摘要:
The invention relates to the use of at least one protein, especially at least one hydrophobin or at least one derivative thereof, for improving the phase separation in compositions containing at least two liquid phases. The invention also relates to a method for separating at least two liquid phases in a composition containing at least two liquid phases, and formulations containing at least one compound selected from the group consisting of fuels, combustibles, crude oil or water-soluble or oil-soluble polymer solutions, and at least one protein, especially at least one hydrophobin or derivatives thereof.
摘要:
The invention relates to a method for the continuous production of the tert-butyl ester of an aliphatic C1-C4 carboxylic acid by reacting the carboxylic acid with isobutene in a liquid phase in the presence of an acid catalyst. The reaction is carried out in a reactor divided into several sections. The carboxylic acid, the iso-olefin and the catalyst are introduced into the first section of the reactor, the reaction mixture obtained is removed from the last section of the reactor, and the ester is extracted from said mixture. The reaction temperature in the reactor is controlled in such a way that it ranges from 10 to 40 °C and is highest in the first section of the reactor. The inventive method enables tertiary butyl esters of saturated and unsaturated C1-C4 carboxylic acids to be produced economically and in a technically simple and environmentally friendly manner.
摘要:
The invention relates to a method for the continuous production of the tert-butyl ester of an aliphatic C1-C4 carboxylic acid by reacting the carboxylic acid with isobutene in a liquid phase in the presence of an acid catalyst. The reaction is carried out in a reactor divided into several sections. The carboxylic acid, the iso-olefin and the catalyst are introduced into the first section of the reactor, the reaction mixture obtained is removed from the last section of the reactor, and the ester is extracted from said mixture. The reaction temperature in the reactor is controlled in such a way that it ranges from 10 to 40 °C and is highest in the first section of the reactor. The inventive method enables tertiary butyl esters of saturated and unsaturated C1-C4 carboxylic acids to be produced economically and in a technically simple and environmentally friendly manner.
摘要:
The invention relates to a method for producing a tertiary C4-C8 alkyl (meth)acrylate by reacting (meth)acryl acid with an olefin of formula (I), wherein R?1 and R2¿, which can be identical or different, represent methyl or ethyl and R3 represents H, methyl or ethyl, in a homogeneous phase in the presence of an acidic catalyst and extracting the tertiary C¿4?-C8 alkyl(meth)acrylate from the reaction mixture. According to the invention, the catalyst is separated as a residue in a two-stage distillation of the reaction mixture and the tertiary C4-C8 alkyl(meth)acrylate is extracted from the distillation. The inventive method permits the use of (meth)acryl acid that contains acetic acid. The risk of a breakdown of the ester and the polymerization of the (meth)acryl compounds is reduced. The invention also relates to a falling film evaporator comprising a cylindrical casing (2), a plurality of evaporation tubes (3) located in said casing (2), means (4) for supplying the liquid to be evaporated and means (5) for heating the evaporation tubes (3). Said evaporator is characterised in that at least one evaporation tube (3) has a closed head region (6), into which a supply line (7) for the liquid to be evaporated opens, said supply line (7) communicating with the means (4) for supplying the liquid to be evaporated.
摘要:
The invention relates to a method for producing a tertiary C4-C8 alkyl (meth)acrylate by reacting (meth)acryl acid with an olefin of formula (I), wherein R?1 and R2¿, which can be identical or different, represent methyl or ethyl and R3 represents H, methyl or ethyl, in a homogeneous phase in the presence of an acidic catalyst and extracting the tertiary C¿4?-C8 alkyl(meth)acrylate from the reaction mixture. According to the invention, the catalyst is separated as a residue in a two-stage distillation of the reaction mixture and the tertiary C4-C8 alkyl(meth)acrylate is extracted from the distillation. The inventive method permits the use of (meth)acryl acid that contains acetic acid. The risk of a breakdown of the ester and the polymerization of the (meth)acryl compounds is reduced. The invention also relates to a falling film evaporator comprising a cylindrical casing (2), a plurality of evaporation tubes (3) located in said casing (2), means (4) for supplying the liquid to be evaporated and means (5) for heating the evaporation tubes (3). Said evaporator is characterised in that at least one evaporation tube (3) has a closed head region (6), into which a supply line (7) for the liquid to be evaporated opens, said supply line (7) communicating with the means (4) for supplying the liquid to be evaporated.