IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0251564
(2002-09-20)
|
§371/§102 date |
20021009
(20021009)
|
발명자
/ 주소 |
- Eldin, Sherif
- Arhancet, Grace B.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
9 |
초록
wherein R1, R2, and R3 are independently selected from the group consisting of H, ?OH, ?SH, ?NH2, alkyl, cycloalkyl, heterocyclo, and aryl.
대표청구항
▼
1. A method of inhibiting fouling and viscosity increase in hydrocarbon streams including ethylenically unsaturated monomers comprising the step of adding to said hydrocarbon stream during ethylene production an effective amount of one or more quinone methides of the formula: wherein R1, R2, and R3
1. A method of inhibiting fouling and viscosity increase in hydrocarbon streams including ethylenically unsaturated monomers comprising the step of adding to said hydrocarbon stream during ethylene production an effective amount of one or more quinone methides of the formula: wherein R1, R2, and R3 are independently selected from the group consisting of H, ?OH, ?SH, ?NH2, alkyl, cycloalkyl, heterocyclo, and aryl.2. The method of claim 1, wherein said quinone methide is added to said hydrocarbon stream at or upstream of a location where said fouling or said viscosity increase may occur.3. The method of claim 2, wherein said location is an oil quench tower.4. The method of claim 1, wherein said quinone methide is added in an amount from about 1 ppm to about 10,000 ppm based on the hydrocarbon.5. The method of claim 1, wherein said quinone methide is a member selected from the group consisting of 2,6-di-tert-butyl-4-((3,5-di-tert-butyl-4-hydroxy-benzylidene)-cyclohexa-2,5-dienone, 4-benzylidene-2,6-di-tert-butyl-cyclohexa-2,5-dienone and combinations thereof.6. A method of inhibiting fouling and viscosity increase of a hydrocarbon stream including ethylenically unsaturated monomers during online production of ethylene comprising the step of adding to said hydrocarbon stream at or upstream of a location where said fouling or said viscosity increase may occur an effective amount of a quinone methide of the following formula: wherein R1, R2, and R3 are independently selected from the group consisting of H, ?OH, ?SH, ?NH2, alkyl, cycloalkyl, heterocyclo, and aryl.7. The method of claim 6, wherein said location is an oil quench tower.8. The method of claim 6, wherein said location is the bottom section of an oil quench tower.9. The method of claim 6, wherein said quinone methide is a member selected from the group consisting of 2,6-di-tert-butyl-4-((3,5-di-tert-butyl-4-hydroxy-benzylidene)-cyclohexa-2,5-dienone, 4-benzylidene-2,6-di-tert-butyl-cyclohexa-2,5-dienone and combinations thereof.
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