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    Production of vinylidene fluoride from 1,1-difluoroethane
    212.
    发明公开
    Production of vinylidene fluoride from 1,1-difluoroethane 失效
    Verfahren zur Herstellung von Vinylidenfluorid aus 1,1-Dichlorethan。

    公开(公告)号：EP0461297A1

    公开(公告)日：1991-12-18

    申请号：EP90112560.9

    申请日：1990-07-02

    Applicant: ATOCHEM NORTH AMERICA, INC.

    Inventor： Bolmer, Michael Sheppard ,  Elsheikh, Maher Yousef

    IPC: C07C21/18 ,  C07C17/00

    CPC classification number: C07C17/357 ,  C07C21/18

    Abstract: 1,1-Difluoroethane is converted to vinylidene fluoride by contact with a Cr₂O₃/Al₂O₃ catalyst, in the presence of a co-reactant gas, at a reaction temperature of from about 300°C to about 700°C. The co-reactant gas advantageously comprises air, oxygen, carbon dioxide, or mixtures thereof.

    Abstract translation: 在共反应物气体存在下，在约300℃至约700℃的反应温度下，通过与Cr 2 O 3 / Al 2 O 3催化剂接触将1,1-二氟乙烷转化为偏氟乙烯。共反应气体 有利地包括空气，氧气，二氧化碳或其混合物。

    POSITIVE DISPLACEMENT PISTON PUMP
    215.
    发明授权
    POSITIVE DISPLACEMENT PISTON PUMP 失效
    积极位移活塞泵

    公开(公告)号：EP0233200B1

    公开(公告)日：1991-09-11

    申请号：EP86903948.7

    申请日：1986-05-28

    Applicant: ELF ATOCHEM NORTH AMERICA, INC.

    Inventor： LINDNER, Georg, H.

    IPC: F04B7/06

    CPC classification number: F04B7/06

    Abstract: A positive displacement piston pump (110) includes a cylinder (112) having a working end (114), an inlet port (118), an outlet port (120) and a working chamber bounded by the outlet port and the working end; a piston (128) rotatably and reciprocably movable in the cylinder between a retracted position and an extended position, the piston including a free end having a recessed section alternately in fluid communication with the inlet port and the outlet port; a drive motor rotatably and reciprocably driving the piston in the cylinder; a yoke (154) and ball and socket joint (158) pivotally connecting the piston to the drive motor; a base (136) having an upper surface (136a) with an elongated slot (172) below the pivot point of the piston and an arcuate slot (174) adjacent the opposite end of the cylinder; and first and second pivot pins (188, 190) secured to a swivel plate (182) which is, in turn, secured to the cylinder through a vertical column (180), whereby the recessed section is positioned entirely in the working chamber when the piston is at the end of its pressure stroke, regardless of the angle between the piston and the drive motor.

    Process for converting carbon disulfide to hydrogen sulfide in hydrogen sulfide/carbon disulfide mixtures
    217.
    发明公开
    Process for converting carbon disulfide to hydrogen sulfide in hydrogen sulfide/carbon disulfide mixtures 失效
    一种用于在Kohlendisulfit和硫化氢的混合物Kohlendisulfit转化成硫化氢的过程。

    公开(公告)号：EP0441146A1

    公开(公告)日：1991-08-14

    申请号：EP91100605.4

    申请日：1991-01-18

    Applicant: ELF ATOCHEM NORTH AMERICA, INC.

    Inventor： Schatz, George Robert

    IPC: C01B17/16

    CPC classification number: C01B17/165

    Abstract: A process for converting carbon disulfide (CS₂) to hydrogen sulfide (H₂S) in mixtures of H₂S and CS₂ is provided. The H₂S/CS₂ mixture is combined with water to form a hydrolysis feed mixture. The hydrolysis feed mixture is passed through a hydrolysis reactor containing e.g., an alumina-based catalyst, wherein a substantial portion of the CS₂ is converted to additional H₂S. A vapor product comprising H₂S, CO₂, unreacted H₂O, unconverted CS₂ and sulfur is formed by the hydrolysis reaction. The vapor product is cooled to form a H₂S/CO₂ vapor phase and a sour water condensate phase. The H₂S/CO₂ vapor phase is separated from the sour water condensate phase and subsequently recovered. The sour water condensate phase, which contains small amounts of solid sulfur particles, is optionally then combined with additional CS₂ and decanted to form a sulfur-free sour water layer and a CS₂ layer containing dissolved sulfur. The sour water layer is recycled and combined with the original H₂S/CS₂ mixture. The CS₂ layer is recycled to a sulfur removal device to remove the sulfur dissolved in the CS₂.

