CN105057002B - A kind of acetylene ethene liquid-phase catalyst and preparation method thereof - Google Patents

A kind of acetylene ethene liquid-phase catalyst and preparation method thereof Download PDF

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CN105057002B
CN105057002B CN201510484974.6A CN201510484974A CN105057002B CN 105057002 B CN105057002 B CN 105057002B CN 201510484974 A CN201510484974 A CN 201510484974A CN 105057002 B CN105057002 B CN 105057002B
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phase catalyst
metal ion
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catalyst
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CN105057002A (en
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闫琛洋
杜少春
吴道洪
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Beijing Jintai Chengrui Technology Development Co., Ltd
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Beijing Huafu Engineering Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

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Abstract

The present invention relates to a kind of liquid-phase catalyst for producing ethylene with acetylene hydrogenation, the liquid-phase catalyst includes metal ion, complexing agent, stabilizer and alkaline aqueous solution.Liquid-phase catalyst provided by the invention can be dissolved each other with liquid phase solvent with arbitrary proportion, and metal ion does not generate corresponding hydroxide precipitation when liquid-phase catalyst pH is higher, traditional " gas-solid " and " gas-liquid-solid " haptoreaction can be changed into " gas-liquid " haptoreaction, the selectivity of producing ethylene with acetylene hydrogenation is improved, adds catalyst to H in gas phase2S、AsH3、PH3Deng anti-poisoning capability.

