JP5428015B2 - 軽留塔の改良により生産性を向上させた酢酸製造装置および酢酸製造方法 - Google Patents
軽留塔の改良により生産性を向上させた酢酸製造装置および酢酸製造方法 Download PDFInfo
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 title claims description 177
- 238000004519 manufacturing process Methods 0.000 title claims description 33
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 85
- 238000004821 distillation Methods 0.000 claims description 72
- 238000005810 carbonylation reaction Methods 0.000 claims description 51
- 239000007788 liquid Substances 0.000 claims description 48
- 230000006315 carbonylation Effects 0.000 claims description 47
- 239000003054 catalyst Substances 0.000 claims description 36
- 239000000047 product Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 229910001868 water Inorganic materials 0.000 claims description 27
- 239000012264 purified product Substances 0.000 claims description 25
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 24
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 22
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 22
- 238000000746 purification Methods 0.000 claims description 20
- 239000012043 crude product Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 16
- 239000006200 vaporizer Substances 0.000 claims description 16
- 229910052741 iridium Inorganic materials 0.000 claims description 15
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 14
- 239000010948 rhodium Substances 0.000 claims description 13
- 229910052703 rhodium Inorganic materials 0.000 claims description 12
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 12
- 239000011541 reaction mixture Substances 0.000 claims description 10
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 3
- 230000011987 methylation Effects 0.000 claims 3
- 238000007069 methylation reaction Methods 0.000 claims 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 47
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 24
- 229910002091 carbon monoxide Inorganic materials 0.000 description 24
- 150000002496 iodine Chemical class 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000012429 reaction media Substances 0.000 description 8
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical compound [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 150000001350 alkyl halides Chemical class 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000003446 ligand Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N Propionic acid Chemical compound CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- -1 alkali metal salt Chemical class 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000002815 homogeneous catalyst Substances 0.000 description 2
- 229940071870 hydroiodic acid Drugs 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- XIXADJRWDQXREU-UHFFFAOYSA-M lithium acetate Chemical compound [Li+].CC([O-])=O XIXADJRWDQXREU-UHFFFAOYSA-M 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 150000002902 organometallic compounds Chemical class 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
