CN207512102U - A kind of device for preparing 2,3,3,3- tetrafluoropropenes - Google Patents
A kind of device for preparing 2,3,3,3- tetrafluoropropenes Download PDFInfo
- Publication number
- CN207512102U CN207512102U CN201721339777.6U CN201721339777U CN207512102U CN 207512102 U CN207512102 U CN 207512102U CN 201721339777 U CN201721339777 U CN 201721339777U CN 207512102 U CN207512102 U CN 207512102U
- Authority
- CN
- China
- Prior art keywords
- reactor
- rectifying
- pipeline
- rectifying column
- discharge port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model is related to a kind of devices for preparing 2,3,3,3 tetrafluoropropenes.The device of 2,3,3,3 tetrafluoropropene of preparation, including the front and rear first reactor set gradually, first rectifying column group, second reactor, Second distillation column group, crude product tank and third distillation column group.The device of 2,3,3,3 tetrafluoropropene of preparation loads two different catalyst in second reactor, can be carried out at the same time two reactions, simplify technological process；It reacts for gas phase reaction, efficiently solves the problem of liquid phase reactor catalyst life is short, and reactor corrosion is serious；Reaction process is simple, reduces equipment investment and energy consumption.
Description
Technical field
The utility model is related to a kind of devices for preparing 2,3,3,3- tetrafluoropropenes.
Background technology
At present, 2, there are mainly three types of the preparation methods of 3,3,3- tetrafluoropropenes：3,3,3- trifluoro propenes method, hexafluoropropene method
With 1,1,2,3- tetrachloropropylenes (TCP) method.Wherein, 3,3,3- trifluoro propene methods operation route it is long, the three wastes of generation are more, product into
This height；1,1,2,3- tetrachloropropylene method reaction step is few, and raw material availability is high；Hexafluoropropene method preparation route is long, total yield
It is not high；And the intermediate raw material that other preparation processes are this three routes is derived.
Such as the Chinese patent of publication number CN101597209A, a kind of integration for preparing 2,3,3,3- tetrafluoropropenes is provided
Method, the method includes：By l, l, 2,3- tetrachloropropylenes and the first fluorination reagent reaction generation chloro- 3,3,3- trifluoro propenes of 2-
(HCFO-1233xf) and the first midbody composite of the first chlorine byproducts；By the first intermediate of the first chlorine byproducts
Composition and the chloro- 1,1,1,2- tetrafluoropropanes (HCFC-244bb) of the second fluorination reagent reaction generation 2- and the second by-product containing chlorine
Second midbody composite of object；Then at least part catalysis dechlorination hydrogen of HCFC-244bb is generated into 2,3,3,3- tetrafluoros
Propylene.This three step of route synthesizes 2,3,3,3- tetrafluoropropenes, and HCFO-1233xf is converted to HCFC- in Liquid-phase reactor
244bb, catalyst are antimony halides, and reactor uses liner TFE or PFA, and shortcoming is inside reactor seriously corroded, can be roused
Packet, the selection of equipment is more difficult, and the third step saponification three wastes are more, and yield is low.To sum up, it is made in currently available technology
The reaction step of standby 2,3,3,3- tetrafluoropropenes is more, and separation equipment is lengthy and jumbled, and catalyst life is short, inside reactor seriously corroded etc.
Problem, now there is an urgent need for a kind of raising utilization rates of equipment and installations, optimize 2,3,3,3- tetrafluoropropene preparation facilities of reaction process.
Utility model content
The utility model in order to make up for the deficiencies of the prior art, provides that a kind of reaction step is few, technological process is simple, right
Consersion unit corrodes the device of light 2,3,3,3- tetrafluoropropene of preparation, solves problems of the prior art.
