CN103044187B - A kind of method and system of producing monochloroethane - Google Patents
A kind of method and system of producing monochloroethane Download PDFInfo
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- CN103044187B CN103044187B CN201310018111.0A CN201310018111A CN103044187B CN 103044187 B CN103044187 B CN 103044187B CN 201310018111 A CN201310018111 A CN 201310018111A CN 103044187 B CN103044187 B CN 103044187B
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- monochloroethane
- zinc chloride
- hydrochloric acid
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- evaporation
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a kind of method of producing monochloroethane, comprising the following steps of the method for described production monochloroethane: the zinc chloride of hydrochloric acid bottom hydrochloric acid heating unit and after evaporation concentration enters hydrochloric acid heating unit in the lump and heat, then monochloroethane reaction unit is entered, carry out monochloroethane and mixed solution thermal separation, the magnesium chloride separated enters dehydration by evaporation device and heats, liquor zinci chloridi is concentrated, and the zinc chloride of high density recycles from the bottom flowing to hydrochloric acid evaporation unit.The present invention can supporting larger heat interchanging area rise film graphite evaporator, realize chloroethene reaction unit and maximize, improve monochloroethane industrialized unit level; Improve speed of reaction and feed stock conversion, use graphite as the sparger of monochloroethane reactive moieties, good corrosion resistance, adopt steel lining tetrafluoro cylindrical shell and pipeline, both anti-corrosion, improve working pressure and plant factor, in addition, the present invention is easy to operate, improves the production efficiency of monochloroethane, has good using value.
Description
Technical field
The invention belongs to chemical production field, particularly relate to a kind of method and system of producing monochloroethane.
Background technology
At present, halogen alkylation methods production monochloroethane all adopts enamel reactor as conversion unit, add after hydrochloric acid and alcohol mix by a certain percentage in reactor, reacting kettle jacketing uses steam heating, control reaction mass temperature, simultaneously will the monochloroethane that generates of reaction, the water that not anti-hydrochloric acid, alcohol and the water brought into, chemical reaction produce all is vaporized and is migrated out reactor.Because using enamel equipment, working pressure is restricted, and service temperature can not reach ideal condition, causes ethanol conversion to only have about 80%; The water that unreacted hydrochloric acid, alcohol, raw material are brought into, the water of chemical reaction generation, in the lump out, the amount of aftertreatment is larger in the monochloroethane mixing all generated with reaction; Because enamel reacting kettle jacketing heating-surface area is subject to the restriction of enamel reaction manufacture level, therefore the steam output of separate unit enamel reactor is also subject to the restriction of heating-surface area, the separate unit enamel reactor turnout of 8000L also only has 2T/d, need a fairly large number of reactor parallel operation, the operation control work amount of being exists, floor space is large, cannot realize Automated condtrol, unsafe many factors.
Summary of the invention
The object of the invention is to utilize a kind of method and system of producing monochloroethane, be intended to solve during existing monochloroethane is produced the complicated operation existed, inefficiency, the problem that unsafe factor is more.
The object of the present invention is to provide a kind of method of producing monochloroethane, comprising the following steps of the method for described production monochloroethane: the zinc chloride of hydrochloric acid bottom hydrochloric acid heating unit and after evaporation concentration enters hydrochloric acid heating unit in the lump and heat, then monochloroethane reaction unit is mixed into alcohol, after reaction, monochloroethane and mixed solution heat rise to monochloroethane tripping device, monochloroethane and responseless ethanol and partial hydrogenation hydrogen and water, vaporization is out separated with liquor zinci chloridi, the zinc chloride separated enters zinc chloride dehydration by evaporation device and heats, heating after heat rises to sour water steam in water separator and separates with zinc chloride, liquor zinci chloridi is concentrated, the zinc chloride of high density recycles from the bottom flowing to hydrochloric acid evaporation unit.
Further, the method for described production monochloroethane specifically comprises the following steps:
Hydrochloric acid and zinc chloride enter hydrochloric acid heating unit and heat;
Produce monochloroethane;
Monochloroethane is separated with unreacted alcohol;
Dehydration by evaporation process is carried out to zinc chloride;
Sour water steam is separated with zinc chloride.
Another object of the present invention is to provide a kind of and produce monochloroethane system, described production monochloroethane system comprises:
Hydrochloric acid heating unit, for heating hydrochloric acid and zinc chloride;
Monochloroethane reaction unit, is connected, for the generation of monochloroethane with described hydrochloric acid solution thermal;
Monochloroethane tripping device, is connected with described monochloroethane reaction unit, for monochloroethane and being separated for reaction zinc chloride;
Zinc chloride dehydration by evaporation device, is connected with described monochloroethane tripping device, for the processed of zinc chloride;
Water separator, is connected with described zinc chloride dehydration by evaporation device, for being separated of sour water steam and zinc chloride.
Further, described hydrochloric acid heating unit and zinc chloride dehydration by evaporation device adopt impermeable graphite climbing-film evaporator.
Further, described monochloroethane reaction unit is primarily of steel lining tetrafluoro cylindrical shell and the Multi-layer graphite sparger composition being fixed on cylindrical shell.
