CN202415403U - Device for producing tetrafluoroethylene by using monochlorodifluoromethane pyrolysis method - Google Patents
Device for producing tetrafluoroethylene by using monochlorodifluoromethane pyrolysis method Download PDFInfo
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- CN202415403U CN202415403U CN2011205309598U CN201120530959U CN202415403U CN 202415403 U CN202415403 U CN 202415403U CN 2011205309598 U CN2011205309598 U CN 2011205309598U CN 201120530959 U CN201120530959 U CN 201120530959U CN 202415403 U CN202415403 U CN 202415403U
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Abstract
The utility model relates to a device for producing tetrafluoroethylene by using a monochlorodifluoromethane pyrolysis method. A storage groove is successively connected with a vaporizer, a buffer tank, a pyrolyzer, a quench cooler, a Venturi flowmeter, a washing tower, an alkaline washing tower, a gasometer, a primary compressor, a freezing dehydrator, a secondary compressor, an oil separator, a silica gel drier and a precooler, wherein the precooler is respectively connected with a tail gas condenser and a middle groove through a pipeline; a triethylamine groove is connected with the middle groove through the pipeline; and the middle groove is successively connected with a dehydrating tower, a rectifying tower, a monomer recovering tower, a recovering tower and a residue liquid storage tank through the pipeline. According to the utility model, tetrafluoroethylene is produced by using the monochlorodifluoromethane pyrolysis method, thus production efficiency is greatly improved, process is reasonable, and manufacturing is simple. The device disclosed by the utility model is the simplest and ideal device for preparing tetrafluoroethylene.
Description
Technical field
The utility model belongs to the chemical plant field, relates to a kind of device with difluorochloromethane pyrogenic silica production tetrafluoroethylene, is particularly useful for producing tetrafluoroethylene.
Background technology
Tetrafluoroethylene special adhesive (XD--301) belongs to professional adhesive glue; It is strong that it has an initial bonding strength; Final cohesive strength is big, and glued membrane is pliable and tough, ageing-resistant performance good, high temperature resistant 200 ℃, can be widely used in various tetrafluoroethylene turning thin plates, moulded board and iron, aluminium, the stainless steel metal material is bonding.Tetrafluoroethylene tube connector, glass, pottery etc. are bonding.Original method is that the tetrafluoroethylene purity that present method is produced is low by Freon 114 catalysis dechlorination and making in the presence of aluminum trifluoride, and cost is high, complex equipments, and earning rate is low.
Summary of the invention
The utility model problem to be solved is, overcomes the deficiency of prior art, and a kind of device with difluorochloromethane pyrogenic silica production tetrafluoroethylene is provided, and adopts the difluorochloromethane pyrogenic silica to produce tetrafluoroethylene, has improved production efficiency greatly.Existing production technique is at first to make difluorochloromethane by chloroform, and the latter is hot cracked again, and dehydrochlorination promptly gets tetrafluoroethylene.During thermo-cracking, after difluorochloromethane is preheating to 400 ℃, with 950～1000 ℃ superheated vapour with 1.5～10 mixed in molar ratio; Get into the adiabatic reactor of processing with corrosion resistant material (like platinized nickel pipe); 700～900 ℃ of temperature, pressure 0.01～0.2MPa, the residence time 0.05～1s; Transformation efficiency is 75%～80%, and the tetrafluoroethylene selectivity can reach 90%～95%.By product is R 1216 and chain or ring-type hydro carbons perfluoro-compound.
Reactant gases is after washing and alkali cleaning remove de-chlorine hydride, and operations such as warp compression, drying, rectifying, extraction can get high purity product.The tetrafluoroethylene purity of polymerization-grade must be up to 99.9999%, and the impurity of several ppm can make polymkeric substance lose using value.In the presence of micro amount of oxygen, tetrafluoroethylene forms superoxide, and causes spontaneous polymerization.Need at low temperature, secluding air for this reason and add under the condition of stablizer (terpenes or tri-n-butylamine) and store.In addition, tetrafluoroethylene also can be by Freon 114 catalysis dechlorination and making in the presence of aluminum trifluoride.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of device of producing tetrafluoroethylene with the difluorochloromethane pyrogenic silica that provides according to the utility model; Comprise storage tank, vaporizer, surge tank, pyrolyzer, quencher, Venturi tube, water wash column, soda-wash tower, gas holder and compressor; Described storage tank is through pipeline be linked in sequence vaporizer, surge tank, pyrolyzer, quencher, Venturi tube, water wash column, soda-wash tower, gas holder, a stage compressor, lyophilization device, two stage compressor, oil separator, silica gel drier, pre-cooler; Pre-cooler connects tail gas condenser, medial launder respectively through pipeline; The triethylamine groove connects medial launder through pipeline, and medial launder is through pipeline be linked in sequence dehydration tower, rectifying tower, MONOMER RECOVERY tower, regenerating column and raffinate storage tank.
The utility model compared with prior art has significant advantage and beneficial effect:
Because utility model adopts the difluorochloromethane pyrogenic silica to produce tetrafluoroethylene, has improved production efficiency greatly.
