摘要:
The invention relates to an apparatus for continuously carrying out heterogeneously catalyzed chemical reactions, comprising a microwave-transparent tube, the longitudinal axis of which extends in the direction of propagation of the microwaves of a single-mode microwave applicator and which is filled with an open-cell foam that carries or is made of catalytically active species.
摘要:
The invention relates to polymers carrying ester/hydroxyl groups, containing repetitive structural units of formulae (I) and (II) in a block-wise, alternating or statistical sequence, wherein D represents a direct bond between the polymer backbone and the hydroxyl group, a C1-to C6-alkene group, a C5- to C12-arylene group, an oxyalkene group of formula -O-R2-, an ester group of formula -C(O)-O-R2- or an amide group of formula -C(O)-N(R3)R2-, E represents a hydrocarbon group having 1 to 50 C-atoms, R2 represents a C2- to C10-alkene group, R3 represents hydrogen or a C1- to C10-alkyl group, which can carry substituents, k represents a number between 1 and 1000, n represents a number from 0 to 4999, m represents a number from 1 to 5000, and n+m represents a number between 10 to 5000, under the proviso that a) the molar portion of the structural units (I) on the polymer is between 0 and 99.9 mol-%, and b) the molar portion of the structural units (II) on the polymer is between 0.1 and 100 mol-% of the repetitive units. The invention also relates to a method for the production of said polymers using microwaves.
摘要:
The invention relates to a continuous method for producing aliphatic carbonic acid esters by reacting at least one aliphatic carboxylic acid of formula (I) R1-COOH (I), wherein R1 represents hydrogen or an optionally substituted aliphatic hydrocarbon group with 1 to 50 carbon atoms, with at least one alcohol of formula (II) R2-(OH)n (II), wherein R2 represents an optionally substituted hydrocarbon group with 1 to 100 C atoms and n is an integer from 1 to 10, in the presence of at least one transesterification catalyst in a reaction tube the longitudinal axis of which extends in the direction of propagation of the microwaves of a monomode microwave applicator, under microwave irradiation to form the ester.
摘要:
The invention relates to a continuous method for N-acylating amino group-carrying organic acids by reacting at least one carboxylic acid of formula (I) R1-COOH (I), wherein R1 represents hydrogen or an optionally substituted hydrocarbon group with 1 to 50 carbon atoms, with at least one at least one amino group-carrying organic acid of formula (II) R2NH-A-X (II), wherein A represents an optionally substituted hydrocarbon group with 1 to 50 carbon atoms, X represents an acid group or the metal salt thereof and R2 represents hydrogen, an optionally substituted hydrocarbon group with 1 to 50 C atoms or a group of the formula -A-X, wherein A and X independently are defined as above, in a reaction tube the longitudinal axis of which extends in the direction of propagation of the microwaves of a monomode microwave applicator, under microwave irradiation to form amide.
摘要:
The invention relates to polymers comprising ester/hydroxyl groups, containing repetitive structural units of formulae (I) and (II) in blocks, alternatively or statistically in her Abfolge (I), (II) wherein D represents a direct bond between the polymer backbone and the hydroxyl group, a C-1-to C6-alkylene group, a C5- to C12-arylene group, a oxyalkylene group of formula -O-R2-, an ester group of formula -C(O)-O-R2- or an amide group of formula -C(O)-N(R3)R2-, E represents a hydrocarbon group having 1 to 10 C-atoms, R1 represents hydrogen, a hydrocarbon group having 1 to 50 C-atoms or an acyl group of formula -C(O)-R4, R2 represents a C2- to C10-alkylene group, R3 represents hydrogen or a C1- to C10-alkyl group, which can have substituents, R4 represents a hydrocarbon group having 1 to 50 C-atoms, A represents a C2- to C10-alkylene group, k represents a number between 1 and 100, n represents a number from 0 to 4999, m represents a number from 1 to 5000, n+m for a number from 10 to 5000, under the proviso that a) the molar fraction of the structural units (I) on the polymer is between 0 and 99,9 mol-%, and b) the molar fraction of the structural units (II) on the polymers between 0.1 and 100 mol-% of repetitive units. The invention also relates to a method for the production of said polymers by exposing a polymer reaction mixture containing hydroxyl groups and ether carbon esters to microwaves.
