vapor degreasing of soiled articles, e.g., metal parts and soldered circuit boards.
    • 描述了用有效稳定量的(a)C3至C12环氧烷的组合(例如环氧丁烷)稳定的1,2-二氯乙烯,特别是反式-1,2-二氯乙烯的组合物,(b)选自脂族和脂环族 具有2至8个碳原子的醇,例如异丙醇,和(c)选自(i)C1至C5烷氧基苯酚的物质,例如4-甲氧基苯酚,(ii)具有至少一个2,2,6 ,6-四(低级烷基)-1-哌啶氧基 - 基,和(iii)(i)和(ii)的混合物。 还描述了这种组合物用于蒸汽去污污染物品例如金属部件和焊接电路板的用途。
    • 80. 发明授权
    • Inhibitors for aqueous phase, radiation polymerization
    • 水相抑制剂,辐射聚合
    • US3714008A
    • 1973-01-30
    • US3714008D
    • 1970-05-12
    • JAPAN ATOMIC ENERGY RES INST
    • TAKEHISA MSENRUI S
    • C07C7/20C07C17/42C08F2/38C08F2/54C08D1/00C08F1/16
    • C07C17/42C07C7/20C08F2/38C07C15/46C07C11/06C07C11/08C07C21/06C07C21/08
    • In the polymerization, in which an aqueous phase is employed, of ethylene, or ethylene and other unsubstituted or substituted olefinic monomers by means of an ionizing radiation, formation of an undesirable polymer in the aqueous phase of the reaction system is inhibited by using specific polymerization inhibitors. The inhibitors which have no adverse effect on the polymerization in the non-aqueous phase, comprise the electrolytes which have strong oxidizing action and/or react at high reaction rate with active species such as H radicals, OH radicals and/or hydrated electrons formed by ionizing radiation. According to the present invention, adhesion of undesirable polymer to the reactor walls during polymerization reaction is prevented and contamination which lowers the quality of the main polymer is eliminated.
    • 在使用水相的乙烯或乙烯和其它未取代或取代的烯属单体的聚合中,通过电离辐射,在反应体系的水相中形成不需要的聚合物通过使用特定的聚合来抑制 抑制剂。 对非水相中的聚合没有不利影响的抑制剂包括具有强氧化作用和/或以高反应速率与活性物质如H自由基,OH自由基和/或水合电子反应的电解质, 电离辐射。 根据本发明,防止了聚合反应期间不期望的聚合物对反应器壁的粘附,并且消除了降低主聚合物质量的污染。