EP1480908A1 - Procede de sechage de chlorure d hydrogene provenant de solutions aqueuses chlorhydriques - Google Patents
Procede de sechage de chlorure d hydrogene provenant de solutions aqueuses chlorhydriquesInfo
- Publication number
- EP1480908A1 EP1480908A1 EP03717366A EP03717366A EP1480908A1 EP 1480908 A1 EP1480908 A1 EP 1480908A1 EP 03717366 A EP03717366 A EP 03717366A EP 03717366 A EP03717366 A EP 03717366A EP 1480908 A1 EP1480908 A1 EP 1480908A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydrogen chloride
- drying
- anhydrous
- cacl
- hci
- 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.)
- Withdrawn
Links
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 41
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910000041 hydrogen chloride Inorganic materials 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001035 drying Methods 0.000 title claims abstract description 17
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract 3
- 239000007789 gas Substances 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000001110 calcium chloride Substances 0.000 abstract 1
- 229910001628 calcium chloride Inorganic materials 0.000 abstract 1
- 235000011148 calcium chloride Nutrition 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- -1 aromatic chlorinated hydrocarbons Chemical class 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920000316 Poly pentamethylene hexamethylene dicarbamate Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000005340 laminated glass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/07—Purification ; Separation
- C01B7/0706—Purification ; Separation of hydrogen chloride
- C01B7/0718—Purification ; Separation of hydrogen chloride by adsorption
Definitions
- the present invention relates to a method for drying hydrogen chloride (HCl gas) from aqueous hydrochloric solutions (of different concentrations) obtained in particular during the recovery of chlorinated residues (HRV).
- HCl gas hydrogen chloride
- HRV chlorinated residues
- chlorinated organic compounds generates abundant quantities of by-products and residues often containing chlorine.
- residues can be present either in the form of a gas, for example in the case of the manufacture of vinyl chloride, or of its polymers or copolymers, or in the form of liquid and / or of tarry solids obtained in the manufacture.
- aliphatic, cycloaliphatic, and / or aromatic chlorinated hydrocarbons aliphatic, cycloaliphatic, and / or aromatic chlorinated hydrocarbons.
- the composition of these chlorinated residues varies according to their origin. Certain residues include chlorinated tar products, at least some of the constituents of which contain more than 7 carbon atoms per molecule.
- Other chlorinated residues include chlorinated C compounds and / or chlorinated C 6 compounds.
- chlorinated residues can be accompanied by other compounds comprising chlorinated C1 to C constituents.
- chlorinated residues may also include polychlorinated biphenyls (PCBs) used as dielectric and cooling fluids and which one wishes to get rid of given the ban on the use of these products.
- PCBs polychlorinated biphenyls
- the burning of these chlorinated liquid and / or gaseous residues is carried out by the applicant in the presence of an excess of air and water at temperatures ranging from 900 ° C to 1450 ° C, and generally, included between 1,200 ° C and 1,300 ° C in an installation comprising in particular a burner into which chlorine residues are injected and an oxidizer; said burner being in connection with an oven.
- the hot gases leaving the furnace leave part of their sensible heat in a boiler supplying steam and are then suddenly cooled in a quenching reactor.
- the hydrogen chloride formed is absorbed in absorbers, which leads to aqueous solutions commercial hydrochloric acid concentrates at around 30% by weight of HCl. Any chlorine formed is absorbed in an alkaline aqueous solution.
- aqueous hydrochloric solutions can be sold as is for applications such as neutralization of alkaline effluents, preparations of metal chlorides, attack of metals, or can be treated to lead to more or less anhydrous hydrogen chloride.
- HCI gas can be used in particular for the manufacture of vinyl chloride obtained by thermal cracking of 1,2-dichloroethane, which is synthesized in particular by oxychlorination of ethylene, depending on the reaction:
- the operation is carried out according to the process described below, shown diagrammatically in FIG. 1.
- the 30% hydrochloric aqueous solution coming from absorbers of an HRV unit is directed to a concentration column (1) then then to a distillation column ( 2).
- the HCl gas obtained in (9) contains approximately 50 to 150 pp of water.
- the Applicant has found that the use of such a gas for the oxychlorination of ethylene leads to significant corrosion problems of the compressors used to bring HCl gas to a (operating) pressure of approximately 6 to 7 bars. These compressor corrosions lead to lower compression ratios leading to frequent shutdowns for reconditioning. This results in high and costly maintenance.
- This water content in HCI gas can be easily measured by determining the dew point (or starting liquefaction temperature of acidic water) by lowering the temperature of a sample of HCI gas at a given pressure.
- FIG. 2 schematically represents the drying method described in WO 0112541 using H 2 5O 4 which makes it possible to perfect the drying of an HCl gas and to bring its water content less than 0.5 ppm or even less than 0.15 ppm.
- the HCl gas to be treated arrives at (81) in a packed column (92).
