Silica gel comprising guanidine carbonate
    31.
    发明申请
    Silica gel comprising guanidine carbonate 审中-公开
    含有碳酸胍的硅胶

    公开(公告)号:US20130068139A1

    公开(公告)日:2013-03-21

    申请号:US13617807

    申请日:2012-09-14

    CPC classification number: C08K3/28 C01B33/148 D21H17/68 D21H21/10

    Abstract: A process of preparing a silica sol is described. The process involves reacting a fresh sol with guanidine carbonate. The reaction may be conducted in the presence of a base (e.g., sodium water glass), and at a pH of from 8 to 12. The process of the present invention may also include concentrating steps. The silica sol prepared by the method of the present invention has a BET surface area of greater than or equal to 100 m2/g, and contains from 0.05 to 15% by weight of gaunidinium ions, based on the total weight of the silica gel.

    Abstract translation: 描述了制备二氧化硅溶胶的方法。 该方法包括使新鲜的溶胶与碳酸胍反应。 反应可以在碱(例如钠水玻璃)存在下进行,pH为8〜12。本发明的方法还可以包括浓缩步骤。 通过本发明的方法制备的二氧化硅溶胶具有大于或等于100m 2 / g的BET表面积,并且基于硅胶的总重量含有0.05至15重量%的高锰酸根离子。

    Silica gel comprising guanidine carbonate
    32.
    发明授权
    Silica gel comprising guanidine carbonate 失效
    含有碳酸胍的硅胶

    公开(公告)号:US08299131B2

    公开(公告)日:2012-10-30

    申请号:US10520574

    申请日:2003-07-07

    CPC classification number: C08K3/28 C01B33/148 D21H17/68 D21H21/10

    Abstract: A process of preparing a silica sol is described. The process involves reacting a fresh sol with guanidine carbonate. The reaction may be conducted in the presence of a base (e. g. , sodium water glass), and at a pH of from 8 to 12. The process of the present invention may also include concentrating steps. The silica sol prepared by the method of the present invention has a BET surface area of greater than or equal to 100 m2/g, and contains from 0.05 to 15% by weight of gaunidinium ions, based on the total weight of the silica gel.

    Abstract translation: 描述了制备二氧化硅溶胶的方法。 该方法包括使新鲜的溶胶与碳酸胍反应。 反应可以在碱(例如钠水玻璃)存在下进行,pH为8〜12。本发明的方法还可以包括浓缩步骤。 通过本发明的方法制备的二氧化硅溶胶具有大于或等于100m 2 / g的BET表面积,并且基于硅胶的总重量含有0.05至15重量%的高锰酸根离子。

    Process for separating mixtures of m- and p-dichlorobenzene
    35.
    发明授权
    Process for separating mixtures of m- and p-dichlorobenzene 失效
    分离对 - 二氯苯混合物的方法

    公开(公告)号:US5386067A

    公开(公告)日:1995-01-31

    申请号:US252154

    申请日:1994-06-01

    CPC classification number: C07C17/389

    Abstract: Mixtures of m- and p-dichlorobenzene can be separated by treating such mixtures in the liquid phase with a pentasil zeolite at from 20.degree. to 250.degree. C., a filtrate enriched in m-dichlorobenzene being removed and the p-dichlorobenzene being obtained by desorption of the pentasil zeolite. The pentasil zeolites may contain, as exchangeable cations, protons, cations of the first or second main group of the Mendeleev Periodic System, cations of the rare earth metals or a mixture of a plurality thereof. In order to prepare the liquid phase a solvent is used that belongs to the group of cyclic saturated hydrocarbons having 5 to 15 carbon atoms, alkyl-substituted aromatic hydrocarbons having 8 to 12 carbon atoms, and halogen-substituted aromatic hydrocarbons having 6 to 10 carbon atoms and 1 to 3 halogen atoms. The solvents ethylbenzene, chlorobenzene, p-xylene, p-chlorotoluene and dichlorobenzene are excepted. A mixture of a plurality of these solvents may also be used.

