CN100432039C - Method for protective preparation of acidic ion exchange resin catalyst for lower fatty acid ester - Google Patents
Method for protective preparation of acidic ion exchange resin catalyst for lower fatty acid ester Download PDFInfo
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- CN100432039C CN100432039C CNB200710201053XA CN200710201053A CN100432039C CN 100432039 C CN100432039 C CN 100432039C CN B200710201053X A CNB200710201053X A CN B200710201053XA CN 200710201053 A CN200710201053 A CN 200710201053A CN 100432039 C CN100432039 C CN 100432039C
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- reaction
- exchange resin
- ion exchange
- acid
- alkene
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- 239000003054 catalyst Substances 0.000 title claims abstract description 31
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000003456 ion exchange resin Substances 0.000 title claims abstract description 27
- 229920003303 ion-exchange polymer Polymers 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 19
- 235000014113 dietary fatty acids Nutrition 0.000 title claims abstract description 11
- 229930195729 fatty acid Natural products 0.000 title claims abstract description 11
- 239000000194 fatty acid Substances 0.000 title claims abstract description 11
- -1 fatty acid ester Chemical class 0.000 title claims abstract description 9
- 230000002378 acidificating effect Effects 0.000 title claims description 7
- 230000001681 protective effect Effects 0.000 title description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 150000001336 alkenes Chemical class 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims abstract description 19
- 238000005406 washing Methods 0.000 claims abstract description 17
- 239000000376 reactant Substances 0.000 claims abstract description 9
- 239000003053 toxin Substances 0.000 claims abstract description 7
- 231100000765 toxin Toxicity 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 20
- 229930195733 hydrocarbon Natural products 0.000 claims description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims description 12
- 150000002632 lipids Chemical class 0.000 claims description 11
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 7
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 7
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 7
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 claims description 6
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 claims description 5
- 230000001627 detrimental effect Effects 0.000 claims description 5
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- KQNPFQTWMSNSAP-UHFFFAOYSA-N isobutyric acid Chemical compound CC(C)C(O)=O KQNPFQTWMSNSAP-UHFFFAOYSA-N 0.000 claims description 2
- QMMOXUPEWRXHJS-UHFFFAOYSA-N pent-2-ene Chemical group CCC=CC QMMOXUPEWRXHJS-UHFFFAOYSA-N 0.000 claims description 2
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical group CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 claims description 2
- 235000019260 propionic acid Nutrition 0.000 claims description 2
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 4
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 abstract description 3
- 231100000572 poisoning Toxicity 0.000 abstract description 3
- 230000000607 poisoning effect Effects 0.000 abstract description 3
- 150000004665 fatty acids Chemical class 0.000 abstract description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 12
- 230000009467 reduction Effects 0.000 description 9
- 230000009849 deactivation Effects 0.000 description 8
- 229910021645 metal ion Inorganic materials 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- MYRTYDVEIRVNKP-UHFFFAOYSA-N divinylbenzene Substances C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000003822 preparative gas chromatography Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 208000012839 conversion disease Diseases 0.000 description 3
- 150000001993 dienes Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 150000001721 carbon Chemical group 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical class OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 1
- FEPBITJSIHRMRT-UHFFFAOYSA-N 4-hydroxybenzenesulfonic acid Chemical compound OC1=CC=C(S(O)(=O)=O)C=C1 FEPBITJSIHRMRT-UHFFFAOYSA-N 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- JMMWKPVZQRWMSS-UHFFFAOYSA-N isopropanol acetate Natural products CC(C)OC(C)=O JMMWKPVZQRWMSS-UHFFFAOYSA-N 0.000 description 1
- 229940011051 isopropyl acetate Drugs 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-N isovaleric acid Chemical compound CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
- B01J31/08—Ion-exchange resins
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/04—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides onto unsaturated carbon-to-carbon bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention provides method of protecting acid ion exchange resin catalyst for preparing lower fatty acid ester. The method includes water washing reactant C2-C5 olefin to eliminate partial catalyst toxin and passing reactant C1-C4 fatty acid and/or reactant C2-C5 olefin through one pre-treater with reaction assistant to eliminate harmful impurity before the reactants enter to the reactor. The method can prevent catalyst poisoning, maintain the catalyst activity for over 6 months, and maintain the reaction assistant bed without punch through and obvious pressure difference change.