- the dry H 2 SO is taken from a storage (82) and then brought to a ventilated tank (84).
- H 2 5O 4 sec (86) is pumped to a liquid ring compressor (88) or it is brought into contact with HCl partially dry gas (90) coming from the head of a first packed absorption column ( 92), which receives HCI gas to be dried (81) and with a stream (94) d ⁇ 2 SO partially wet recycled from a second packed absorption column (96).
- the partially dried HCI (90) from (92) is then dried in (96) to provide anhydrous HCI (98).
- the partially wet H 2 S0 4 at the bottom of (96) partially recycled to said column feeds the compressor (88) via (100) and the column (92) via (102) where it is brought into contact against the current. with the HCl gas stream to be dried (81).
- the wet H 2 50 4 obtained at the bottom of (92) is recycled partly at the top of said column (92) and partly in a stripping column (106) which uses dry air (108) to remove HCI residual wet H 2 SO, which HCI is eliminated at the top (110).
- the wet H 2 SO, free of HCI, is recovered in a storage tank (114) where it is subsequently dried for reuse.
- anhydrous HCl gas can be obtained more simply, obtained during the distillation of aqueous hydrochloric solutions originating in particular from HRV, by avoiding the drawbacks mentioned previously by using, under certain conditions, anhydrous CaCl 2 .
- the subject of the invention is therefore a process for drying hydrogen chloride originating from the distillation of aqueous hydrochloric solutions obtained in particular during the recovery of chlorinated residues, characterized in that said hydrogen chloride is brought into contact with chloride anhydrous calcium (CaC ⁇ z) for a period of time less than or equal to 1 minute and, preferably, between 5 seconds and 45 seconds.
- chloride anhydrous calcium CaC ⁇ z
- the HCI gas comes from a chlorinated residue recovery plant (HRV) as described above and has a water content generally between 150 and 200 ppm.
- the anhydrous CaCl 2 which can be used according to the present invention is found to be in the form of beads with a diameter less than or equal to 5 mm and, preferably, with a diameter ranging from 1 to 5 mm.
- the drying of the hydrogen chloride is carried out at a temperature ranging from -30 ° C to 20 ° C and, preferably, ranging from -15 ° C to -10 ° C. It is generally carried out at a pressure equal to or greater than atmospheric pressure, and preferably at the distillation pressure supplying the HCl humid gas to be dried.
- the residence time or contact time of the gas HCI with the CaCI 2 anhydrous must be sufficient to absorb the residual water. It depends on the load used and the flow rate of humid HCI gas to be dried.
- this time is equal to or less than 1 min, generally, this residence time ranges from 5 sec to 45 sec.
- this residence time ranges from 5 sec to 45 sec.
- the lifetime of the anhydrous CaCI 2 used can be calculated by taking into account the mass of water absorbed per mass of anhydrous CaCI 2 used.
- the Applicant has found that it is necessary to change the load of CaCI 2 when the latter has increased by 30% by weight at most and, preferably, when the load has increased by 25 to 30%.
- the water content in the HCl gas having passed through the CaCI 2 feed can be easily obtained by determining the dew point of the outgoing HCl gas.
- the method according to the present invention can be implemented by means of a device as shown diagrammatically in FIG. 3.
- a vertical cylindrical column (01) comprising at least one basket (02) containing the charge of anhydrous CaCl 2 , having at its base a bottom grid (03) provided with interlaced strips and a support grid (04) on which a canvas (05); at the upper part of said basket also rests on the load of CaCl 2 a fabric (06);
- a cylindrical bottom (07) provided with an HCI gas inlet (08) in junction with an injection “saber” (09) provided with staggered holes (not shown in FIG. 3), and a purge (10); - a cylindrical cap (11) provided with a dry HCI outlet (12) and lifting lugs (13).
- the fabrics (04) and (05) are made of a material resistant to HCl and have meshes of diameter equal to approximately 1 mm.
- the charge of CaC ⁇ z is easily replaced due to the simplicity of the device used.
- This replacement consists of removing the cap (11), removing the basket containing the used charge and replacing a new basket containing a new charge of CaCI 2 .
- the cylindrical column (01), the bottom (06), the cap (10), as well as the injection saber (08) and the grids (03) and (04) are made of corrosion resistant materials such as ebonity steel. , polypropylene wrapped in a composite material.
- the basket (s) is (are) made of high density polypropylene
- the process according to the invention has great flexibility, has the advantage of using a simple and inexpensive device which can be easily inserted into existing units and results in an HCl gas having water contents of less than 20 ppm or even less than 10 ppm.
- the bottom grids (03) have an outside diameter of 0.905 m and the support grids (04) have an outside diameter of 0.91 m;
- the fabrics (04) and (05) have meshes of diameter equal to 1 mm and are made of PPHD.
- the column is made of high density polypropylene, wrapped in a polyester glass laminate.
