Abstract:
PROBLEM TO BE SOLVED: To enable to industrially simply and profitably obtain the subject compound from a primary amine and a diol by using a specific copper- containing hydrogenation/dehydrogenation catalyst. SOLUTION: This method for producing an N-substituted cyclic amine of formula I comprises reacting (C) a compound of the formula: R -NH2 [R is an (alkoxy)alkyl, an aryl, etc.,] with (D) a compound of the formula: HO-A-OH A is an alkylene (substituted by a group of the formula: R (R is R ), a group of the formula: (CH2 )n -[O-(CH )m ]r , [(m), (n) are each 2-8; (r) is 1-3]} in the presence of a coppercontaining catalyst. The copper-containing catalyst is obtained by impregnating an inactive carrier (e.g. silicon dioxide, a silicate or zeolite) with (A) hydrogen and (B) the aqueous ammine complex solution of an easily pyrolytic copper compound (e.g. copper carbonate, copper oxalate or copper formate)(preferably an ammoniacal copper carbonate solution), drying the impregnated carrier, and subsequently calcining the dried product, and contains the copper in an amount of 5-50wt.% converted into CuO on the basis of the whole amount of the calcined catalyst.
Abstract:
The prodn. of isocyanurate gp.-contg. polyisocyanates (A) comprises partial trimerisation of (cyclo)aliphatic di-isocyanates (B) in the presence of tetra-alkylammonium alkyl carbonates of formula (I) and/or quat. ammonio-alkyl carbonate betaines of formula (II) as catalyst(s), followed by deactivation of the catalyst on reaching the required deg. of trimerisation. In formulae, R , R , R = 1-20 C alkyl, 5-6C cycloalkyl, 7-10C aralkyl or Ph; or R + R can form a 5- or 6-membered cycloalkyl gp., or R + R + N can form a 5- or 6-membered ring with another N or O as bridging gp. or R + R + R + N can form a multi-membered ring with one or more extra N and/or O bridges; R = 1-4C alkyl; R = 2-20 C alkylene, 5-6C cycloalkylene, 7-10C aralkylene or phenylene; or R + R = alkylene gp. which forms a 5- to 7-membered ring with a N bridge. Pref. trimerisation catalysts are carbonates of formula (III), (IV), or (V), or betaine carbonates of formula (V), (VII) or (VIII). Trimerisation is carried out at 30-150 degrees C and the catalyst is deactivated with dibutyl phosphate (DBP); unreacted monomeric di-isocyanate is then removed. Pref. di-isocyanates are (cyclo)aliphatic di-isocyanates obtd. by a phosgene-free process, esp. by thermal cleavage of (cyclo)aliphatic dicarbamate esters; esp. pref. di-isocyanates obtd. by this method are 1,6-hexamethylenedi-isocyanate (HDI), 2-butyl-2-ethyl-pentamethylene-1,5-di-isocyanate and 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethylcyclohexane (IPDI).
Abstract:
Polytetrahydrofuran (PTHF) or copolymers or di- or mono- esters thereof, are produced by polymerization of THF in presence of telogen(s) and/or comonomer(s) on acid-activated calcium montmorillonite catalysts with a BET surface of \- 300 m /g, an acidity of \- 0.02 mmol/g at a pKs /g for pore sizes of 30-200 Angstrom .
Abstract:
Hectorite is used as the heterogeneous catalyst in a process for the production of poly-tetrahydro- furan (PTHF), PTHF copolymers and di- or mono-esters of these polymers by polymerisation of THF in presence of telogen(s) and/or comonomer(s).
Abstract:
N-(2-Hydroxyethyl)piperazine of the formula I is prepared by reaction of triethanolamine of the formula II with ammonia in the presence of hydrogen at temperatures from 100 to 500 DEG C and pressures from 10 to 500 bar on heterogeneous catalysts, employing heterogeneous catalysts having an active mass containing 20 to 85% by weight of ZrO2 and/or Al2O3, 1 to 30% by weight of oxygen-containing compounds of copper, calculated as CuO, 1 to 60% by weight of oxygen-containing compounds of cobalt calculated as CoO and/or oxygen-containing compounds of nickel, calculated as NiO and/or oxygen-containing compounds of molybdenum, calculated as MoO3.
Abstract:
The invention relates to a method for producing polytetrahydrofuran and polytetrahydrofuran copolymers, diesters or monoesters thereof by polymerising tetrahydrofuran in the presence of at least one telogen and/or comonomer on acid- activated montmorillonite catalysts, whereby the ratio of the montmorillonite structure to the sum of the muscovite and kaolin structure in the montmorillonite catalyst, which is determined from the intensities of the reflexes measured at 5.5 DEG 2È for montmorillonite, 9.0 DEG 2È for muscovite and 12,5 DEG 2È for kaolin is, after acid activation, at least 5:1.
Abstract:
Supported catalysts (I) suitable for ammonoxidation comprise: (a) an (almost) spherical support of Al2O3, SiO2, TiO2 and/or ZrO2 with a bulk density of 0.6-1.6 kg/l; and (b) an active compsn. contg. V and Sb in oxide form. Also claimed are methods for making (I) and for producing (hetero)aromatic (poly)nitriles (II).
Abstract:
Production of aromatic polyamine mixtures contg. cpds. of formula: H2NACH2BNH2(I) (where, A and B = 1,4-phenylene residues which can have 1-4 substits. chosen from 1-20C alkyls and halogens) comprises converting a cpd. of formula: HANHCH2NHBH (IV) and/or a cpd. of formula HANHCH2BNH2 (V) (where, A and B = as above) at a temp. of 20-200 deg C in the presence of a heterogeneous inorganic catalyst chosen from: (a) oxides of 3-10 group element which can be acid-activated; (b) a clay doped with an oxide of a 2-13 group element or lanthanide which an be acid-activated; and (c) opt. acid-activated layered silicates acidity of below pK3 = 0.5 of more than 0.05 mmol/g catalyst.
Abstract:
The invention relates to a method for polymerizing cyclic ether on a heterogeneous catalyst, wherein the heterogeneous catalyst contains one or several pillared interlayered clays (PILCs).