JP5158719B2 - (クロロ)炭化水素とホスゲンとを含む塩化水素ガス流から(クロロ)炭化水素を含まない塩化水素とホスゲンを含まない(クロロ)炭化水素とを回収する方法 - Google Patents
(クロロ)炭化水素とホスゲンとを含む塩化水素ガス流から(クロロ)炭化水素を含まない塩化水素とホスゲンを含まない(クロロ)炭化水素とを回収する方法 Download PDFInfo
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- JP5158719B2 JP5158719B2 JP2008551785A JP2008551785A JP5158719B2 JP 5158719 B2 JP5158719 B2 JP 5158719B2 JP 2008551785 A JP2008551785 A JP 2008551785A JP 2008551785 A JP2008551785 A JP 2008551785A JP 5158719 B2 JP5158719 B2 JP 5158719B2
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- Prior art keywords
- hydrogen chloride
- gas stream
- chloro
- adsorbent
- hydrocarbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 231
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 229910000041 hydrogen chloride Inorganic materials 0.000 title claims abstract description 150
- 125000001309 chloro group Chemical group Cl* 0.000 title claims abstract description 68
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 66
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 66
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 33
- 239000007789 gas Substances 0.000 title claims description 192
- 238000000034 method Methods 0.000 title claims description 56
- 230000008929 regeneration Effects 0.000 claims abstract description 65
- 238000011069 regeneration method Methods 0.000 claims abstract description 65
- 239000003463 adsorbent Substances 0.000 claims description 109
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 49
- 239000000460 chlorine Substances 0.000 claims description 49
- 229910052801 chlorine Inorganic materials 0.000 claims description 49
- 238000001179 sorption measurement Methods 0.000 claims description 45
- 239000007788 liquid Substances 0.000 claims description 37
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 25
- 239000001301 oxygen Substances 0.000 claims description 25
- 229910052760 oxygen Inorganic materials 0.000 claims description 25
- 230000003647 oxidation Effects 0.000 claims description 21
- 238000007254 oxidation reaction Methods 0.000 claims description 21
- 238000004821 distillation Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 229910001868 water Inorganic materials 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 14
- 239000001569 carbon dioxide Substances 0.000 claims description 14
- 239000011261 inert gas Substances 0.000 claims description 14
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 4
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 230000003134 recirculating effect Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 32
- 239000003054 catalyst Substances 0.000 description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 15
- 238000010586 diagram Methods 0.000 description 13
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 12
- 239000000047 product Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000000758 substrate Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 8
- 230000003197 catalytic effect Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 229910052707 ruthenium Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000011552 falling film Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 4
