Abstract: A motor-compressor unit for sub-sea applications, including a pressure casing, and an electric motor housed in a motor compartment formed in the pressure casing and a compressor housed in a compressor compartment formed in the pressure casing. A shaft drivingly connects the electric motor and the compressor. At least one magnetic bearing rotatingly supports the shaft and a control system is provided for controlling the magnetic bearing. The control system is housed in a control system compartment structurally connected to and supported by the pressure casing.

Abstract: A centrifugal compressor unit including a motor having a rotor, at least one compressor having a shaft driven by the rotor; and a set of bladed wheels fitted on the driven shaft, the motor and the compressor being mounted in a common watertight casing. It further includes cooling means for cooling the motor, the cooling means having a gas cooler outside the casing. In operation, the motor, the compressor and the casing having the motor and the compressor are arranged horizontally, one axial thrust bearing only being provided on a compressor side.

Abstract: A motor-compressor unit for sub-sea applications, including a pressure casing, and an electric motor housed in a motor compartment formed in the pressure casing and a compressor housed in a compressor compartment formed in the pressure casing. A shaft drivingly connects the electric motor and the compressor. At least one magnetic bearing rotatingly supports the shaft and a control system is provided for controlling the magnetic bearing. The control system is housed in a control system compartment structurally connected to and supported by the pressure casing.

Abstract: Chloro-bis(alkylamino)-s-triazines are prepared by step-wise replacement of two chlorine atoms of cyanuric chloride by reaction with amines and alkali metal hydroxide in a medium comprising water and a liquid organic compound which is a solvent for cyanuric chloride and is substantially immiscible with water, the first step being carried out by contacting a first amine with a reaction medium containing the cyanuric chloride and the whole of the alkali metal hydroxide used for the step-wise replacement.

Abstract: In the commercial process for preparing chloro-bis(aklylamino)-s-triazines by step-wise replacement of two chlorine atoms of cyanuric chloride with alkylamino groups in which a molar excess of alkylamine is used in the second replacement step, the formation of tris-(alkylamino)-s-triazines is suppressed by submitting the reaction mixture, after the second replacement step is completed, to a pressure not exceeding 400 mm Hg, at a temperature not exceeding about 55.degree. C. and for a period not exceeding about 15 minutes, thereby removing the excess alkylamine from said reaction mixture by volatilization without substantially removing the other components of the reaction mixture.