Description
Technical field
The present invention relates to a kind of protection and prepare the acidic ion exchange resin catalyst for lower fatty acid ester method.In particular to a kind of method of protecting C1-C4 lipid acid and C2-C5 alkene prepared in reaction acidic ion exchange resin catalyst for lower fatty acid ester in liquid phase.
Background technology
Utilize ion exchange resin to make catalyzer, catalysis lower fatty acid and the synthetic low-grade fatty acid ester of low-carbon alkene reaction generally all have reaction effect preferably.But the chemical stability of most of ion-exchange resin catalysts and thermostability are not high, and swelling or loss of active component easily take place life-time service, and then cause catalyst deactivation.
CN1483717 discloses and has utilized modified resin to make catalyzer, and catalysis acetate and propylene reaction under gas-liquid-solid three-phase condition overcomes and solved side reaction that prior art exists and reaches waste reaction solution more and be difficult to problems such as processing.But because it is reflected under the gas-liquid-solid three-phase condition and carries out, after the propylene reaction in being dissolved in acetate, the propylene of gas phase dissolving earlier enters in the liquid phase, just can proceed reaction, so reaction efficiency is lower.
US5457228 discloses and has utilized styrene sulfonic acid class ion exchange resin or sulfocarbolic acid resinoid to make catalyzer, and catalysis acetate and propylene generate isopropyl acetate, or acetate and 1-butylene, 2-butylene prepared in reaction sec-butyl acetate.The characteristics of this technology are that the mode of employing tubular fixed-bed reactor and reaction mass mixed cycle has effectively been controlled temperature of reaction, has avoided catalytic erosion, has slowed down catalyst deactivation, has suppressed the generation of reversed reaction speed and olefinic polymerization side reaction.
But according to being familiar with the knowledge that this professional personnel grasp, may contain little metal ion, alkaline matter and S-contained substance as the organic carboxyl acid and the chain alkene of raw material, these materials can be adsorbed on the ion exchange resin, and cause catalyst deactivation.When used alkene is hydrocarbon mixture, as when being hybrid C 4, diene in the hybrid C 4 and iso-butylene are easy to take place coking, thereby cause catalyst deactivation.
Therefore, utilizing ion exchange resin to make catalyzer, when carrying out the esterification of organic carboxyl acid and chain alkene, need carry out pre-treatment, removing the catalyzer toxin and may cause the factor of catalyst deactivation, thereby prolonging catalyzer work-ing life reaction raw materials.
The applicant discloses a kind of before reaction in application number is the patent of CN 2007102001475, utilizes amberlite lipid protective material that reaction raw materials is carried out pre-treatment, prolongs the catalyzer method in work-ing life thereby reach.This method is the protective reaction catalyzer effectively, prolongs its catalytic activity, but because protectant exchange capacity is limited, when the catalyzer toxin was more in the reaction raw materials, protective material also was subject to the murder by poisoning of catalyzer toxin and loses protective value gradually.When used alkene is hydrocarbon mixture, as when being hybrid C 4, contain little metal ion, alkaline matter, S-contained substance and greasy filth in the hybrid C 4.Metal ion, alkaline matter, S-contained substance are catalyzer poisons, and greasy filth then can cause catalyst deactivation attached to catalyst surface.
Summary of the invention
The purpose of this invention is to provide and a kind ofly prepare in the process of low-grade fatty acid ester the method for protection acidic ion exchange resin catalyst at C1-C4 lipid acid and C2-C5 olefine reaction.
Purpose of the present invention is achieved through the following technical solutions: before reactant advances reactor, earlier C2-C5 alkene is washed removing the part catalyzer toxin in the alkene, and reactant C1-C4 lipid acid and C2-C5 alkene or wherein a kind of are removed detrimental impurity through a pretreater that reaction promoter is housed.
C1-C4 lipid acid is the lipid acid of 1～4 carbon atom, and the lipid acid of 1～4 carbon atom can be formic acid, acetate, propionic acid, butanic acid, isopropylformic acid, vinylformic acid, wherein preferred acetate.
C2-C5 alkene can be ethene, propylene, 1-butylene, 2-butylene, iso-butylene, 1-amylene or 2-amylene, preferred propylene, 1-butylene, 2-butylene.
