CN1946659A - Product stream processing methods, product stream processing system and mixtures - Google Patents

Product stream processing methods, product stream processing system and mixtures Download PDF

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Publication number
CN1946659A
CN1946659A CNA2004800406575A CN200480040657A CN1946659A CN 1946659 A CN1946659 A CN 1946659A CN A2004800406575 A CNA2004800406575 A CN A2004800406575A CN 200480040657 A CN200480040657 A CN 200480040657A CN 1946659 A CN1946659 A CN 1946659A
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China
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product
mole
moles
halogen exchange
halogen
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Chinese (zh)
Inventor
V·夏尔马
W·R·洛厄里
S·E·麦凯
B·D·埃弗斯
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EIDP Inc
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Great Lakes Chemical Corp
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C19/00—Acyclic saturated compounds containing halogen atoms
    • C07C19/08—Acyclic saturated compounds containing halogen atoms containing fluorine
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
    • C07C17/20—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
    • C07C17/202—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction
    • C07C17/206—Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms two or more compounds being involved in the reaction the other compound being HX
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/38—Separation; Purification; Stabilisation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/38—Separation; Purification; Stabilisation; Use of additives
    • C07C17/383—Separation; Purification; Stabilisation; Use of additives by distillation

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Product stream processing methods, systems, and mixtures are provided. A reaction product stream can have a first amount of a halogen exchange by product and an azeotropic composition of a halogen exchange reaction product and a halogen donating reactant. A majority of the halogen exchange by-product from the reaction product stream can be removed to produce a mixture. The mixture can include the halogen exchange reaction product, the halogen donating reactant, and a second amount of the halogen exchange by-product that is less than the first amount of the halogen donating reactant. A majority of the halogen exchange reaction product containing less than the azeotropic amount of the halogen donating reactant can be removed from the mixture. Exemplary halogen exchange reaction product, halogen donating reactant and halogen exchange by-product are CH2F2, HF, and HCI respectively.

Description

Product stream processing, product stream system of processing and mixture
Technical field
The present invention relates generally to product stream processing, mixture and system.More particularly, the present invention relates to the halogenated compound product stream processing, mixture and system.
Background of invention
It is found that halogenated compound all is useful especially chemical such as fluorocarbon, hydrofluorocarbons, carbon chlorine fluorine compound and hydrocarbon chlorine fluorine compound.The exemplary application of these chemical comprises the application as solvent, fire-fighting medium and refrigeration agent.May be difficult to produce the halogenated compound that does not contain production reactant and accessory substance.
A lot of halogenated compounds can produce by halogen exchange reaction.A kind of exemplary halogen exchange reaction is CH 2F 2(it is to pass through CH for difluoromethane, production R-32) 2Cl 2(carrene R-30) generates CH with HF chemical combination 2F 2Typically, this reaction is carried out with excessive HF, therefore a large amount of HF and product C H 2F 2Keep together.A lot of documents have been put down in writing CH 2F 2Form azeotropic mixture with HF.Also there is document to put down in writing HF and CH 2F 2The relative maintenance under different temperatures and pressure of azeotropic concentration constant.For example, CH 2F 2The typical concentration that has with the azeotropic mixture of HF is that HF is 1.2% (moles/mole), and surplus is CH 2F 2
The another kind of exemplary azeotrope that produces from halogen exchange reaction is HF and CF 3CFClCF 3(2-chlorine heptafluoro-propane, azeotrope CFC-217ba).There is document to put down in writing the CF that there are 38.4 to 47.9% (moles/mole) in this azeotrope 3CFClCF 3, surplus is HF.
The invention provides improved halogenated compound product stream processing, system and mixture.
Summary of the invention
According to one embodiment of the invention, product stream processing comprises the reacting product stream that the halogen exchange by product that comprises halogen exchange reaction product, halogen supply response thing and first kind of amount is provided.The halogen exchange reaction product of reacting product stream and halogen supply response thing can form Azeotrope compositions, and this Azeotrope compositions contains the halogen exchange reaction product and the halogen supply response thing of azeotropic amount.
Method can comprise removes most halogen exchange by product from reacting product stream, produce intermediate product stream.Intermediate product stream comprises the halogen exchange by product of halogen exchange reaction product, halogen supply response thing and second kind of amount.The second amount of halogen exchange accessory substance is littler than first kind of amount of halogen supply response thing.
Method can also comprise removes most halogen exchange reaction product from intermediate product stream.The halogen exchange reaction product that is removed contains the halogen supply response thing that is lower than the azeotropic amount.
An aspect of of the present present invention comprises providing to have C aX bZ dH (2a+2-b-d)Method with the HY of first product stream of HZ and first kind of amount.C aX bZ dH (2a+2-b-d)Can form the Azeotrope compositions that contains azeotropic amount HZ with HZ.C aX bZ dH (2a+2-b-d)Can be from C aX bY cH (2a+2-b-c)Generate with the halogen exchange reaction of HZ.Remove from the most of HY in first product stream, generation comprises C aX bZ dH (2a+2-b-d), HZ and second amount HY second product stream, described second amount HY is lower than first kind of amount HY.Then, can from second product stream, remove major part and contain the C that is lower than azeotropic amount HZ aX bZ dH (2a+2-b-d)
Embodiment of the present invention can provide the mixture that can use in the product stream process.A kind of exemplary mixture can comprise following and/or basically be made up of following: CH 2F 2, HF and about 10% (moles/mole) be to the HCl of about 15% (moles/mole).
Embodiment of the present invention can also comprise the system that is used for processed products stream.A kind of such system comprises first reacting product stream that contains halogen exchange reaction product, halogen supply response thing and halogen exchange by product.Halogen exchange reaction product and halogen supplying agent can form the Azeotrope compositions of the halogen supplying agent that contains the azeotropic amount.
Described system comprises that also the halogen exchange by product removes part.Described halogen exchange by product is removed part and is configured to remove most halogen exchange by product, and produces second product stream that comprises halogen exchange reaction product, halogen supply response thing and halogen exchange by product.The amount of the halogen exchange accessory substance in second product stream can be lower than the amount of the halogen exchange accessory substance in first reacting product stream.
System can comprise that also the halogen exchange reaction product removes part, and described halogen exchange reaction product is removed part and is configured to produce the halogen exchange reaction product that contains the halogen supply response thing that is lower than the azeotropic amount.
DESCRIPTION OF THE PREFERRED
The invention provides the method, system and the mixture that are used for processed products stream.Aspect of the present invention provides these methods, system and the mixture that is used to produce fluorocarbon, carbon chlorine fluorine compound and hydrofluorocarbons.Aspect concrete, the invention provides the method that is used to process the product stream that contains the halogen exchange reaction product.
With reference to the accompanying drawings, show production system 10.Production system 10 comprises that reacting product stream 12, halogen exchange by product remove part 14, halogen exchange byproduct stream 16 and intermediate product stream 18.System 10 comprises that also the halogen exchange reaction product removes part 20, halogen exchange reaction product stream 22 and excessive response logistics 24.Reacting product stream 12 can comprise the reaction product of halogen exchange reaction.A kind of exemplary halogen exchange reaction can carry out between reactant 28,30 and 32, wherein reactant 28 can be the halogenated compound reactant, reactant 30 can be a halogen supply response thing, and reactant 32 can comprise other reactant and or the useful thinner when carrying out halogen exchange reaction (halogen exchangereactants).
System 10 be can be used according to the invention exemplary production system.Other configuration also is fine.One aspect of the present invention provides system 10 and purposes according to product stream processing of the present invention.
Exemplary halogenated compound reactant comprises having general formula C aX bY cH (2a+2-b-c)Those compounds, wherein in this formula, X can comprise one or more among F, Cl, Br or the I; Y can comprise one or more among Cl, Br or the I; And 1≤a 〉=4,0≤b 〉=9 and 1≤c 〉=10.Exemplary halogenated compound reactant comprises CH 2Cl 2And/or CF 3CCl 2CF 3(CFC-216,2,2-two chloro-HFC-236fa).Halogen exchange reaction can be undertaken by halogenated compound reactant and the reaction of halogen supply response thing.
Exemplary halogen supply response thing comprises those compounds with general formula HZ, and wherein in this formula, Z can comprise one or more among F, Cl or the Br.A kind of exemplary halogen supply response thing comprises HF.Halogenated compound reactant and halogen supply response thing also can react in the presence of other compound.
Operable other reactant and/or diluent comprise that organic diluent is such as CH when carrying out halogen exchange reaction 2F 2Or CF 3CHFCF 3(HFC-227ea, heptafluoro-propane) and/or inorganic diluents are such as Cl 2Or O 2
A kind of exemplary halogen exchange reaction is that the halogenated compound reactant is such as CH 2Cl 2With of the reaction of halogen supply response thing such as HF.This reaction can be carried out in the presence of catalyzer.In addition, in case of necessity, the gas that this reaction can be other carries out under existing, and described other gas can be used for the cooling exothermic reaction in some embodiments.In addition, this reaction can be in gas phase, and liquid phase and liquid/gas carry out in mutually.A kind of exemplary reaction comprises the halogenated compound reactant of gas phase and the reaction of halogen supply response thing in the presence of catalyzer of gas phase.Another exemplary reaction comprises that the both is the halogenated compound reactant and the reaction of halogen supply response thing in the presence of catalyzer of liquid phase.These reactions can produce reacting product stream, such as the described reacting product stream 12 of accompanying drawing.
Normally, reacting product stream 12 can comprise following and/or basically be made up of following: the halogen exchange reaction product is such as C aX bZ dH (2a+2-b-d), halogen supply response thing such as HZ and halogen exchange accessory substance such as HY.In this exemplary formula structure, C aX bZ dH (2a+2-b-d)Can be by C aX bY cH (2a+2-b-c)Produce with the halogen exchange reaction of HZ.Usually, X can comprise one or more among F, Cl, Br or the I; Y can comprise one or more among Cl, Br or the I; Z can comprise one or more among F, Cl or the Br; And 1≤a 〉=4,0≤b 〉=9,1≤c 〉=10 and 1≤d 〉=10.Reacting product stream 12 comprises the halogen exchange reaction product that contains the azeotropic amount and the Azeotrope compositions of halogen supply response thing.A kind of exemplary reacting product stream 12 can comprise C aX bZ dH (2a+2-b-d)And HZ, they can form the Azeotrope compositions that contains azeotropic amount HZ.Reacting product stream 12 can comprise a certain amount of halogen exchange by product, and this amount is more than or equal to the molar equivalent of halogen exchange reaction product amount.For example and just as an example, reacting product stream 12 can comprise the halogen exchange accessory substance HCl of mole, this mole is greater than halogen exchange reaction product C H 2F 2Mole.
The term azeotrope can refer to one or more the halogen exchange reaction product and the constant boiling mixture (constant blowing add mixture) of one or more halogen supply response thing formation.A feature of azeotropic mixture is that it is equivalent to one matter, and reason is that when gas phase is produced by liquid phase part evaporation or distillation it has the composition identical with liquid phase (that is, during distillation, composition can not change).Similarly, the term Azeotrope-like is commonly referred to as arbitrary such mixture of one or more halogen exchange reaction products and halogen supply response thing for current disclosure, and described mixture shows as constant composition basically when boiling.
For example and just as an example, reacting product stream 12 can comprise and contains CH 2F 2Azeotrope compositions with HF.Halogenated compound reactant CH 2Cl 2Can produce with the reaction of halogen supply response thing HF and to comprise following and/or basically by the following product that forms 12: halogen exchange reaction product C H 2F 2, halogen supply response thing HF and halogen exchange accessory substance HCl.Notice it is CH 2F 2Typically comprise HF greater than 1.2% (moles/mole) with the Azeotrope compositions of HF.Azeotrope compositions can be basically by CH 2F 2Form with HF.The invention is not restricted to CH 2F 2Azeotrope compositions with HF.About 1% (moles/mole) that can comprise Azeotrope compositions arrives the halogen exchange reaction product of about 99% (moles/mole) and the halogen supplying agent that about 1% (moles/mole) arrives about 99% (moles/mole).Other composition of not comprising of the formula of Shi Yonging can be suitable for the purifying according to method and system disclosed herein herein.
The halogen exchange by product is removed most of halogen exchange by product that part 14 can be used for removing reacting product stream 12.The halogen exchange accessory substance is removed part 14, and can to produce another kind of product stream be intermediate product stream 18.The halogen exchange by product is removed part 14 can comprise distiller, and this distiller is configured to distillation reaction product stream 12, and produces as the halogen exchange by product 16 of top product and as the intermediate product stream 18 of bottom product.According to an aspect of the present invention, wherein reacting product stream 12 comprises CH 2F 2With the Azeotrope compositions of HF, the halogen exchange accessory substance is removed part 14 and can be configured to be lower than distillation reaction product stream 12 under about 285.4 ° of K or at least 283.2 ° of K temperature.
Halogen exchange byproduct stream 16 can comprise the most of halogen exchange accessory substance that exists in the reacting product stream 12.Intermediate product stream 18 can comprise halogen exchange reaction product, halogen supply response thing and a certain amount of halogen exchange by product.The amount of the halogen exchange by product of intermediate product stream 18 can be lower than the amount of halogen supply response thing.An exemplary composition of intermediate product stream 18 comprises CH 2F 2, HF and about 10% (moles/mole) be to the HCl of about 15% (moles/mole).In additional aspects of the present invention, the halogen exchange by product of second kind of amount can be at least about the intermediate product stream 18 of 10% (moles/mole).
According to an aspect of the present invention, intermediate product stream 18 can comprise and contains CH 2F 2, HF and about 10% (moles/mole) be to the mixture of about 15% (moles/mole) HCl.
Intermediate product stream 18 can be transported to the halogen exchange reaction product and remove part 20.It can be distiller that a kind of exemplary halogen exchange reaction product is removed part 20.Removing part 20 can work under the temperature of about 302.6 ° of K at about 299.8 ° of K.Removing part 20 also can be about 6.2 * 10 5Work under the pressure of Pa.
The halogen exchange product is removed part 20 can be configured to remove halogen exchange reaction product as halogen exchange reaction product stream 22 from intermediate product stream 18.Halogen exchange reaction product stream 22 can be used as overhead stream and removes the part 20 from the halogen exchange reaction product and remove, and excessive response logistics 24 can reclaim and/or recirculation enters in the system.Halogen exchange reaction product stream 22 comprises the halogen exchange reaction product that contains the halogen supply response thing that is lower than the azeotropic amount.For example and just as an example, be CH at the halogen exchange reaction product 2F 2And halogen supply response thing is in the situation of HF, and halogen exchange reaction product stream 22 comprises following and/or basically is made up of following: CH 2F 2With the HF that is lower than 1.2% (moles/mole).One aspect of the present invention also provides a kind of halogen exchange reaction product stream 22, and described halogen exchange reaction product stream 22 comprises CH 2F 2With about 0.1% to the HF that is lower than 1.2% (moles/mole).Halogen exchange reaction product stream 22 also can comprise following and/or basically be made up of following: CH 2F 2, HCl and the HF and about 0.1% that is lower than 1.2% (moles/mole) be to the HF that is lower than about 1.2% (moles/mole).
Excessive response logistics 24 can comprise halogen supply response thing, halogen exchange by product and/or middle halogen exchange reactant.For example, at CH 2F 2From CH 2Cl 2In the situation about producing with the reaction of HF, exemplary intermediate can be CH 2FCl.Excessive response logistics 24 for example can reclaim and/or be recycled in the reactor 26.
Aspect of the present invention further describes with reference to following non-restrictive example.
Initiation material shown in following lot number adds in the Stainless steel 316 distillation column that vacuumizes in advance, and the top diameter of this distillation column is that 300 millimeters and base diameter are 500 millimeters.Described pillar is filled into about 10 meters height with 316 stainless steel Intalox  IT structured packings (available from Koch-Glitsch, North Wichita Kansas, 67220).Distiller remains under the pressure shown in temperature shown in the following lot number and the following lot number.
Below the intermediate product shown in the table 1 remove from the bottom of first distiller.This intermediate product is transported in the after-fractionating device of temperature and pressure shown in the lot number in the following table 1 then.Described after-fractionating device is stainless steel 316 distillation columns, and its top diameter is that 300 millimeters and base diameter are 500 millimeters.This post is filled into about 10 meters height with 316 stainless steel Intalox  IT structured packings (distinguishing from Koch-Glitsch NorthWichita Kansas, 67220).This post remains in the following table 1 by under the temperature and pressure shown in the lot number.
As shown in table 1, HF and halogen exchange product C H in lot number 3 and 4 2F 2Azeotropic content than HF in initial lot number 1 and 2 and halogen exchange product C H 2F 2Azeotropic content little about 10 times.
Table 1
Starting raw material % (moles/mole) Post 1 Intermediate product % (moles/mole) Post 2 Product % (moles/mole)
CH 2F 2 HF HCl Temperature/pressure (° K/Pa) CH 2F 2 HF HCl Temperature/pressure (° K/Pa.) CH 2F 2 HF HCl
Lot number 1 6.25 81.25 12.5 294.3/6.9×10 5 7.1 92.9 Do not find 302.6/6.2×10 5 98 1.2 Do not find
Lot number 2 6.25 81.25 12.5 291.5/6.9×10 5 7.1 92.9 Do not find 299.8/6.2×10 5 98 1.2 Do not find
Lot number 3 6.25 81.25 12.5 285.4/6.9×10 5 6.4 83.5 10 302.6/6.2×10 5 89 0.1 10
Lot number 4 6.25 81.25 12.5 283.2/6.9×10 5 6.1 79 15 299.8/6.2×10 5 84 0.1 15
The present invention has more or less specifically described the feature of structure and method with language.Yet, should be understood that the present invention is not limited to these concrete features that has illustrated and described, because comprising, mode disclosed herein realizes preferred form of the present invention.

Claims (68)

1. the method for processed products stream, this method comprises:
Reacting product stream is provided, described reacting product stream comprises the halogen exchange by product of halogen exchange reaction product, halogen supply response thing and first kind of amount, and wherein said halogen exchange reaction product and halogen supply response thing can form the halogen exchange reaction product that contains the azeotropic amount and the Azeotrope compositions of halogen supply response thing;
From reacting product stream, remove most halogen exchange by product to produce intermediate product stream, described intermediate product stream comprises the halogen exchange by product of halogen exchange reaction product, halogen supply response thing and second kind of amount, and second kind of amount of described halogen exchange by product is lower than first kind of amount of described halogen supply response thing; And
Remove most halogen exchange reaction product from intermediate product stream, the halogen exchange reaction product that wherein is removed comprises the halogen supply response thing that is lower than the azeotropic amount.
2. according to the process of claim 1 wherein that described halogen exchange reaction product comprises CH 2F 2, described halogen supply response thing comprises HF, and described halogen exchange accessory substance comprises HCl.
3. according to the method for claim 2, wherein said reacting product stream is by CH 2Cl 2Provide with the reaction of HF.
4. according to the method for claim 2, wherein said reacting product stream is basically by CH 2F 2, HF and HCl form.
5. according to the method for claim 2, wherein said Azeotrope compositions comprises CH 2F 2And HF.
6. according to the method for claim 5, wherein said Azeotrope compositions comprises the HF greater than 1.2% (moles/mole).
7. according to the method for claim 2, wherein said Azeotrope compositions is basically by CH 2F 2Form with HF.
8. according to the method for claim 2, wherein said intermediate product stream comprises CH 2F 2, HF and about 10% (moles/mole) be to the HCl of about 15% (moles/mole).
9. according to the method for claim 2, the halogen exchange reaction product that wherein is removed comprises CH 2F 2With the HF that is lower than 1.2% (moles/mole).
10. according to the method for claim 2, the halogen exchange reaction product that wherein is removed is basically by CH 2F 2Form with the HF that is lower than 1.2% (moles/mole).
11. according to the method for claim 2, the halogen exchange reaction product that wherein is removed comprises CH 2F 2With about 0.1% (moles/mole) to the HF that is lower than 1.2% (moles/mole).
12. according to the process of claim 1 wherein that first kind of amount of described halogen exchange by product is more than or equal to the molar equivalent of halogen exchange reaction product amount.
13. according to the process of claim 1 wherein that described Azeotrope compositions comprises that about 1% (moles/mole) arrives the halogen exchange reaction product of about 99% (moles/mole) and the halogen supplying agent that about 1% (moles/mole) arrives about 99% (moles/mole).
14. according to the process of claim 1 wherein that removing most halogen exchange by product from described reacting product stream comprises the described reacting product stream of distillation and produce as the halogen exchange by product of top product with as the intermediate product stream of bottoms.
15. according to the method for claim 10, wherein said halogen exchange reaction product comprises CH 2F 2, described halogen supply response thing comprises HF, and described halogen exchange accessory substance comprises HCl.
16. according to the method for claim 15, wherein said distillation is carried out under the temperature that is lower than about 292 ° of K.
17. according to the method for claim 15, wherein said distillation is carried out under at least about the temperature of 283 ° of K.
18. according to the process of claim 1 wherein that the halogen exchange by product of described second kind of amount comprises the intermediate product stream at least about 10% (moles/mole).
19. describedly from intermediate product stream, remove most halogen exchange reaction product and comprise the distillation intermediate product stream and produce halogen exchange reaction product as overhead stream according to the process of claim 1 wherein.
20. the method for a processed products stream, this method comprises:
Provide and contain C aX bZ dH (2a+2-b-d), HZ and first kind amount HY first product stream, described C aX bZ dH (2a+2-b-d)By C aX bY cH (2a+2-b-c)Produce with the halogen exchange reaction of HZ, wherein C aX bZ dH (2a+2-b-d)Can form the Azeotrope compositions that contains azeotropic amount HZ with HZ;
Condition is that X comprises one or more among F, Cl, Br or the I; Condition is that Y comprises one or more among Cl, Br or the I; Condition is that Z comprises one or more among F, Cl or the Br; Wherein X, Y and Z can be identical or different mutually, and condition is 1≤a 〉=4,0≤b 〉=9,1≤c 〉=10 and 1≤d 〉=10;
From first product stream, remove most HY, produce and contain C aX bZ dH (2a+2-b-d), HZ and second amount HY second product stream, the HY of wherein said second amount is lower than the HY of first kind of amount; And
From second product stream, remove most C aX bZ dH (2a+2-b-d), the C that wherein is removed aX bZ dH (2a+2-b-d)Comprise the HZ that is lower than the azeotropic amount.
21. according to the method for claim 20, wherein said C aX bZ dH (2a+2-b-d)Comprise CH 2F 2, HZ comprises HF, and HY comprises HCl.
22. according to the method for claim 21, wherein said C aX bY cH (2a+2-b-c)CH 2Cl 2, and HZ is HF.
23. according to the method for claim 21, wherein said first product stream is basically by CH 2F 2, HF and HCl form.
24. according to the method for claim 21, wherein said Azeotrope compositions comprises CH 2F 2And HF.
25. according to the method for claim 24, wherein said Azeotrope compositions comprises the HF more than or equal to 1.2% (moles/mole).
26. according to the method for claim 21, wherein said Azeotrope compositions is basically by CH 2F 2Form with HF.
27. according to the method for claim 21, wherein said second product stream comprises CH 2F 2, HF and about 10% (moles/mole) be to about 15% (moles/mole) HCl.
28. according to the method for claim 20, first kind of amount of wherein said HY is more than or equal to C aX bZ dH (2a+2-b-d)The molar equivalent of amount.
29. according to the method for claim 20, wherein said Azeotrope compositions comprises that about 1% (moles/mole) is to about 99% (moles/mole) C aX bZ dH (2a+2-b-d)With the HZ of about 1% (moles/mole) to about 99% (moles/mole).
30., wherein from first product stream, remove most HY and comprise that the HY that distills described first product stream and produce as top product flows with second product that produces as bottoms according to the method for claim 20.
31. according to the method for claim 30, wherein C aX bZ dH (2a+2-b-d)Comprise CH 2F 2, HZ comprises HF, and HY comprises HCl.
32. according to the method for claim 31, wherein said distillation is carried out under the temperature that is lower than about 292 ° of K.
33. according to the method for claim 31, wherein said distillation is carried out under at least about the temperature of 283 ° of K.
34. according to the method for claim 20, the HY of wherein said second kind of amount account for second product stream at least about 10% (moles/mole).
35., wherein saidly from second product stream, remove most of HY and comprise described second product stream of distillation and produce CaXbZdH (2a+2-b-d) as overhead stream according to the method for claim 20.
36. according to the method for claim 35, wherein said overhead stream comprises CH 2F 2With the HF that is lower than 1.2% (moles/mole).
37. a method that is used for processed products stream, this method comprises:
First product stream is provided, and described first product stream comprises CH 2F 2, HF and HCl;
Remove at least part of HCl from described first product stream, to produce second product stream, described second product stream comprises CH 2F 2, HF and HCl, wherein HCl accounts for about 10% (moles/mole) of second product stream to about 15% (moles/mole); And
From second product stream, isolate at least part of CH 2F 2
38. according to the method for claim 37, wherein said first product stream is by CH 2Cl 2Provide with the reaction of HF.
39. according to the method for claim 37, wherein said first product stream is basically by CH 2F 2, HF and HCl form.
40. according to the method for claim 37, wherein said first product stream comprises the HCl of certain molar weight, the mole of described HCl is greater than CH 2F 2Mole.
41. according to the method for claim 37, the wherein said section H Cl at least of removing from first product stream comprises described first product stream of distillation and produces as the HCl of top product and produce second product stream as bottoms.
42. according to the method for claim 41, wherein said distillation is carried out under the temperature that is lower than about 292 ° of K.
43. according to the method for claim 41, wherein said distillation is carried out under at least about the temperature of 283 ° of K.
44. according to the method for claim 37, wherein saidly from second product stream, isolate at least part of CH 2F 2Comprise that described second product stream of distillation and generation are as the CH of overhead stream 2F 2
45. according to the method for claim 44, wherein said overhead stream comprises the HF that is lower than 1.2% (moles/mole).
46. according to the method for claim 44, wherein said overhead stream is basically by CH 2F 2, HCl and the HF that is lower than 1.2% (moles/mole) form.
47. according to the method for claim 44, wherein said overhead stream comprises CH 2F 2, HCl and about 0.1% (moles/mole) be to the HF that is lower than 1.2% (moles/mole).
48. according to the method for claim 34, wherein said overhead stream is basically by CH 2F 2Be lower than 1.2% (moles/mole) HF and form.
