A process for preparing trans-enriched MDACH, including: distilling an MDACH starting mixture in the presence of an auxiliary, which is an organic compound having a molar mass of 62 to 500 g/mol, a boiling point at least 5° C. above the boiling point of cis,cis-2,6-diamino-1-methylcyclohexane, and 2 to 4 functional groups, each of which is independently an alcohol group or a primary, secondary or tertiary amino group. The MDACH starting mixture includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, based on the total amount of MDACH present in the MDACH starting mixture. The MDACH starting mixture includes both trans and cis isomers. Trans-enriched MDACH includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, where the proportion of trans isomers in the mixture is higher than the proportion of trans isomers in the MDACH starting mixture.

An industrial washing process for various items such as precision small parts, mechanical parts, printed circuits, lenses, watchmaking articles, jewelry, eyewear or the like, includes regeneration of the used solvent by means of a first distillation and the step of drying the material in a vacuum chamber. The regeneration step includes at least one step of distillation through thermocompression carried out by compressing the solvent vapors by a pump and conveying them to an exchanger at higher pressure and temperature than the distiller. In this way the liquid to be evaporated can be used to condense the vapors with total recovery of the condensation energy, in this way avoiding the use of external thermal energy sources and obtaining a very high distillation capacity with lower energy consumption compared to a traditional condenser, and can also be used in a vacuum distillation step, if necessary, to further concentrate the distillation residues.

A desalination device includes a sealed desalination chamber with two compartments, an evaporator space that contains saline water, and a condenser space that contains fresh water, a saline water distribution mechanism that directs the saline water into the evaporator space, a vapor compressor that directs a stream of pressurized freshwater vapor into the condenser space, and an integrated regenerative boundary between the evaporator space and the condenser space that has two sides, an evaporation surface and a condensation surface, enabling the pressurized freshwater vapor to condense on the condensation surface to generate freshwater, and where the latent heat of the condensation process transfers across the integrated regenerative boundary into the evaporator space and evaporates a portion of the saline water to produce freshwater vapor.

The present invention is directed to a system and process for fractionating a hydrocarbon liquid feed using a single dividing wall column (DWC), an externally heated reboiler connected to the DWC, and a deisobutanizer (DIB) integrated with a compressor. The majority of all externally supplied heat energy supplied to the system is input to the system via the externally heated reboiler of the DWC.

A distillation device may comprise a source fluid input and an evaporator in fluid communication therewith. The device may further comprise a compressor having an impeller coupled to a motor, the compressor having a low pressure inlet for vapor from the evaporator and a high pressure outlet for compressed vapor. The device may further comprise at least one temperature sensor configured to monitor temperature of vapor in the inlet and a condenser in heat transfer relationship with exterior surfaces of the evaporator and in fluid communication with the compressor outlet. The device may further comprise a controller configured to govern rotation speed of the impeller with an impeller motor command based on a calibrated motor speed for the distillation device. The controller may be configured to determine an adjusted motor speed for a next use of the device and overwrite the calibrated motor speed with the adjusted motor speed.

The present system is for simultaneous recovery of purified water and dissolved solids from impure high TDS water (1) which is achieved in a single step and eliminates the use of external thermal energy for making the system significantly efficient. It eliminates the use of boiler, cooling tower that reduces the overall capital cost and continuous requirement of external thermal energy for making system efficient. The simultaneous recovery of the purified water and solids from high TDS input effluent reduce the energy intensity of the system. Said system provides a vacuum system as heat pump which enables the system to be self-sufficient in thermal energy requirements for evaporation process and reduces GHG emissions significantly.

The present invention relates to an energy saving method for separating an unreacted monomer, by which an unreacted monomer may be easily recovered from a mixture solution including an unreacted monomer, and a separation system which is capable of performing the method.

The invention relates to a water purification system and distillation unit. The water purification system (3) comprises an input section (31) for providing water (21), in particular tap water, to a distillation unit (1), and said distillation unit (1) for producing distilled water. Said distillation unit comprises an evaporation section (12) for evaporating said water (21) and producing steam (23), and a condensation section (14) for at least partly condensing said steam (23), producing distilled water. The system further comprises a first admixing unit (32), in particular a cartridge, which is arranged and configured in such a way that it is enabled for admixing compounds, in particular minerals, to said distilled water, producing enriched distilled water, and an output section (33) for dispensing said enriched distilled water. Said evaporation section (12) is provided by a heatable side (101) of a first Peltier effect device (10) and said condensation section (14) is provided by a coolable side (102) of said first Peltier effect device (10).

A system to treat and desalinate wastewater using a low energy ejector desalination system (LEEDS), which employs a static liquid-gas ejector and maximum heat integration in the water treatment system.

A water vapor distillation system. The system includes a water vapor distillation device configured to receive a volume of source water from a fluid source and produce distillate, the device comprising: a concentrate flow path comprising a concentrate output; a distillate flow path comprising a distillate output; at least one source proportioning valve; a first heat exchanger comprising at least a portion of the distillate flow path; a second heat exchanger including at least a portion of the concentrate flow path, wherein the first heat exchanger and the second heat exchanger in fluid flow communication with the fluid source; a distillate sensor assembly in communication with the distillate flow path and located downstream the first heat exchanger, the distillate sensor assembly configured to generate a distillate temperature measurement; and a controller configured to control the source proportioning valves, the controller configured to: receive the distillate temperature measurement; determine the difference between a first target temperature and the distillate temperature measurement; and split the source water from the fluid source between the first heat exchanger and the second heat exchanger based on the difference between the first target temperature and the distillate temperature measurement.