The utility model is achieved by the following technical solution：
A kind of device for preparing 2,3,3,3- tetrafluoropropenes, it is characterized in that：Including the front and rear first reactor set gradually,
First rectifying column group, second reactor, Second distillation column group, crude product tank and third distillation column group, at the top of first reactor
Equipped with first reactor feed inlet, the first reactor discharge port set on first reactor bottom passes through pipeline and first rectifying column
The feed inlet of group is connected, and the discharge port of first rectifying column group passes through pipeline and the second reactor top at the top of second reactor
Portion's feed inlet is connected, the charging that the second reactor discharge port set on second reactor bottom passes through pipeline and Second distillation column group
Mouth is connected；The discharge port of Second distillation column group is connected by pipeline with the crude product tank feed inlet set on crude product tank top, set on thick
The crude product tank discharge port of product pot bottom is connected by pipeline with the feed inlet of third distillation column group；At first reactor feed inlet
Pipeline be equipped with the first HF add in mouth and 1,1,2,3- tetrachloropropylene add in mouth, in the discharge port of first rectifying column group and second
Pipeline between reactor head feed inlet is equipped with the 2nd HF and adds in mouth.
Mouth is added in the first HF and 1,1,2,3- tetrachloropropylenes are added on the pipeline between mouth and first reactor feed inlet
Equipped with the first preheater, the second preheater is equipped on the pipeline at second reactor top feed mouth.
The first rectifying column group includes the No.1 rectifying column being arranged in series and No. two rectifying columns, first reactor discharge port
It is connected by pipeline with the No.1 rectifying column feed inlet in the middle part of No.1 rectifying column, set on the No.1 essence of No.1 rectifier bottoms
It evaporates tower discharge port by pipeline with No. two rectifying column feed inlets in the middle part of No. two rectifying columns to be connected, set on No. two rectifying tower tops
No. two rectifying column discharge ports in portion are connected by pipeline with second reactor top feed mouth.
The Second distillation column group includes No. three rectifying columns, No. four rectifying columns and No. five rectifying columns that are arranged in series, and second
Reactor discharge port is connected by pipeline with No. three rectifying column feed inlets in the middle part of No. three rectifying columns, set on No. three rectifying columns
No. three rectifying column discharge ports of bottom are connected by pipeline with No. four rectifying column feed inlets in the middle part of No. four rectifying columns, are set on
Discharge port passes through pipeline and the crude product tank feed inlet phase set on crude product tank top at the top of No. four rectifying columns at the top of No. four rectifying columns
Even, pass through pipeline and No. five in the middle part of No. five rectifying columns set on No. four rectifier bottoms discharge ports of No. four rectifier bottoms
Rectifying column feed inlet is connected, and discharge port is anti-with being set on second by pipeline at the top of No. five rectifying columns at the top of No. five rectifying columns
Feed inlet in the middle part of the second reactor in the middle part of device is answered to be connected, No. five rectifier bottoms discharge ports set on No. five rectifier bottoms lead to
Piping is connected with the second reactor top feed mouth at the top of second reactor.
The third distillation column group includes No. six rectifying columns being arranged in series and No. seven rectifying columns, in No. six rectifying columns
No. six rectifying column feed inlets in portion are connected by pipeline with crude product tank discharge port, set on No. six rectifying columns of No. six rectifier bottoms
Discharge port is connected by pipeline with No. seven rectifying column feed inlets in the middle part of No. seven rectifying columns, is set at the top of No. seven rectifying columns
There are No. seven rectifying column discharge ports.
The first reactor and second reactor are calandria type fixed bed reactor, and second reactor is two-part tubulation
Formula fixed bed reactors.
The beneficial effects of the utility model are：The device of 2,3,3, the 3- tetrafluoropropene of preparation, simple for process, the second reaction
Two different catalyst are loaded in device, two reactions can be carried out at the same time, simplify technological process；It reacts for gas phase reaction,
Efficiently solve the problem of liquid phase reactor catalyst life is short, and reactor corrosion is serious；Reaction process is simple, reduces equipment throwing
Money and energy consumption.
Description of the drawings
The utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is the structure diagram of the utility model.
