Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
  • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
  • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
  • F25J3/0223—H2/CO mixtures, i.e. synthesis gas; Water gas or shifted synthesis gas
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
  • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
  • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
  • F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
  • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
  • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
  • F25J3/0252—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of hydrogen
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
  • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
  • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
  • F25J3/0261—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of carbon monoxide
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2200/00—Processes or apparatus using separation by rectification
  • F25J2200/40—Features relating to the provision of boil-up in the bottom of a column
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2200/00—Processes or apparatus using separation by rectification
  • F25J2200/70—Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2200/00—Processes or apparatus using separation by rectification
  • F25J2200/72—Refluxing the column with at least a part of the totally condensed overhead gas
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2205/00—Processes or apparatus using other separation and/or other processing means
  • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
  • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2210/00—Processes characterised by the type or other details of the feed stream
  • F25J2210/42—Nitrogen
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
  • F25J2260/10—Integration in a gas transmission system at a pressure reduction, e.g. "let down" station
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
  • F25J2260/42—Integration in an installation using nitrogen, e.g. as utility gas, for inerting or purging purposes in IGCC, POX, GTL, PSA, float glass forming, incineration processes, for heat recovery or for enhanced oil recovery
  • F25J2260/44—Integration in an installation using nitrogen, e.g. as utility gas, for inerting or purging purposes in IGCC, POX, GTL, PSA, float glass forming, incineration processes, for heat recovery or for enhanced oil recovery using nitrogen for cooling purposes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2270/00—Refrigeration techniques used
  • F25J2270/02—Internal refrigeration with liquid vaporising loop
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2270/00—Refrigeration techniques used
  • F25J2270/12—External refrigeration with liquid vaporising loop
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2270/00—Refrigeration techniques used
  • F25J2270/14—External refrigeration with work-producing gas expansion loop
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J2270/00—Refrigeration techniques used
  • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
  • F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open loop