Description

A kind of acetylene ethene liquid-phase catalyst and preparation method thereof
Technical field
The invention belongs to gas treatment processing method technical field, more particularly to a kind of acetylene ethene liquid-phase catalyst and Its preparation method.
Background technology
With petroleum resources increasingly depleted, development coal chemical industry turns into for the chemical process of raw material substitutes petrochemical industry route Significant process, extensive concern is obtained, and obtain fast development.
In coal chemical technology, acetylene is produced by calcium carbide technique using coal as raw material, had been widely used, using acetylene as original Material, under selective hydrocatalyst effect, by Hydrogenation for ethylene product, it can further expand Coal Chemical Industry Route.It is and near Supply exceed demand for the main downstream product polyvinyl chloride (PVC) of acetylene over a little years, and PVC industrial profits are not high, are badly in need of expanding second Alkynes downstream product industrial chain；Ethene is most important basic material in petrochemical industry, is referred to as " mother of petrochemical industry ".Use extensively In plastics, lubricating oil, polymer and some intermediates, cracking is mainly passed through by oil or low-carbon alkanes at present.Ethene Downstream product such as ethylene glycol, butanediol, acrylic acid, polyvinyl alcohol etc. also have good economic value.Therefore, acetylene hydrogenation is developed The novel technique of ethene processed can provide a kind of new raw material source for ethylene industry, and reduce dependence of the ethene to petroleum resources Degree and production cost of ethylene, have broad application prospects.
Due to all reaction all heat releases of producing ethylene with acetylene hydrogenation process, selective hydrogenation of acetylene second is carried out using fixed bed Alkene, heat are difficult to remove rapidly, cause bed temperature rise violent.Polymerisation generation green oil covering catalyst surface occurs for acetylene, So that catalyst inactivation, so as to reduce catalytic activity, causing conversion of alkyne to reduce yield of ethene reduces.Carried out using slurry bed system During this reaction, catalyst is dispersed among solvent, and this process is three-phase haptoreaction, can remove the heat that reaction is released Amount, but because the catalysts and solvents that blast of gas are constantly in flow regime under its drive, easily cause the mill of catalyst Damage, catalyst abrasion are easily carried and caused damage by gas-liquid again afterwards, and the difficult recovery hardly possible of solid catalyst used in slurry bed system The problems such as regeneration.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of high concentration producing ethylene with acetylene hydrogenation liquid-phase catalyst, come real Existing high concentration preparing ethylene by selective hydrogenation of acetylene；The described liquid-phase catalyst can be dissolved each other with liquid phase solvent with arbitrary proportion, and And work as the higher (pH of liquid-phase catalyst pH>10) metal ion does not generate corresponding hydroxide precipitation when.The catalyst can change Become traditional acetylene hydrogenation pattern, traditional " gas-solid " and " gas-liquid-solid " haptoreaction is changed into " solution-air " haptoreaction.
The invention provides a kind of liquid-phase catalyst for producing ethylene with acetylene hydrogenation, the liquid-phase catalyst includes metal Ion, complexing agent, stabilizer and alkaline aqueous solution.
The liquid-phase catalyst is homogeneous, stable solution.
One or more of the metal ion in tungsten, molybdenum, palladium, manganese, iron, silver, lanthanum.
Preferably, the metal ion is 1~3 by mol ratio:1 primary metal ion and assistant metal ion Composition；
One or more of the primary metal ion in tungsten, molybdenum, palladium, preferably palladium；
One or more of the assistant metal ion in manganese, iron, silver, lanthanum, preferably one kind or two in manganese, iron Kind.
The mol ratio of metal ion of the present invention and the complexing agent is 0.6~1.5：1.
The metal ion is preferably metal nitrate.
The complexing agent is selected from nitrilotriacetic acid, ethylenediamine tetra-acetic acid and one kind or more in diethylene triamine pentacarboxylic acid Kind.
One or more of the stabilizer of the present invention in anhydrous sorbitol, glucose and fructose, preferably dehydration Sorbierite.
The solute of alkaline aqueous solution of the present invention is NaOH or KOH.
Liquid-phase catalyst preferable ph of the present invention is more than 10.The present invention to the composition of liquid-phase catalyst by closing Reason selection and proportioning, by adding stabilizer, it is ensured that under pH ＞ 10 strong basicity environment, the metal ion will not generate Hydroxide precipitates, the stable components of liquid-phase catalyst.Furthermore, because the environment of high ph-values can make acetylene ethene Unstripped gas in contained acid impurities gas quickly ionize, liquid-phase catalyst provided by the invention can be in higher pH value Used under environment, to resist the influence of impurities in feed gas gas.
As a preferred embodiment of the present invention, the liquid-phase catalyst is pH ＞ 10 aqueous solution, including following weight The composition of part：NaOH or 12~16.8 parts of KOH, 2~5 parts of anhydrous sorbitol, 19~23.6 parts of complexing agent, metal nitrate 15 ~29.7 parts；The complexing agent is nitrilotriacetic acid, ethylenediamine tetra-acetic acid or diethylene triamine pentacarboxylic acid；The metal nitrate Including palladium nitrate.
It is further preferred that the liquid-phase catalyst is pH ＞ 10 aqueous solution, include the composition of following parts by weight：KOH 16.8 parts, 5 parts of anhydrous sorbitol, 22 parts of ethylenediamine tetra-acetic acid, 8.6~20.7 parts of palladium nitrate, ferric nitrate or/and manganese nitrate 9~ 9.2 part.
Most preferably, the liquid-phase catalyst is pH ＞ 10 aqueous solution, includes the composition of following parts by weight：NaOH or 16.8 parts of KOH, 5 parts of anhydrous sorbitol, 22 parts of ethylenediamine tetra-acetic acid, 8.6 parts of palladium nitrate, 4.5 parts of ferric nitrate and manganese nitrate 4.7 Part.
The present invention further protects the preparation method of the liquid catalyst.
The preparation method comprises the following steps：NaOH or KOH solids are weighed, are configured to saturated aqueous solution at room temperature, Stabilizer is added thereto, and stirring adds complexing agent and metal ion, continued stirring until in solution to after without solid insoluble Without solid insoluble, liquid-phase catalyst is produced.
The present invention is further carried out preferably to the dosage of each raw material, and the mass ratio of the stabilizer and NaOH or KOH is preferred For 0.2~0.5:1；The mass ratio of the complexing agent and NaOH or KOH is preferably 0.8~3:1；The metal ion and complexing agent Mol ratio be preferably 0.6~1.5：1.
When preparing liquid-phase catalyst, the metal ion is preferably the nitrate of metal.
