摘要:
A process for the preparation of glutaric dialdehyde by the reaction of alkoxy dihydropyrans of the general formula I ##STR1## in which R stands for C.sub.1 to C.sub.20 alkoxy, with water at temperatures ranging from 0.degree. to 150.degree. C. and pressures of from 0.01 to 50 bar in the presence of a which microporous, crystalline aluminum silicate catalyst, e.g. a beta-type zeolite or pentasil catalyst having a pore diameter greater than 5.4 .ANG..
摘要:
Halides are removed from halide-containing nitrile mixtures by(a) thermally treating the halide-containing nitrile mixture,(b) subsequently adding a base to the thermally treated nitrile mixture and(c) subsequently separating off the base from the nitrile mixture.Amines are prepared by(A) reacting alkyl halides with metal cyanides in an at least two-phase reaction medium in the presence of halide-containing phase-transfer catalysts to give alkanenitriles,(B) separating off the resulting halide-containing alkanenitrile mixture phase and(C) further treating the halide-containing alkanenitrile mixture phase, as described in the stages(a)-(c) removing halides from halide-containing nitrile mixtures and(d) hydrogenating nitrites obtained in stage (c) to give amines, in the presence of suspended or fixed-bed catalysts.
摘要:
In a process for preparing alkylamines by reacting amines and aliphatic aldehydes in the presence of free hydrogen on a fixed bed catalyst in a reactor in which amines and aldehydes are mixed in the catalyst bed after being fed in in separate streams, only the aldehyde stream or only the amine stream is preheated during the feeding in.
摘要:
A process for preparing glutaraldehyde by reaction of alkoxydihydropyrans of the general formula I ##STR1## where R is C.sub.1 -C.sub.20 -alkoxy, with water at from 0.degree. to 150.degree. C. and from 0.01 to 50 bar in the presence of a catalyst consisting essentially of a bleaching earth.
摘要:
In the process for preparing N-ethyldiisopropylamine by reacting acetaldehyde with diisopropylamine and hydrogen at elevated temperature and under pressure in the presence of a hydrogenation catalyst, the catalyst comprises an oxidic support material selected from the group consisting of zirconium dioxide, titanium dioxide, aluminum oxide, silicon dioxide, zinc oxide, magnesium oxide, cerium dioxide, clays and zeolites or mixtures thereof.
摘要:
A process for preparing &bgr;-alkoxynitriles by reacting &agr;,&bgr;-unsaturated nitriles with monohydric, dihydric or trihydric alcohols in the presence of basic catalysts at from −20 to +200° C. comprises using a diazabicycloalkene catalyst of the formula I where from 1 to 4 hydrogen atoms may be independently replaced by the radicals R1 to R4, in which case R1, R2, R3, R4 are each C1-20-alkyl, C6-20-aryl or C7-20-arylalkyl, and n and m are each an integer from 1 to 6.
摘要:
A process for preparing an amine by catalytic reaction of an olefin with ammonia or a primary or secondary amine by contacting a mixture of the reactants in a reactor at 200.degree. to 400.degree. C. and an elevated pressure up to 700 bar in the presence of a catalyst consisting essentially of an X-ray amorphous (non-crystalline) mesoporous catalyst, some of which may have a microporous non-crystalline content. The catalyst has the composition a MO.sub.2 * b Q.sub.2 O.sub.3 * c P.sub.2 O.sub.5 where Q is at least one of the trivalent elements aluminum, boron, chromium, iron or gallium, and M is at least one of the tetravalent elements silicon, titanium or germanium. The molar ratio of a:b is from 0.5:1 to 1000:1 and the molar ratio of c:b is from 0 to 2:1. As prepared and used in the process, this non-crystalline catalyst has a specific BET surface area of from 200 to 1000 m.sup.2 /g.
摘要翻译:通过使烯烃与氨或伯胺或仲胺进行催化反应来制备胺的方法,该方法是将反应物的混合物在200-400℃的反应器和高达700巴的升高的压力下反应, 主要由X射线无定形(非结晶)介孔催化剂组成的催化剂,其中一些可能具有微孔非晶体含量。 催化剂具有以下组成:MO2 * b Q2O3 * c P2O5其中Q是三价元素铝,硼,铬,铁或镓中的至少一种,M是四价元素硅,钛或锗中的至少一种。 a:b的摩尔比为0.5:1-1000:1,c:b的摩尔比为0-2:1。 在该方法中制备和使用时,该非结晶催化剂的BET比表面积为200-1000m2 / g。
摘要:
In a process for preparing diamines from aminoalcohols and nitrogen compounds selected from the group consisting of ammonia and primary and secondary amines at from 80.degree. to 250.degree. C. and pressures of from 1 to 400 bar using hydrogen in the presence of a zirconium, copper, nickel catalyst, the catalytically active composition comprises from 20 to 85% by weight of oxygen-containing zirconium compounds, calculated as ZrO.sub.2, from 1 to 30% by weight of oxygen-containing compounds of copper, calculated as CuO, from 30 to 70% by weight of oxygen-containing compounds of nickel, calculated as NiO, from 0.1 to 5% by weight of oxygen-containing compounds of molybdenum, calculated as MoO.sub.3, and from 0 to 10% by weight of oxygen-containing compounds of aluminum and/or manganese, calculated as Al.sub.2 O.sub.3 and MnO.sub.2 respectively.
摘要:
N-Substituted cyclic amines are prepared by reacting diols with primary amines over a copper-containing catalyst which is obtainable by impregnation of an inert support with an aqueous solution of an ammine complex of a readily thermally decomposable copper compound and subsequent drying and calcination and contains from 5 to 50% by weight of copper, calculated as CuO.
摘要:
Fuels for gasoline engines contain small amounts of polyetheramines IR.sup.1 --(OBu).sub.n --NR.sup.2 R.sup.3 (I)whereR.sup.1 is C.sub.2 -C.sub.30 -alkyl,R.sup.2 and R.sup.3, independently of one another, are each hydrogen, C.sub.1 -C.sub.8 -alkyl, aminoalkylene of the general formula II--R.sup.4 --NR.sup.5 R.sup.6 (II)or polyaminoalkylene of the general formula III--(R.sup.4 --NR.sup.5).sub.m --R.sup.6 (III)whereR.sup.4 is C.sub.2 -C.sub.10 -alkylene, R.sup.5 and R.sup.6, independently of one another, are each hydrogen or C.sub.1 -C.sub.8 -alkyl and m is from 2 to 8,Bu is a butylene radical derived from butylene oxide andn is from 12 to 28.