摘要:
A ferruginous catalyst for decreasing the content of nitrogen oxide in flue gases. The catalyst comprising an active constituent in the form of a combination of a compound of iron and of an acid aluminosilicate that has a layered structure.
摘要:
A catalyst for the production of synthesis gas or hydrogen from aqueous methanol by dissociation or steam reforming. The catalyst contains:(A) a noble metal component of one or more elements of the Group VIII of the Periodic Table on an oxide carrier which comprises(B.sub.1) TiO.sub.2 and/or CeO.sub.2, singly or in admixture with other thermo-resistant metal oxides and/or binders or(B.sub.2) TiO.sub.2 and/or CeO.sub.2 on the surface of a preformed, thermo-resistant carrier and(B.sub.3) ZrO.sub.2 or La.sub.2 O.sub.3 in weight concentrations of about 1 to 20% by weight.The concentration of hydrogen or of carbon monoxide may be controlled by monitoring the concentration of steam utilized in the inlet feed.
摘要:
A catalyst for decreasing the content of nitrogen oxides in flue gases. The catalyst contains at least one of the metals titanium, zirconium, vanadium, tungsten, molybdenum, or cerium in the form of one or more of their oxides combined with a silicate with a three-layer structure (three-layer silicate) which is or comprises talc. The three-layer silicate is preferably acid-activated while essentially retaining its crystalline layer structure and being not yet X-ray amorphous. The acid activation increases the BET surface area at least 15% and preferably at least 50% in terms of the BET surface area of the talc before acid activation. The atomic ratio of the silicon in the talc to the metal in the oxide is from 0.2 and 50 and preferably from 0.4 to 25.
摘要:
The present invention provides a process for the preparation of an antacid material based upon magnesium aluminium hydroxide, wherein magnesium hydroxide and/or magnesium oxide is reacted in an atomic ratio of magnesium to aluminium of 1:1 to 3:1 with an aqueous solution of aluminium sulphate until the pH of the reaction mixture is from 4.0 to 8.0, whereafter water-soluble components are removed from the mixture in a known manner and the mixture is isolated and, if desired, dried or preferably the mixture obtained after centrifuging or filtering off is used without further purification and optionally dried.The present invention also provides pharmaceutical compositions containing an antacid material prepared by these processes, in admixture with a conventional pharmaceutical adjuvant.Furthermore, the present invention provides a method of combating hyperacidity and gastrointestinal diseases, which comprises administering an antacid material prepared by the above processes.
摘要:
A process for the production of olefins from synthesis gas comprises a first synthesis stage in which a mixture of methanol and higher alcohols are formed from a synthesis gas comprising hydrogen and carbon monoxide. The catalyst for the first synthesis stage comprises the oxides of copper and zinc in intimate association with each other and a promoting compound selected from the group consisting of chromium, cerium, lanthanum, manganese, thorium, and an alkali metal. The materials from the first synthesis stage are separated into a gas phase and a liquid phase. Thereafter the methanol is separated from the higher alcohol fractions. The higher alcohols are then subjected to dehydration in a dehydration stage which comprises passing the higher alcohol fraction over an alkalized dehydration catalyst at a pressure in the range of 0.5-1 bar and a temperature in the range of 350.degree.-500.degree. C. Thereafter the olefins produced by the dehydration of the higher alcohols are separated into the olefinic and non-olefinic materials. Preferred dehydration catalysts include alkalized aluminum oxide and alkalized calcium phosphate.
摘要:
The present invention teaches a method for applying an anti-reflection coating to solar cells whereby the coating is interdispersed among the cell's electrodes on the cell's junction surface. The method includes coating the solar cell's surface with an anti-reflection layer, selectively etching a pattern through the anti-reflection layer, which corresponds to the desired electrode pattern and electrolessly plating a layer of nickel onto the cell's surface.
摘要:
A bonus award system for an automatic phonograph offers bonus pricing during bonus time intervals. Optionally operable means are provided for initiating bonus intervals in the absence or presence of record plays during random time intervals, which are determined in part by phonograph customer activity.
摘要:
A boring device is disclosed wherein a boring bit is rotated as it is advanced and supplied with water through a hollow interior to facilitate the boring operation. A rotary connection introduces water into the hollow boring bit and its support means from one side thereof through an apertured sphere secured to and revolving with the support means.
摘要:
A diplexer for a reflector antenna includes a common circular signal waveguide to transmit and receive signals. The signal waveguide includes first and second ends with a common port provided at the first end. A waveguide arrangement is disposed coaxially relative to the signal waveguide in the region of the second end of the signal waveguide. A cylindrical coupler section is disposed between the first and second ends of the signal waveguide, and connects the waveguide arrangement to the common signal waveguide. In order to create a first and second coaxial waveguide port, the waveguide arrangement includes a first circular waveguide, an inner conductor is disposed inside, in which a first signal can propagate when the diplexer is operating, and a second circular waveguide, surrounding the first waveguide, in which a second signal can propagate at a lower frequency than the first signal when the diplexer is operating.