In the preparation method, due to when NaOH or KOH is dissolved in water can heat release, should stir into solution without heavy during preparation Form sediment, stop heat release, formed to saturated solution at room temperature, then other raw materials are added into solution.In order to ensure gained liquid phase Catalyst it is homogeneous, stably, when sequentially adding each raw material, should add while stirring.
The present invention further protects application of the liquid catalyst in producing ethylene with acetylene hydrogenation.
The liquid-phase catalyst should react solvent used with high concentration producing ethylene with acetylene hydrogenation and dissolve each other.The liquid-phase catalysis The dosage of agent is preferably the 0.1~15% of the solvent load.
The present invention is preferred by being carried out to the composition of liquid-phase catalyst, mainly by improving the pH value of liquid-phase catalyst, and Add complexing metal auxiliary agent, by increasing capacitance it is possible to increase liquid-phase catalyst application when to unstripped gas in impurities raw material anti-poisoning energy Power, the maximum concentration for the impurities in feed gas raw material that the liquid-phase catalyst allows can reach 1%.The impurity raw material includes H2S、 AsH3、PH3In one or more.
Beneficial effects of the present invention include：A kind of liquid-phase catalyst is provided, changes " gas-solid " for making traditional acetylene hydrogenation Two " gas-liquid-solid " three haptoreactions, are changed into " solution-air " haptoreaction；Traditional solid catalyst is changed into liquid-phase catalysis Agent, avoid generating covering of the green oil to catalyst active center；By adjusting variety classes complexing metal in liquid-phase catalyst Ratio so that the hydrogenation activity of liquid-phase catalyst is in suitable condition, can either ensure that the high conversion of acetylene avoids acetylene from sending out Consor is born from into green oil, and can ethene suppressing deep hydrogenation generation ethane；The selectivity of producing ethylene with acetylene hydrogenation is improved, is increased The yield of ethene in product gas；It can increase liquid-phase catalyst to original due to adding complexing metal auxiliary agent in catalyst system Expect H in gas2S、AsH3And PH3Anti- poisoning capability, the maximum concentrations of three kinds of impurity raw materials can in the unstripped gas that the catalyst allows Reach 1%.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
1g is used for the liquid-phase catalyst of producing ethylene with acetylene hydrogenation, including following component：NaOH 0.20g, anhydrous sorbitol 0.03g, nitrilotriacetic acid 0.32g, palladium nitrate 0.25g；The catalyst is pH ＞ 10 aqueous solution.
Embodiment 2
1g is used for the liquid-phase catalyst of producing ethylene with acetylene hydrogenation, including following component：NaOH 0.18g, anhydrous sorbitol 0.07g, ethylenediamine tetra-acetic acid 0.33g, palladium nitrate 0.26g；The catalyst is pH ＞ 10 aqueous solution.
Embodiment 3
1g is used for the liquid-phase catalyst of producing ethylene with acetylene hydrogenation, including following component：NaOH 0.17g, anhydrous sorbitol 0.07g, diethylene triamine pentaacetic acid 0.33g, palladium nitrate 0.29g；The catalyst is pH ＞ 10 aqueous solution.
Embodiment 4
1g is used for the liquid-phase catalyst of producing ethylene with acetylene hydrogenation, including following component：KOH 0.19g, anhydrous sorbitol 0.06g, ethylenediamine tetra-acetic acid 0.25g, palladium nitrate 0.23g, ferric nitrate 0.10g；The catalyst is pH ＞ 10 aqueous solution.
Embodiment 5
1g is used for the liquid-phase catalyst of producing ethylene with acetylene hydrogenation, including following component：KOH 0.22g, anhydrous sorbitol 0.07g, ethylenediamine tetra-acetic acid 0.29g, palladium nitrate 0.11g, ferric nitrate 0.06g, manganese nitrate 0.06g；The catalyst is pH ＞ 10 The aqueous solution.
Embodiment 6
Liquid-phase catalyst is prepared according to following steps：
NaOH solid 12g are weighed, are configured to saturated aqueous solution at room temperature；Anhydrous sorbitol 2g, stirring are added thereto To after without solid insoluble, nitrilotriacetic acid 19g and palladium nitrate 15g are added, is continued stirring until in solution without solid insoluble, i.e., Obtain liquid-phase catalyst.
Embodiment 7
Liquid-phase catalyst is prepared according to following steps：
NaOH solid 12g are weighed, are configured to saturated aqueous solution at room temperature；Anhydrous sorbitol 5g, stirring are added thereto To after without solid insoluble, ethylenediamine tetra-acetic acid 22g and palladium nitrate 17.25g are added, is continued stirring until in solution without solid not Molten thing, produces liquid-phase catalyst.
Embodiment 8
Liquid-phase catalyst is prepared according to following steps：
NaOH solid 12g are weighed, are configured to saturated aqueous solution at room temperature, add anhydrous sorbitol 5g, stirring thereto To after without solid insoluble, diethylene triamine pentaacetic acid 23.6g and palladium nitrate 20.7g are added, is continued stirring until in solution Without solid insoluble, liquid-phase catalyst is produced.
Embodiment 9
Liquid-phase catalyst is prepared according to following steps：
KOH solid 16.8g are weighed, are configured to saturated aqueous solution at room temperature, add anhydrous sorbitol 5g, stirring thereto To after without solid insoluble, ethylenediamine tetra-acetic acid 22g, palladium nitrate 20.7g and ferric nitrate 9g are added, is continued stirring until in solution Without solid insoluble, liquid-phase catalyst is produced.
Embodiment 10
Liquid-phase catalyst is prepared according to following steps：
KOH solid 16.8g are weighed, are configured to saturated aqueous solution at room temperature, add anhydrous sorbitol 5g, stirring thereto To after without solid insoluble, ethylenediamine tetra-acetic acid 22g, palladium nitrate 8.6g, ferric nitrate 4.5g and manganese nitrate 4.7g are added, is continued Stirring, without solid insoluble, produces liquid-phase catalyst into solution.
Experimental example
By hydrogen and acetylene with mol ratio 4：The unstripped gas of 1 composition, is passed through by liquid phase with flow velocity 1000mL/min from bottom In the liquid phase of solvent NMP (1-METHYLPYRROLIDONE) the 95g and gained liquid-phase catalyst 5g of embodiment 1~5 compositions, operating pressure is 0.2MPa, the successive reaction under the conditions of 140 DEG C, the gas-phase product from top outflow is separated, produces product.
Table 1：Liquid catalyst effect
As shown in Table 1, high concentration preparing ethylene by selective hydrogenation of acetylene catalyst provided by the invention is ensureing high turn of acetylene On the basis of rate, ethene high selectivity, H in unstripped gas can adapt to2S、AsH3And PH3The influence of higher concentration.
Although above the present invention is made to retouch in detail with general explanation, embodiment and experiment State, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art 's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, are belonged to claimed Scope.