- Each basket is loaded with 1.3 tonnes of anhydrous CaC ⁇ z which is in the form of beads from 1 to 5 mm in diameter.
- the HCl gas to be dried comes from the distillation of hydrochloric solutions from an HRV unit as described above and shown diagrammatically in Figure 1 (outlet (7)).
- This HCl gas has an average water content equal to 200 ppm and is introduced in (08) at a flow rate varying between 0.5 and 2.5 t / h at a temperature of -13 ° C.
- the pressure in the device is 0.8 bar relative.
- the water content in HCI leaving at (12) is determined periodically by the dew point method and a dew point of -24 ° C. is found (measured at atmospheric pressure), which corresponds to a water content about 15 ppm.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Drying Of Gases (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0202011 | 2002-02-18 | ||
| FR0202011A FR2836139B1 (fr) | 2002-02-18 | 2002-02-18 | Procede de sechage de clorure d'hydrogene provenant de solutions aqueuses chlorhydriques |
| PCT/FR2003/000307 WO2003070630A1 (fr) | 2002-02-18 | 2003-01-31 | Procede de sechage de chlorure d'hydrogene provenant de solutions aqueuses chlorhydriques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1480908A1 true EP1480908A1 (fr) | 2004-12-01 |
Family
ID=27636261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03717366A Withdrawn EP1480908A1 (fr) | 2002-02-18 | 2003-01-31 | Procede de sechage de chlorure d hydrogene provenant de solutions aqueuses chlorhydriques |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1480908A1 (fr) |
| AU (1) | AU2003222351A1 (fr) |
| FR (1) | FR2836139B1 (fr) |
| WO (1) | WO2003070630A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10477883B2 (en) | 2015-08-25 | 2019-11-19 | Cornelius, Inc. | Gas injection assemblies for batch beverages having spargers |
| US10785996B2 (en) | 2015-08-25 | 2020-09-29 | Cornelius, Inc. | Apparatuses, systems, and methods for inline injection of gases into liquids |
| US11040314B2 (en) | 2019-01-08 | 2021-06-22 | Marmon Foodservice Technologies, Inc. | Apparatuses, systems, and methods for injecting gasses into beverages |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114671405A (zh) * | 2022-05-07 | 2022-06-28 | 鲁西化工集团股份有限公司硅化工分公司 | 一种甲烷氯化物工艺副产盐酸制备高纯氯化氢工艺 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB648706A (en) * | 1940-12-10 | 1951-01-10 | Morton Salt Co | Improvements in or relating to the distillation of hydrochloric acid |
| GB656757A (en) * | 1947-11-17 | 1951-08-29 | Bataafsche Petroleum | Process for the separation of olefin-hydrogen halide mixtures by distillation |
| DD126006A1 (fr) * | 1976-05-06 | 1977-06-08 | ||
| DD238604A1 (de) * | 1985-06-26 | 1986-08-27 | Kali Veb K | Verfahren zur herstellung reiner konzentrierter salzsaeure aus unterazeotroper abfallsaeure |
| JPH11139805A (ja) * | 1997-07-29 | 1999-05-25 | Millipore Corp | ハロゲン化水素から水分を除去するための組成物とその方法 |
| US5958356A (en) * | 1997-11-05 | 1999-09-28 | Air Products And Chemicals, Inc. | Method for removal of moisture from gaseous HCl |
| AU6512200A (en) * | 1999-08-17 | 2001-03-13 | Dow Chemical Company, The | Production of anhydrous hydrogen chloride from byproduct or waste chlorinated materials |
-
2002
- 2002-02-18 FR FR0202011A patent/FR2836139B1/fr not_active Expired - Fee Related
-
2003
- 2003-01-31 WO PCT/FR2003/000307 patent/WO2003070630A1/fr not_active Ceased
- 2003-01-31 EP EP03717366A patent/EP1480908A1/fr not_active Withdrawn
- 2003-01-31 AU AU2003222351A patent/AU2003222351A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03070630A1 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10477883B2 (en) | 2015-08-25 | 2019-11-19 | Cornelius, Inc. | Gas injection assemblies for batch beverages having spargers |
| US10785996B2 (en) | 2015-08-25 | 2020-09-29 | Cornelius, Inc. | Apparatuses, systems, and methods for inline injection of gases into liquids |
| US11013247B2 (en) | 2015-08-25 | 2021-05-25 | Marmon Foodservice Technologies, Inc. | Apparatuses, systems, and methods for inline injection of gases into liquids |
| US11040314B2 (en) | 2019-01-08 | 2021-06-22 | Marmon Foodservice Technologies, Inc. | Apparatuses, systems, and methods for injecting gasses into beverages |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003070630A1 (fr) | 2003-08-28 |
| AU2003222351A1 (en) | 2003-09-09 |
| FR2836139B1 (fr) | 2004-10-22 |
| FR2836139A1 (fr) | 2003-08-22 |
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