摘要:
A method for the preparation of a composite material including at least silicon nanowires and tin, the method including the use of a tin halide, as a catalyst for preparing silicon nanowires.
摘要:
A novel catalyst, a use thereof and a method for treating PCB inked waste by using the same are disclosed. The catalyst of the present disclosure is represented by the following formula (I): [M(O)a]m+Xn− (I) herein M, X, a, m and n are defined in the specification.
摘要:
The present invention concerns spheroidal alumina particles, catalysts comprising such particles as a support and a process for the production of spheroidal alumina particles, comprising the following steps: a) preparing a suspension comprising water, an acid and at least one boehmite powder for which the ratio of the crystallite dimensions in the [020] and [120] directions obtained using the Scherrer X-ray diffraction formula is in the range 0.7 to 1; b) adding a pore-forming agent, a surfactant and optionally water, or an emulsion comprising at least one pore-forming agent, a surfactant and water to the suspension of step a); c) mixing the suspension obtained in step b); d) shaping the spheroidal particles by the oil-drop method using the suspension obtained in step c); e) drying the particles obtained in step d); f) calcining the particles obtained in step e).
摘要:
The present invention relates to the technical field of polymer composites, in particular to a poly (cyclic butylene terephthalate)/silicon dioxide nanocomposite, wherein the added silicon dioxide is catalyst-modified nanosilicon dioxide.
摘要:
A method for synthesising dimethyl carbonate from methanol and urea, in which a saline ureic medium is used that includes at least one inorganic salt selected from the group made up of zinc (Zn) (II) chloride, tin (Sn) chlorides and iron (Fe) (III) chloride, characterised in that: methanol, in the presence of a catalytic composition, is placed in contact with the saline ureic medium that is at least partially liquid at a temperature referred to as synthesis temperature, which is higher than 140° C., such that reaction vapours are produced; the reaction vapours are condensed, and a condensate of the reaction vapours is collected, including dimethyl carbonate; the method is carried out at atmospheric pressure. A method for enriching and purifying dimethyl carbonate is also described.
摘要:
A reactor for regenerating catalyst grains comprises a vessel having an oxychlorination zone superimposed over a calcining zone having a line for introducing gas. A chamber, disposed between oxychlorination and calcining zones, comprises an internal space located between two plates which are gas tight and impervious to catalyst grains. A plurality of tubes pass through the chamber to allow catalyst to pass from oxychlorination zone to calcining zone. A plurality of means pass through the chamber to allow calcining gas to pass from calcining zone to oxychlorination zone. At least one oxychlorination gas injection line opens into the internal space of the chamber. Each means for passage of calcining gas comprises at least one orifice communicating with the chamber internal space, and a means for evacuating gas which is permeable to gas and impermeable to catalyst grains.
摘要:
Intermetallic compounds, such as metal silicides, e.g., PdSi and/or Pd2Si, can be selectively prepared in a two step process including the steps of (1) vacuum impregnating silicon with a metal halide, and (2) ball milling the product of step (1).
摘要:
The Cu- and Ti-containing composition of the present invention contains titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, and at least one divalent copper compound represented by the following formula (1). The Cu- and Ti-containing composition production method of the present invention is characterized by including stirring a mixture containing titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, a divalent copper compound raw material represented by formula (2), water, and an alkaline compound, to thereby cause precipitation. The composition of the present invention exhibits excellent anti-viral property under light and in the dark, and excellent organic compound decomposition activity under light.
摘要:
A method for synthesis of lactic acid and its derivatives is provided. First, a mixture is prepared, which includes: at least one carbohydrate-containing raw material, at least one alcohol, at least one composite catalyst containing metal chloride(s) (MCln) and tin-containing compound(s), and at least one solvent, wherein M is selected from a group consisting of Li+, Na+ K+, Mg2+, Ca2+, Sr2+, Ga3+, In3+, Sb3+, Bi3+, Cr3+, Mn2+, Fe2+, Co2+, Ni2+, Zn2+, and n represents 1, 2 or 3. Then, the mixture is heated to obtain lactic acid and its derivatives. By using the above catalyst and method, it is capable of converting carbohydrate-containing raw material to lactic acid and its derivatives directly in a more efficient and economical way.
摘要:
A visible light sensitive photocatalyst including: a composite including a first metal oxide, a second metal oxide, and a heterojunction therebetween, wherein the first and second metal oxides each include a Group 11 metal, wherein a first bond between metal atoms of the first metal oxide has a length that is smaller than a Van der Waals distance between the metals of the first bond, wherein a second bond between metal atoms of the second metal oxide has a length that is smaller than a Van der Waals distance between the metals of the second bond, and, wherein the composite has a band gap energy of about 1.0 eV to about 2.5 eV.