摘要:
The invention relates to a method for reacting polymers (A) comprising hydroxyl groups and which have repetitive structural units of general formula (I), wherein D represents a direct bond between the polymer backbone and a hydroxyl group, a C1-to C6-alkene group, a C5- to C12-arylene group, an oxyalkylene group of formula -O-R2-, an ester group of formula -C(O)-O-R2- or an amide group of formula -C(O)-N(R8)R2-, R2 represents a C2- to C10-alkene group, R8 represents hydrogen or an optionally substituted C2- to C10-alkyl group and n represents a number between 3 and 5000, with carboxylic acids B1 ) of formula (II) or carboxylic acid esters B2) of formula (III) R1-COOH (II) R1-COOR7 (III), wherein R1 represents a hydrocarbon group having 2 to 50 C atoms, and R7 represents a C1C4-alkyl group, in which the polymers (A) comprising the hydroxyl groups are exposed to microwaves in the presence of carboxylic acids of formula (II) or carboxylic acid esters of formula (III) and in the presence of water. The reaction mixture is heated to temperatures over 100 °C by microwave rays.
摘要:
The invention relates to a continuous method for producing aromatic carboxylic acid esters by reacting at least one aromatic carboxylic acid of formula (I) Ar-COOH (I), wherein Ar represents an optionally substituted aryl group with 5 to 50 atoms, with at least one alcohol of formula (II) R2-(OH)n (II), wherein R2 represents an optionally substituted hydrocarbon group with 1 to 100 C atoms and n is an integer from 1 to 10, in the presence of at least one transesterification catalyst in a reaction tube, the longitudinal axis of which extends in the direction of propagation of the microwaves of a monomode microwave applicator, under microwave irradiation to form the ester.
摘要:
The invention relates to a device for continuously carrying out chemical reactions. The device comprises a microwave generator, a microwave applicator accommodating a microwave-transparent tube, and an isothermal reaction section which is arranged such that the material to be reacted is guided inside the microwave-transparent tube through a microwave applicator which is used as the heating zone and in which it is heated to reaction temperature by means of microwaves that are emitted from the microwave generator into the microwave applicator. The material to be reacted, which is heated and optionally under pressure, is transferred from the microwave applicator to an isothermal reaction zone once it has left the heating zone, said reaction zone being arranged downstream of the heating zone, and is cooled once it has left the isothermal reaction zone.
摘要:
Additives for improving the flowability of mineral oils, containing A) 1 -40 wt. % of at least one copolymer, which is oil-soluble and improves the cold flow properties of mineral oil, B) 20 - 80 wt. % of at least one poly- alpha -olefin with a molecular weight of 250 -5000, derived from monoolefins with 3 - 5 C atoms, and C) 5 - 70 wt. % of at least one organic acid selected from C1) alkylphenol-aldehyde resins and C2) aliphatic and/or aromatic sulfonic acids.
摘要:
The present invention relates to cooling additives for middle distillates, containing A) at least one polyester of formula (A1) wherein one of the radicals R1 to R4 represents a linear C16-C40 alkyl or alkenyl radical and the remainder of the radicals R1 to R4 represent, independently of one another, hydrogen or an alkyl radical having 1 to 3 C atoms, R5 is a C-C bond or an alkylene radical having 1 to 6 C atoms, R16 is a hydrocarbon group having 2 to 10 carbon atoms, n is an integer from 1 to 100, m is an integer from 3 to 250, p is 0 or 1, and q is 0 or 1, B) at least one copolymer of ethylene and of at least one ethylenically unsaturated ester, the copolymer having a melt viscosity, measured at 140 °C, of at most 5000 mPas, and C) at least one organic solvent.