In figure, 1, first reactor, 2, first rectifying column group, 3, second reactor, 4, Second distillation column group, 5, crude product
Tank, 6, third distillation column group, 7, first reactor feed inlet, 8, first reactor discharge port, 9, second reactor top feed
Mouthful, 10, second reactor discharge port, 11, crude product tank feed inlet, 12, crude product tank discharge port, the 13, the first HF adds in mouth, and 14,1,
1,2,3- tetrachloropropylene adds in mouth, and the 15, the 2nd HF adds in mouth, the 16, first preheater, the 17, second preheater, and 18, No.1 rectifying
Tower, 19, No. two rectifying columns, 20, No.1 rectifying column feed inlet, 21, No.1 rectifying column discharge port, 22, No. two rectifying column feed inlets,
23rd, No. two rectifying column discharge ports, 24, No. three rectifying columns, 25, No. four rectifying columns, 26, No. five rectifying columns, 27, No. three rectifying columns into
Material mouth, 28, No. three rectifying column discharge ports, 29, No. four rectifying column feed inlets, 30, No. four rectifying columns top discharge ports, 32, No. four
Rectifier bottoms discharge port, 33, No. five rectifying column feed inlets, discharge ports at the top of 34, No. five rectifying columns, 35, in second reactor
Portion's feed inlet, 36, No. five rectifier bottoms discharge ports, 38, No. six rectifying columns, 39, No. seven rectifying columns, 40, No. six rectifying columns into
Material mouth, 41, No. six rectifying column discharge ports, 42, No. seven rectifying column feed inlets, 43, No. seven rectifying column discharge ports.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this reality
It is described in detail with novel.
As shown in fig. 1, the device of 2,3,3, the 3- tetrafluoropropene of preparation, including the front and rear first reactor set gradually
1st, first rectifying column group 2, second reactor 3, Second distillation column group 4, crude product tank 5 and third distillation column group 6, in first reactor
1 top be equipped with first reactor feed inlet 7, set on 1 bottom of first reactor first reactor discharge port 8 by pipeline with
The feed inlet of first rectifying column group 2 is connected, and the discharge port of first rectifying column group 2 is by pipeline and set on 3 top of second reactor
Second reactor top feed mouth 9 be connected, set on 3 bottom of second reactor second reactor discharge port 10 by pipeline with
The feed inlet of Second distillation column group 4 is connected；The discharge port of Second distillation column group 4 is by pipeline with being set on the thick of 5 top of crude product tank
Product tank feed inlet 11 is connected, the charging that the crude product tank discharge port 12 set on 5 bottom of crude product tank passes through pipeline and third distillation column group 6
Mouth is connected；The first HF is equipped on the pipeline at first reactor feed inlet 7 and adds in mouth 13 and the addition of 1,1,2,3- tetrachloropropylenes
Mouthfuls 14, the 2nd HF, which is equipped with, on the pipeline between the discharge port of first rectifying column group 2 and second reactor top feed mouth 9 adds in
Mouth 15.
The pipe between mouth 13 and 1,1,2,3- tetrachloropropylenes addition mouth 14 and first reactor feed inlet 7 is added in the first HF
Road is equipped with the first preheater 16, and the second preheater 17 is equipped on the pipeline at second reactor top feed mouth 9.
The first rectifying column group 2 includes the No.1 rectifying column 18 being arranged in series and No. two rectifying columns 19, first reactor
Discharge port 8 is connected by pipeline with the No.1 rectifying column feed inlet 20 set on 18 middle part of No.1 rectifying column, set on No.1 rectifying column
The No.1 rectifying column discharge port 21 of 18 bottoms passes through pipeline and No. two rectifying column feed inlets 22 set on No. two 19 middle parts of rectifying column
It is connected, No. two rectifying column discharge ports 23 set on No. two 19 tops of rectifying column pass through pipeline and second reactor top feed mouth 9
It is connected.
