GB1208158A - A method of recovering tetraalkyllead - Google Patents
A method of recovering tetraalkylleadInfo
- Publication number
- GB1208158A GB1208158A GB1294268A GB1294268A GB1208158A GB 1208158 A GB1208158 A GB 1208158A GB 1294268 A GB1294268 A GB 1294268A GB 1294268 A GB1294268 A GB 1294268A GB 1208158 A GB1208158 A GB 1208158A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- gas
- organic liquid
- sump
- phase
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 2
- 239000007789 gas Substances 0.000 abstract 15
- 239000007788 liquid Substances 0.000 abstract 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 12
- 239000007791 liquid phase Substances 0.000 abstract 6
- 239000012071 phase Substances 0.000 abstract 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 abstract 3
- 125000000217 alkyl group Chemical group 0.000 abstract 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 239000003517 fume Substances 0.000 abstract 2
- 238000005201 scrubbing Methods 0.000 abstract 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 abstract 1
- PAAZPARNPHGIKF-UHFFFAOYSA-N 1,2-dibromoethane Chemical compound BrCCBr PAAZPARNPHGIKF-UHFFFAOYSA-N 0.000 abstract 1
- 239000012267 brine Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 125000001495 ethyl group Chemical class [H]C([H])([H])C([H])([H])* 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 238000011027 product recovery Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/24—Lead compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,208,158. Recovery of tetra alkyl lead from vent gases. ETHYL CORP. 18 March, 1968 [30 March, 1967; 24 Oct., 1967], No. 12942/68. Heading C2J. Tetra alkyl lead is recovered from vent gases by (a) contacting the vent gas with a precooled organic scrubbing liquid to produce a scrubbed gas phase and a contacted liquid phase; (b) passing contacted liquid phase to an organic liquid sump; (c) removing from said sump a part of the organic liquid therein, cooling it and recycling it for use in step (a); (d) recovering tetra alkyl lead in organic liquid from the sump. The vent gas may be scrubbed with aq. NaOH soln., having a concentration of 1-25% by wt., prior to step (a) and the liquid phase from the scrubbing being passed to the organic liquid sump. For large volumes of vent gas it is preferred to remove the major portion of R 4 Pb by treatment as above and then to contact the scrubbed gas phase from (a) with further precooled liquid to give a second scrubber gas and contacted liquid phases, the latter being passed to a second organic liquid sump. A part of the organic liquid from the second sump is subjected to step (c) above. Apparatus is described for carrying out the process (see Fig.) in which gas enters via line 10 to fume scrubber 11 where the gas is contacted with aq. NaOH to produce a scrubbed gas phase 14 and an aqueous liquid phase 15. Organic liquid 16 is removed via lines 17, 19 to a cooler 20 where it is cooled by brine to a temperature between -10‹ and 50‹ F. Cooled organic liquid enters tower 30 via line 3 where it is brought in contact with scrubbed gas 14 in a countercurrent manner. After contact the organic liquid returns to vessel 13 and settles in liquid 16. R 4 Pb and toluene recovered can be removed via line 35. By use of a weir 40 the organic liquid is retained in vessel 13 except for that removed to product recovery, and. aqueous liquid phase is permitted to overflow into sump 41 from whence it may be recycled to fume scrubber 11 or removed via line 45 and replaced by fresh NaOH via line 46. To prevent building of deposit in tower 30, NaOH is supplied through lines 6 and/or 7. Pure organic liquid is added via lines 66, 47, 48 in order to maintain a constant amount. For large volumes of gas a second contact stage may take place in tower 51 and sump 52 in a similar manner. The organic liquid is preferably ethylene dichloride or dibromide and is cooled sufficiently in step (c) to produce a scrubbed gas phase with a temperature of 30-60‹ F. Preferably the vent gas is initially at a temperature of 80-130‹ F. and the inert gas used is preferably nitrogen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US62701467A | 1967-03-30 | 1967-03-30 | |
| US677714A US3403495A (en) | 1967-10-24 | 1967-10-24 | Tetraalkyllead recovery process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1208158A true GB1208158A (en) | 1970-10-07 |
Family
ID=27090319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1294268A Expired GB1208158A (en) | 1967-03-30 | 1968-03-18 | A method of recovering tetraalkyllead |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1768109B1 (en) |
| FR (1) | FR1559447A (en) |
| GB (1) | GB1208158A (en) |
-
1968
- 1968-03-18 GB GB1294268A patent/GB1208158A/en not_active Expired
- 1968-03-29 FR FR1559447D patent/FR1559447A/fr not_active Expired
- 1968-04-01 DE DE19681768109 patent/DE1768109B1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE1768109B1 (en) | 1970-09-16 |
| FR1559447A (en) | 1969-03-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |