Abstract:
The object of the invention is metal carbamates of the general formula (I), where R 1 and R 2 are equal or different, and are an alkyl group with 1-18 carbon atoms and where M is an alkali metal atom.
Abstract:
The object of the invention is metal carbamates of the general formula (I), where R 1 and R 2 are equal or different, and are an alkyl group with 1-18 carbon atoms and where M is an alkali metal atom.
Abstract:
Distillation of water, 1- and 2 butene and 1,3 butadiene containing a stabilizer in a distillation device K4 to obtain a stream 15 as a bottom product, containing dried 1,3-butadiene, 1- und 2-butene and the stabilizer, and a stream 16 as the top product, containing an azeotropic 1,3-butadiene/water mixture, condensation of the stream 16 in a condenser W, transfer of the obtained condensate (stream 17) in a phase separation device, recycling of the upper liquid phase (stream 18) consisting of 1,3-butadiene as a return flow to column K4 and removal of the lower aqueous phase (stream 19), (a) reaction of stream 15 in a reactor R1 with hydrogen cyanide on at least one catalyst (stream 6a) to obtain stream 1, containing 3-pentenenitrile, 2-methyle-3-butenenitrile, the at least one catalyst, unreacted 1,3-butadiene, 1- and 2-butene and optionally any remaining unreacted hydrogen cyanide, (b) distillation of stream 1 in a distillation device K1 to obtain a stream 2 as a top product, containing the majority of the 1,3-butadiene from stream 1 and to obtain a stream 3 as a bottom product, containing 3- pentenenitrile, the at least one catalyst, 2-methyl 3-butenenitrile, 1- and 2-butene and the remainder of the 1,3 butadiene from stream 1 that was not separated in stream 2, c) distillation of the stream 3 in a distillation device K2 to obtain a stream 5 in a side-tap of the column, said stream containing 3- pentenenitrile and 2-methyl-3-butenenitrile, a stream 6 as bottom product, containing the at least one catalyst and a stream 4 as a top product, d) compression of stream 4 in the compressor V1, separation of a gaseous partial stream 4b containing 1-and 2-butene, transfer of the compressed stream 4a to the condenser W1, common condensation with stream 2 from b) and transfer of the condensate as stream 9, partially as a return flow to column K1 (stream 9b), partially as areturn stream in the reactor R1 (stream 9a) and e) separation of stream 5 by distillation to obtain 3- pentenenitrile and 2-methyl-3-butenenitrile.
Abstract:
Process for producing nickel(0)-phosphorus ligand complexes containing at least one nickel(0) central atom and at least one phosphorus-containing ligand, by reacting a nickel(II) compound with a reducing agent in the presence of the ligand to give a reaction mixture, characterized in that, a) in the reaction the molar ratio of reducing agent:nickel(II) compound is 1:1 to 1000:1, calculated as molar ratio of redox equivalents, b) in the reaction the molar ratio of phosphorus-containing ligand:nickel(II) compound is at most 30:1, calculated as molar ratio of P atoms:Ni atoms, c) in the resultant reaction mixture the nickel(0) content is at most 1.3% by weight, and d) the resultant reaction mixture is extracted by adding at least one dinitrile and at least one hydrocarbon, at least two immiscible phases forming.
Abstract:
Method for producing urethanes through reaction of aromatic diamines with a dialkyl carbonate, characterized in that the alkyl group of the organic dialkyl carbonate has 2-18 carbon atoms and one or more heteroatoms and the reaction is carried out in the presence of a catalyst.
Abstract:
The invention relates to a method for extractive separation of nickel (0) complexes with phosphorous ligands, from a reaction product of a hydrocyanation of unsaturated mononitriles to give dinitriles, by means of extraction with a hydrocarbon, wherein a phase separation of the hydrocarbon and the nitrile-containing solution into two phases occurs, by addition of a polar additive to the reaction product (feed stream) and/or the extraction stage.
Abstract:
The invention relates to a method for producing compounds of general formula XPR2(OR1) (Ia), wherein X represents chlorine, bromine or iodine and R1 represents an organic radical, by reacting compounds of general formula X2PR2 (II), wherein X has the above-mentioned meaning and R2 represents an organic radical, with compounds of general formula R1OH (III), wherein R1 has the above-mentioned meaning, to form a mixture IV, wherein a) the secondary reaction is carried out at a temperature of between 50 to 240°C and at a pressure of 0,001 to 0,9 bar, b) from the mixture IV, the compounds (Ia) are separated from the compounds PR2(OR1)2 (Ib) and optionally from the compounds II and c) compounds (Ib) and optionally non-reacted compounds II are guided back to the synthesis step.
Abstract:
The object of the invention is a method for producing urethanes through reaction of aromatic amines with a dialkyl carbonate, characterized in that the alkyl radical of the organic dialkyl carbonate has 2-18 carbon atoms and the reaction is carried out in the presence of a base.