The Second distillation column group 4 includes 24, No. four rectifying columns 25 of No. three rectifying columns being arranged in series and No. five rectifying columns
26, second reactor discharge port 10 is connected by pipeline with No. three rectifying column feed inlets 27 set on No. three 24 middle parts of rectifying column,
No. three rectifying column discharge ports 28 set on No. three 24 bottoms of rectifying column pass through pipeline and No. four in the middle part of No. four rectifying columns 25
Rectifying column feed inlet 29 is connected, and No. four rectifying columns top discharge port 30 at the top of No. four rectifying columns 25 is by pipeline with being set on
The crude product tank feed inlet 11 at 5 top of crude product tank is connected, No. four rectifier bottoms discharge ports 32 set on No. four 25 bottoms of rectifying column
It is connected by pipeline with No. five rectifying column feed inlets 33 set on No. five 26 middle parts of rectifying column, at the top of No. five rectifying columns 26
Discharge port 34 passes through pipeline and 35 phase of feed inlet in the middle part of the second reactor at 3 middle part of second reactor at the top of No. five rectifying columns
Even, set on No. five rectifier bottoms discharge ports 36 of No. five 26 bottoms of rectifying column by pipeline and set on 3 top of second reactor
Second reactor top feed mouth be connected.
The third distillation column group 6 includes No. six rectifying columns 38 being arranged in series and No. seven rectifying columns 39, set on No. six essences
No. six rectifying column feed inlets 40 for evaporating 38 middle part of tower are connected by pipeline with crude product tank discharge port 12, set on No. six 38 bottoms of rectifying column
No. six rectifying column discharge ports 41 in portion are connected by pipeline with No. seven rectifying column feed inlets 42 set on No. seven 39 middle parts of rectifying column,
No. seven rectifying column discharge ports 43 are equipped at the top of No. seven rectifying columns 39.
The first reactor 1 and second reactor 3 are calandria type fixed bed reactor, and second reactor 3 is two-part
Calandria type fixed bed reactor.
The method for preparing 2,3,3,3- tetrafluoropropenes using the device of above-mentioned 2,3,3,3- tetrafluoropropene of preparation, including as follows
Step：
(1) first by 100ml Al2O3/ Cr catalyst (load capacity of Cr is 3wt%) is packed into the hypomere of second reactor, will
100ml Al2O3/ TI catalyst (load capacity of TI is 5wt%) is packed into the epimere of second reactor；Again by 200ml chromium-magnesium-iron
(by mass percentage, catalyst composition is catalyst：Chromium oxide 70%, magnesia 10%, iron oxide 20%) it is packed into first instead
It answers in device；Then first reactor is warming up to 300 DEG C, is passed through HF and nitrogen is activated, HF flows：100g/h, nitrogen stream
Amount：2L/min, soak time are 48 hours；Second reactor is warming up to 380 DEG C, is passed through HF and nitrogen is activated, HF flows：
100g/h, nitrogen flow：3L/min, soak time are 40 hours, and the activation of catalyst of two reactors is completed.First reactor
When heating up with second reactor, room temperature to 150 DEG C of heating rates, 2 DEG C/min, 150 DEG C or more heating rates, 1 DEG C/min；
By hydrogen fluoride and 1, after 1,2,3- tetrachloropropylene is preheating to 100-200 DEG C, it is passed through first reaction at 10: 1 in molar ratio
Device feed inlet 7 reacts under catalyst effect, and controlling reaction temperature is 200~350 DEG C, reaction velocity for 400~
800/h obtains first reactor reaction product from the outflow of first reactor discharge port 10, and first reactor obtains HCFO-
1233xf, a small amount of TCP, hydrogen chloride and hydrogen fluoride mixture, formed through gas chromatographic analysis organic matter, be shown in Table 1；
(2) the first reactor reaction product that step (1) obtains is passed through No.1 rectifying column feed inlet 20 to detach, is obtained
To No.1 rectifying column group tower reactor component and No.1 rectifying column group overhead fraction；No.1 rectifying column group tower reactor component is from No.1 rectifying column
