JP2015526466A - 酢酸製造プロセスから過マンガン酸塩還元性化合物を回収する方法 - Google Patents
酢酸製造プロセスから過マンガン酸塩還元性化合物を回収する方法 Download PDFInfo
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 title claims abstract description 180
- 238000000034 method Methods 0.000 title claims abstract description 66
- 150000001875 compounds Chemical class 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 238000005810 carbonylation reaction Methods 0.000 claims abstract description 27
- 230000006315 carbonylation Effects 0.000 claims abstract description 23
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 claims description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 238000004821 distillation Methods 0.000 claims description 41
- 239000000203 mixture Substances 0.000 claims description 40
- 239000000047 product Substances 0.000 claims description 33
- 238000000895 extractive distillation Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 22
- 238000000605 extraction Methods 0.000 claims description 21
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 19
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 19
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 18
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 16
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 claims description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 9
- 150000001351 alkyl iodides Chemical class 0.000 claims description 8
- IQGZCSXWIRBTRW-ZZXKWVIFSA-N (2E)-2-ethyl-2-butenal Chemical compound CC\C(=C/C)C=O IQGZCSXWIRBTRW-ZZXKWVIFSA-N 0.000 claims description 6
- UNNGUFMVYQJGTD-UHFFFAOYSA-N 2-Ethylbutanal Chemical compound CCC(CC)C=O UNNGUFMVYQJGTD-UHFFFAOYSA-N 0.000 claims description 6
- 238000005882 aldol condensation reaction Methods 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 6
- 239000007859 condensation product Substances 0.000 claims description 6
- MLUCVPSAIODCQM-NSCUHMNNSA-N crotonaldehyde Chemical compound C\C=C\C=O MLUCVPSAIODCQM-NSCUHMNNSA-N 0.000 claims description 6
- MLUCVPSAIODCQM-UHFFFAOYSA-N crotonaldehyde Natural products CC=CC=O MLUCVPSAIODCQM-UHFFFAOYSA-N 0.000 claims description 6
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 4
- ANOOTOPTCJRUPK-UHFFFAOYSA-N 1-iodohexane Chemical compound CCCCCCI ANOOTOPTCJRUPK-UHFFFAOYSA-N 0.000 claims description 3
- BLXSFCHWMBESKV-UHFFFAOYSA-N 1-iodopentane Chemical compound CCCCCI BLXSFCHWMBESKV-UHFFFAOYSA-N 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 3
- KMGBZBJJOKUPIA-UHFFFAOYSA-N butyl iodide Chemical compound CCCCI KMGBZBJJOKUPIA-UHFFFAOYSA-N 0.000 claims description 3
- HVTICUPFWKNHNG-UHFFFAOYSA-N iodoethane Chemical compound CCI HVTICUPFWKNHNG-UHFFFAOYSA-N 0.000 claims description 3
- PVWOIHVRPOBWPI-UHFFFAOYSA-N n-propyl iodide Chemical compound CCCI PVWOIHVRPOBWPI-UHFFFAOYSA-N 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 230000002051 biphasic effect Effects 0.000 claims 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract description 57
- 150000001350 alkyl halides Chemical class 0.000 abstract description 35
- 239000003054 catalyst Substances 0.000 abstract description 24
