UST921002I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST921002I4 UST921002I4 US921002DH UST921002I4 US T921002 I4 UST921002 I4 US T921002I4 US 921002D H US921002D H US 921002DH US T921002 I4 UST921002 I4 US T921002I4
- Authority
- US
- United States
- Prior art keywords
- hydroxide
- dimethyl sulfate
- butylhydroquinone
- water
- reaction system
- 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.)
- Pending
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PROCESS FOR PREPARING BUTYLATED HYDROXYANISOLE (BHA) OF HIGH 3-ISOMER CONTENT, COMPRISING PROVIDING AN AGITATED REACTION SYSTEM OF T-BUTYLHYDROQUINONE AND DIMETHYL SULFATE IN AN ORGANIC SOLVENT AND A LIMITED AMOUNT OF WATER, AND SLOWLY ADDING THERETO AQUEOUS SODIUM HYDROXIDE OR OTHER HYDROXIDE OVER A PERIOD OF FROM ABOUT 1 TO ABOUT 3.5 HOURS WHILE MAINTAINING THE SYSTEM AT A RELATIVELY LOW TEMPERATURE OF FROM ABOUT 30 TO 50*C., THE TOTAL AMOUNT OF WATER IN THE REACTION SYSTEM BEING FROM ABOUT 2.5 TO ABOUT 5 PARTS PER 10 PARTS OF DIMETHYL SULFATE, THE AMOUNT OF DIMETHYL SULFATE BEING FROM ABOUT 1 TO ABOUT 3 MOLES PER MOLE OF HYDROXIDE, AND THE TI-BUTYLHYDROQUINONE BEING IN SLIGHT EXCESS OF FROM ABOUT 0.1 TO ABOUT 0.5 MOLE PER MOLE OF HYDROXIDE.
Description
DEFENSIVE PUBLICATlON UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The flies of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oiiice makes no assertion as to the novelty ot the disclosed subject matter.
PUBLISHED APRIL 2, 1974 T921,002 PROCESS FOR PRODUCING BUTYLATED HYDROXYANISOLE AND HIGH S-ISOMER CONTENT James Michael Coe, 2152 Swannnnoa Ave., and Charles Edward Osborne, 1540 Belmeade Drive, both of Kingsport, Tenn. 37664 Continuation of application Ser. No. 156,131, June 23,
1971. This application Dec. 22, 1972, Ser. No. 317,560 Claims priority, application Great Britain, June 23, 1972,
29,614/72 Int. Cl. C07c 43/20 U.S. Cl. 260-613 No Drawing. 7 Pages Specification Process for preparing butylated hydroxyanisole (BHA) of high 3-isomer content, comprising providing an agitated reaction system of t-butylhydroquinone and dimethyl sulfate in an organic solvent and a limited amount of water, and slowly adding thereto aqueous sodium hydroxide or other hydroxide over a period of from about 1 to about 3.5 hours while maintaining the system at a relatively low temperature of from about 30 to 50 C., the total amount of water in the reaction system being from about 2.5 to about 5 parts per 10 parts of dimethyl sulfate, the amount of dimethyl sulfate being from about 1 to about 3 moles per mole of hydroxide, and the t-butylhydroquinone being in slight excess of from about 0.1 to about 0.5 mole per mole of hydroxide.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2961472A GB1366441A (en) | 1971-06-23 | 1972-06-23 | Preparation of antioxidant |
US31756072A | 1972-12-22 | 1972-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
UST921002I4 true UST921002I4 (en) | 1974-04-02 |
Family
ID=26259995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US921002D Pending UST921002I4 (en) | 1972-06-23 | 1972-12-22 | Defensive publication |
Country Status (1)
Country | Link |
---|---|
US (1) | UST921002I4 (en) |
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1972
- 1972-12-22 US US921002D patent/UST921002I4/en active Pending
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