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CN104338560A - A composite metal complex catalyst for the synthesis of vinyl chloride - Google Patents

A composite metal complex catalyst for the synthesis of vinyl chloride Download PDF

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Publication number
CN104338560A
CN104338560A CN201310328771.9A CN201310328771A CN104338560A CN 104338560 A CN104338560 A CN 104338560A CN 201310328771 A CN201310328771 A CN 201310328771A CN 104338560 A CN104338560 A CN 104338560A
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China
Prior art keywords
metal complex
catalyst
complex compound
chloride
synthesizing chloroethylene
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CN201310328771.9A
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Chinese (zh)
Inventor
孟纪文
邵玉昌
左洪亮
林春迎
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China Haohua Dalian Research and Design Institute of Chemical Industry Coltd
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China Haohua Dalian Research and Design Institute of Chemical Industry Coltd
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Priority to CN201310328771.9A priority Critical patent/CN104338560A/en
Publication of CN104338560A publication Critical patent/CN104338560A/en
Pending legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The present invention provides a composite metal complex catalyst for synthesizing chloroethylene. The catalyst comprises an active metal complex, an auxiliary metal compound and a carrier. The gold element in the active metal complex accounts for 0.01-1% of the total weight of the catalyst, the auxiliary metal compound accounts for 0.1-15% of the total weight of the catalyst, and the balance is carrier active carbon. The invention adopts a gold complex as an active component, Au3+The electrode potential is greatly reduced, and the electrode is not easy to be reduced by an active carbon carrier and reductive gas acetylene and always keeps a high oxidation state. The composite metal complex catalyst prepared by the invention has acetylene conversion rateHigh efficiency, long service life, no loss of components, high safety and reliability, and no environmental pollution.

