Abstract:
The invention relates to a method for continuously producing nitrobenzene by nitriding benzene using a mixture of nitric acid and sulfuric acid under adiabatic conditions, wherein unreacted benzene is separated out of the raw product obtained after phase separation and prior to washing same, using the adiabatic reaction heat.
Abstract:
The invention provides a process for producing a variety renewable aromatic compounds such as benzene, toluene, xylenes, and cumene, as well as compounds derived from these including, for example, aniline, benzoic acid, cresol, cyclohexane, cyclohexanone, phenol and bisphenol A, toluene di-isocyanate, isophthalic acid, phthalic anhydride, terephthalic acid and dimethyl terephthalate. The invention also provides for renewable forms of these aromatic compounds.
Abstract:
Aromatic compounds such as o-xylene are selectively nitrated by nitric acid in the presence of polyphosphoric acid and a large pore, acidic zeolite or a large pore, hydrophobic molecular sieve. This is an environmentally friendly, commercially viable, high conversion process for the selective nitration of aromatic compounds in the para position.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung einer mononitrierten organischen Verbindung, insbesondere ein Verfahren zur Herstellung von Mononitrobenzol. Die Erfindung betrifft insbesondere ein verbessertes kontinuierliches adiabatisches Verfahren zur Herstellung von Nitrobenzol.
Abstract:
The present invention relates to a novel process for producing quinazoline compounds which are useful in therapy. More specifically, the compounds produced by the process of the invention are useful in the treatment of a number of cardiovascular diseases. The process of the invention provides 6,7-dichloro-1,5- dihydroimidazo [2,1 -b] quinazolin 2 (3H)-one, more commonly known as anagrelide and its analogues in a clean and efficient manner.
Abstract:
The present invention relates to a process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates by sequential reaction of benzene to nitrobenzene to aniline to polyphenyl polymethylene polyamines to polyphenyl polymethylene polyisocyanates wherein the benzene used as the starting material contains 500 to 5000 ppm w/w toluene and/or xylenes.
Abstract translation:本发明涉及一种二苯基甲烷二异氰酸酯与多苯基多亚甲基多异氰酸酯的混合物的制备方法,其中苯与硝基苯依次反应为苯胺至聚苯基多亚甲基多胺至聚苯基多亚甲基多异氰酸酯,其中用作原料的苯含有500至5000ppmw / w 甲苯和/或二甲苯。
Abstract:
A method for making an energetic material is described, and which includes the steps of providing a source of aqueous nitric acid having a concentration of less than about 95% by weight; mixing a surfactant with the source of the aqueous nitric acid so as to dehydrate the aqueous nitric acid to produce a source of nitronium ions; providing a carbon dioxide environment; providing a source of an organic material to be nitrated to the carbon dioxide environment; and controllably mixing the source of nitronium ions with the carbon dioxide environment to nitrate the organic material and produce a resulting energetic material.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Betamimetika der Formel (1), worin n 1 oder 2; R 1 Wasserstoff, Halogen, C 1-4 -Alkyl oder O-C 1-4 -Alkyl; R 2 Wasserstoff, Halogen, C 1-4 -Alkyl oder O-C 1-4 -Alkyl; R 3 Wasserstoff, C 1-4 -Alkyl, OH, Halogen, O-C 1-4 -Alkyl, O-C 1-4 -Alkylen-COOH, O-C 1-4 -Alkylen-COO-C 1-4 -Alkyl; bedeuten.
Abstract:
A process for producing a quinazolin−4−one derivative represented by the following formula (2): (2) (wherein R 1 , R 2 , R 3 , and R 4 each represents a group not participating in the reaction and R 1 , R 2 , R 3 , and R 4 may be bonded to each other to form a ring) which comprises reacting an anthranilic acid derivative represented by the following formula (1): (1) (wherein R 5 represents hydrogen or a hydrocarbon group) with a formic acid derivative in the presence of an ammonium carboxylate.
Abstract:
A method of preparing nitroform (trinitromethane) by nitrating a starting material which is dissolved or suspended in sulphuric acid. A nitrating agent consisting of nitric acid, nitrate salts or nitrogen pentoxide is added to the sulphuric acid solution/suspension at a temperature from -10°C to +80°C. The starting material is selected from a group consisting of a) a gem-dinitroacetyl urea with the general formula wherein Y is H or a group, wherein Y is an alkoxy or amino group, and salts thereof; b) gem-dinitroacetyl guanidine, and c) 4,6-hydroxypyrimidine. In nitration, a gem-trinitro compound is formed which in hydrolysis splits off nitroform.