Discharge port 21 exits into No. two rectifying column feed inlets 22 and carries out rectifying, and No. two tower bottom of rectifying tower components are HF, and it is anti-to return to first
Answering device 1, the reaction was continued；No. two rectifying column group overhead fractions are the chloro- 3,3,3- trifluoro propenes of 2- and a small amount of HF；
(3) it is 2- chloro-3,3,3 ,-trifluoropropenes and a small amount of HF by No. two rectifying column group overhead fractions, and from Second distillation column
After the HF that group is sent is preheating to 100-200 DEG C together, the is sent into according to 2- chloro-3,3,3 ,-trifluoropropenes and HF molar ratios 1: 1~2
Two reactor head feed inlets 9；Second reactor is divided into upper and lower two sections, HF and 2- chloro-3,3,3 ,-trifluoropropenes are in the second reaction
The reaction temperature of device epimere is 320 DEG C, reaction velocity 600/h, and in second reactor hypomere, the reaction was continued, in second reactor
Bottom obtains product, and the product is 2,3,3, the 3- tetrafluoropropenes removed after HF；The second reactor epimere loads Al2O3/
Tl catalyst, hypomere load Al2O3/ Cr catalyst；The Al2O3The load capacity of Cr is 3-6wt% in/Cr catalyst, described
Al2O3The load capacity of Tl is 5-8wt% in/Tl catalyst；Second reactor is obtained containing HFO-1234yf, R244bb, on a small quantity
The mixture of HCFO-1233xf, hydrogen chloride and hydrogen fluoride form through gas chromatographic analysis organic matter, are shown in Table 1；
Table 1：1 reactor outlet organic matter of embodiment forms
| Project | HCFO-1233xf | R244bb | HCFO-1234yf | TCP | It is other |
| One anti-outlet (wt%) | 98.78 | - | - | 1.18 | 0.04 |
| Two anti-outlets (wt%) | 11.76 | 21.35 | 66.85 | - | 0.04 |
(4) the second reactor bottom product that step (3) obtains from second reactor discharge port 10 is flowed out, is passed through No. three
Rectifying column feed inlet 27 carries out rectifying, obtains No. three rectifying column group tower reactor components and No. three rectifying column group overhead fractions, No. three essences
Tower group overhead fraction is evaporated for HCl, and separately washing obtains hydrochloric acid；No. three rectifying column group tower reactor components are from No. three rectifying column discharge ports 28
It exits into No. four rectifying column feed inlets 29 and carries out rectifying, obtain No. four tower bottom of rectifying tower components and No. four rectifying column tower tops evaporate
Point, No. four rectifying tower tops are 2,3,3,3- tetrafluoropropenes, wash to obtain 2,3,3,3- tetrafluoropropene crude products through scale, are sent into
Crude product tank 5, No. four tower bottom of rectifying tower components are sent into No. five rectifying columns 26 and are detached, and obtain No. five tower bottom of rectifying tower components and five
Number rectifying tower tops, No. five rectifying tower tops return to second reactor top feed mouths 9, and the reaction was continued, No. five rectifying
Tower tower reactor component returns to second reactor middle part feed inlet 35, and the reaction was continued；
(5) 2,3,3, the 3- tetrafluoropropene crude products that step (4) obtains are squeezed into No. six rectifying columns 38, in tower top pressure and temperature
Degree is respectively 0.4-0.6Mpa, and after removing fixed gas at 50-70 DEG C, tower reactor component is sent into No. seven rectifying column feed inlets 42 in tower top
Pressure and temperature is respectively 0.4-0.6Mpa, at 50-70 DEG C rectifying detach, obtain 2,3,3,3- from No. seven rectifying column discharge ports 43
Tetrafluoropropene product.
Part is not described in detail for the utility model, is the known technology of those skilled in the art of the present technique.Finally illustrate, with
Upper embodiment is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although with reference to preferred embodiment to the utility model
It is described in detail, it will be understood by those of ordinary skill in the art that, the technical solution of the utility model can be repaiied
Change or equivalent replacement, without departing from the objective and range of technical solutions of the utility model, should all cover in the utility model
Right in.
