US4667049A
Expired / Lapsed
US
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Method of making dialkylamino-thioxomethyl-thioalkanesulfonic acid compounds
Assignee: MC GEAN-ROHCO Inc
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Filing: 1986-02-27
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Granted: 1987-05-19
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Expires: 2006-02-27
Abstract
Abstract A method for the preparation of an alkali metal dialkylaminothioxomethyl-thioalkanesulfonate composition comprising reacting a monoamine with carbon disulfide to form a dithiocarbamic acid monoamine salt, reacting the salt with an alkyl sultone to form an amino thioxo methyl thioalkane sulfonate monoamine salt, and sulfonate salt with an alkali metal base to form an alkali metal salt of the amino thioxo methyl thioalkane sulfonate composition.
Inventors
- 👤 Kurt E. Heikkila
- 👤 Rodney K. Williams
- 👤 Bruce A. Bohnen
- 👤 Russell J. Pylkki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:05
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A method for the preparation of an improved, more pure dialkylamino-thioxomethyl-thioalkanesulfonate composition which comprises the steps of: (a) reacting a dialkyl monoamine compound with carbon disulfide in sufficient amount to form a dialkyl dithiocarbamate dialkylamine salt; (b) reacting the dialkyl dithiocarbamate dialkylamine salt with an alkyl sultone to form a dialkylamine salt of a dialkylamino-thioxomethyl-thioalkanesulfonate; and (c) reacting the dialkylamine salt of the dialkylamino-thioxomethyl-thioalkanesulfonate with an alkali metal base at a sufficient temperature (1) to form an alkali metal salt of the dialkylamino-thioxomethyl-thioalkane sulfonic acid substantially free of nonvolatile reaction by-products and impurities; and (2) to volatilize the liberated monoamine.
Claim 2
Independent Claim
100 words
A method for the preparation of an improved, more pure dialkylamino-thioxomethyl-thioalkanesulfonate composition which comprises the steps of: (a) reacting a dialkyl monoamine compound with carbon disulfide in sufficient amount to form a dialkyl dithiocarbamate dialkylamine salt; (b) reacting the dialkyl dithiocarbamate dialkylamine salt with an alkyl sultone to form a dialkylamine salt of a dialkylamino-thioxomethyl-thioalkanesulfonate; and (c) reacting the dialkylamine salt of the dialkylamino-thioxomethyl-thioalkanesulfonate with an alkali metal base at a sufficient temperature (1) to form an alkali metal salt of the dialkylamino-thioxomethyl-thioalkane sulfonic acid substantially free of nonvolatile reaction by-products and impurities; and (2) to volatilize the liberated monoamine.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein each alkyl group of the dialkyl amine is independently selected from methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, amyl or hexyl.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the alkyl sultone comprises 1,3-propane sultone.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein the alkali metal base comprises an alkali metal hydroxide.
Claim 6
Dependent Claim
13 words
The method of claim 4 wherein the alkali metal hydroxide comprises sodium hydroxide.
References Cited (Backward Citations)
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US3122549A
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US3359297A
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US4134803A
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US4272335A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |