US1324300A - butler - Google Patents
butler Download PDFInfo
- Publication number
- US1324300A US1324300A US1324300DA US1324300A US 1324300 A US1324300 A US 1324300A US 1324300D A US1324300D A US 1324300DA US 1324300 A US1324300 A US 1324300A
- Authority
- US
- United States
- Prior art keywords
- lead
- product
- making
- compound
- arsenic acid
- 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 - Lifetime
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- VWDWKYIASSYTQR-UHFFFAOYSA-N Sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 20
- LPXPTNMVRIOKMN-UHFFFAOYSA-M Sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 20
- 239000006227 byproduct Substances 0.000 description 20
- VOTFXKJPNQELOG-UHFFFAOYSA-N arsenic acid Chemical compound O[As](=O)=O VOTFXKJPNQELOG-UHFFFAOYSA-N 0.000 description 16
- 229940000488 arsenic acid Drugs 0.000 description 16
- UWRBYRMOUPAKLM-UHFFFAOYSA-L Lead arsenate Chemical compound [Pb+2].O[As]([O-])([O-])=O UWRBYRMOUPAKLM-UHFFFAOYSA-L 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 14
- 150000002611 lead compounds Chemical class 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 12
- 235000010344 sodium nitrate Nutrition 0.000 description 10
- 239000004317 sodium nitrate Substances 0.000 description 10
- 235000010288 sodium nitrite Nutrition 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 238000001914 filtration Methods 0.000 description 6
- IOVCWXUNBOPUCH-UHFFFAOYSA-M nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 6
- 230000000749 insecticidal Effects 0.000 description 4
- 239000002917 insecticide Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 2
- 229940000489 arsenate Drugs 0.000 description 2
- 235000012970 cakes Nutrition 0.000 description 2
- ZAASRHQPRFFWCS-UHFFFAOYSA-P diazanium;oxygen(2-);uranium Chemical compound [NH4+].[NH4+].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[U].[U] ZAASRHQPRFFWCS-UHFFFAOYSA-P 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G28/00—Compounds of arsenic
- C01G28/007—Halides
Definitions
- a well known and generally practised method of making sodium nitrite is by heating sodium nitrate (NaNO with metallic lead.
- sodium nitrate NaNO with metallic lead.
- lead compound by-product The exactconstitution of this by-product apparently varies, although it seems to consist mainly of lead oXid in one form or another; at least it has been found that by heating such product for a considerable length of time, under proper conditions, red lead is' formed, while it is claimed that by shorter heat treatment, under different conditions, a fine quality of litharge results.
- the product itself is not marketable, and the present invention accordingly has as one of its objects the utilization, in a practical and profitable way, of what is otherwise a more or less waste product, from the manufacturing standpoint.
- the present invention is based on the discovery that this lead compound by-product, whatever its constitution, readily reacts with arsenic acid in solution to produce a high grade lead arsenate; that is, a lead arsenate having a good color and of a diffuse or flocculent character, adapting itfor use as an insecticide, either in powder or paste form.
- the resulting mass is lixivi- 'ated so as to dissolve and wash out the nitrite, leaving lead compound by-product behind.
- the latter is then filtered ofi, in a suitable filter press, being subjected to one or more intermediate washings if desired, in order to thoroughly extract the nitrite, with the result that a grayish or dirty yellow cake is obtained.
- This cake which is readily friable, is then broken up and mixed with water, in which the particles remain more or less in suspension.
- an amount of arsenic acid proportionate to the amount of lead determined to be present, or, if desired, the original solution, to which the by-produ'ct is thus added, may contain the proper quota of arsenic acid.
- the resulting arsenate precipitates out, and may be separated by filtration in any approved way. As previously indicated, it is in very satisfactory form for use as an insecticide, possesses a good color, and is adapted for use either after dryin as a powder, or directly as it comes from t e reaction as a paste.
- My improved process thus not only produces a highly satisfactory commer-' cial product having a ready market, but utilizes a by-product which has heretofore always been regarded as a hampering factor in the commercial ractice of the process for making sodium nltrite by heating sodium
- Other modes of applying the principle of my invention may be employed instead of the one explained, .change being made as regards the method herein disclosed, provided the step or steps stated by any of the following claims or the equivalent 'of such stated step or steps be employed.
- the method of making lead arsenate which consists in filtering off the lead compound by-product of the making of sodium nitrite by heating sodium nitrate and metallic lead, and mixing such compound with a solution of arsenic acid.
- the method of making lead arsenate which consists in filtering oi the lead compound by-product of the making of sodium nitrite by heating sodium nitrate and metallic lead, and mixing such compound with 20 a solution of arsenic acid, the amount of arsenic acid being proportioned to the amount of lead in such compound. 4
Description
1 NITED STATES PATE MATTHEW w. BUTLER, or CLEVELAND, oHro, ASSIGNOR'TO THE HARSI-IAW, FULLER & eoonwnv COMPANY, or cLEvELANnoHro, A CORPORATION or 01110.