    Abstract translation: 提供了一种用于二硫化碳（CS 2）转化为在H 2 S的混合物和CS2硫化氢（H2S）的过程。 的H 2 S / CS2混合物与水混合，以形成水解混合物进料。 水解进料混合物通过水解反应器含有E. G.基于氧化铝的催化剂的，通过，worin的CS2的相当一部分被转化成额外的H 2 S. 蒸气产品，包括H 2 S，CO 2，未反应的H 2 O，未转化的CS2和硫通过水解反应而形成。 蒸汽产物被冷却以形成H 2 S / CO 2蒸汽相和酸性水冷凝物相。 的H 2 S / CO 2蒸气相从酸性水冷凝物相分离，并随后回收。 酸性水冷凝物相，其中含有固体硫颗粒的少量，任选然后用另外的CS2合并，并倾析以形成无硫酸性水层和层CS2含溶解的硫。 酸性水层再循环并与原来的H 2 S / CS2混合物合并。 所述CS2层再循环到硫去除装置来去除CS2溶解的硫。

    Derivatives of N-hals-substituted amic acid hydrazides
    219.
    发明公开
    Derivatives of N-hals-substituted amic acid hydrazides 失效
    衍生缬氨酸N-取代亚胺酰肼。

    公开(公告)号：EP0434080A1

    公开(公告)日：1991-06-26

    申请号：EP90125068.8

    申请日：1990-12-21

    Applicant: ELF ATOCHEM NORTH AMERICA, INC.

    Inventor： MacLeay, Ronald Edward ,  Lange, Harold Carl

    IPC: C07D211/58 ,  C08K5/3435

    CPC classification number: C08K5/3435 ,  C07D211/58 ,  Y02P20/582 ,  C08L23/10

    Abstract: N-(2,2,6,6-tetraalkyl-4-piperidinyl)amic acid hydrazides contain a light stabilizing group, a heat stabilizing group and an amic acid hydrazide functionality in the same molecule. The amic acid hydrazide functionality in the compounds enhances the photooxidative stabilizing properties of the hindered amine groups and contributes thermal and oxidative stabilizing and metal complexing properties to the compounds. The novel compounds are excellent light stabilizers for polyolefins, have low volatility and are not readily lost from polymeric systems via volatilization, migration or extraction.

    Abstract translation: N-（2,2,6,6-四烷基-4-哌啶基）酰胺酰肼在同一分子中含有光稳定基团，热稳定基团和酰胺酸酰肼官能团。 化合物中的酰胺酸酰肼官能团增强受阻胺基团的光氧化稳定性质，并且有助于化合物的热和氧化稳定和金属络合性质。 新型化合物是聚烯烃的优异光稳定剂，具有低挥发性，并且不容易通过挥发，迁移或萃取从聚合物体系中消失。

    N,N'-hydrocarbylenebis(N-hals-substituted amic acid hydrazides) and their derivatives
    220.
    发明公开
    N,N'-hydrocarbylenebis(N-hals-substituted amic acid hydrazides) and their derivatives 失效
    N，N'-烃基 - 双 - （N-甲基） - 亚基酰肼。

    公开(公告)号：EP0434079A1

    公开(公告)日：1991-06-26

    申请号：EP90125067.0

    申请日：1990-12-21

    Applicant: ELF ATOCHEM NORTH AMERICA, INC.

    Inventor： MacLeay, Ronald Edward

    IPC: C07D211/58 ,  C08K5/3435 ,  C07D401/14

    CPC classification number: C07D401/14 ,  C07D211/58 ,  C08K5/3435

    Abstract: N,N'-hydrocarbylenebis[N-(2,2,6,6-tetraalkyl-4-piperidinyl)amic acid hydrazides] and their derivatives are useful for stabilizing polymeric systems which are subject to degradation and/or discoloration upon exposure to heat and/or light. The novel compounds contain at least two hindered amine light stabilizing groups and two hydrazide or hydrazide derivative thermal oxidative stabilizing groups.
    The novel compounds are excellent light stabilizers for polyolefins, have low volatility and are not readily lost from polymeric systems via volatilization, migration or extraction.

    Abstract translation: N，N'-亚烃基双[N-（2,2,6,6-四烷基-4-哌啶基）酰胺酰肼]及其衍生物可用于稳定在暴露于热时经历降解和/或变色的聚合物体系 和/或光。 新化合物含有至少两个受阻胺光稳定基团和两个酰肼或酰肼衍生物热氧化稳定基团。 新型化合物是聚烯烃的优异光稳定剂，具有低挥发性，并且不容易通过挥发，迁移或萃取从聚合物体系中消失。

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