In the reaction that utilizes C1-C4 lipid acid and C2-C5 olefin production low-grade fatty acid ester, sometimes alkene contains metal ion, alkaline matter and S-contained substance, and these metal ions, alkaline matter and S-contained substance can cause the acidic ion exchange resin catalyst inactivation.When used alkene is hydrocarbon mixture, as when being hybrid C 4, also contain greasy filth in the hybrid C 4, these greasy filth can cause catalyst deactivation attached to catalyst surface.By washing, can wash above-mentioned catalyzer toxin of part and greasy filth off, thereby play the purpose of guard catalyst.
The mass flux ratio that the flow of washing water should be controlled to be water and hydrocarbons is 0～10, is preferably 0～3.Generally speaking, the mass flux ratio of water and hydrocarbons increases, and water washing effect is better, but when the mass flux ratio of water and hydrocarbons greater than 10, then the water yield of Xiao Haoing is too big, operates uneconomical.Washing water also can be statically placed in water wash column or water washing tank or the washing bath, and at this moment, the mass rate of washing water is 0, and hydrocarbons passes through the washing water layer, thereby reaches water washing effect.
Because water can impact reaction and catalyzer, therefore, need take required measure moisture less to guarantee in the hydrocarbon of washing back.The dewatering that the technician adopted of being familiar with the industry all can be used as the optional dewatering means of present method, adds the water bag as water washing tank/groove or hydrocarbon tundish thereafter, or after the washing, with the coalescer that coalescent filter core be housed of hydrocarbons by dehydration etc.
Reactant C1-C4 lipid acid and C2-C5 alkene or wherein a kind of are removed detrimental impurity through a pretreater that reaction promoter is housed.
Reaction promoter in the pretreater is an ion exchange resin, and its exchange capacity need not be controlled especially, but generally should not be less than 3mmol/gH, and the example of alternative ion exchange resin has: S54 type ion exchange resin, D72 type ion exchange resin.
Use the purpose of reaction promoter to mainly contain 3 points: the one, remove the metal ion that contains in the reaction raw materials; The 2nd, alkaline matter in the reaction raw materials and S-contained substance are absorbed; The 3rd, when used alkene is hybrid C 4, diene in the hybrid C 4 and iso-butylene and organic carboxyl acid is at first reacted, thereby avoid in reactor, taking place coking.
The temperature of pretreater is 20～80 ℃, its objective is guaranteeing under the unobstructed condition of logistics the detrimental impurity in the material fully to be absorbed; Diene in the hybrid C 4 and iso-butylene and organic carboxyl acid are reacted.
The present invention has following technique effect: detrimental impurity was removed before material entered reactor; can prevent poisoning of catalyst; catalyzer uses does not have deactivation phenomenom more than 6 months; and the reaction promoter that plays the catalyst protection effect does not have metal ion to wear the filter phenomenon, and the front and back pressure reduction of reaction promoter bed changes little.
Embodiment
The present invention is further illustrated by the following examples, but content not thereby limiting the invention.
In an embodiment: acetate purity 〉=99.5%; Hybrid C 4 is formed: 1-butylene 4.72%, 2-butylene 49.22%, butane 46.01%, iso-butylene 0.05%.
Embodiment 1: the employing specific surface area is 30m
2/ g, pore volume are 0.25ml/g, and granularity is that the strong-acid ion exchange resin of 1.0mm is made catalyzer.With total amount is that the catalyzer of 3.5t is packed into and split in the tubular reactor.Vinylbenzene-divinylbenzene polymerization bead is then loaded at the two ends of catalyst layer.
Is that 5 speed feeds water wash column with de-salted water and hybrid C 4 with mass flux ratio.
Hybrid C 4 after washing and acetate feed the pretreater that D72 type ion exchange resin is housed, and the mol ratio of butylene in acetate and the hybrid C 4 (sour alkene ratio) is 1.3, and feeding manner is a liquid phase feeding.The temperature out of pretreater is 70 ℃.
Will be through pretreated acetate and hybrid C 4 from the continuous input reactor of reactor bottom, the acetic acid feed air speed is 1.0hr
-1, reaction pressure is 1.6MPa, temperature of reaction is 110 ℃.
Every 8hr sampling analysis reaction product is formed, and analyzes and adopts vapor-phase chromatography.Recording the sec-butyl acetate selectivity reaches more than 98%.Initial reaction stage, Fe, Cr, Ni ionic concn are all less than 0.01 μ g/g in the pretreater afterreaction medium, and pressure reduction is less than 0.1MPa before and after the reaction promoter bed.Move 6 months, catalyst activity is stable, and considerable change does not appear in reaction conversion ratio and selectivity, and Fe, Cr, Ni ionic concn are all less than 0.01 μ g/g in the pretreater afterreaction medium, and pressure reduction is less than 0.1MPa before and after the reaction promoter bed.
