Abstract: The invention provides a GDP-mannose-pyrophosphorylase, which is suitable for use in continuous multiple stage processes. The mannose- or mannose-derivative-specific GDP-mannose-prophosphorylase, which can be isolated from microorganisms, has a specific activeity of≧2U/mg, is prepared.

Abstract: A sweeping vehicle for pneumatic take-up of refuse, include a suction mouiece, connected via a first suction line with a refuse container. In order to ensure effective dust removal at the lateral broom independently of the time of year and without use of water, at least on ejector nozzle is provided, whose suction opening is disposed in the suction air intake area of the suction mouthpiece, and which may be connected to a second suction line.

Abstract: A retention system is described for collecting substances from installations. This includes at least one outlet line which opens into at least one flexible container which is joined in am essentially pressure-tight manner. The container is attached to a pressure relief valve and serves as a pressure relief safety device for conducting away substances from the installation. The flexible container must be dimensioned at least so that in the filled state it has an internal volume such that the internal pressure of the joint system of outlet line and flexible container virtually corresponds to the external pressure.

Abstract: Process for the preparation of 2,5-di(phenylamino)terephthalic acid and dialkyl esters thereof in high purity.The invention relates to a process for the preparation of dialkyl 2,5-di(phenylamino)terephthalates of the formula (I) ##STR1## in which R is a hydrogen atom or a methyl group and R' is a methyl group or ethyl group, by dehydrogenation (oxidation) of the corresponding dialkyl 2,5-di(phenylamino)-3,6-dihydroterephthalate with oxygen, which comprises blanketing with oxygen a solution or suspension of the dialkyl 2,5-di(phenylamino)-3,6-dihydroterephthalate in aromatic hydrocarbons in a stirred vessel, circulating this reaction mixture via a spraying device, so that the sprayed reaction mixture is distributed over the reaction mixture present in the stirred vessel, the sprayed reaction mixture being mixed with the circulating gas.The process has the advantage of a short reaction time, combined with favorable space-time yields and simplicity in terms of apparatus.

Abstract: A process for the preparation of 4-halo-3-oxo-2-alkoxyiminobutyric esters.A process for the preparation of 4-halo-3-oxo-2-alkoxyiminobutyric esters by solvent-free halogenation of the liquid substrate of a 3-oxo-2-alkoxyaiminobutyric ester with elemental halogen.

Abstract: When continuously reacting an aqueous solution of 5-aminobenzimidazolone-(2) or a salt thereof with diketene then 5-acetoacetylamino-benzimidazolone is obtained in a smooth and safe reaction without foaming. The product results in high space-time yield and excellent quality.