IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0966163
(1978-12-04)
|
발명자
/ 주소 |
- Ward Clifford (Louisa KY)
|
출원인 / 주소 |
- Ashland Oil, Inc. (Ashland KY 02)
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인용정보 |
피인용 횟수 :
4 인용 특허 :
1 |
초록
▼
Disclosed is a catalyst and method for converting mercaptans and mercaptide compounds in aqueous alkaline solution to disulfides. Catalytic agent is a metal complex synthesized from 3,3′,4,4′-benzophenonetetracarboxylic dianhydride and converted to either the alkali metal salt or to the acid form. T
Disclosed is a catalyst and method for converting mercaptans and mercaptide compounds in aqueous alkaline solution to disulfides. Catalytic agent is a metal complex synthesized from 3,3′,4,4′-benzophenonetetracarboxylic dianhydride and converted to either the alkali metal salt or to the acid form. The method for oxidizing the mercaptide compounds comprises contacting mercaptans and mercaptide compounds in aqueous alkaline solution with air in the presence of the catalyst and subsequently separating alkaline solution from the resultant disulfide compounds.
대표청구항
▼
A metal complex or substituted derivative thereof obtained from reacting at a temperature between about 190°C. and about 220°C. a mixture containing 3,3′,4,4′-benzophenone-tetracarboxylic dianhydride, a metal salt of the desired metal, urea, boric acid and ammonium molybdate wherein said metal is se
A metal complex or substituted derivative thereof obtained from reacting at a temperature between about 190°C. and about 220°C. a mixture containing 3,3′,4,4′-benzophenone-tetracarboxylic dianhydride, a metal salt of the desired metal, urea, boric acid and ammonium molybdate wherein said metal is selected from the group of iron, manganese, chromium, magnesium, copper, nickel, zinc, titanium, hafnium, thorium, tin, lead, columbium, tantalum, antimony, bismuth, molybdenum, palladium, platinum, silver, mercury, vanadium, and cobalt, the mole ratio of urea to 3,3′,4,4′-benzophenone-tetracarboxylic dianhydride being between about 20 and about 1, and correspondingly the mole ratio of metal salt being between about 1.0 and about 0.1, the mole ratio of boric acid being between about 1.0 and about 0.1 and the mole ratio of ammonium molybdate being between about 1.0 and about 0.002. A catalyst for oxidizing alkali mercaptide compounds to disulfides in an aqueous alkaline solution obtained by reacting the complex or derivatives thereof of claim 1 with an acid or base to thereby provide a catalyst which is soluble in aqueous alkaline solution. The catalyst of claim 4 being impregnated on a caustic inert carrier.
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