Abstract:
The invention relates to a continuous method for producing esters, in which at least one polyol ester of formula (I) (R1—COO)mR2 (I), where R1 represents hydrogen or an optionally substituted hydrocarbon group containing 1 to 50 carbon atoms, R2 represents an optionally substituted hydrocarbon group containing 2 to 10 carbon atoms, and m represents a number from 2 to 10 and is smaller than or equal to the number of carbon atoms in R2, is reacted with at least one monohydric alcohol of formula (II) R3—OH (II), where R3 represents an optionally substituted hydrocarbon group containing 1 to 30 C atoms, using microwave radiation in a reaction tube, the longitudinal axis of which extends in the direction of propagation of the microwaves of a single-mode microwave applicator, so as to obtain at least one ester of formula (III) R1—COO—R3 (III), where R1 and R3 have the meanings indicated above.
Abstract:
The invention relates to a continuous method for producing amides of aromatic carboxylic acids by reacting at least one carbonic acid ester of formula (I) R3—OOOR4, wherein R3 represents an optionally substituted aromatic hydrocarbon group with 5 to 100 carbon atoms and R4 represents a hydrocarbon group with 1 to 30 carbon atoms, with at least one amine of formula (II) HNR1R2, wherein R1 and R2 independently represent hydrogen or a hydrocarbon group with 1 to 100 C atoms, 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 carboxamide.
Abstract:
The invention relates to a continuous method for producing amides of aliphatic carboxylic acids by reacting at least one carbonic acid ester of formula (I) R3—COOR4 (I), wherein R3 represents hydrogen or an optionally substituted aliphatic hydrocarbon group with 1 to 100 carbon atoms and R4 represents a hydrocarbon group with 1 to 30 carbon atoms, or wherein R3 and R4 form an optionally substituted ring with 5, 6 or 7 ring members, with at least one amine of formula (II) HNR1R2 (II), wherein R1 and R2 independently represent hydrogen or a hydrocarbon group with 1 to 100 C atoms, 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 carboxamide.
Abstract:
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.
Abstract:
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.
Abstract:
The invention relates to a method for producing fatty acid alkanol amides by reacting at least one amine that contains at least one primary or secondary amino group and at least one hydroxyl group with at least one fatty acid to form an ammonium salt, said ammonium salt being subsequently converted into the alkanol amide by means of microwave radiation.
Abstract:
The invention relates to a continuous method for producing fatty acid amides, according to which at least one fatty acid of formula (I), R3—COOH (I) wherein R3 is an optionally substituted aliphatic hydrocarbon radical, is reacted with at least one amine of formula (II), HNR1R2 (II) wherein R1 and R2 are independently hydrogen or a hydrocarbon radical comprising between 1 and 100 C atoms, to form an ammonium salt, and said ammonium salt is then reacted to form a fatty acid amide, under microwave irradiation in a reaction pipe, the longitudinal axis of the pipe being oriented in the direction of propagation of the microwaves of a monomode microwave applicator.
Abstract:
The invention relates to the use of at least one oil-soluble compound B) which acts as a nucleating agent for paraffin crystallization and which is selected from comb polymers that carry alkyl side chains having on average a length of at least 18 C atoms per mole for improving the response of cold flow improvers for mineral oils C), which are different from B), in middle distillates that contain at least one ashless, nitrogenous detergent additive A), which is an oil-soluble, amphiphilic compound that comprises at least one alkyl or alkenyl group bound to a polar group, said alkyl or alkenyl group having 10 to 500 C atoms and the polar group having 2 or more nitrogen atoms.
Abstract:
The invention relates to the use of at least one oil-soluble compound B) which acts as a nucleating agent for paraffin crystallization and which is selected from substantially linear hydrocarbons with at least 22 C atoms, for improving the response of cold flow improvers for mineral oils C) in middle distillates that contain at least one ashless, nitrogenous detergent additive A), which is an oil-soluble, amphiphilic compound that comprises at least one alkyl or alkenyl group bound to a polar group, said alkyl or alkenyl group having 10 to 500 C atoms and the polar group having 2 or more nitrogen atoms.
Abstract:
The present invention provides oily liquids comprising A) at least one ester of fatty acids whose carbon chain lengths are between 8 and 30 carbon atoms, and a monohydric C1-C5-alcohol, at least 50% of the fatty acid radicals containing at least one double bond, and B) at least one alkylphenol-aldehyde resin, obtainable by condensing (i) at least one alkylphenol having at least one C6-C24-alkyl or C6-C24-alkenyl radical and (ii) at least one aldehyde or ketone to a degree of condensation of between 2 and 50 alkylphenol units.