通过液溶相与液氨(lq-NH 3)制备氮化镁(Mg 3 N 2)。为了避免氧化物污染,在没有任何氧气源(例如溶剂,起始原料和表面活性剂)的情况下进行合成。具体而言,溶致相用LQ-NH建立3在-50℃下作为极性相,庚烷作为非极性分散剂相,dimethyldioctylammonium碘(DDAI)作为表面活性剂,如己胺辅助表面活性剂,和二- ñ -丁基镁为起始原料。通过在氮气氛(N 2)。使用不同的电子显微镜和电子光谱技术详细研究了结构和纯度,尤其是没有氧气的情况。所获得的黄色Mg 3 N 2(在500°C加热)具有高孔隙率(比表面积:176 m 2 g -1;总孔体积:0.41 cm 3 g -1;微孔体积:0.13 cm 3 g -1)和关于CO 2吸附的良好选择性(CO 2吸收:108 mg g -1; N 2吸收:9 mg g -1;均为90 bar)。加热到600°C后,得到的黄色Mg
[EN] HALOGENATED HETEROALKENYL- AND HETEROALKYL-FUNCTIONALIZED ORGANIC COMPOUNDS AND METHODS FOR PREPARING SUCH COMPOUNDS<br/>[FR] COMPOSÉS ORGANIQUES HALOGÉNÉS À FONCTION HÉTÉROALCÉNYLE ET HÉTÉROALKYLE ET LEURS PROCÉDÉS DE PRÉPARATION
申请人:ARKEMA INC
公开号:WO2019067394A1
公开(公告)日:2019-04-04
A method for synthesizing halogenated organic compounds, such as halogenated alkenyl group-containing and halogenated alkyl group-containing compounds having a heteroatom (e.g., O,N.S) coupled to a carbon atom of a halogenated alkenyl or halogenated alkyl group, involves reacting a halogenated olefin such as a chloro-substituted trifluoropropenyl compound with an active hydrogen-containing organic compound such as an alcohol (e.g., an aliphatic monoalcohol, aliphatic polyalcohol, or a phenolic compound), a primary amine, a secondary amine or a thiol.
Acidic Three-Liquid-Phase Microemulsion Systems Based on Balanced Catalytic Surfactant for Epoxidation and Sulfide Oxidation under Mild Conditions
作者:Marion Fressancourt-Collinet、Bing Hong、Loïc Leclercq、Paul. L. Alsters、Jean-Marie Aubry、Véronique Nardello-Rataj
DOI:10.1002/adsc.201200514
日期:2013.1.11
tungstate has been designed as a balancedcatalyticsurfactant to form acidicthree-liquid-phasemicroemulsionsystems at room temperature in the presence of water, a non-chlorinated solvent and dimethyldioctylammonium salts (hydrogen sulfate and dihydrogen phosphate). The triphasic system is efficient for the oxidation of olefins, sulfides and thiophenes undermildconditions. Moreover, the recovery and
Process for the preparation cyano carboxylic acid esters
申请人:Lonza Ltd
公开号:EP2455365A1
公开(公告)日:2012-05-23
The present invention relates to a process for the preparation of a cyano carboxylic acid ester of the formula
wherein
R1 is a linear or branched C1-8 alkanediyl group; and R2 is a linear or branched alkyl group, a cycloalkyl group, or an aryl or arylalkyl group, wherein aryl is optionally substituted with one or more C1-8 alkyl groups; comprising reacting a halo carboxylic acid ester of the formula
wherein R1 and R2 are as defined above; and Hal is fluorine, chlorine, bromine or iodine;
in a reaction mixture comprising a homogeneous liquid phase, wherein the liquid phase consists of water and an organic solvent,
with an alkali metal cyanide in the presence of hydrogen cyanide, optionally in the presence of a catalyst, to obtain the cyano carboxylic acid ester of the formula (I).
Coreâshell magnetic coordination nanoparticles made of a soft core and a hard magnetic shell, containing anisotropic Co(II) ions, display a dramatic increase in their average blocking temperature with a coercive field value 25 times larger than that of the soft core, due to a large enhancement of the magnetic anisotropy.
Gypsum board with a fluorine-containing antifungal agent
申请人:Toreki William
公开号:US20090104144A1
公开(公告)日:2009-04-23
A novel gypsum board having improved antifungal properties is disclosed. The board comprises a gypsum core, front and back paper facings, and a polymeric antifungal agent effective at inhibiting fungal growth. A preferred polymeric antifungal agent is polyDADMAC or polyTMMC. The novel gypsum board further comprises a non-polymeric antifungal agent comprising a fluorine-containing quaternary ammonium compound. Preferred non-polymeric ammonium compounds include Tetra-n-butylammonium fluoride and Tetraethylammonium fluoride. The polymeric antifungal agent can be present in the gypsum core and/or on one or both of the paper facings. The non-polymeric antifungal agent may be encapsulated in a material or ionically associated with the polymeric antifungal agent to allow releases of the non-polymeric antifungal agent over time and/or upon exposure to moisture. Methods for preparing the aforementioned novel gypsum board are also disclosed.