    Abstract translation: 可以通过在20至250℃下用pentasil沸石处理液相中的这种混合物来分离对 - 二氯苯的混合物,除去富含间二氯苯的滤液,将对二氯苯由 五硅沸石的解吸。 戊二烯沸石可以包含作为可交换阳离子的质子,门多列夫周期系统的第一或第二主要组分的阳离子,稀土金属的阳离子或其多个混合物。 为了制备液相,使用属于具有5至15个碳原子的环状饱和烃基团,具有8至12个碳原子的烷基取代的芳族烃和具有6至10个碳原子的卤素取代的芳族烃的溶剂 原子和1至3个卤素原子。 溶剂乙苯,氯苯,对二甲苯,对氯甲苯和二氯苯除外。 也可以使用多种这些溶剂的混合物。

    Process for the preparation of dialkyl carbonates
    36.
    发明授权
    Process for the preparation of dialkyl carbonates 失效
    制备碳酸二烷基酯的方法

    公开(公告)号:US5360922A

    公开(公告)日:1994-11-01

    申请号:US23302

    申请日:1993-02-26

    CPC classification number: B01J29/064 C07C68/00 Y02P20/582

    Abstract: Dialkyl carbonates can be prepared by the reaction of carbon monoxide with alkyl nitrites in a continuous gas phase reaction, using a platinum group metal catalyst on an alumosilicate zeolite having acidic centers, preferably in the H.sup.+ form, as a support, which catalyst may optionally comprise additional material of a compound of antimony, bismuth, aluminum, copper, vanadium, niobium, tantalum, tin, iron, cobalt, nickel or a mixture of a plurality of these, and hydrogen halide being added in the course of the reaction intermittently or continuously. In this reaction, the dialkyl carbonates are formed with almost quantitative selectivity; the corresponding dialkyl oxalates cannot be detected in most cases.

    Abstract translation: 碳酸二烷基酯可以通过在连续气相反应中使用一氧化碳与烷基亚硝酸盐的反应来制备,使用铂族金属催化剂在具有酸性中心的铝硅酸盐沸石,优选以H +形式作为载体,该催化剂可任选地包含 锑,铋,铝,铜,钒,铌,钽,锡,铁,钴,镍或它们中的多种的混合物的化合物的附加材料和在反应过程中间歇或连续地加入的卤化氢 。 在该反应中,以几乎定量的选择性形成碳酸二烷基酯; 在大多数情况下不能检测到相应的草酸二烷基酯。

    Process for the production of molecular sieve granulates
    37.
    发明授权
    Process for the production of molecular sieve granulates 失效
    生产分子筛颗粒的方法

    公开(公告)号:US5098448A

    公开(公告)日:1992-03-24

    申请号:US680601

    申请日:1991-04-01

    CPC classification number: B01J2/14 B01J2/28 B01J20/183

    Abstract: A process for the production of silica-bound zeolite granulates is disclosed, wherein zeolite to be formed into a granulate is mixed with silica sol. The process is carried out by adding aqueous alkali metal silicate to the silica sol immediately before the silica sol is mixed with the solid zeolite to be granulated. By the described process, granulates of various grain sizes can be obtained, and the resultant granulates can have a narrow grain size distribution.

    Abstract translation: 公开了一种生产二氧化硅结合的沸石颗粒的方法,其中将形成颗粒的沸石与硅溶胶混合。 该方法是在将二氧化硅溶胶与要造粒的固体沸石混合之前,向二氧化硅溶胶中加入碱金属硅酸盐。 通过所述方法,可以获得各种粒径的颗粒,并且所得到的颗粒可以具有窄的粒度分布。

    Process for the removal of iodine and organic iodine compounds from
gases and vapors using silver-containing zeolite of the faujasite type
    40.
    发明授权
    Process for the removal of iodine and organic iodine compounds from gases and vapors using silver-containing zeolite of the faujasite type 失效
    使用八面沸石类的含银沸石从气体和蒸气中除去碘和有机碘化合物的方法

    公开(公告)号:US4913850A

    公开(公告)日:1990-04-03

    申请号:US318841

    申请日:1989-03-06

    CPC classification number: B01D53/68

    Abstract: Iodine and organic iodine compounds which may be radioactive and which may be found in waste gases or vapors from nuclear reactors can be removed from such gases or vapors by passing the iodine or organic iodine compound-containing gases or vapors through a layer of binder-free silver-exchanged molecular sieve granulates of the faujasite type.

    Abstract translation: 可以通过使含碘或有机碘化合物的气体或蒸汽通过一层无粘合剂的物质,可以从这种气体或蒸气中除去可能是放射性的并且可能存在于来自核反应堆的废气或蒸汽中的碘和有机碘化合物 银盐交换分子筛颗粒的八面沸石型。

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