METHOD OF MAKING LEAD ARSENATE.
No Drawing.
To all whom it may colic-em.-
Be it known that I, MATTHEW W. BUTLER, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State 5 of Ohio, have invented a new and useful Improvement in Methods of Making Lead Arsenate, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.
A well known and generally practised method of making sodium nitrite (NaNO is by heating sodium nitrate (NaNO with metallic lead. In addition to the desired nitrite, there results from this process a lead compound by-product. The exactconstitution of this by-product apparently varies, although it seems to consist mainly of lead oXid in one form or another; at least it has been found that by heating such product for a considerable length of time, under proper conditions, red lead is' formed, while it is claimed that by shorter heat treatment, under different conditions, a fine quality of litharge results.
The product itself, however, as it comes from the main process, is not marketable, and the present invention accordingly has as one of its objects the utilization, in a practical and profitable way, of what is otherwise a more or less waste product, from the manufacturing standpoint. The present invention is based on the discovery that this lead compound by-product, whatever its constitution, readily reacts with arsenic acid in solution to produce a high grade lead arsenate; that is, a lead arsenate having a good color and of a diffuse or flocculent character, adapting itfor use as an insecticide, either in powder or paste form. I
The steps involved in carrying out my improved process will now be fully described and particularly pointed out in the claims, the following description, however, setting forth in detail but one of various modes of carrying out the invention, or ways in which the principle of such invention may be used. The reaction that occurs when sodium nitrate is heated with metallic lead, may be represented by the following equation:
' in which the by-product is indicated as lead Specification of Letters Patent.
. nitrate and metallic lead together.
Patented Dec. 9, 1919.
Application filed December 8, 1917. Serial No. 206,271.
monoxid. It is not essential, however, to the present process to inquire into the exact character of this reaction, nor to make certain that the by-product in question is composed of this particular oxid. Neither is it material whether this oxid, if present, be in the yellow form known as massicot, or in the reddish form known as litharge.
In making sodium nitrite in the fashion just described, the resulting mass is lixivi- 'ated so as to dissolve and wash out the nitrite, leaving lead compound by-product behind. The latter is then filtered ofi, in a suitable filter press, being subjected to one or more intermediate washings if desired, in order to thoroughly extract the nitrite, with the result that a grayish or dirty yellow cake is obtained. This cake, which is readily friable, is then broken up and mixed with water, in which the particles remain more or less in suspension.
To the mixture thus obtained is then added an amount of arsenic acid proportionate to the amount of lead determined to be present, or, if desired, the original solution, to which the by-produ'ct is thus added, may contain the proper quota of arsenic acid.
Such arsenic acid, whatever the manner of its addition to the mixture, is found to react promptly with the lead compound. This reaction, assuming the compound to be the monoxid, will be in accordance with the i following equation:
The resulting arsenate precipitates out, and may be separated by filtration in any approved way. As previously indicated, it is in very satisfactory form for use as an insecticide, possesses a good color, and is adapted for use either after dryin as a powder, or directly as it comes from t e reaction as a paste. My improved process, thus not only produces a highly satisfactory commer-' cial product having a ready market, but utilizes a by-product which has heretofore always been regarded as a hampering factor in the commercial ractice of the process for making sodium nltrite by heating sodium Other modes of applying the principle of my invention may be employed instead of the one explained, .change being made as regards the method herein disclosed, provided the step or steps stated by any of the following claims or the equivalent 'of such stated step or steps be employed.
I therefore particularly point out and distinctly claim as my invent1on:-
1. The method of making lead arsenate,
which consists in reacting with arsenic acid upon the lead compound by-product of the making of sodium nitrite by heating sodium nitrate and metallic lead.
2. The method of making lead arsenate, which consists in filtering off the lead compound by-product of the making of sodium nitrite by heating sodium nitrate and metallic lead, and mixing such compound with a solution of arsenic acid.
3. The method of making lead arsenate, which consists in filtering oi the lead compound by-product of the making of sodium nitrite by heating sodium nitrate and metallic lead, and mixing such compound with 20 a solution of arsenic acid, the amount of arsenic acid being proportioned to the amount of lead in such compound. 4
Signed by me, this 5th day of December,
MATTHEW W. BUTLER.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1324300A true US1324300A (en) | 1919-12-09 |
Family
ID=3391751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US1324300D Expired - Lifetime US1324300A (en) | butler |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1324300A (en) |
-
0
- US US1324300D patent/US1324300A/en not_active Expired - Lifetime
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