49. according to the method for claim 34, wherein said overhead stream comprises CH 2F 2With about 0.1% (moles/mole) to the HF that is lower than 1.2% (moles/mole).
50. a mixture, it comprises:
The halogen exchange reaction product;
Halogen supply response thing; With
About 10% (moles/mole) is to the halogen exchange by product of about 15% (moles/mole).
51. according to the mixture of claim 50, wherein said halogen exchange reaction product comprises CH 2CF 2, described halogen supply response thing comprises HF, and described halogen exchange by product comprises HCl.
52. a system that is used for processed products stream, it comprises:
First reacting product stream, it contains halogen exchange reaction product, halogen supply response thing and halogen exchange by product, and wherein said halogen exchange reaction product and halogen supplying agent can form the Azeotrope compositions of the halogen supplying agent with azeotropic amount;
The halogen exchange by product is removed part, described halogen exchange by product is removed part and is configured to remove most halogen exchange by product and produces second product stream that contains halogen exchange reaction product, halogen supply response thing and halogen exchange by product, and the amount of halogen exchange by product was lower than the amount of halogen exchange by product in first reacting product stream during wherein second product flowed; And
The halogen exchange reaction product is removed part, and described halogen exchange reaction product is removed part and is configured to produce the halogen exchange reaction product that contains the halogen supply response thing that is lower than the azeotropic amount.
53. according to the system of claim 51, wherein said halogen exchange reaction product comprises CH 2F 2, described halogen supply response thing comprises HF, and described halogen exchange accessory substance comprises HCl.
54. according to the system of claim 53, wherein said first reacting product stream is by CH 2Cl 2Produce with the reaction of HF.
55. according to the system of claim 53, wherein said first reacting product stream is basically by CH 2F 2, HF and HCl form.
56. according to the system of claim 53, wherein said Azeotrope compositions comprises CH 2F 2And HF.
57. according to the system of claim 53, wherein said second product stream comprises CH 2F 2, HF and about 10% (moles/mole) be to the HCl of about 15% (moles/mole).
58. according to the system of claim 56, wherein said Azeotrope compositions comprises the HF greater than 1.2% (moles/mole).
59. according to the system of claim 53, wherein said Azeotrope compositions is basically by CH 2F 2Form with HF.
60. according to the system of claim 52, wherein said Azeotrope compositions comprises that about 1% (moles/mole) arrives the halogen exchange reaction product of about 99% (moles/mole) and the halogen supplying agent that about 1% (moles/mole) arrives about 99% (moles/mole).
61. according to the system of claim 52, wherein said halogen exchange accessory substance is removed part and comprised distiller, this instrument configuration becomes distillation first product stream and produces as the halogen exchange accessory substance of top product with as second product stream of bottom product.
62. according to the system of claim 60, wherein said halogen exchange reaction product comprises CH 2F 2, described halogen supply response thing comprises HF, and described halogen exchange accessory substance comprises HCl.
63. according to the system of claim 61, wherein said distillation is carried out under the temperature that is lower than about 292 ° of K.
64. according to the system of claim 61, wherein said distillation is carried out under at least about the temperature of 283 ° of K.
65. according to the system of claim 52, wherein said halogen exchange reaction product is removed part and comprised distiller, this instrument configuration becomes can distill described intermediate product stream and produces halogen exchange reaction product as overhead stream.
66. according to the system of claim 65, wherein said overhead stream comprises CH 2F 2With the HF that is lower than 1.2% (moles/mole).
67. according to the system of claim 65, wherein said overhead stream is basically by CH 2F 2Form with the HF that is lower than 1.2% (moles/mole).
68. according to the system of claim 65, wherein said overhead stream comprises CH 2F 2With about 0.1% (moles/mole) to the HF that is lower than 1.2% (moles/mole).
CNA2004800406575A 2004-01-21 2004-01-21 Product stream processing methods, product stream processing system and mixtures Pending CN1946659A (en)

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