The comparative example 1: the employing specific surface area is 30m
2/ g, pore volume are 0.25ml/g, and granularity is that the strong-acid ion exchange resin of 1.0mm is made catalyzer.With total amount is that the catalyzer of 3.5t is packed into and split in the tubular reactor.Vinylbenzene-divinylbenzene polymerization bead is then loaded at the two ends of catalyst layer.
Hybrid C 4 and acetate are fed the pretreater that D72 type ion exchange resin is housed, and the mol ratio of butylene in acetate and the hybrid C 4 (sour alkene ratio) is 1.3, and feeding manner is a liquid phase feeding.The temperature out of pretreater is 70 ℃.
Will be through pretreated acetate and hybrid C 4 from the continuous input reactor of reactor bottom, the acetic acid feed air speed is 1.0hr
-1, reaction pressure is 1.6MPa, temperature of reaction is 110 ℃.
Every 8hr sampling analysis reaction product is formed, and analyzes and adopts vapor-phase chromatography.Recording the sec-butyl acetate selectivity reaches more than 98%.Initial reaction stage, Fe, Cr, Ni ionic concn are all less than 0.01 μ g/g in the pretreater afterreaction medium, and pressure reduction is less than 0.1MPa before and after the reaction promoter bed.Move after 1 month, pressure reduction begins slightly to increase before and after the reaction promoter bed.Move after 4 months, the Fe ionic concn reaches 9.6 μ g/g in the pretreater afterreaction medium, and pressure reduction reaches 0.4MPa before and after the reaction promoter bed.
Embodiment 2: the employing specific surface area is 30m
2/ g, pore volume are 0.25ml/g, and granularity is that the strong-acid ion exchange resin of 1.0mm is made catalyzer.With total amount is that the catalyzer of 3.5t is packed into and split in the tubular reactor.Vinylbenzene-divinylbenzene polymerization bead is then loaded at the two ends of catalyst layer.
Is that 5 speed feeds water wash column with de-salted water and hybrid C 4 with mass flux ratio.Acetate is fed the pretreater that D72 type ion exchange resin is housed, and the temperature out of pretreater is 70 ℃.
Will be after pretreated acetate and hybrid C 4 mixing, from the continuous input reactor of reactor bottom, the mol ratio of butylene in acetate and the hybrid C 4 (sour alkene ratio) is 1.3, feeding manner is a liquid phase feeding.The acetic acid feed air speed is 1.0hr
-1, reaction pressure is 1.6MPa, temperature of reaction is 110 ℃.
Every 8hr sampling analysis reaction product is formed, and analyzes and adopts vapor-phase chromatography.Recording the sec-butyl acetate selectivity reaches more than 98%.Initial reaction stage, Fe, Cr, Ni ionic concn are all less than 0.01 μ g/g in the pretreater afterreaction medium, and pressure reduction is less than 0.1MPa before and after the reaction promoter bed.Move 3 months, catalyst activity is stable, and considerable change does not appear in reaction conversion ratio and selectivity, and Fe, Cr, Ni ionic concn are all less than 0.01 μ g/g in the pretreater afterreaction medium, and pressure reduction is less than 0.1MPa before and after the reaction promoter bed.
Embodiment 3: the employing specific surface area is 30m
2/ g, pore volume are 0.25ml/g, and granularity is that the strong-acid ion exchange resin of 1.0mm is made catalyzer.With total amount is that the catalyzer of 3.5t is packed into and split in the tubular reactor.Vinylbenzene-divinylbenzene polymerization bead is then loaded at the two ends of catalyst layer.
Hybrid C 4 is fed the water washing tank that de-salted water is housed.Acetate is fed the pretreater that D72 type ion exchange resin is housed, and the temperature out of pretreater is 70 ℃.
After acetate and hybrid C 4 mixing, from the continuous input reactor of reactor bottom, the mol ratio of butylene in acetate and the hybrid C 4 (sour alkene ratio) is 1.3, and feeding manner is a liquid phase feeding.The acetic acid feed air speed is 1.0hr
-1, reaction pressure is 1.6MPa, temperature of reaction is 110 ℃.