Claims (8)

  1. A kind of 1. liquid-phase catalyst for producing ethylene with acetylene hydrogenation, it is characterised in that the liquid-phase catalyst include metal from Son, complexing agent, stabilizer and alkaline aqueous solution；
    One or more of the metal ion in tungsten, molybdenum, palladium, manganese, iron, silver, lanthanum；
    The complexing agent is selected from nitrilotriacetic acid, the one or more in ethylenediamine tetra-acetic acid and diethylene triamine pentacarboxylic acid；
    The mol ratio of the metal ion and the complexing agent is 0.6~1.5：1；
    One or more of the stabilizer in anhydrous sorbitol, glucose and fructose.
  2. 2. liquid-phase catalyst according to claim 1, it is characterised in that the metal ion is 1~3 by mol ratio:1 Primary metal ion and assistant metal ion composition；
    One or more of the primary metal ion in tungsten, molybdenum, palladium；
    One or more of the assistant metal ion in manganese, iron, silver, lanthanum.
  3. 3. liquid-phase catalyst according to claim 1, it is characterised in that the pH ＞ 10 of the liquid-phase catalyst；
    The solute of the alkaline aqueous solution is NaOH or KOH.
  4. 4. the preparation method of liquid-phase catalyst described in claims 1 to 3 any one, it is characterised in that the preparation method bag Include following steps：NaOH or KOH solids are weighed, are configured to saturated aqueous solution at room temperature；Stabilizer is added thereto, and stirring is extremely After solid insoluble, complexing agent and metal ion are added, is continued stirring until in solution without solid insoluble, is produced liquid phase and urge Agent.
  5. 5. preparation method according to claim 4, it is characterised in that the mass ratio of the stabilizer and NaOH or KOH is 0.2~0.5:1；The complexing agent and NaOH or KOH mass ratio are 0.8~3:1；The metal ion and the complexing agent Mol ratio is 0.6~1.5：1.
  6. 6. liquid-phase catalyst described in claims 1 to 3 any one or the preparation method described in claim 4 or 5 are prepared Application of the liquid-phase catalyst in producing ethylene with acetylene hydrogenation.
  7. 7. application according to claim 6, it is characterised in that used in the liquid-phase catalyst and producing ethylene with acetylene hydrogenation Solvent dissolves each other, and the dosage of the liquid-phase catalyst is the 0.1~15% of the solvent load.
  8. 8. the application according to claim 6 or 7, it is characterised in that included in the unstripped gas of the producing ethylene with acetylene hydrogenation The foreign gas of volume content≤1%；The foreign gas includes H2S、AsH3、PH3In one or more.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1110933A (en) * 1994-01-13 1995-11-01 法国石油公司 Preparation of hydrogenation catalyst resovable in organic liquid phase
CN101234350A (en) * 2006-12-11 2008-08-06 Ifp公司 Catalyst prepared by impregnation with an aqueous solution containing oxy(hydroxy)de particles of a cation in interaction with a molecular species of a group viii metal
CN103044179A (en) * 2012-12-19 2013-04-17 清华大学 Method for preparing ethylene through liquid-phase selective hydrogenation of acetylene in slurry reactor
CN104803819A (en) * 2015-05-15 2015-07-29 北京神雾环境能源科技集团股份有限公司 Method and system for producing ethylene by utilizing pulverized coal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7045670B2 (en) * 2003-09-03 2006-05-16 Synfuels International, Inc. Process for liquid phase hydrogenation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1110933A (en) * 1994-01-13 1995-11-01 法国石油公司 Preparation of hydrogenation catalyst resovable in organic liquid phase
CN101234350A (en) * 2006-12-11 2008-08-06 Ifp公司 Catalyst prepared by impregnation with an aqueous solution containing oxy(hydroxy)de particles of a cation in interaction with a molecular species of a group viii metal
CN103044179A (en) * 2012-12-19 2013-04-17 清华大学 Method for preparing ethylene through liquid-phase selective hydrogenation of acetylene in slurry reactor
CN104803819A (en) * 2015-05-15 2015-07-29 北京神雾环境能源科技集团股份有限公司 Method and system for producing ethylene by utilizing pulverized coal

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