Further, described monochloroethane tripping device and steam separator device adopt steel lining tetrafluoro cylindrical shell.
Further, described hydrochloric acid heating unit, monochloroethane reaction unit, monochloroethane tripping device, zinc chloride dehydration by evaporation device, water separator adopt steel lining tetrafluoro pipeline to be connected.
tool of the present invention has the following advantages:
The method and system of production monochloroethane provided by the invention, can supporting larger heat interchanging area rise film graphite evaporator, realize chloroethene reaction unit and maximize, improve monochloroethane industrialized unit level; Monochloroethane reactor service temperature can be controlled in 120 DEG C--and 160 DEG C, operating restraint is comparatively large, and it is longer to react non-residence time phase, and ethanol conversion can bring up to more than 95%; Monochloroethane mixed gas is first vaporized spilling, and sour water steam is finally vaporized spilling, reduces the dividing potential drop of reaction process water vapor, improve speed of reaction and feed stock conversion, use graphite as the sparger of monochloroethane reactive moieties, good corrosion resistance, adopt steel lining tetrafluoro cylindrical shell and pipeline, both anti-corrosion, can working pressure be improved again, improve plant factor, in addition, the present invention is easy to operate, improves the production efficiency of monochloroethane, has good using value.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the method for the production monochloroethane that the embodiment of the present invention provides.
Fig. 2 is the structured flowchart of the production monochloroethane system that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiments provide a kind of method of producing monochloroethane, comprising the following steps of the method for this production monochloroethane: the zinc chloride of hydrochloric acid bottom hydrochloric acid heating unit and after evaporation concentration enters hydrochloric acid heating unit in the lump and heat, then monochloroethane reaction unit is mixed into alcohol, after reaction, monochloroethane and mixed solution heat rise to monochloroethane tripping device, monochloroethane and responseless ethanol and partial hydrogenation hydrogen and water, vaporization is out separated with liquor zinci chloridi, the zinc chloride separated enters zinc chloride dehydration by evaporation device and heats, heating after heat rises to sour water steam in water separator and separates with zinc chloride, liquor zinci chloridi is concentrated, the zinc chloride of high density recycles from the bottom flowing to hydrochloric acid evaporation unit.
As a prioritization scheme of the embodiment of the present invention, the method for producing monochloroethane specifically comprises the following steps:
Hydrochloric acid and zinc chloride enter hydrochloric acid heating unit and heat;
Produce monochloroethane;
Monochloroethane is separated with unreacted alcohol;
Dehydration by evaporation process is carried out to zinc chloride;
Sour water steam is separated with zinc chloride.
Referring to accompanying drawing, the method and system technical process of the production monochloroethane of the embodiment of the present invention is described in further detail.
As shown in Figure 1, the method steps of the production monochloroethane of the embodiment of the present invention is:
S101: hydrochloric acid and zinc chloride enter hydrochloric acid heating unit and heat;
S102: produce monochloroethane;
S103: monochloroethane is separated with unreacted alcohol;
S104: dehydration by evaporation process is carried out to zinc chloride;
S105: sour water steam is separated with zinc chloride;
Idiographic flow of the present invention is: the zinc chloride of hydrochloric acid bottom hydrochloric acid heating unit 1 and after evaporation concentration enters hydrochloric acid heating unit 1 in the lump and heat, then same alcohol gas (liquid) is mixed into monochloroethane reaction unit 2, after reaction, monochloroethane and mixed solution heat rise to monochloroethane tripping device 3, monochloroethane and responseless ethanol and partial hydrogenation hydrogen and water, vaporization is out separated with liquor zinci chloridi, the zinc chloride separated enters zinc chloride dehydration by evaporation device 4 and heats, heating after heat rises to sour water steam in water separator 5 and separates with zinc chloride, liquor zinci chloridi is concentrated, the zinc chloride of high density recycles from the bottom flowing to hydrochloric acid evaporation section.
As shown in Figure 2, the present invention arranges hydrochloric acid heating unit 1, monochloroethane reaction unit 2, monochloroethane tripping device 3, zinc chloride dehydration by evaporation device 4, and water separator 5 forms; Hydrochloric acid heating unit 1 and zinc chloride dehydration by evaporation device 4 are impermeable graphite climbing-film evaporators; Monochloroethane reaction unit 2 is made up of steel lining tetrafluoro cylindrical shell and the Multi-layer graphite sparger being fixed on cylindrical shell; Monochloroethane tripping device 3 and steam separator device 5 are steel lining tetrafluoro cylindrical shells; Several part all adopts steel lining tetrafluoro pipeline to be connected to entirety.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. produce the method for monochloroethane for one kind, it is characterized in that, comprising the following steps of the method for described production monochloroethane: the zinc chloride of hydrochloric acid bottom hydrochloric acid heating unit and after evaporation concentration enters hydrochloric acid heating unit in the lump and heat, then monochloroethane reaction unit is mixed into alcohol, after reaction, monochloroethane and mixed solution heat rise to monochloroethane tripping device, monochloroethane and responseless ethanol and partial oxidation hydrogen and water, vaporization is out separated with liquor zinci chloridi, the zinc chloride separated enters zinc chloride dehydration by evaporation device and heats, heating after heat rises to sour water steam in water separator and separates with zinc chloride, liquor zinci chloridi is concentrated, the zinc chloride of high density recycles from the bottom flowing to hydrochloric acid evaporation unit,
The method of described production monochloroethane specifically comprises the following steps:
Hydrochloric acid and zinc chloride enter hydrochloric acid heating unit and heat;
Produce monochloroethane;
Monochloroethane is separated with unreacted alcohol;
Dehydration by evaporation process is carried out to zinc chloride;
Sour water steam is separated with zinc chloride.