Description

A kind of composition metal complex compound catalyst of synthesizing chloroethylene
Technical field
The invention belongs to catalyst technical field, be specifically related to a kind of composition metal complex compound catalyst of acetylene method synthesizing chloroethylene.
Background technology
Vinyl chloride is important organic synthesis raw material, and main purposes produces polyvinyl chloride.At present, method for synthesizing chloroethylene mainly contains two kinds: acetylene method and ethylene process.VC in China monomer is main mainly with acetylene method greatly.
At present, acetylene method vinyl chloride makees catalyst mainly with activated carbon supported mercury chloride greatly, carries out in fixed bed reactors, and mercury chloride load capacity is 10.5% ~ 12.5%.This catalyst stability is very poor, and the easy sublimation of mercury chloride, and strong toxicity, cause environmental pollution.For solving the problem, Some Domestic enterprise and R&D institution have carried out some improvement work containing mercury catalyst, to reduce the use amount of mercury, but still can not thoroughly solve mercury pollution problem.Along with the enhancing of people's environmental consciousness and the increasing of international upper limit mercury pressure, the exploitation of catalyst without mercury is imperative.
For acetylene hydrochlorination reaction, existing large quantity research report both at home and abroad, the standard electrode EMF of metal is associated with acetylene hydrochlorination reactivity by Hutchings, and find that metal master electrode potential is higher, the acetylene hydrochlorination reactivity of its catalysis is higher.Wherein Hg 2+standard electrode EMF be 0.851V, Au 3+standard electrode EMF be 1.498V, thus Au 3+present higher acetylene hydrochlorination reactivity, become the focus of non-mercury catalyst research in recent years.Research shows, the acetylene hydrochlorination reactivity species of golden catalysis are Au 3+, but have very high electrode potential due to it, stability is very poor, is easy to loaded body active carbon and reaction raw materials Acetylene Reduction becomes Au 0and lose activity.At present, the golden non-mercury catalyst active component presoma that contains of report mainly adopts gold chloride, and the halide electrode potential of gold is higher, is easy to be reduced to elemental gold and produce reunion.And containing n-donor ligand and Au 3+can form stable complex compound, can effectively reduce its electrode potential, make it be not easy to be reduced at reaction conditions, remain high oxidation state, catalyst life extends greatly.
Summary of the invention
The mercuric chloride catalyst strong toxicity, the environmental pollution that the object of the invention is to use in the production of solution acetylene method synthesizing chloroethylene are serious, and the existing problem containing golden non-mercury catalyst less stable, and then provide the composition metal complex compound catalyst of a kind of synthesizing chloroethylene that a kind of reactivity is high, stability is strong.
The present invention is achieved by the following technical solutions:
A composition metal complex compound catalyst for synthesizing chloroethylene, this catalyst comprises active metal complex compound, assistant metal compound and carrier.
Described active metal complex compound is selected from (pyridine) gold trichloride (Au (py) Cl 3), (double salicylaldehyde contracting ethylenediamine) chlorauride ([Au (salen)] Cl), (2,2 '-bipyridyl) chlorauride ([AuCl 2(bipy)] Cl), (1,10-phenanthroline) chlorauride ([AuCl 2(phen)] Cl), (Neocuproine) chlorauride ([AuCl 2(CH 3) 2(phen)] Cl) in one or more.
Described assistant metal compound is one or more in potassium chloride, barium chloride, iron chloride, cobalt chloride, nickel chloride, copper chloride, zinc chloride.
Described carrier is one or more in ature of coal, wooden, cocoanut active charcoal, and specific area is greater than 300m 2/ g.
In described active metal complex compound, gold element accounts for 0.01% ~ 1% of total catalyst weight.
Described assistant metal compound accounts for 0.1% ~ 15% of total catalyst weight.
Compared with prior art, the invention has the beneficial effects as follows:
This invention, based on the existing problem containing the easy inactivation of golden non-mercury catalyst, adopts containing n-donor ligand and Au 3+form stable comple, reduce Au 3+electrode potential, higher oxidation state can be kept, and component does not run off, safe and reliable, environmentally safe.This composition metal complex compound catalyst is used for the reaction of acetylene method synthesizing chloroethylene, conversion of alkyne is high, long service life, avoids the pollution produced environment containing mercury catalyst.
Detailed description of the invention
Below by way of specific embodiment, the present invention will be described in more detail.Embodiment is only illustrate one of the present invention, and is not construed as limiting the invention.
Test condition:
Evaluating catalyst adopts internal diameter to be the fixed bed reactors of 10mm, long 400mm, electric heating temperature control, be warming up to reaction temperature required after, pass into hydrogen chloride gas activation 1h, then pass into acetylene, unstripped gas ratio is v(HCl) ︰ v(C 2h 2)=1.0 ~ 1.3, acetylene air speed 30 ~ 1000h -1, reaction pressure 0.1MPa.Reaction end gas passes into sodium hydroxide solution to carry out absorbing to remove unreacted hydrogen chloride, and online gas-chromatography carries out product composition analysis.
embodiment 1
Gold presoma is [AuCl 2(bipy)] Cl, assistant metal compound is FeCl 3, ZnCl 2, carrier is cocoanut active charcoal, and wherein, Au accounts for 0.05%, FeCl of total catalyst weight 3account for 0.5%, ZnCl of total catalyst weight 2account for 3% of total catalyst weight.
Utilize this catalyst to carry out synthesizing chloroethylene reaction, reaction condition is: reaction temperature is 180 DEG C, and unstripped gas ratio is v(HCl) ︰ v(C 2h 2)=1.2:1, acetylene air speed 30h -1, reaction pressure 0.1MPa.Catalytic performance is in table 1.
embodiment 2
Gold presoma is [AuCl 2(phen)] Cl, assistant metal compound is KCl, NiCl 2, ZnCl 2, carrier is cocoanut active charcoal, wherein, Au account for that 0.05%, KCl of total catalyst weight accounts for total catalyst weight 1.0%, NiCl 2account for 2.0%, ZnCl of total catalyst weight 2account for 3% of total catalyst weight.
Utilize this catalyst to carry out synthesizing chloroethylene reaction, reaction condition is: reaction temperature is 180 DEG C, and unstripped gas ratio is v(HCl) ︰ v(C 2h 2)=1.2:1, acetylene air speed 30h -1, reaction pressure 0.1MPa.Catalytic performance is in table 1.
embodiment 3
Gold presoma is [AuCl 2(CH 3) 2(phen)] Cl, assistant metal compound is BaCl 2, CoCl 2, carrier is cocoanut active charcoal, and wherein, Au accounts for 0.05%, BaCl of total catalyst weight 2account for 1.5%, CoCl of total catalyst weight 2account for 2.0% of total catalyst weight.
Utilize this catalyst to carry out synthesizing chloroethylene reaction, reaction condition is: reaction temperature is 180 DEG C, and unstripped gas ratio is v(HCl) ︰ v(C 2h 2)=1.2:1, acetylene air speed 30h -1, reaction pressure 0.1MPa.Catalytic performance is in table 1.
embodiment 4
Gold presoma is [Au (salen)] Cl, and assistant metal compound is NiCl 2, CuCl 2, BaCl 2, carrier is cocoanut active charcoal, and wherein, Au accounts for 0.05%, NiCl of total catalyst weight 2account for 1.0%, CuCl of total catalyst weight 2account for 1%, BaCl of total catalyst weight 2account for 10% of total catalyst weight.
Utilize this catalyst to carry out synthesizing chloroethylene reaction, reaction condition is: reaction temperature is 180 DEG C, and unstripped gas ratio is v(HCl) ︰ v(C 2h 2)=1.2:1, acetylene air speed 30h -1, reaction pressure 0.1MPa.Catalytic performance is in table 1.
comparative example 1 ~ 4
Catalyst activity component presoma is gold chloride, and other is identical with embodiment 1 ~ 4.Catalytic performance is in table 1.
table 1 different catalysts acetylene hydrochlorination reaction result
Project Reaction time (h) Conversion of alkyne (%) Vinyl chloride selective (%) Project
Embodiment 1 100 99.48 99.67 Embodiment 1
Embodiment 2 100 99.76 99.52 Embodiment 2
Embodiment 3 100 99.37 99.89 Embodiment 3
Embodiment 4 500 98.67 99.37 Embodiment 4
Comparative example 1 100 88.24 99.63 Comparative example 1
Comparative example 2 100 92.73 99.43 Comparative example 2
Comparative example 3 100 90.08 99.36 Comparative example 3
Comparative example 4 500 82.38 99.58 Comparative example 4
As can be seen from Table 1, adopting gold complex to be active component presoma, is that the catalyst stability that active component presoma obtains obviously strengthens than gold chloride.

Claims (6)

1. a composition metal complex compound catalyst for synthesizing chloroethylene, is characterized in that, this catalyst comprises active metal complex compound, assistant metal compound and carrier.
2. the composition metal complex compound catalyst of a kind of synthesizing chloroethylene according to claim 1, is characterized in that, described active metal complex compound is selected from (pyridine) gold trichloride (Au (py) Cl 3), (double salicylaldehyde contracting ethylenediamine) chlorauride ([Au (salen)] Cl), (2,2 '-bipyridyl) chlorauride ([AuCl 2(bipy)] Cl), (1,10-phenanthroline) chlorauride ([AuCl 2(phen)] Cl), (Neocuproine) chlorauride ([AuCl 2(CH 3) 2(phen)] Cl) in one or more.
3. the composition metal complex compound catalyst of a kind of synthesizing chloroethylene according to claim 1, it is characterized in that, described assistant metal compound is one or more in potassium chloride, barium chloride, iron chloride, cobalt chloride, nickel chloride, copper chloride, zinc chloride.
4. the composition metal complex compound catalyst of a kind of synthesizing chloroethylene according to claim 1, is characterized in that, described carrier is one or more in ature of coal, wooden, cocoanut active charcoal, and specific area is greater than 300m 2/ g.
5. the composition metal complex compound catalyst of a kind of synthesizing chloroethylene according to claim 1,2, is characterized in that, in described active metal complex compound, gold element accounts for 0.01% ~ 1% of total catalyst weight.
6. the composition metal complex compound catalyst of a kind of synthesizing chloroethylene according to claim 1, is characterized in that, described assistant metal compound accounts for 0.1% ~ 15% of total catalyst weight
CN201310328771.9A 2013-07-31 2013-07-31 A composite metal complex catalyst for the synthesis of vinyl chloride Pending CN104338560A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104801345A (en) * 2015-03-31 2015-07-29 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) Supported type mercury-free catalyst for chloroethylene production with acetylene hydrochlorination method
CN107803222A (en) * 2017-09-29 2018-03-16 浙江工业大学 A kind of catalyzed by ruthenium complexes agent for acetylene hydrochlorination reaction
CN109865534A (en) * 2019-03-11 2019-06-11 陕西开达化工有限责任公司 A kind of Nano type Au base catalyst and preparation method and application

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102631942A (en) * 2012-04-17 2012-08-15 清华大学 Composite metal salt catalyst for hydrochlorination reaction of acetylene
CN102631947A (en) * 2012-04-01 2012-08-15 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) Gold complex catalyst for hydrochlorinating acetylene
GB2492888A (en) * 2011-07-11 2013-01-16 Johnson Matthey Plc Catalyst and method for its preparation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2492888A (en) * 2011-07-11 2013-01-16 Johnson Matthey Plc Catalyst and method for its preparation
CN102631947A (en) * 2012-04-01 2012-08-15 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) Gold complex catalyst for hydrochlorinating acetylene
CN102631942A (en) * 2012-04-17 2012-08-15 清华大学 Composite metal salt catalyst for hydrochlorination reaction of acetylene

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104801345A (en) * 2015-03-31 2015-07-29 新疆兵团现代绿色氯碱化工工程研究中心(有限公司) Supported type mercury-free catalyst for chloroethylene production with acetylene hydrochlorination method
CN107803222A (en) * 2017-09-29 2018-03-16 浙江工业大学 A kind of catalyzed by ruthenium complexes agent for acetylene hydrochlorination reaction
CN107803222B (en) * 2017-09-29 2020-06-09 浙江工业大学 A kind of ruthenium complex catalyst for acetylene hydrochlorination reaction
CN109865534A (en) * 2019-03-11 2019-06-11 陕西开达化工有限责任公司 A kind of Nano type Au base catalyst and preparation method and application
CN109865534B (en) * 2019-03-11 2021-10-26 陕西开达化工有限责任公司 Nano Au-based catalyst, preparation method and application

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Application publication date: 20150211