Definitions

• the present invention relates to a method and apparatus for the cryogenic separation of a mixture of hydrogen and carbon monoxide.
• the mixture may also comprise nitrogen and / or methane and / or argon.
• the production units for carbon monoxide and hydrogen can be separated into two parts:
• cryogenic separation unit known as a cold box for the production of
• the acid gas removal unit comprises a methanol wash process which requires a low pressure nitrogen gas flow as the stripping gas.
• This nitrogen is generally produced by an apparatus for separating air, for example by cryogenic distillation, or is available at medium pressure and then is expanded in a valve before feeding the stripping column. It is known from US2009 / 0191113 to use a nitrogen flow rate as the gas sent to the bottom of a column fed at the top with methanol containing ammonia from a methanol washing unit. The nitrogen exits the ammonia-enriched column head and the tank methanol which is purified to ammonia can be returned to the washing unit.
• the cryogenic separation unit generally comprises a CO compressor that provides the separation energy where part of the high pressure CO is cooled, condensed, then relaxed and vaporized in the exchange line before recompression in the CO cycle compressor.
• the invention uses the expansion of the medium pressure nitrogen necessary to have the stripping gas at the right pressure in the cryogenic separation unit in order to reduce the compression energy of the CO cycle or to completely replace it.
• the liquefied nitrogen is expanded in a Joule-Thomson valve, which makes it possible either to reduce the flow rate of the CO cycle, or to reduce the number of stages of the compressor CO or to replace it completely.
• the scheme may also include the expansion of a portion of the medium pressure nitrogen in a flash turbine.
• a process for the cryogenic separation of a mixture of hydrogen and carbon monoxide and optionally methane and / or nitrogen and / or argon in which:
• the hydrogen-depleted liquid is sent at least partly at the head of a depletion column, operating at a pressure between 5 and 25 bar abs, after expansion in a valve,
• the hydrogen-enriched gas is reheated in the heat exchanger, possibly without having been expanded or separated and possibly not recycled to the synthesis gas
• a carbon monoxide enriched product is derived from at least a portion of the bottoms liquid of the depletion column and vii)
• a nitrogen-rich gas flow is cooled in the heat exchanger by introducing it at the hot end thereof, leaving at least a portion of the cooled nitrogen-rich gas flow at the cold end thereof, and in at least a part of it, liquefies at least a portion of the nitrogen-rich gas flow, vaporizes less of a liquefied portion of Pau, is heated, the heating takes place at least partially in the heat exchanger before extracting at least a portion as a nitrogen-rich gaseous product and the nitrogen-rich gaseous product is fed to a stripping column as a stripping gas.
• At least a portion of the liquefied nitrogen-rich gas is vaporized in the heat exchanger.
• the gas rich in nitrogen and the gas rich in liquefied nitrogen are not separated by distillation.
• the mixture contains methane and at least a portion of the bottoms liquid from the exhaustion column is sent to a separation column to produce a carbon monoxide enriched gas and a methane enriched liquid and at least a portion of the
• the liquefied nitrogen is vaporized in a head condenser of the separation column.
• the gaseous product rich in nitrogen is sent to the bottom of a column fed at the top by a flow containing methane! and ammonia, in order to produce ammonia-purified methanol at the bottom of the column,
• the mixture is treated upstream of stage i) by the methanol washing process.
• the mixture warms the tank of the exhaust column and, if necessary, the tank of the separation column upstream of the first phase separator.
• the nitrogen gas comes from an air separation apparatus and / or a nitrogen gas line
• the synthesis gas is separated in a single phase separator upstream of the exhaustion column
• the depletion column is a column equipped with trays or packings
• any other phase separator contains neither packings nor trays
• the synthesis gas contains methane and a part of the liquid from the bottom of the exhaustion column is sent to a separation column to produce a gas enriched with carbon monoxide and a liquid enriched in methane,
• the hydrogen enriched gas contains at least 20 mol% of carbon monoxide, or even at least 25 mol% of carbon monoxide.
• the hydrogen enriched gas is fed as a feed gas to a methanol production unit.
• the gas enriched with carbon monoxide is produced with a yield of at most 80%, or even at most 75%.
• the method does not include a step of compressing a fluid except possibly the mixture upstream of step i).
• the mixture warms the tank of the exhaust column and, if necessary, the tank of the separation column upstream of the first phase separator.
• an apparatus for separating a mixture containing hydrogen, carbon monoxide and optionally methane and / or nitrogen and / or argon comprising heat exchanger, a first phase separator, a depletion column, means for sending the synthesis gas to cool in the heat exchanger, means for sending the partially condensed synthesis gas to the first phase separator to produce a hydrogen-enriched gas and a hydrogen-depleted liquid, means for removing the hydrogen-enriched gas from the apparatus after reheating in the heat exchanger and without having expanded, separated or recycled with the synthesis gas, means for sending the hydrogen depleted liquid at least partly to the top of the depletion column after expansion in a valve, means for removing a top gas from the depletion column of the apparatus after I'ttingur heating in heat and without having relaxes or separated, means for sending the at least a portion of the bottom liquid of the stripping column is at least partially vaporized in the heat exchanger and optionally heated to the hot end of the heat exchanger