Claims (6)
1. a kind of device for preparing 2,3,3,3- tetrafluoropropenes, it is characterized in that：Including the front and rear first reactor set gradually,
One rectifying column group, second reactor, Second distillation column group, crude product tank and third distillation column group, set at the top of first reactor
There is first reactor feed inlet, the first reactor discharge port set on first reactor bottom passes through pipeline and first rectifying column group
Feed inlet be connected, the discharge port of first rectifying column group pass through pipeline at the top of the second reactor at the top of second reactor
Feed inlet is connected, and the second reactor discharge port set on second reactor bottom passes through pipeline and the feed inlet of Second distillation column group
It is connected；The discharge port of Second distillation column group is connected by pipeline with the crude product tank feed inlet set on crude product tank top, set on crude product
The crude product tank discharge port of pot bottom is connected by pipeline with the feed inlet of third distillation column group；At first reactor feed inlet
Pipeline is equipped with the first HF and adds in mouth and 1, and 1,2,3- tetrachloropropylene adds in mouth, anti-in the discharge port of first rectifying column group and second
The pipeline between device top feed mouth is answered to be equipped with the 2nd HF and adds in mouth.
2. the device according to claim 1 for preparing 2,3,3,3- tetrafluoropropenes, it is characterized in that：The first HF add in mouth and
The pipeline that 1,1,2,3- tetrachloropropylene is added between mouth and first reactor feed inlet is equipped with the first preheater, in the second reaction
Pipeline at device top feed mouth is equipped with the second preheater.
3. the device according to claim 1 for preparing 2,3,3,3- tetrafluoropropenes, it is characterized in that：The first rectifying column group
Including the No.1 rectifying column being arranged in series and No. two rectifying columns, first reactor discharge port is by pipeline with being set on No.1 rectifying column
The No.1 rectifying column feed inlet at middle part is connected, set on No.1 rectifier bottoms No.1 rectifying column discharge port by pipeline with being set on
No. two rectifying column feed inlets in the middle part of No. two rectifying columns are connected, and No. two rectifying column discharge ports at the top of No. two rectifying columns pass through
Pipeline is connected with second reactor top feed mouth.
4. the device according to claim 1 for preparing 2,3,3,3- tetrafluoropropenes, it is characterized in that：The Second distillation column group
Including No. three rectifying columns, No. four rectifying columns and No. five rectifying columns being arranged in series, second reactor discharge port is by pipeline with setting
No. three rectifying column feed inlets in the middle part of No. three rectifying columns are connected, and No. three rectifying column discharge ports set on No. three rectifier bottoms lead to
Piping is connected with No. four rectifying column feed inlets in the middle part of No. four rectifying columns, No. four rectifying at the top of No. four rectifying columns
Top of tower discharge port is connected by pipeline with the crude product tank feed inlet set on crude product tank top, set on the four of No. four rectifier bottoms
Number rectifier bottoms discharge port is connected by pipeline with No. five rectifying column feed inlets in the middle part of No. five rectifying columns, set on No. five
Discharge port passes through pipeline and the second reactor middle part in the middle part of second reactor at the top of No. five rectifying columns at the top of rectifying column
Feed inlet is connected, and No. five rectifier bottoms discharge ports set on No. five rectifier bottoms are by pipeline and set on second reactor top
The second reactor top feed mouth in portion is connected.
5. the device according to claim 1 for preparing 2,3,3,3- tetrafluoropropenes, it is characterized in that：The third distillation column group
Including No. six rectifying columns being arranged in series and No. seven rectifying columns, No. six rectifying column feed inlets in the middle part of No. six rectifying columns pass through
Pipeline is connected with crude product tank discharge port, and No. six rectifying column discharge ports set on No. six rectifier bottoms are by pipeline and set on No. seven
No. seven rectifying column feed inlets in the middle part of rectifying column are connected, and No. seven rectifying column discharge ports are equipped at the top of No. seven rectifying columns.