- 229910052736 halogen Inorganic materials 0.000 description 26
- 150000002367 halogens Chemical class 0.000 description 26
- 238000006243 chemical reaction Methods 0.000 description 19
- 239000012071 phase Substances 0.000 description 16
- 239000012535 impurity Substances 0.000 description 15
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 14
- 238000011084 recovery Methods 0.000 description 13
- 229910052741 iridium Inorganic materials 0.000 description 11
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 10
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 10
- 238000000746 purification Methods 0.000 description 9
- 239000010948 rhodium Substances 0.000 description 8
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 7
- 239000012429 reaction media Substances 0.000 description 7
- 229910052703 rhodium Inorganic materials 0.000 description 7
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 7
- -1 Platinum Metals Chemical class 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000010926 purge Methods 0.000 description 6
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 5
- 238000000622 liquid--liquid extraction Methods 0.000 description 5
- 238000000638 solvent extraction Methods 0.000 description 5
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Chemical group [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 150000001728 carbonyl compounds Chemical class 0.000 description 2
- 238000010960 commercial process Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- XIXADJRWDQXREU-UHFFFAOYSA-M lithium acetate Chemical compound [Li+].CC([O-])=O XIXADJRWDQXREU-UHFFFAOYSA-M 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
- 239000002243 precursor Substances 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 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
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 241000183024 Populus tremula Species 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
- WDJHALXBUFZDSR-UHFFFAOYSA-M acetoacetate Chemical compound CC(=O)CC([O-])=O WDJHALXBUFZDSR-UHFFFAOYSA-M 0.000 description 1
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Chemical class 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 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
- 150000001412 amines Chemical class 0.000 description 1
- 150000001450 anions Chemical class 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
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000005587 bubbling Effects 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007810 chemical reaction solvent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- DQYBDCGIPTYXML-UHFFFAOYSA-N ethoxyethane;hydrate Chemical compound O.CCOCC DQYBDCGIPTYXML-UHFFFAOYSA-N 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229940071870 hydroiodic acid Drugs 0.000 description 1
- 238000011065 in-situ storage Methods 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
- 150000004694 iodide salts Chemical class 0.000 description 1
- 150000002497 iodine compounds Chemical class 0.000 description 1
- 150000002504 iridium compounds 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