- 150000004714 phosphonium salts Chemical class 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- WDJHALXBUFZDSR-UHFFFAOYSA-N Acetoacetic acid Natural products CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000021523 carboxylation Effects 0.000 description 1
- 238000006473 carboxylation reaction Methods 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000007810 chemical reaction solvent Substances 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- WOWBFOBYOAGEEA-UHFFFAOYSA-N diafenthiuron Chemical compound CC(C)C1=C(NC(=S)NC(C)(C)C)C(C(C)C)=CC(OC=2C=CC=CC=2)=C1 WOWBFOBYOAGEEA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 1
- 150000002503 iridium Chemical class 0.000 description 1
- HLYTZTFNIRBLNA-LNTINUHCSA-K iridium(3+);(z)-4-oxopent-2-en-2-olate Chemical compound [Ir+3].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O HLYTZTFNIRBLNA-LNTINUHCSA-K 0.000 description 1
- KZLHPYLCKHJIMM-UHFFFAOYSA-K iridium(3+);triacetate Chemical compound [Ir+3].CC([O-])=O.CC([O-])=O.CC([O-])=O KZLHPYLCKHJIMM-UHFFFAOYSA-K 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/23—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups
- C07C51/235—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups of —CHO groups or primary alcohol groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/10—Vacuum distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
- B01D3/4211—Regulation; Control of columns
- B01D3/4261—Side stream
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/10—Preparation of carboxylic acids or their salts, halides or anhydrides by reaction with carbon monoxide
- C07C51/12—Preparation of carboxylic acids or their salts, halides or anhydrides by reaction with carbon monoxide on an oxygen-containing group in organic compounds, e.g. alcohols
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
- C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
- C07C53/08—Acetic acid
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Catalysts (AREA)
Description
QV = ステージへの、蒸気の体積フローレート
ρL = ステージからの、液体の質量密度
ρV = ステージへの、蒸気の質量密度
Claims (20)
- (a)水と、ロジウム触媒、イリジウム触媒およびこれらの混合物から選択される触媒と、ヨウ化メチルとの存在下、メタノールをカルボニル化して、反応器中で酢酸反応混合物を生成させる工程と、
(b)前記酢酸反応混合物のストリームを、液体として再利用されるストリームと、酢酸、ヨウ化メチル、酢酸メチルおよび水を含む粗生成物ストリームとに分ける工程と、
(c)前記粗生成物ストリームを、上部と、下部と、生成物側部取り出し口が設けられた中部とを有する蒸留域を備えた軽留塔に供給する工程と、
(d)前記軽留塔の前記蒸留域内の前記粗生成物ストリームから、ヨウ化メチルおよび酢酸メチルを除去して、前記粗生成物ストリームよりも低濃度のヨウ化メチルおよび酢酸メチルを含み、より精製された生成物ストリームを生成させる工程と、
(e)前記軽留塔の前記側部取り出し口から、前記より精製された生成物ストリームを取り出す工程と、を有する酢酸を製造するためのカルボニル化処理方法であって、
前記より精製された生成物ストリームを生成させる工程では、
(i)前記軽留塔の前記蒸留域の前記上部からのオーバーヘッドの蒸気を凝縮させる工程と、
(ii)凝縮されたオーバーヘッドの蒸気の少なくとも一部を、液体として、前記軽留塔の前記蒸留域に還流する工程と、