6. the device according to claim 1 for preparing 2,3,3,3- tetrafluoropropenes, it is characterized in that：The first reactor and
Second reactor is calandria type fixed bed reactor, and second reactor is two-part calandria type fixed bed reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721339777.6U CN207512102U (en) | 2017-10-18 | 2017-10-18 | A kind of device for preparing 2,3,3,3- tetrafluoropropenes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721339777.6U CN207512102U (en) | 2017-10-18 | 2017-10-18 | A kind of device for preparing 2,3,3,3- tetrafluoropropenes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207512102U true CN207512102U (en) | 2018-06-19 |
Family
ID=62535105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721339777.6U Active CN207512102U (en) | 2017-10-18 | 2017-10-18 | A kind of device for preparing 2,3,3,3- tetrafluoropropenes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207512102U (en) |
-
2017
- 2017-10-18 CN CN201721339777.6U patent/CN207512102U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102001910B (en) | Method for preparing 2,3,3,3-tetrafluoropropene | |
| CN104520259A (en) | Process for producing 2,3,3,3-tetrafluoropropene | |
| CN102001911A (en) | Method for preparing 2,3,3,3-tetrafluoropropene | |
| CN101544536A (en) | Process for the manufacture of fluorinated olefins | |
| CN101215220A (en) | Preparation method for 1,1,1,3-tetrafluoropropene | |
| CN109438170B (en) | Preparation method of 2,3,3, 3-tetrafluoropropene | |
| CN103880590B (en) | A kind of technique preparing 1,3,3,3-tetrafluoropropene | |
| CN104710274B (en) | Process for co-producing 1,3,3,3-tetrafluoropropene and/or 2,3,3,3-tetrafluoropropene | |
| CN107652159A (en) | A kind of device and method for preparing 2,3,3,3 tetrafluoropropenes | |
| Qian et al. | Selective hydrogenation and separation of C3 stream by thermally coupled reactive distillation | |
| CN105399598A (en) | 1,1,1,3,3-perfluoropropane preparation device and preparation method | |
| CN106242942A (en) | The method for continuously synthesizing of a kind of 1 chlorobutane and the equipment of production thereof | |
| US9346724B2 (en) | Method for preparing 2,3,3,3-tetrafluoropropene | |
| CN103508843B (en) | A kind of gas phase fluorination prepares the method for chloro-3,3, the 3-trifluoro propenes of 1,2-bis- | |
| CN207512102U (en) | A kind of device for preparing 2,3,3,3- tetrafluoropropenes | |
| CN109384640B (en) | Preparation device and preparation method of 2,3,3, 3-tetrafluoropropene | |
| CN105753636B (en) | The separation method of the chloro- 1,1,1,2- tetrafluoropropanes of 2- and the chloro- 3,3,3- trifluoro propenes of 2- | |
| CN104209144B (en) | The preparation method of a kind of catalyst system and catalyzing and preparation method thereof and vinylacetylene | |
| CN108658722A (en) | The synthetic method of one kind 1,2,3- trichloropropanes | |
| CN106883095A (en) | A kind of technique for producing trans 1,3,3,3 tetrafluoropropene | |
| CN112537997B (en) | Method and device for co-production of 3,3, 3-trifluoropropene and 2-chloro-3, 3, 3-trifluoropropene | |
| CN105985217B (en) | Reaction system and its application of reactant utilization rate are improved in a kind of production of chloromethanes | |
| CN104607229B (en) | It is a kind of to be used for nitrogen modification graphite catalyst of the trifluoro propene of 1 chlorine 3,3,3 production and preparation method and application | |
| CN102320917A (en) | Synthesis method of 2,3-dichloro-1,1,1-trifluoropropane | |
| CN207713657U (en) | A kind of optical chlorinating reaction system of bis- chloro- 1,1,1- trifluoros propane of continuous production 2,3- |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |