CN104311384A - Method for manufacturing dichloroethane - Google Patents
Method for manufacturing dichloroethane Download PDFInfo
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- CN104311384A CN104311384A CN201410629735.0A CN201410629735A CN104311384A CN 104311384 A CN104311384 A CN 104311384A CN 201410629735 A CN201410629735 A CN 201410629735A CN 104311384 A CN104311384 A CN 104311384A
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- monochloroethane
- ethene
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- ethylene dichloride
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Abstract
The invention discloses a method for manufacturing dichloroethane. The method comprises the following steps: reacting a hydrocarbon source, hydrogen chloride and oxygen in an oxychlorination reactor to generate by-product chloroethane or the chloroethane and chloroethylene; at least separating materials which are exhausted from the oxychlorination reactor into I) components rich in dichloroethane, II) components rich in chloroethane and III) fractions rich in chemical compounds which are lighter than ethylene and contain a part of ethylene in one or more steps. The method has obvious social benefits and economic benefits.
Description
Technical field
The present invention relates to a kind of method manufacturing ethylene dichloride.
Background technology
Patent application WO 03/48088 describes by ethane dehydrogenation with regard to it, causes formation to comprise ethane, the cut of ethene and hydrogen containing foreign, then makes described cut manufacture the method for DCE through chlorination and/or oxychlorination effect.
By the petroleum products that cracking is different, obtain very highly purified product by many complexity and expensive lock out operation with separating ethene from other products of cracking thus obtain the very high ethene of this purity subsequently.Consider the high cost relevant to the manufacture of this high-purity ethylene, develop the method that different use purity is less than the ethene manufacture DCE of 99.8%.The advantage of these methods is the process obtaining product by simplifying separating and cracking, and thus by casting out the complex separations be no advantage for manufacture DCE, thus reduce cost.
Such as, the method manufacturing DCE is combined in the ethane cracking that patent application WO 00/26164 describes by simplifying with ethylene chlorination.For this reason (to this effect), ethylene chlorination step is carried out under the impurity obtained in ethane cracking period exists.But there is following shortcoming in the method described: the ethene obtained can not be used in ethylene chlorination/oxychlorination process, reason is that described ethene comprises impurity, between the oxychlorination reaction period, the existence of this impurity causes the problem of utilization, that is, because heavy product makes the uneconomical conversion of the hydrogen of poisoning of catalyst and existence.The conversion of described hydrogen by oxygen consumed, and discharges a large amount of reaction heat.
European patent 0005655 advises in the process of oxygenolysis by product, use the catalyzer of platiniferous or iridium to improve combustion processes.The carrier of this catalyzer is the aluminum oxide with η crystalline texture.
But burning by product is still uneconomical and environmental pollution must be made great efforts to maintain minimum level.A kind of oxychlorination process process is proposed in european patent application 0132971.In the process, hydrogen chloride gas and oxygen and a kind of unsaturated organic compound react.Chlorine containing organic residue burns in oxygen enriched flame.Produce hydrogenchloride in combustion processes, this hydrogenchloride recirculation sends back in oxychlorination process process.
In German patent DE-AS-2400417, proposition absorbs the part by product in oxychlorination process with activated carbon, then is burnt at the temperature of 500 DEG C-2000 DEG C by unabsorbed by product (such as ethene).And then with those absorbed impurity of steam desorb, as ethylene dichloride and monochloroethane.But this oxychlorination process process is quite inconvenient.Because its temperature of combustion need higher than 2000 DEG C to ensure that resistates decomposes completely.European patent application 0132971 proposes must take some measures to avoid combustor material to produce corrosion under having hydrogenchloride to exist.
Thus this is by the capacity of oxychlorination reactor usually relevant to heat-exchange capacity for restriction.Thus due to the existence of hydrogen in the mixture, that must carry out being not of the common run is with high investment to ensure heat exchange surface area, and therefore ensures described reactor volume.Take the selection of hydrogen combusted in separate reactor can not solve this difficult problem, because oxygen needs a large amount of oxygen relative to the stoichiometry of hydrogen, and large swap table area is to eliminate the combustion heat, consequently remarkable consumption of ethylene, and the problem with security-related system can be produced.Finally, the water that removing is formed can cause the increase of production cost.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is the 10-30% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
The inherent temperature of oxychlorination reactor is carry out between 250 DEG C to 320 DEG C.
Carry out under the pressure of 1 to 8 bar in oxychlorination reactor.
The time that monochloroethane stops in cracking reactor is 5-60 second.
Can also carry out cracking catalysis reactions steps before oxi-chlorination, wherein used catalyst for cracking is aluminum oxide.
Embodiment
Embodiment 1
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 10% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Embodiment 2
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 12% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Embodiment 3
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 14% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Embodiment 4
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 15% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Embodiment 5
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 20% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Embodiment 6
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 21% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Embodiment 7
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 29% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Embodiment 8
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 27% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Embodiment 9
A kind of method manufacturing ethylene dichloride, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is 25% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Claims (1)
1. one kind manufactures the method for ethylene dichloride, it is characterized in that, hydrocarbon source and hydrogenchloride and oxygen, react in oxychlorination reactor, produce by product monochloroethane or monochloroethane and vinylchlorid in the reaction, the material that oxychlorination reactor is discharged at least is separated into I by a step or a few step) rich ethylene dichloride component and ii) rich monochloroethane component and iii) be rich in the compound lighter than ethene and comprise the cut of part ethene, and make the weight of rich ethylene dichloride component be less than 40% of the monochloroethane gross weight of the above-mentioned generation of step, and make to be rich in the compound lighter than ethene and the weight comprising the cut of part ethene is the 10-30% of total product weight, described hydrocarbon source is selected from petroleum naphtha, gas oil, gas reducing liquid, ethane, propane, butane, Trimethylmethane and its mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629735.0A CN104311384A (en) | 2014-11-10 | 2014-11-10 | Method for manufacturing dichloroethane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410629735.0A CN104311384A (en) | 2014-11-10 | 2014-11-10 | Method for manufacturing dichloroethane |
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| CN104311384A true CN104311384A (en) | 2015-01-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4849562A (en) * | 1987-01-03 | 1989-07-18 | The Dow Chemical Company | Process for producing ethylene dichloride |
| CN1712496A (en) * | 2004-06-25 | 2005-12-28 | 中国石油化工股份有限公司 | Catalytic crack |
| CN103274894A (en) * | 2013-05-16 | 2013-09-04 | 赵淮光 | Method for preparing dichloroethane by using zinc and nickel as active components of catalyst |
| CN103396287A (en) * | 2004-12-23 | 2013-11-20 | 索维公司 | Process for manufacture of 1,2-dichloroethane |
-
2014
- 2014-11-10 CN CN201410629735.0A patent/CN104311384A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4849562A (en) * | 1987-01-03 | 1989-07-18 | The Dow Chemical Company | Process for producing ethylene dichloride |
| CN1712496A (en) * | 2004-06-25 | 2005-12-28 | 中国石油化工股份有限公司 | Catalytic crack |
| CN103396287A (en) * | 2004-12-23 | 2013-11-20 | 索维公司 | Process for manufacture of 1,2-dichloroethane |
| CN103274894A (en) * | 2013-05-16 | 2013-09-04 | 赵淮光 | Method for preparing dichloroethane by using zinc and nickel as active components of catalyst |
Non-Patent Citations (1)
| Title |
|---|
| 朱芳振: "氧氯化法生产二氯乙烷工艺技术浅析", 《齐鲁石油化工》 * |
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Application publication date: 20150128 |