- 238000005292 vacuum distillation Methods 0.000 description 4
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- 229910052746 lanthanum Inorganic materials 0.000 description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 150000003304 ruthenium compounds Chemical class 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 2
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- 239000002253 acid Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 239000002585 base Substances 0.000 description 2
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- 239000006227 byproduct Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000010725 compressor oil Substances 0.000 description 2
- 229940117389 dichlorobenzene Drugs 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 238000011143 downstream manufacturing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 229910052762 osmium Inorganic materials 0.000 description 2
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 2
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- 239000008188 pellet Substances 0.000 description 2
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- 238000010926 purge Methods 0.000 description 2
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- 238000010992 reflux Methods 0.000 description 2
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- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 2
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 description 2
- 229910052706 scandium Inorganic materials 0.000 description 2
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
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- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
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- ACXCKRZOISAYHH-UHFFFAOYSA-N molecular chlorine hydrate Chemical compound O.ClCl ACXCKRZOISAYHH-UHFFFAOYSA-N 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
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- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
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- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 1
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- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- GBXQPDCOMJJCMJ-UHFFFAOYSA-M trimethyl-[6-(trimethylazaniumyl)hexyl]azanium;bromide Chemical compound [Br-].C[N+](C)(C)CCCCCC[N+](C)(C)C GBXQPDCOMJJCMJ-UHFFFAOYSA-M 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/07—Purification ; Separation
- C01B7/0706—Purification ; Separation of hydrogen chloride
- C01B7/0718—Purification ; Separation of hydrogen chloride by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
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Description
(2)酸塩化物の製造、
(3)ポリカーボネートの製造、
(4)エチレンジクロライドから塩化ビニルの製造、
(5)芳香族化合物の塩素化。
i)第一の工程において、第一の吸着体と第二の吸着体を直列に接続し、まず第一の吸着体、次いで第二の吸着体にホスゲン及び(クロロ)炭化水素を含む新しい塩化水素ガス流を、第一の吸着体による(クロロ)炭化水素の吸着が実質的になくなるまで通過させ、
ii)第二の工程において、第一の吸着体を再生させながら新しい塩化水素ガス流を第二の吸着体に通過させ、再生により実質的にホスゲンを含まない(クロロ)炭化水素を得、
