摘要:
An alkali metal cyanate is prepared by heating a heterogeneous mixture of urea and an alkali metal carbonate in a solvent which selectively dissolves urea, but not the alkali metal carbonate.
摘要:
The present invention is directed to a method of preparing an inorganic-alkali metal salt of the formula:ZYwherein Z is an alkali metal selected from the group consisting of lithium and sodium, and wherein Y is an inorganic radical selected from the group consisting of SCN, CN, CNS, OCN, Br, I, Cl, NO.sub.2, NO.sub.3, ClO.sub.4, ReO.sub.4, and CF.sub.3 SO.sub.3. The method involves the reaction of a nitrogen-containing compound of the formula:QHYwherein Q is selected from the group consisting of specified nitrogen-containing groups, and wherein H is hydrogen and Y is as defined above, with an alkali metal compound of the formula:ZXwherein Z is defined above and wherein X is selected from the group consisting of hydrogen, specified nitrogen-containing radicals, and specified organic radicals. The reaction is carried out in ether solvent. In a preferred embodiment, Q is NH.sub.3 and X is hydrogen.
摘要:
Processes are disclosed for providing in situ generated cyanic acid and simultaneously preparing certain carboxamides which have a tertiary aliphatic substituted ammonium or pyridinium group substituted on the alpha carbon atom.
摘要:
THE YIELD OF CYANURIC CHLORIDE IS INCREASED AND THE LIFE OF AN ACTIVATED CHARCOAL CATALYST USED IN PREPARING CYANURIC CHLORIDE BY CONTACT OF CYANOGEN AND CHLORINE IN THE GAS PHASE AT A TEMPERATURE OF FROM ABOUT 350*C. TO ABOUT 750*C. IS CONSIDERABLY LENGTHENED BY PRETREATMENT OF THE ACTIVATED CHARCOAL CATALYST FOR REMOVAL THEREFROM OF METAL COMPOUNDS, PREFERABLY WITH A METALSOLUBILIZING ACID SUCH AS AQUEOUS HYDROCHLORIC ACID, FORMIC ACID, ACETIC ACID OR DILUTE NITRIC ACID.
摘要:
Basic zinc cyanurate fine particles are produced by subjecting a mixed slurry to wet dispersion using a dispersion medium at a temperature in the range of 5 to 55° C., the mixed slurry being formed by blending water, cyanuric acid, and at least one component selected from zinc oxide and basic zinc carbonate such that the cyanuric acid concentration is 0.1 to 10.0 mass % with respect to water.
摘要:
Carbonyl cyanide may be prepared by reacting a solution of a trihalomethyl haloformate in an organic solvent with a cyanide salt in the presence of a phase transfer catalyst. Carbonyl cyanide may be prepared by this method in good yield and with great convenience.
摘要:
A process for the manufacture of isocyanic acid by catalytic oxidation of hydrogen cyanide gas utilizing a silver catalyst doped with palladium and a novel metallic silver catalyst in the form of silver crystals having a palladium coating.
摘要:
Removing water from wet isocyanic acid in organic solution of said isocyanic acid by addition hereto of a hydrogen halide or a compound which forms hydrogen halide in said solution in amount sufficient to provide a molar excess of hydrogen halide in said solution relative to the water, and ammonia if any, present in said solution.
摘要:
The present invention relates to a LASER RANGE FINDER, and more particularly, to a LASER RANGE FINDER which includes a first laser transmitting unit and a second laser transmitting unit transmitting a laser in different directions and controls angles of a first module and a second module including the first laser transmitting unit and the second laser transmitting unit, respectively to effectively measure a distance between a first specific object and a second specific object and further, easily measure the length of a specific object.
摘要:
A process for the air oxidation of hydrogen cyanide to isocyanic acid in the presence of a solid catalyst utilizing adiabatic conditions and controlling temperatures by the proportion of inert gas.