7699-41-4Relevant articles and documents
AlCl3 immobilized on silicic acid as efficient Lewis acid catalyst for highly selective preparation of dicyclohexylamine from the vapor phase hydroamination of cyclohexene with cyclohexylamine
Ai, Qiuhong,Jian, Jian,Liu, Pingle,Luo, He'an,Wen, Jingbin,You, Kuiyi,Zhao, Fangfang
, (2020/07/21)
An efficient and stable Lewis acid catalyst silicic acid (SA)-immobilized AlCl3 (AlCl3-SA) has been successfully prepared by the chemical bonding method in this work. The results indicated that the immobilized 15percentAlCl3-SA exhibited excellent catalytic performance and stability in the vapor phase hydroamination of cyclohexene with cyclohexylamine. 58.5percent cyclohexene conversion with 98.7percent selectivity to dicyclohexylamine was still maintained after running for over 150 h, and the space time yield of dicyclohexylamine was 142.6 mol/h·m3. The developed AlCl3-SA catalyst had the advantages of low cost and long-time stable activity. Maybe this work provides a promising approach for hydroamination of olefins to amines.
COLLOIDAL COMPOSITIONS AND METHODS OF PREPARING SAME
-
, (2018/06/04)
Colloidal compositions and methods of preparing same are provided. The colloidal compositions include a silicate and a metal dispersed therein. The colloidal compositions can further include a stabilizer, such as a quaternary amine, to enhance the and dispersion of the metal loading within the silicate. The colloidal compositions can be made such that the metal is dispersed within the silicate in a controlled manner.
Conversion of benzyl alcohol to benzonitrile over a Cu10.3/SiO2 catalyst
Zhang, Yuecheng,Zhao, Xiaofu,Zhang, Hongyu,Yan, Xiang,Zhao, Jiquan
, p. 45 - 53 (2016/05/09)
A Cu10.3/SiO2 catalyst was prepared for the conversion of benzyl alcohol to benzonitrile through amination-dehydrogenation process. The catalyst showed high activity in the reaction, and a yield as high as 98.0% was reached under the optimized conditions. The catalyst was characterized by XRD, TEM-EDX, TG-DSC, N2 adsorption-desorption and IR of absorbed pyridine methods. The characterization results disclosed that the doping of copper created Lewis acid sites in the matrix of SiO2. The doped copper in the fresh catalyst was present in CuO state, which was reduced to elemental Cu by H2 generated in situ in the catalytic run. The characterization results also disclosed that the catalyst deactivation was mainly caused by the carbonaceous deposition on the surface of the catalyst in the catalytic reaction. The experimental results confirmed that most activity of the catalyst can be recovered at 550°C online by blowing air into the reactor. Partial sintering of copper particles took place during the catalytic run, which led to the slight decreases of Lewis acidity and dehydrogenation capacity, therefore, caused deviation of the performance of the regenerated Cu10.3/SiO2 catalyst from that of the fresh one.
Silicic Acid Componenet Supplying Agent For Algae And Method For Supplying Silicic Acid Component To Algae
-
Page/Page column 2-3, (2009/05/28)
A silicic acid component supplying agent for algae to be added to water in which algae requiring silicic acid to grow live, in order to supply a silicic acid component to the algae. The agent includes a silicic acid gel, as a main component, obtained by previously causing a reaction between an alkali metal silicate and a mineral acid within a system other than the water in which the algae live.
Process for making highly active and selective catalysts for the production of unsaturated nitriles
-
, (2008/06/13)
An improved catalyst for the production of unsaturated nitriles from their corresponding olefins, the catalyst having the atomic ratios described by the empirical formula BiaMobVcSbdNbeAfBgOx and methods of making and using the same.
Hydrolysable and polymerizable oxetane silanes
-
, (2008/06/13)
Polymerizable and hydrolysable oxetane silanes and in particular silicic acid condensates which can be prepared therefrom are described, which exhibit only a low volume shrinkage on polymerization and produce polymers with high mechanical strength and therefore can be used above all as dental material or constituent thereof.
Organic-inorganic hybrid composites for dental restorative material
-
, (2008/06/13)
Alkoxides with polymerizable groups are single source precursors for organic-inorganic hybrid composites possessing good mechanical properties. Additional function groups of the alkoxides provide enhanced adhesion to other surfaces, such as dentin. The selection of specific organic monomers having functional groups that are responsible for enhanced properties of the organic-inorganic hybrid composites is important. Single source precursors containing the desired functional groups are condensed and polymerized into the organic-inorganic hybrid composites with enhanced properties which are particularly useful as dental composites.
Isoprene process
-
, (2008/06/13)
The present invention is directed to a process for producing dienes which involves reacting a reaction mixture of tertiary alkyl ether and a source of oxygen over two functionally distinct catalysts under reaction conditions sufficient to produce high yields of the dienes with minimal recycle of the ether. The two functionally different catalysts are selected from a group of bifunctional catalysts having both oxidation sites and acidic sites and monofunctional acidic catalysts, such as bifunctional catalysts containing components selected from a group of oxides of vanadium, tungsten, molybdenum, copper, iron, chromium, and uranium and mixtures thereof; and monofuctional acid catalysts such as acid treated montmorillonite clays, and acid catalysts comprising an inorganic amorphous or substantially amorphous oxide material comprising the following components reacted therein: wherein M1 is at least one Group IIIB element selected from the group consisting of Al, Ga, In and Tl; M2 is at least one Group IVb element selected from the group of Si, Sn and Ge. The bifunctional catalysts are used in a first stage reaction, and the monofunctional acidic catalysts are used in a second stage reaction.
Preparation for prevention of emission of mercury from amalgam fillings and method
-
, (2008/06/13)
A method of preventing or decreasing the emission of mercury vapor in the mouth, from a mercury amalgam filling, comprising contacting the amalgam filling with an oral composition containing sulfur in an amount sufficient to reduce or eliminate the emission of mercury or mercury vapor. The oral composition may be in the form of a toothpaste, chewing gum, mouthwash water, mouth spray, or the like.
Process for the production of bis-(dialkoxythio-phosphoryl)-trisulfides
-
, (2008/06/13)
The elminination of sulfur from bis-(dialkoxythiophosphoryl)-tetrasulfides to bis-(dialkoxythiophosphoryl)-trisulfides on certain silicate fillers, carbon black and aluminium oxide is quantitative.