The embodiment of the utility model is provided by following examples and accompanying drawing thereof in detail.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Wherein: 1, storage tank 2, vaporizer 3, surge tank 4, pyrolyzer 5, quencher 6, Venturi tube 7, water wash column 8, soda-wash tower 9, gas holder 10, a stage compressor 11, lyophilization device 12, two stage compressor 13, oil separator 14, silica gel drier 15, pre-cooler 16, tail gas condenser 17, medial launder 18, triethylamine groove 19, dehydration tower 20, rectifying tower 21, MONOMER RECOVERY tower 22, regenerating column 23, raffinate storage tank.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to embodiment, structure, characteristic and the effect thereof that provides according to the utility model, specify as after.
A kind of device of producing tetrafluoroethylene with the difluorochloromethane pyrogenic silica as shown in Figure 1; Comprise storage tank, vaporizer, surge tank, pyrolyzer, quencher, Venturi tube, water wash column, soda-wash tower, gas holder and compressor; Storage tank 1 is through pipeline be linked in sequence vaporizer 2, surge tank 3, pyrolyzer 4, quencher 5, Venturi tube 6, water wash column 7, soda-wash tower 8, gas holder 9, a stage compressor 10, lyophilization device 11, two stage compressor 12, oil separator 13, silica gel drier 14, pre-cooler 15; Pre-cooler connects tail gas condenser 16, medial launder 17 respectively through pipeline; Triethylamine groove 18 connects medial launder through pipeline, and medial launder is through pipeline be linked in sequence dehydration tower 19, rectifying tower 20, MONOMER RECOVERY tower 21, regenerating column 22 and raffinate storage tank 23.
Produce the technological process of tetrafluoroethylene with the difluorochloromethane pyrogenic silica: the HCFC-22 in the storage tank is quantitatively sent into carry out cracking in the Langaloy cracking reactor; Cracking reactor is the tube furnace structure; Can adopt the liquefied gas heating; The temperature of cracking reactor is controlled at 800～900 ℃, and pressure is lower than 0.15MPa.The residence time of heat scission reaction is very important, and the splitting gas preboiler that comes out from cracking reactor reclaims heat, behind the quencher chilling, gets into the hydrogen chloride absorption device; Get into gas holder through washing and alkali cleaning again; Collect in the bullion groove through lyophilization and dry, compression then,, remove light constituent and part high boiling material through multitower rectifying; Reclaim unreacted HCFC-22, return cracking reactor together with the part high boiling material.Separate the tetrafluoroethylene product that obtains and to add stopper usually.The organic fluorine liquid that contains perfluoroisobutylene must be through burning and the defluorination processing.
Claims (1)
1. device of producing tetrafluoroethylene with the difluorochloromethane pyrogenic silica; Comprise storage tank, vaporizer, surge tank, pyrolyzer, quencher, Venturi tube, water wash column, soda-wash tower, gas holder and compressor; It is characterized in that: described storage tank is through pipeline be linked in sequence vaporizer, surge tank, pyrolyzer, quencher, Venturi tube, water wash column, soda-wash tower, gas holder, a stage compressor, lyophilization device, two stage compressor, oil separator, silica gel drier, pre-cooler; Pre-cooler connects tail gas condenser, medial launder respectively through pipeline; The triethylamine groove connects medial launder through pipeline, and medial launder is through pipeline be linked in sequence dehydration tower, rectifying tower, MONOMER RECOVERY tower, regenerating column and raffinate storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205309598U CN202415403U (en) | 2011-12-19 | 2011-12-19 | Device for producing tetrafluoroethylene by using monochlorodifluoromethane pyrolysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205309598U CN202415403U (en) | 2011-12-19 | 2011-12-19 | Device for producing tetrafluoroethylene by using monochlorodifluoromethane pyrolysis method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202415403U true CN202415403U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205309598U Expired - Fee Related CN202415403U (en) | 2011-12-19 | 2011-12-19 | Device for producing tetrafluoroethylene by using monochlorodifluoromethane pyrolysis method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804119A (en) * | 2014-01-14 | 2014-05-21 | 衢州市鼎盛化工科技有限公司 | Device and method for preparing tetrafluoroethylene and hexafluoropropylene through cracking monochlorodifluoromethane |
| CN110373071A (en) * | 2019-05-29 | 2019-10-25 | 安徽皖水水务发展有限公司 | A kind of energy-saving anti-corrosive material and preparation method thereof for variable frequency non-negative pressure water |
-
2011
- 2011-12-19 CN CN2011205309598U patent/CN202415403U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804119A (en) * | 2014-01-14 | 2014-05-21 | 衢州市鼎盛化工科技有限公司 | Device and method for preparing tetrafluoroethylene and hexafluoropropylene through cracking monochlorodifluoromethane |
| CN110373071A (en) * | 2019-05-29 | 2019-10-25 | 安徽皖水水务发展有限公司 | A kind of energy-saving anti-corrosive material and preparation method thereof for variable frequency non-negative pressure water |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20141219 |
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| EXPY | Termination of patent right or utility model |