Abstract:
PROBLEM TO BE SOLVED: To provide a process for hydrogenating an aromatic compound, enabling to perfectly hydrogenate the aromatic compound in a high yield. SOLUTION: This process for hydrogenating an aromatic compound in which a least one hydroxyl group is bonded to an aromatic ring or an aromatic compound in which at least one amino group is bonded to an aromatic ring, in the presence of a catalyst comprising, as catalytically active component, at least one metal of transition group I, VII or VIII of the periodic table applied to a support, wherein the catalyst is obtainable by (a) dissolving the catalytically active compound or a precursor compound thereof in a solvent, (b) admixing the solution thus obtained with an organic polymer which is able to bind at least ten times its own weight of water, giving a swollen polymer, (c) subsequently mixing the swollen polymer with a catalyst support material and (d) shaping, drying and calcining the composition obtained in this way.
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject compound by reaction between an α,β-unsaturated nitrile and an alcohol using a specific diazabicycloalkene as basic catalyst without the need of any prior separation or neutralization of the catalyst for the addition reaction. SOLUTION: This compound is obtained by reaction between an α,β-unsaturated nitrile (e.g. acrylonitrile) and a monohydric, dihydric or trihydric alcohol (e.g. methanol, ethanol, 2-ethylhexanol, 2-methoxyethanol, benzyl alcohol) at -20 to 200°C using a diazabicycloalkene of the formula (H may be substituted with a 1-20C alkyl, 6-20C aryl or 7-20C arylalkyl; (n) and (m) are each 1-6) as basic catalyst {e.g. 1,5-diazabicyclo[4.3.0]nonene-5(DBN), 1,8- diazabicyclo[5.4.0]undecene-7(DBU)}; wherein the amount of the catalyst to be used is pref. 0.05-5 wt.% based on the alcohol. COPYRIGHT: (C)1999,JPO
Abstract:
PROBLEM TO BE SOLVED: To economically and continuously obtain an alkylamine in a simplified apparatus by preheating only an amine stream or only an aldehyde stream fed by separated stream during feed and reacting the amine with the aldehyde on a fixed bed catalyst in a reactor. SOLUTION: Only an aldehyde stream [e.g. formaldehyde aqueous solution having 50-90 wt.%, preferably 65-75 wt.% water content based on total weight of the solution] or only an amine stream (preferably 30-80 wt.% piperazine aqueous solution) fed by separated stream is preheated during a feed (a molar ratio of piperazine to formaldehyde is 1:1.0 to 1:5, preferably 1:2 to 1:2.7) is and the aldehyde is reacted with the amine in a reactor in which these compounds are mixed in a catalyst bed on a fixed bed catalyst in the presence of an isolated hydrogen to continuously provide the objective alkylamine.
Abstract:
PROBLEM TO BE SOLVED: To industrially and economically advantageously N-alkylate an amine by carrying out the reaction in the presence of a specific catalyst. SOLUTION: When (A) an alcohol (preferably an α,ω-diol) is reacted with (B) an alkylamine or a dialkylamine (preferably monomethylamine, etc.), the reaction is carried out in the presence of (C) a catalyst prepared by including 0-2 wt.% BaO, Cr2 O3 and/or ZnO in copper and magnesium silicate as a base regardless thereof for each time as the catalyst. The component C preferably contains 30-60 wt.% CuO and has preferably at least 100 m /g BET specific surface area. The reaction is preferably conducted in the liquid phase under 50-300 bars pressure.
Abstract:
Verfahren zur Umsetzung einer organischen Verbindung in Gegenwart eines Katalysators, der als Aktivmetall Ruthenium alleine oder zusammen mit mindestens einem Metall der I., VII. oder VIII. Nebengruppe des Periodensystems in einer Menge von 0,01 bis 30 Gew.-%, bezogen auf das Gesamtgewicht des Katalysators, aufgebracht auf einem Träger, umfaßt, dadurch gekennzeichnet, daß 10 bis 50% des Porenvolumens des Trägers von Makroporen mit einem Porendurchmesser im Bereich von 50 nm bis 10.000 nm und 50 bis 90% des Porenvolumens des Trägers von Mesoporen mit einem Porendurchmesser im Bereich von 2 bis 50 nm gebildet werden, wobei sich die Summe der Porenvolumina zu 100% addiert, sowie den Katalysator an sich.
Abstract:
The prodn. of polyurethane (PU) foam comprises reacting (a) polyisocyanate(s); with (b) high-mol. wt. polyol(s) with at least two reactive H atoms, comprising (B1) polyoxyalkylene-polyol(s) with an OH no. of 30-500, obtd. by alkoxylating N,N'-bis(3-aminopropyl)-ethylenediamine, tripropylene-tetramine and/or tetrapropylene-pentamine with alkene oxide(s); and opt. (c) low-mol wt. chain extenders and/or crosslinkers; in the presence of (d) blowing agents. Also claimed are polyols (b1) obtd. as above.
Abstract:
Cpds. of formula (I): (where R1 is lower alkyl; R2 is H or lower alkyl; and R3 is H or acyl) have valuable pharmaceutical (e.g., cardiovascular and antiphlogistic) props. They are prepd. by cyclising a cpd. of formula (II) with R2NHNH2 and opt. exchanging a halogen atom present in an acyl gp. R3 for an amino gp. so as to give a cpd. in which R3 is aminoacyl. Prodts. in which R3 is H may be N-acylated to give prodts. in which R3 is acyl.
Abstract:
Hydrogenation of an aromatic ring containing at least one OH or amino group in the presence of a catalyst comprising at least one group I, VII or VIII metal and a carrier is characterised in that the catalyst is prepared by: (a) dissolving the active component of the catalyst or its precursor in a solvent; (b) treating the solution with an organic polymer that in situ binds at least 10 times its weight in water to give a swollen polymer; (c) mixing the polymer with the catalyst support material; and (d) shaping the mass, drying and calcining.
Abstract:
A new catalyst (I) contains 0.01-30 wt% ruthenium or palladium as active metal, optionally together with Group I, VII or VIII transition metal(s), on a carrier (II) in which (novel feature) 10-50% of the pore volume consists of macropores with a pore diameter (PD) of 50-10,000 nm and 50-90% consists of mesopores with a PD of 2-50 nm. Also claimed are (i) a process for conversion of polymers containing multiple C-C bond(s) in presence of (I) and (ii) a process for conversion of organic compounds in the presence of (I) in which the active metal is ruthenium.