Every 8hr sampling analysis reaction product is formed, and analyzes and adopts vapor-phase chromatography.Recording the sec-butyl acetate selectivity reaches more than 98%.Move 80 days, catalyst activity is stable, and considerable change does not appear in reaction conversion ratio and selectivity.Fe, Cr, Ni ionic concn are all less than 0.01 μ g/g in the pretreater afterreaction medium, and pressure reduction is less than 0.1MPa before and after the reaction promoter bed.
Claims (6)
1. a protection prepares the acidic ion exchange resin catalyst for lower fatty acid ester method; it is characterized in that: before reactant advances reactor; earlier C2-C5 alkene is washed to remove the part catalyzer toxin in the alkene; and reactant C1-C4 lipid acid and C2-C5 alkene or wherein a kind of removed detrimental impurity through a pretreater that reaction promoter is housed, described reaction promoter is an ion exchange resin.
2. method according to claim 1 is characterized in that C1-C4 lipid acid is selected from formic acid, acetate, propionic acid, butanic acid, isopropylformic acid, vinylformic acid.
3. method according to claim 1 is characterized in that C2-C5 alkene is ethene, propylene, 1-butylene, 2-butylene, iso-butylene, 1-amylene or 2-amylene.
4. according to claim 1 or 2 or 3 described methods, the flow control that it is characterized in that washing water is that the mass flux ratio of water and hydrocarbons is 0～10.
5. according to claim 1 or 2 or 3 described methods, the flow control that it is characterized in that washing water is that the mass flux ratio of water and hydrocarbons is 0～3.
6. according to claim 1 or 2 or 3 described methods, the temperature of reaction that it is characterized in that pretreater is 20～80 ℃; The exchange capacity of ion exchange resin is not less than 3mmol/gH.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710201053XA CN100432039C (en) | 2007-07-11 | 2007-07-11 | Method for protective preparation of acidic ion exchange resin catalyst for lower fatty acid ester |
| PCT/CN2008/071388 WO2009006815A1 (en) | 2007-07-11 | 2008-06-20 | A method of protecting catalyst used for preparing low fatty ester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710201053XA CN100432039C (en) | 2007-07-11 | 2007-07-11 | Method for protective preparation of acidic ion exchange resin catalyst for lower fatty acid ester |
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| Publication Number | Publication Date |
|---|---|
| CN101081812A CN101081812A (en) | 2007-12-05 |
| CN100432039C true CN100432039C (en) | 2008-11-12 |
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| CNB200710201053XA Ceased CN100432039C (en) | 2007-07-11 | 2007-07-11 | Method for protective preparation of acidic ion exchange resin catalyst for lower fatty acid ester |
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| Country | Link |
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| CN (1) | CN100432039C (en) |
| WO (1) | WO2009006815A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432039C (en) * | 2007-07-11 | 2008-11-12 | 胡先念 | Method for protective preparation of acidic ion exchange resin catalyst for lower fatty acid ester |
| CN101560152B (en) * | 2009-05-27 | 2012-05-23 | 南京工业大学 | A kind of method of synthetic propionate |
| CN112745897A (en) * | 2019-10-30 | 2021-05-04 | 中国石油化工股份有限公司 | Isobutene superposition method for improving catalyst utilization rate |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0483826B1 (en) * | 1990-10-31 | 1996-03-13 | Nippon Petrochemicals Company, Limited | Method for producing lower alkyl acetate |
| US5384426A (en) * | 1992-12-08 | 1995-01-24 | Daicel Chemical Industries, Ltd. | Process for the preparation of isopropyl acetate |
| GB9815135D0 (en) * | 1998-07-14 | 1998-09-09 | Bp Chem Int Ltd | Ester synthesis |
| CN1260203C (en) * | 2003-06-13 | 2006-06-21 | 华南理工大学 | Process for synthesizing isopropyl acetate and method for preparing its catalyst |
| CN100432039C (en) * | 2007-07-11 | 2008-11-12 | 胡先念 | Method for protective preparation of acidic ion exchange resin catalyst for lower fatty acid ester |
-
2007
- 2007-07-11 CN CNB200710201053XA patent/CN100432039C/en not_active Ceased
-
2008
- 2008-06-20 WO PCT/CN2008/071388 patent/WO2009006815A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN101081812A (en) | 2007-12-05 |
| WO2009006815A1 (en) | 2009-01-15 |
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