2. produce a monochloroethane device, it is characterized in that, described production monochloroethane system comprises:
Hydrochloric acid heating unit, for heating hydrochloric acid and zinc chloride;
Monochloroethane reaction unit, is connected, for the generation of monochloroethane with described hydrochloric acid solution thermal;
Monochloroethane tripping device, is connected with described monochloroethane reaction unit, for monochloroethane and being separated for reaction zinc chloride;
Zinc chloride dehydration by evaporation device, is connected with described monochloroethane tripping device, for the processed of zinc chloride;
Water separator, is connected with described zinc chloride dehydration by evaporation device, for being separated of sour water steam and zinc chloride;
Described hydrochloric acid heating unit and zinc chloride dehydration by evaporation device adopt impermeable graphite climbing-film evaporator;
Described monochloroethane reaction unit is primarily of steel lining tetrafluoro cylindrical shell and the Multi-layer graphite sparger composition being fixed on cylindrical shell;
Described monochloroethane tripping device and steam separator device adopt steel lining tetrafluoro cylindrical shell;
Described hydrochloric acid heating unit, monochloroethane reaction unit, monochloroethane tripping device, zinc chloride dehydration by evaporation device, water separator adopt steel lining tetrafluoro pipeline to be connected.
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| CN201310018111.0A CN103044187B (en) | 2013-01-17 | 2013-01-17 | A kind of method and system of producing monochloroethane |
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| CN201310018111.0A CN103044187B (en) | 2013-01-17 | 2013-01-17 | A kind of method and system of producing monochloroethane |
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| CN103044187B true CN103044187B (en) | 2015-07-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104829416B (en) * | 2015-03-27 | 2017-01-18 | 江苏银珠集团海拜科技股份有限公司 | A continuous production process of chloroethane |
| CN105254469B (en) * | 2015-10-28 | 2017-03-01 | 浙江迪邦化工有限公司 | A kind of process for cleanly preparing of ethyl chloride and device |
| CN109651072B (en) * | 2019-01-18 | 2021-12-17 | 淮阴工学院 | Method for preparing chloroethane from hydrochloric acid containing sulfur dioxide |
| CN111875471B (en) * | 2020-07-28 | 2023-08-29 | 华陆工程科技有限责任公司 | Catalyst circulation dehydration chloromethane synthesis process |
| CN112125330A (en) * | 2020-10-23 | 2020-12-25 | 山东瑞琦能源科技有限公司 | Multi-effect evaporation and concentration production process of zinc chloride solution |
Citations (4)
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|---|---|---|---|---|
| GB708194A (en) * | 1950-05-10 | 1954-04-28 | Henri Martin Guinot | Improvements in process and apparatus for the production of chloromethanes, particularly methylene chloride and chlorethanes |
| CN101134704A (en) * | 2007-10-16 | 2008-03-05 | 南京工业大学 | Process for producing ethylene by ethanol dehydration |
| CN101704707A (en) * | 2009-04-27 | 2010-05-12 | 南通泰禾化工有限公司 | Method for removing impurity from trichloropropane |
| CN102850178A (en) * | 2012-08-24 | 2013-01-02 | 江苏振方医药化工有限公司 | Method for synthesizing ethyl chloride by using gas phase hydrogen chloride and ethanol |
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2013
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB708194A (en) * | 1950-05-10 | 1954-04-28 | Henri Martin Guinot | Improvements in process and apparatus for the production of chloromethanes, particularly methylene chloride and chlorethanes |
| CN101134704A (en) * | 2007-10-16 | 2008-03-05 | 南京工业大学 | Process for producing ethylene by ethanol dehydration |
| CN101704707A (en) * | 2009-04-27 | 2010-05-12 | 南通泰禾化工有限公司 | Method for removing impurity from trichloropropane |
| CN102850178A (en) * | 2012-08-24 | 2013-01-02 | 江苏振方医药化工有限公司 | Method for synthesizing ethyl chloride by using gas phase hydrogen chloride and ethanol |
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| 氯乙烷生产过程的降耗途径;李来文;《技术改造》;19960331;第14卷(第1期);第21页2.2节、第22页3.2节 * |
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Application publication date: 20130417 Assignee: Nanjing, Hongze spices company limited Assignor: Jiangsu Yinzhu Chemical Group Co., Ltd. Contract record no.: 2013320000473 Denomination of invention: Method and system for producing ethyl chloride License type: Exclusive License Record date: 20130530 |
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