GB724155A - Improvements in or relating to recovery of tetraalkyllead compounds - Google Patents
Improvements in or relating to recovery of tetraalkyllead compoundsInfo
- Publication number
- GB724155A GB724155A GB19666/52A GB1966652A GB724155A GB 724155 A GB724155 A GB 724155A GB 19666/52 A GB19666/52 A GB 19666/52A GB 1966652 A GB1966652 A GB 1966652A GB 724155 A GB724155 A GB 724155A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tetra
- lead
- acid
- water
- parts
- 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
- 150000001875 compounds Chemical class 0.000 title 1
- 238000011084 recovery Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 8
- 239000007787 solid Substances 0.000 abstract 6
- 230000029936 alkylation Effects 0.000 abstract 5
- 238000005804 alkylation reaction Methods 0.000 abstract 5
- 239000002002 slurry Substances 0.000 abstract 5
- 239000000243 solution Substances 0.000 abstract 5
- 239000002253 acid Substances 0.000 abstract 4
- 229940100198 alkylating agent Drugs 0.000 abstract 4
- 239000002168 alkylating agent Substances 0.000 abstract 4
- 239000007788 liquid Substances 0.000 abstract 4
- 239000011260 aqueous acid Substances 0.000 abstract 3
- 239000007864 aqueous solution Substances 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 3
- MRMOZBOQVYRSEM-UHFFFAOYSA-N tetraethyllead Chemical group CC[Pb](CC)(CC)CC MRMOZBOQVYRSEM-UHFFFAOYSA-N 0.000 abstract 3
- 238000002360 preparation method Methods 0.000 abstract 2
- 239000012066 reaction slurry Substances 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical class O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 229910052783 alkali metal Inorganic materials 0.000 abstract 1
- 229910000573 alkali metal alloy Inorganic materials 0.000 abstract 1
- 150000001340 alkali metals Chemical class 0.000 abstract 1
- 125000005907 alkyl ester group Chemical group 0.000 abstract 1
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 abstract 1
- OLOAJSHVLXNSQV-UHFFFAOYSA-N diethyl(dimethyl)plumbane Chemical compound CC[Pb](C)(C)CC OLOAJSHVLXNSQV-UHFFFAOYSA-N 0.000 abstract 1
- 229960003750 ethyl chloride Drugs 0.000 abstract 1
- -1 hydrochloric Chemical class 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 150000007522 mineralic acids Chemical class 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- XONPDZSGENTBNJ-UHFFFAOYSA-N molecular hydrogen;sodium Chemical compound [Na].[H][H] XONPDZSGENTBNJ-UHFFFAOYSA-N 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 1
- DMTMQVNOOBTJCV-UHFFFAOYSA-N tetra(propan-2-yl)plumbane Chemical group CC(C)[Pb](C(C)C)(C(C)C)C(C)C DMTMQVNOOBTJCV-UHFFFAOYSA-N 0.000 abstract 1
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 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
Tetra-alkyl lead is prepared by reacting lead-alkali metal alloy with a substantial excess of a liquid alkylating agent in the form of liquid alkyl ester of an inorganic acid and recovering the tetra-alkyl lead from the alkylation slurry comprising a solution of the tetra-alkyl lead in the liquid alkylating agent and solids from the alkylation, said solids including alkaline reacting solids, by mixing with water in the proportions of at least one mol. of water to one mol. of alkaline reacting components expressed as alkali metal, then mixing with dilute aqueous acid to neutralize the solution so that the aqueous solution has a pH less than 7, the aqueous acid and excess water being not above the ratio by volume of 50 parts of acid and water p to 100 parts of slurry, and floating off the tetraalkyl lead solution from the aqueous solution and the solids. By substantial excess of a liquid alkylating agent is meant of the order of 1700 per cent of the theoretical requirement for complete alkylation of the lead. All acid-reacting substances which are water soluble may be used in the above process, e.g. mineral acids such as hydrochloric, sulphuric and nitric acids, and acid-reacting salts such as sodium hydrogen <PICT:0724155/IV (b)/1> sulphate. The process may be used for the preparation of tetra-ethyl, tetra-methyl, tetra-isopropyl and dimethyl-diethyl lead. In the preparation of tetra-ethyl lead using ethyl chloride as the alkylating agent, the amount of water added may be from 2.5 to 10 parts by volume to 100 parts by volume of reaction slurry, acid is then added to bring the pH of the aqueous solution below 7 so that the aqueous acid and excess water are in the volume proportions of from 10 to 50 parts to 100 parts of reaction slurry e.g., from 10 to 33 parts may be used. A number of examples are given. The Figure illustrates a suitable apparatus for treating the alkylation slurries by the above process. The alkylation slurry is fed through line 12 into a pretreating vessel 4 fitted with agitators, and water is introduced through line 13. An overflow line 14 conducts the treated slurry to the top portion of the mixing chamber 1 fitted with agitators. The dilute acid solution is introduced through line 15. The resulting mixture is transferred to the settling column 3 with the aid of the lateral transfer chamber 2 and screw 7. In the settling column, the solution of tetra-alkyl lead 29 is at the top of the column and is withdrawn through line 17, the aqueous layer 30 is withdrawn through line 21, and the solids are removed at intervals by opening valve 23 and collecting the solids in hopper 24.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US724155XA | 1951-08-31 | 1951-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB724155A true GB724155A (en) | 1955-02-16 |
Family
ID=22107410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19666/52A Expired GB724155A (en) | 1951-08-31 | 1952-08-05 | Improvements in or relating to recovery of tetraalkyllead compounds |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE940298C (en) |
| FR (1) | FR1067955A (en) |
| GB (1) | GB724155A (en) |
| NL (2) | NL171699B (en) |
-
0
- NL NL86976D patent/NL86976C/xx active
- NL NLAANVRAGE7206611,B patent/NL171699B/en unknown
-
1952
- 1952-08-05 GB GB19666/52A patent/GB724155A/en not_active Expired
- 1952-08-23 FR FR1067955D patent/FR1067955A/en not_active Expired
- 1952-08-29 DE DEE5943A patent/DE940298C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL171699B (en) | |
| FR1067955A (en) | 1954-06-21 |
| NL86976C (en) | |
| DE940298C (en) | 1956-03-15 |
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