Use of a composition comprising silane compounds for coating column internals (preferably a plate, a package comprising several plates, a structured package and/or a filler body) used in reactive rectification

摘要

#CMT# #/CMT# Use of a composition (2) comprising silane compounds (I) and (II) for coating column internals used in reactive rectification, is claimed. #CMT# : #/CMT# Use of a composition (2) comprising silane compounds of formulae (Si(OR1) 4) (I) and (R2(SiOR1) 3) (II) for coating column internals used in reactive rectification, is claimed. R1, R2 : optionally saturated 1-18C alkyl group or 6-12C aryl. Independent claims are included for: (1) a method for coating column internals usable in reactive rectification comprising (a) preparing a liquid mixture comprising the composition, at least a further additive, at least an organic solvent, and optionally a buffer system and water, (b) coating the column internals by immersing in the liquid mixture for 0.1-10 minutes, preferably 10-60 seconds, (c) optionally repeating the step (b) for 1-20 (preferably 3-5) times, and (d) drying the coated column internals for 1 hour to 7 days (preferably 2-4 days); (2) a reactive rectification device comprising the column internals; and (3) a method of reactive rectification that uses the column internals and reactive rectification device. #CMT#USE : #/CMT# The composition is useful for coating column internals used in reactive rectification, where the column internals are a plate, a package comprising several plates, a structured package and/or a filler body, and the column internals are made of a metal, preferably steel or aluminum, ceramics, glass and/or plastics (all claimed). #CMT#ADVANTAGE : #/CMT# The composition provides the coating that is stable at high temperatures and pressures, preferably under boiling conditions. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows schematic representation of a coated plate as a part of a structured packing as column internals. 1 : Plate 2 : Composition. #CMT#BIOLOGY : #/CMT# Preferred Components: The composition further comprises at least a catalyst, preferably an inorganic catalyst and/or biocatalyst. The biocatalyst is present in the form of an enzyme of prokaryotic and/or a eukaryotic organism. The biocatalyst is a hydrolyzing enzyme, preferably lipases, esterases, amylases, pullulanases or glucosidases, oxidizing and/or reducing enzymes including oxidases, bacteria of genus Escherichiaand Pseudomonas, yeasts of the genus Saccharomycesor Candida, or fungi of the genus Rhizopus, Penicilliumor Aspergillus. #CMT#INORGANIC CHEMISTRY : #/CMT# Preferred Components: (I) and (II) are used in a mass ratio of 1:10 (preferably 1:4). The composition comprises tetramethoxysilane and methyltrimethoxysilane. The composition comprises at least an inorganic compound for the reaction of the silane compounds, preferably ammonium- and alkali metal hydroxides and -fluorides. Preferred Method: The immersion of the column internals in step (b) takes place at the time of incipient gelation of the mixture prepared in step (a). #CMT#EXAMPLE : #/CMT# Tetramethoxysilane (3.05 g), methyltrimethoxysilane (10.9 g) and methanol (12.88 g) were mixed and stirred for several minutes to give a mixture-I. Water (4.78 g), 1 M aqueous sodium fluoride solution (1.88 g) and polyethylene glycol (0.52 g) were mixed. Subsequently lipase B from Candida antarctica(2 g) was added and mixed to obtain a mixture-II. The mixture-I was added to the mixture-II and thoroughly mixed. After few minutes, the resulting solution was left at room conditions for the gelation.