摘要:
A vanillin is found to be a useful starting material for preparing new monomers that can be further applied to make high Tg composite resins that are in turn useful for making composite parts.
摘要:
The present invention relates to an industrially usable process for preparing alkali metal and alkaline earth metal tricyanomethanides in particularly high purity.
摘要:
Malonodinitrile produced from cyanogen halide and acetonitrile and containing fumarodinitrile as an impurity is purified and stabilized by recrystallizing from an aliphatic alcohol or dialkyl ether in the presence of benzonitrile.
摘要:
Present invention relates to a process and an installation (100) for the preparation of hydrogen cyanide by the Andrussow process, and more precisely for improving the conditions of mixing the reactant gases before feeding the Andrussow type reactor (60), in order to improve safety, to avoid any risk of explosion and to produce HCN in safe and efficient manner. The installation is configured in such a manner that oxygen is pre-mixed with air with a ratio comprised between 20.95% and 32.5% by volume, preferably between 25% and 30.5% by volume; methane containing gas and ammonia are simultaneously added in the pre-mixture of oxygen-enriched air in such a manner that the volumic ratio of methane to ammonia is comprised between 1.35 and 1.02 depending on the content of oxygen into air; said obtained reactant gases mixture having a temperature comprised between 80° C. and 120° C., preferably between 95° C. and 115° C. for feeding the Andrussow type reactor (60).
摘要:
What is described is a process for preparing organic compounds of the general formula (I) R—R′ (I) by converting a corresponding compound of the general formula (II) R—X (II) in which X is fluorine, chlorine, bromine or iodine to an organomagnesium compound of the general formula (III) [M+]n[RmMgXkY1] (III) wherein compounds of the formula (III) are reacted with a compound of the general formula (IV) characterized in that the reaction of (III) with (IV) is performed in the presence of a) catalytic amounts of an iron compound, based on the compound of the general formula (II), and optionally in the presence of b) a nitrogen-, oxygen- and/or phosphorus-containing additive in a catalytic or stoichiometric amount, based on the compound of the general formula (II).
摘要翻译:描述的是通过将相应的通式(II)RX(II)的化合物(其中X是氟,氯,溴或溴)或其盐,其中R 1,R 2, 碘与通式(III)的化合物(III)反应的通式(III)的有机镁化合物[M +] n [RmMgXkY1](III)其中式(III)化合物与通式(IV)的化合物反应,其特征在于(III )与(IV)化合物在(a)催化量的铁化合物(基于通式(II)的化合物)存在下进行,任选在b)氮,氧和/或磷 基于通式(II)的化合物,催化剂或化学计量的添加剂。
摘要:
Process for separating alkenes, e.g., butene, from alkadienes, e.g., butadiene by preferentially hydrocyanating the diene and thereafter recovering the unreacted alkenes.
摘要:
A method for converting vanillin to bis(cyanate) ester monomers, comprising treating vanillin with a reductive coupling agent to form at least one olefin. The olefin or olefins are treated with hydrogen and a metal catalyst to hydrogenate said olefin. The hydrogenated olefin or olefins are treated with at least one cyanogen halide and a base in an organic solvent to afford at least one olefin monomer. The olefin monomer or monomers are purified by recrystallization or precipitation from an organic solvent.
摘要:
Present invention relates to a process and an installation (100) for the preparation of hydrogen cyanide by the Andrussow process, and more precisely for improving the conditions of mixing the reactant gases before feeding the Andrussow type reactor (60), in order to improve safety, to avoid any risk of explosion and to produce HCN in safe and efficient manner. The installation is configured in such a manner that oxygen is pre-mixed with air with a ratio comprised between 20.95% and 32.5% by volume, preferably between 25% and 30.5% by volume; methane containing gas and ammonia are simultaneously added in the pre-mixture of oxygen-enriched air in such a manner that the volumic ratio of methane to ammonia is comprised between 1.35 and 1.02 depending on the content of oxygen into air; said obtained reactant gases mixture having a temperature comprised between 80° C. and 120° C., preferably between 95° C. and 115° C. for feeding the Andrussow type reactor (60).
摘要:
Disclosed is process for the preparation of a key Rilpivirine intermediate namely, (E)-4-(2-cyanoethenyl)-2,6-dimethylphenylamine hydrochloride (II) by a process comprising reaction of the tetrafluoroborate salt of the diazonium ion of 2,6-dimethyl-4-amino-1-carboxybenzyl phenylamine (VI) with acrylonitrile in presence of palladium acetate, followed by treatment with an acid and its subsequent conversion to the hydrochloride salt (II), wherein the undesired Z isomer is less than 0.5% and provides Rilpivirine hydrochloride having Z isomer less than 0.1%.
摘要:
The present invention relates to an industrially usable process for preparing alkali metal and alkaline earth metal tricyanomethanides in particularly high purity.