• the apparatus comprises:
• the heat exchanger for vaporizing there, without means of pressurization between the tank of the column of exhaustion and the exchanger of heat.
• a separation column for producing a gas enriched with carbon monoxide and a liquid enriched in methane
• the tank of the exhaustion column contains a reboiler
• the tank of the separation column contains a reboiler
• the apparatus does not include a turbine.
• a partial condensation step is followed by a depletion step in a column.
• the synthesis gas containing hydrogen and carbon monoxide 1 as well as possibly methane and / or nitrogen and / or argon is purified in a purification unit 3 to remove water and / or methanol and / or carbon dioxide.
• the formed gas is partially cooled in a heat exchanger E and then serves to heat the liquid 23 of the bottom reboiler 21 of the depletion column 13; The thus cooled gas is further cooled to the cold end of the heat exchanger E by partially condensing and is sent to a phase separator 9 where separation of the formed liquid and gas takes place.
• a hydrogen-enriched gas 7 is withdrawn from the head of the phase separator and sent to a methanol production unit where carbon monoxide and hydrogen react by catalysis to form methanol or are sent for further purification in a methanol plant.
• PSA type unit The hydrogen-depleted liquid 11 is expanded and sent to the top of the depletion column 13.
• the gas 15 formed at the top of the depletion column 13 heats up in the exchanger E.
• the liquid 17 is expanded in a valve and vaporizes in the heat exchanger E to form the product CO, without having been pressurized.
• the process is kept cold by an open cycle in which nitrogen gas 71 from an air separation apparatus and / or pipe is cooled in the heat exchanger E.
• Part 73 of the Nitrogen gas is optionally expanded to an intermediate temperature of the exchanger in a turbine 79 and returned thereto for heating.
• the remainder 75 of the nitrogen gas cools to the cold end of the heat exchanger, is expanded to a lower temperature in the valve 77 and then reheated in the heat exchanger E, mixed with the flow rate 73
• the heated nitrogen 84 exits at the hot end of the heat exchanger and is sent to either a methanol wash unit.
• the tank liquid 17 of the depletion column 13 of FIG. 1, containing methane and carbon monoxide, is sent to a column Part of the tank liquid 17A is sent directly to the middle of the separation column 37 after expansion in a valve and the remainder 17B is cooled in the heat exchanger E after expansion and sent to a level intermediate of column 37.
• a liquid rich in methane 42 is withdrawn from the tank of the column CO / CH4 37 and then is vaporized in the heat exchanger E.
• the carbon monoxide 41 exits as a gaseous product from the top of the column CO / CH4 37 and warms up in heat exchanger E.
• the separation column 37 includes a head condenser 85 where the overhead gas of the column 37 is condensed and where a portion of the cycle nitrogen vaporizes.
• the process is held in cold by an open cycle in which nitrogen gas 71 from an air separation apparatus and / or pipe is cooled in the heat exchanger E.
• Part 73 of the nitrogen gas is expanded to an intermediate temperature of the exchanger in a turbine 79 and returned to it to heat up.
• the remainder of the nitrogen gas cools to the cold end of the heat exchanger, and is divided in half.
• a portion 76 is expanded to a lower temperature in the valve 80 and then sent to the enclosure 39 around the condenser 85.
• the other portion 78 is expanded in a valve 82.
• the heated nitrogen 84 exits at the end heat exchanger and is sent to a stripping column to either a methanol wash unit.
• a product of the distillation can be sent to the production of MEG (mono ethylene glycol), TDI / MDI (toluene diisocyanate and / or methylene diphenyl diisocyanate) or PC (Polycarbonates)
• MEG mono ethylene glycol
• MDI toluene diisocyanate and / or methylene diphenyl diisocyanate
• PC Polycarbonates
• FIG. 3 An alternative of Figure 2 illustrated in Figure 3 illustrates the case where all the nitrogen cooled to the cold end of the exchanger E is sent by the valve 80 to the chamber 39 to be vaporized by the condenser 85. formed nitrogen 78 is heated in the exchanger and is mixed with the nitrogen 73 from the turbine 79 to form the product.
• a product of the distillation can be sent to the production of MEG (mono ethylene glycol), TDI / MDI (toluene di-isocyanate and / or methylene diphenyl di-isocyanate) or PC (Polycarbonates).
• MEG mono ethylene glycol
• MDI toluene di-isocyanate and / or methylene diphenyl di-isocyanate
• PC Polycarbonates
• the exhaustion column operates at between 5 and 25 bar abs.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Separation By Low-Temperature Treatments (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=57583349

Family Applications (1)

Country Status (3)

Citations (4)

Family Cites Families (2)

• 2016
  • 2016-10-28 FR FR1660482A patent/FR3058207B1/fr active Active
• 2017
  • 2017-10-20 CN CN201780080381.0A patent/CN110114627B/zh active Active
  • 2017-10-20 WO PCT/FR2017/052892 patent/WO2018078249A1/fr active Application Filing

Patent Citations (4)

Also Published As

Similar Documents

Legal Events