- 230000004048 modification Effects 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000005527 organic iodine compounds Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- 238000010992 reflux Methods 0.000 description 1
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- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
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- 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
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- 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
-
- 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
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
[0002]本発明は酢酸の製造方法に関する。具体的には、本発明は、カルボニル化触媒の存在下でメタノールをカルボニル化して酢酸を製造する際に形成される過マンガン酸塩還元性化合物(permanganate reducing compound, PRC)を回収するための改良された方法に関する。より具体的には、これは、回収されるPRCからヨウ化メチルのようなアルキルハロゲン化物を取り出すための改良された方法に関する。
[0067]残渣136は回収カラム148に送って、ライン150内の精製PRC生成物流、及び抽出剤を含む第2の残渣流152を生成させる。第2の残渣流152は、抽出蒸留カラム124’に直接再循環することができ、或いは好ましくは抽出剤供給流146と混合して抽出蒸留カラム124’に供給する。
[0072]ASPEN(登録商標)ソフトウエアを用いて、図2の態様によるプロセスのシミュレーションを行った。シミュレーションは、上記で議論した水性供給流142を用いた。水を含む抽出剤を、水性供給流の供給点の上方に供給した。抽出蒸留カラム124’及び回収カラム148の種々の流れの組成を表2に示す。
Claims (15)
- 粗酢酸組成物から過マンガン酸塩還元性化合物(PRC)を回収する方法であって、
軽質留分カラム内において、粗酢酸組成物を、ヨウ化メチル、水、酢酸メチル、及び少なくとも1種類のPRCを含む塔頂流と、酢酸生成物流とに分離し;
第1の蒸留カラムを用いて、塔頂流の一部を分離して少なくとも1種類のPRCが富化された流れを得て、ここで当該富化流は塔頂流からのヨウ化メチルの少なくとも一部を更に含み;そして
第2の蒸留カラム内において、当該富化流の一部を分離して、ヨウ化メチルを含む留出物と、少なくとも1種類のPRC、及び場合によっては1重量%未満のヨウ化メチルを含む残渣とを得て、ここで残渣におけるヨウ化メチル/PRCの比は当該富化流におけるヨウ化メチル/PRCの比よりも小さく、ここで、第2の蒸留カラム内において、場合によっては水、グリコール、グリセロール、高沸点アルコール、及びこれらの混合物からなる群から選択される抽出剤を場合によって用いて、少なくとも1種類のPRCを残渣中に抽出する;
工程を含む、前記方法。 - 当該富化流の一部と抽出剤との質量流量比が少なくとも0.01:1である、請求項1に記載の方法。
- 残渣から抽出剤を回収して含水量が減少したPRC生成物を得て、及び/又は留出物の少なくとも一部を、粗酢酸組成物を製造するためのカルボニル化区域に戻すことを更に含む、請求項1に記載の方法。
- 留出物が、相対質量流量を基準として当該富化流よりも少ない少なくとも1種類のPRCを含む、請求項1に記載の方法。
- 塔頂流が、ヨウ化エチル、ヨウ化プロピル、ヨウ化ブチル、ヨウ化ペンチル、ヨウ化ヘキシル、並びにこれらの異性体及び混合物からなる群から選択される少なくとも1種類のアルキルヨウ化物を更に含む、請求項1に記載の方法。
- 当該富化流の一部中のヨウ化メチルの少なくとも80%が留出物中に分離され、及び/又は当該富化流の一部中の少なくとも1種類のPRCの少なくとも80%が残渣中に分離される、請求項1に記載の方法。
- 少なくとも1種類のPRCが、アセトアルデヒド、アセトン、メチルエチルケトン、ブチルアルデヒド、クロトンアルデヒド、2−エチルクロトンアルデヒド、2−エチルブチルアルデヒド、これらのアルドール縮合生成物、及びこれらの混合物からなる群から選択される、請求項1に記載の方法。
- 当該富化流の一部の分離が、液−液抽出器内において好ましくは水を含む抽出溶媒を用いて当該富化流を抽出して、PRC流と、ヨウ化メチルを含むラフィネートとを得ることを含み、ここでPRC流は少なくとも1種類のPRC及び0.01〜5重量%のヨウ化メチルを含む、請求項1に記載の方法。
- 塔頂流を凝縮し、重質相及び軽質相に二相分離することを更に含む、請求項1に記載の方法。
- 1以上の蒸留カラム内において、軽質相を分離して当該富化流を得ることを更に含む、請求項9に記載の方法。
- 1以上の蒸留カラム内において、重質相を分離して当該富化流を得ることを更に含む、請求項9に記載の方法。
- 粗酢酸組成物から過マンガン酸塩還元性化合物(PRC)を回収する方法であって、
軽質留分カラム内において、粗酢酸組成物を、ヨウ化メチル、水、酢酸メチル、及び少なくとも1種類のPRCを含む塔頂流と、酢酸生成物流とに分離し;
1以上の蒸留カラムを用いて、塔頂流の一部を分離して少なくとも1種類のPRCが富化された流れを得て、ここで当該富化流は塔頂流からのヨウ化メチルの少なくとも一部を更に含み;
液−液抽出器内において、抽出溶媒を用いて当該富化流を抽出して、PRC流と、ヨウ化メチルを含むラフィネートとを得て、ここでPRC流は少なくとも1種類のPRC及び0.01〜5重量%のヨウ化メチルを含み;そして
抽出蒸留カラム内において、抽出剤を用いてPRC流の一部を分離して、ヨウ化メチルを含む留出物と、少なくとも1種類のPRC及び抽出剤を含む残渣とを得て、ここで残渣におけるヨウ化メチル/PRCの比はPRC流におけるヨウ化メチル/PRCの比よりも小さい;
工程を含む、前記方法。 - 塔頂流を凝縮し、重質相及び軽質相に二相分離することを更に含む、請求項12に記載の方法。
- 1以上の蒸留カラム内において、軽質相を分離して当該富化流を得ることを更に含む、請求項13に記載の方法。
- 1以上の蒸留カラム内において、重質相を分離して当該富化流を得ることを更に含む、請求項13に記載の方法。
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