iii)第三の工程において、新しい塩化水素ガス流をまず第二の吸着体次いで再生した第一の吸着体に、第二の吸着体による(クロロ)炭化水素の吸着が実質的になくなるまで通過させ、
iv)第四の工程において、第二の吸着体を再生させながら新しい塩化水素ガス流を第一の吸着体に通過させ、再生により実質的にホスゲンを含まない(クロロ)炭化水素を得ることを含み、
これらの工程i)〜工程iv)を一回以上連続的に実施してもよい方法により達成されることを本発明者が見出した。
a)塩化水素と(クロロ)炭化水素とホスゲンとを含むガス流を精製して、ホスゲンを含まない(クロロ)炭化水素と、実質的に(クロロ)炭化水素非含有のHCl含有供給ガス流b1を得る工程;
b)HCl含有ガス流b1と酸素含有ガス流b2とを酸化ゾーンに導入し、塩化水素を塩素に接触酸化させて、塩素と水、酸素、塩化水素、二酸化炭素、不活性ガスを含む生成物ガス流b3を得る工程;
c)生成物ガス流b3を相接触装置中で水性の塩酸Iと接触させ、ガス流b3から部分的に水と塩化水素とを除去して、塩化水素と塩素、水、酸素、二酸化炭素、また場合によっては不活性ガスを含むガス流cを得る工程(ただし、ガス流b3中の少なくとも5%の塩化水素は、ガス流cに残留する);
d)ガス流cを乾燥して、実質的に水を含まない、塩化水素と、塩素、酸素、二酸化炭素、及び場合によっては不活性ガスを含むガス流dとする工程;
e)ガス流dを圧縮と冷却により部分的に液化させ、少なくとも部分的に液化したガス流eとする工程;
f)ガス流eを気液分離させて、塩素と酸素、二酸化炭素及び場合に応じて不活性ガスを含むガス流f1と、塩化水素と塩素、酸素、二酸化炭素を含む液流f2とし、また、適当ならガス流f1の少なくとも一部を工程b)に再循環させる工程;
g)液流f2を、蒸留塔で分離して、塩素ガス流g1と実質的に塩化水素と酸素と二酸化炭素とからなる液流g2とする工程(なお、塔頂で塩化水素の一部が凝縮させ塔内に還流させることで、塩素含量が1質量%未満の液流g2が得られる)。
比較的小さな体積のガス流のみが吸収工程hで得られるため、
小型の捕集塔で塩化水素が分離が可能となる。
2・・・HCl排出ライン
3・・・(クロロ)炭化水素排出ライン
4・・・第一の吸着体
5・・・第二の吸着体
6・・・ヒーター
7・・・冷却器及び凝縮器
8・・・相分離器
9・・・受液器
10・・ポンプ
11・・圧縮機
Claims (7)
- (クロロ)炭化水素を含まない塩化水素及びホスゲンを含まない(クロロ)炭化水素を、(クロロ)炭化水素及びホスゲンを含む塩化水素流から回収する方法であって、
i)第一の工程において、第一の吸着体と第二の吸着体を直列に接続し、まず第一の吸着体、次いで第二の吸着体にホスゲン及び(クロロ)炭化水素を含む新しい塩化水素ガス流を、第一の吸着体による(クロロ)炭化水素の吸着が実質的になくなるまで通過させ、
ii)第二の工程において、第一の吸着体を再生させながら新しい塩化水素ガス流を第二の吸着体に通過させ、再生により実質的にホスゲンを含まない(クロロ)炭化水素を得、
iii)第三の工程において、新しい塩化水素ガス流を、第二の吸着体による(クロロ)炭化水素の吸着が実質的になくなるまで、まず第二の吸着体、次いで再生した第一の吸着体に通過させ、
iv)第四の工程において、第二の吸着体を再生させながら新しい塩化水素ガス流を第一の吸着体に通過させ、再生により実質的にホスゲンを含まない(クロロ)炭化水素を得ることを含み、これらの工程i)〜工程iv)を一回以上連続的に実施してもよい方法。 - 上記再生工程ii)及び/又はiv)において、各吸着体に含まれる塩化水素を、圧縮機、ヒーター、凝縮器及び相分離器からなる閉回路における循環ガスとして、吸着剤床上を通過させ、循環塩化水素ガス流を吸着剤床に入る前に加熱し、吸着剤床を出た後冷却し、
液体状の、実質的にホスゲンを含まない(クロロ)炭化水素を凝縮器及び相分離器に回収する請求項1に記載の方法。 - 第一の工程iia)またはiva)において上記循環塩化水素ガス流を吸着剤床に入る前に加熱し、吸着剤床を出た後冷却し、第二の工程iib)またはivb)において循環塩化水素ガス流の冷却のみを行い、液体状の、実質的にホスゲンを含まないクロロ炭化水素を凝縮器及び相分離器に得る請求項2に記載の方法。
- 上記再生工程ii)及び/又はiv)において循環ガスを吸着剤床上で吸着工程i)またはiii)と比較して逆方向に通過させ、工程iia)とiib)または工程iva)及びivb)の間で循環ガス流の方向を再び逆転させる請求項3に記載の方法。
- 上記再生工程ii)及び/又はiv)において、新しい塩化水素ガス流の少なくとも支流が、分岐され、加熱され、再生すべき吸着剤床及び次に凝縮器及び相分離器を通過させ、液体状の、実質的にホスゲンを含まない(クロロ)炭化水素が回収され、次いで、場合により、この支流を新しい塩化水素の本流に合流させた後、吸着操作中の他方の吸着剤を通過させる請求項1に記載の方法。
- 第一の工程iia)またはiva)において前記支流を吸着剤床に入る前に加熱し、吸着剤床を出た後冷却し、第二の工程iib)またはivb)においては支流を加熱せずに、液体状の、実質的にホスゲンを含まない(クロロ)炭化水素を凝縮器及び相分離器中に得る請求項5に記載の方法。
- (クロロ)炭化水素及びホスゲンを含む塩化水素から塩素を製造する方法であって、以下の工程:
a)塩化水素と(クロロ)炭化水素とホスゲンとを含むガス流を請求項1〜6のいずれか1項に記載の方法により精製して、ホスゲンを含まない(クロロ)炭化水素と、実質的に(クロロ)炭化水素非含有のHCl含有供給ガス流b1を得る工程;
b)HCl含有ガス流b1と酸素含有ガス流b2とを酸化ゾーンに導入し、塩化水素を塩素に接触酸化させて、塩素、塩化水素、水、酸素、二酸化炭素、及び不活性ガスを含む生成物ガス流b3を得る工程;
c)生成物ガス流b3を相接触装置中で水性の塩酸Iと接触させ、ガス流b3から部分的に水と塩化水素とを除去して、塩化水素、塩素、水、酸素、二酸化炭素、及び場合によっては不活性ガスを含むガス流cを得、ガス流b3中の少なくとも5%の塩化水素は、ガス流cに残留させる工程;
d)ガス流cを任意に乾燥して、実質的に水を含まない、塩化水素、塩素、酸素、二酸化炭素、及び場合によっては不活性ガスを含むガス流dとする工程;
e)ガス流dを圧縮と冷却により部分的に液化させ、少なくとも部分的に液化したガス流eとする工程;
f)ガス流eを気液分離させて、塩素、酸素、二酸化炭素及び場合に応じて不活性ガスを含むガス流f1と、塩化水素、塩素、酸素、二酸化炭素を含む液流f2とし、及び場合によりガス流f1の少なくとも一部を工程b)に再循環させる工程;
g)液流f2を、蒸留塔で分離して、塩素ガス流g1と、実質的に塩化水素と酸素と二酸化炭素とからなる液流g2を得る工程を含み、塔頂で塩化水素の一部を凝縮させ塔内に還流させることで、塩素含量が1質量%未満の液流g2が得られる、製造方法。
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