Abstract:
Disclosed herein are methods for synthesizing 1,2,5,6-hexanetetrol (HTO), 1,6 hexanediol (HDO) and other reduced polyols from C5 and C6 sugar alcohols or R glycosides. The methods include contacting the sugar alcohol or R-glycoside with a copper catalyst, most desirably a Raney copper catalyst with hydrogen for a time, temperature and pressure sufficient to form reduced polyols having 2 to 3 fewer hydoxy groups than the starting material. When the starting compound is a C6 sugar alcohol such as sorbitol or R-glycoside of a C6 sugar such as methyl glucoside, the predominant product is HTO. The same catalyst can be used to further reduce the HTO to HDO.
Abstract:
The invention provides titanium dioxide fine particles, wherein nitrogen and at least one element selected from carbon, hydrogen, sulfur doped in titanium dioxide by heat-treating fine particles of a material of titanium dioxide at 500°C or more and 600°C or less in a reducing gas atmosphere containing nitrogen. The titanium fine particles exhibit a high photocatalytic activity than in the conventional art by irradiating a visible light such that they exhibit an isopropanol oxidation activity induced by visible light irradiation with a wavelength of 400 nm or more and 600 nm or less with excellent stability and durability of the photocatalytic activity.
Abstract:
Die Erfindung betrifft stabilisierte und sulfidierte Katalysatoren, enthaltend ein oder mehrere Sulfide von einem oder mehreren Metallen der Nebengruppe VI und/oder VIII des Periodensystems und einen porösen Träger, wobei der Katalysator einen Sauerstoffgehalt von 0,5 bis 0,20 mol pro Grammatom Metall aufweist.
Abstract:
A discrete carbon fibril characterized by a substantially constant diameter between about 3.5 and about 70 nanometers, length greater than about 5 times the diameter and less than about 100 times the diameter, an outer region of multiple essentially continuous layers of ordered carbon atoms and a distinct inner core region. The invention further concerns a plurality of such fibrils. The fibrils of this invention may be produced by contacting for an appropriate period of time and at a suitable pressure a suitable metal-containing particle with a suitable gaseous, carbon-containing compound, at a temperature between about 850°C and 1200°C, or by treating discrete carbon fibrils, characterized by a length greater than about 100 times the diameter. Carbon fibrils may also be continuously produced by continuously contacting for an appropriate period of time at suitable conditions. Another aspect of the invention concerns a composition of matter comprising a carbon fiber or a carbon plate and a plurality of fibrils. Carbon fibrils and compositions of matter comprising carbon fibrils are useful in composites having a matrix of e.g., an organic polymer, an inorganic polymer or a metal. In specific embodiments, the fibrils or the compositions of matter may be used to reinforce a structural material, to enhance the electrical or thermal conductivity of a material, to increase the surface area of an electrode or capacitor plate, to provide a support for a catalyst, or to shield an object from electromagnetic radiation.
Abstract:
A catalyst comprising a composition comprising a catalytic metal component, carbon and hydrogen deposited on a low surface area metal or metal alloy support is provided. Hydrocarbon treating and conversion processes utilizing the catalyst are also provided. The catalyst is particularly suitable for slurry processes.
Abstract:
The present invention discloses a method of quickly desorbing phosgene from a catalyst in a phosgene synthesizing tower when the catalyst in the phosgene synthesizing tower is replaced. The method is carried out by first purging out easily-desorbed phosgene from the catalyst activated carbon in the phosgene synthesizing tower with nitrogen gas, then purging with ammonia gas, and the ammonia gas is reacted with the hardly-desorbed phosgene in the catalyst of the phosgene synthesizing tower. Then the phosgene synthesizing tower is rinsed with a water gun and then dried with hot gas. The phosgene content at an outlet of the phosgene synthesizing tower after purging is below 0.5 ppm, which can significantly save the time of the phosgene synthesizing tower for purging the phosgene, greatly reduce the amount of nitrogen gas consumed, and improve the safety of the process operation.
Abstract:
The invention relates to a A household appliance (1) with at least one self-cleaning catalytically active surface containing at least one reactive oxygen species (ROS) generator (17), wherein the at least one ROS generator is selected from the group consisting of compounds with the formula (I), (II) or (III),
Ag-B-M-Sulfur (I)
wherein B is selected from the group consisting of Al, Ga, In, Sn, Tl, Pb and Bi; and M is selected from the group consisting of Ti, Zr, Cr, Mo, Mn, Fe, Ru, Ni, Pd, Cu, Zn and Cd; in particular the compound Ag-In-Ni-Sulfur;
MO q -A (II)
wherein q = 2 or 3; and M is selected from the group consisting of Zr, Ti, Cr, Mo, W and Mn; and A is acetylacetonate or a derivative thereof selected from the group consisting of compounds with the formula:
wherein R 1 , R 2 and R 3 are independently selected from the group consisting of H, Cl, Br, I, and C 1 to C 80 hydrocarbon and polymer radicals.
YSe-R x -MO 2 (III)
wherein Y is selected from Sn or Pb; and R x is a carbon allotrope; and M is selected from the group consisting of Zr, Ti, Cr, Mo, W and Mn.