(iii)前記軽留塔の前記蒸留域の前記中部からの蒸気を凝縮させる工程と、を含むことを特徴とする酢酸を製造するためのカルボニル化処理方法。 - 前記より精製された生成物ストリームを、水の除去を含むさらなる精製へと給出する工程、をさらに含む請求項1に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記より精製された生成物ストリームは、質量フローレートRで前記軽留塔から取り出され、前記軽留塔の前記中部からの蒸気は、0.05R〜0.5Rの比率で凝縮される、請求項1に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記より精製された生成物ストリームは、質量フローレートRで前記軽留塔から取り出され、前記軽留塔の前記中部からの蒸気は、0.1R以上の比率で凝縮される、請求項1に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記より精製された生成物ストリームは、質量フローレートRで前記軽留塔から取り出され、前記軽留塔の前記中部からの蒸気は、0.2R以上の比率で凝縮される、請求項1に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記より精製された生成物ストリームは、質量フローレートRで前記軽留塔から取り出され、前記軽留塔の前記中部からの蒸気は、0.3R以上の比率で凝縮される、請求項1に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記粗生成物ストリームは、高温の蒸気として、前記軽留塔の前記下部に供給される、請求項1に記載の酢酸を製造するためのカルボニル化処理方法。
- (a)水と、ロジウム触媒、イリジウム触媒およびこれらの混合物から選択される触媒と、ヨウ化メチルとの存在下、メタノールをカルボニル化して、反応器中で酢酸反応混合物を生成させる工程と、
(b)前記酢酸反応混合物のストリームを、液体として再利用されるストリームと、酢酸、ヨウ化メチル、酢酸メチルおよび水を含む粗生成物ストリームとに分ける工程と、
(c)前記粗生成物ストリームを、上部と、下部と、生成物側部取り出し口が設けられた中部とを有する蒸留域を備えた軽留塔に供給する工程と、
(d)前記軽留塔の前記蒸留域内の前記粗生成物ストリームから、ヨウ化メチルおよび酢酸メチルを除去して、前記粗生成物ストリームよりも低濃度のヨウ化メチルおよび酢酸メチルを含み、より精製された生成物ストリームを生成させる工程と、
(e)前記軽留塔の前記側部取り出し口から、前記より精製された生成物ストリームを取り出す工程と、を有する酢酸を製造するためのカルボニル化処理方法であって、
前記より精製された生成物ストリームを生成させる工程では、
(i)前記軽留塔の前記蒸留域の前記上部からのオーバーヘッドの蒸気を、第一凝縮器で凝縮させる工程と、
(ii)凝縮されたオーバーヘッドの蒸気の少なくとも一部を、液体として、前記軽留塔の前記蒸留域に還流する工程と、
(iii)前記軽留塔の前記蒸留域の前記中部からの蒸気を、第二凝縮器で凝縮させる工程と、を含むことを特徴とする酢酸を製造するためのカルボニル化処理方法。 - 前記軽留塔の相対的な蒸気量QRは、同一の軽留塔で同一の条件下で前記第二凝縮器がない場合に比べて、0.75〜0.95倍である、請求項8に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記軽留塔の相対的な蒸気量QRは、同一の軽留塔で同一の条件下で前記第二凝縮器がない場合に比べて、0.9倍以下である、請求項8に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記第二凝縮器は、前記軽留塔の外部側方に設けられている、請求項8に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記第二凝縮器は、前記軽留塔の内部に設けられている、請求項8に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記第二凝縮器により凝縮される蒸気は、前記軽留塔の前記蒸留域の前記生成物側部取り出し口より高い位置に由来する、請求項8に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記第二凝縮器により凝縮された蒸気は、前記軽留塔の前記蒸留域に、液体として還流される、請求項8に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記第二凝縮器により凝縮された蒸気は、前記より精製された生成物ストリームと組み合わされ、さらなる精製へと給出される請求項8に記載の酢酸を製造するためのカルボニル化処理方法。
- 前記より精製された生成物ストリーム中のヨウ化メチルおよび酢酸メチルの濃度は、前記第二凝縮器がない状態で同一の条件下で同一の軽留塔から取り出されたより精製された生成物ストリームのヨウ化メチルおよび酢酸メチルの濃度と、同じである請求項8に記載の酢酸を製造するためのカルボニル化処理方法。
- (a)水と、ロジウム触媒、イリジウム触媒およびこれらの混合物から選択される触媒と、ヨウ化メチルとの存在下、メタノールをカルボニル化して、酢酸反応混合物を生成させるように構成された反応器と、
(b)前記反応器に接続され、前記反応混合物のストリームを受け取るように構成され、かつ、前記反応混合物を、(i)液体として再利用されるストリームと、(ii)酢酸を含む粗生成物ストリームとに分けるように構成された気化器と、
(c)前記気化器に接続され、前記粗生成物ストリームから低沸点成分を分離して、より精製された生成物ストリームを生成するように構成され、上部と、下部と、生成物側部取り出し口が設けられた中部とを有する蒸留域を備え、さらに底部に前記粗生成物ストリームの残余物を排出する排出口を備えた軽留塔と、
(d)前記軽留塔の前記蒸留域の前記上部に接続され、該上部のオーバーヘッド蒸気を凝縮するように構成され、かつ、凝縮されたオーバーヘッド蒸気の少なくとも一部を、液体として前記軽留塔の前記蒸留域に還流するように構成された第一凝縮器と、
(e)前記軽留塔の前記蒸留域の前記中部の前記生成物側部取り出し口よりも高い位置に接続され、該位置から給入した蒸気を凝縮するように構成され、かつ前記軽留塔の前記中部の前記蒸気を給入した位置よりも高い位置に前記凝縮した蒸気を液体として還流するように構成された第二凝縮器と、
(f)前記軽留塔の前記生成物側部取り出し口に接続され、前記より精製された生成物ストリームを受け取り、水を含む該生成物ストリームをさらに精製するように構成された脱水塔と、を有することを特徴とする酢酸製造装置。 - 前記第二凝縮器は、前記軽留塔の外部側方に設けられている、請求項17に記載の酢酸製造装置。
- 前記第二凝縮器は、前記軽留塔の内部に設けられている、請求項17に記載の酢酸製造装置。
- 前記第二凝縮器は、給入口を、前記生成物側部取り出し口より高い位置に有する、請求項18に記載の酢酸製造装置。
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