IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0933616
(2001-08-22)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Fay, Sharpe, Fagan, Minnich & McKee
|
인용정보 |
피인용 횟수 :
23 인용 특허 :
27 |
초록
▼
An electric arc welder powered by a plurality of liquid organic fuel cells. The fuel cells use a methanol/water mixture as the organic feed. The fuel cells produce carbon dioxide as a reactive product which is used an a shielding gas during the arc welding process. The fuel cells are stacked togethe
An electric arc welder powered by a plurality of liquid organic fuel cells. The fuel cells use a methanol/water mixture as the organic feed. The fuel cells produce carbon dioxide as a reactive product which is used an a shielding gas during the arc welding process. The fuel cells are stacked together to produce the desired arc voltage and current between an electrode and the workpiece. The arc welder includes a welding current to control the current wave shape through the electrode and to control or increase the voltage through the electrode.
대표청구항
▼
An electric arc welder powered by a plurality of liquid organic fuel cells. The fuel cells use a methanol/water mixture as the organic feed. The fuel cells produce carbon dioxide as a reactive product which is used an a shielding gas during the arc welding process. The fuel cells are stacked togethe
An electric arc welder powered by a plurality of liquid organic fuel cells. The fuel cells use a methanol/water mixture as the organic feed. The fuel cells produce carbon dioxide as a reactive product which is used an a shielding gas during the arc welding process. The fuel cells are stacked together to produce the desired arc voltage and current between an electrode and the workpiece. The arc welder includes a welding current to control the current wave shape through the electrode and to control or increase the voltage through the electrode. he majority of the other isomers, e) the fraction that is low in the desired isomer that is recovered from the separation zone that is described in d) is treated in a catalytic zone for isomerization of xylenes, in the presence of a catalyst that comprises at least one EUO zeolite composition whose crystals are grouped in aggregates that have a grain size with a value of Dv,90 less than 400 microns and at least one element of group VIII of the periodic table, to produce an effluent that comprises paraxylene, orthoxylene, metaxylene, whereby said effluent is at least in part recycled at the inlet of the separation zone of the xylenes that is described in d), and/or at least in part recycled at the inlet of the distillation zone that is described in a). 2. A process according to claim 1, such that the desired xylene isomer is paraxylene. 3. A process according to claim 1 such that the desired xylene isomer is metaxylene. 4. A process according to claim 1, such that at least a portion of the benzene that is drawn off from the distillation zone that is described in stage c) is recycled at the inlet of the transalkylation zone that is described in b). 5. A process according claim 1, such that the distillation zone that is described in a) comprises a first distillation zone to separate at least in part the C8-aromatic compounds from the aromatic compounds that have at least 9 carbon atoms and a second distillation zone that makes it possible to separate at least in part the C9-aromatic compounds and the compounds that have at least 10 carbon atoms. 6. A process according to claim 1, such that the catalyst that is used in the isomerization zone that is described in e) has a base of at least one EUO zeolite composition that is EU-1, TPZ-3, or ZSM-50 zeolites, comprising silicon and at least one element T that is aluminum, iron, gallium or boron, with an overall Si/T ratio that is greater than 5. 7. A process according to claim 1, such that the catalyst of the isomerization zone that is described in e) has a base of at least one EUO zeolite composition whose crystal size is less than 5 microns. 8. A process according to claim 1, such that the catalyst that is used in the isomerization zone that is described in e) also comprises at least one element that is a metal of groups IIIA or IVA. 9. A process according to claim 1, such that the catalyst that is used in the isomerization zone that is described in e) has a dispersion of the metal of group VIII of between 50% and 100%. 10. A process according to claim 1, such that the catalyst that is used in the isomerization zone that is described in e) has a macroscopic distribution coefficient of the metal of group VIII of between 0.7 and 1.3. 11. A process according to claim 1, such that the isomerization zone that is described in b) is operated at a temperature of between 300 and 500° C., at a partial hydrogen pressure of between 0.3 and 1.5 MPa, at a total pressure of between 0.45 and 1.9 MPa and with a PPH of between 0.25 h-1and 30 h-1. 12. A process according to claim 1, such that at least one fraction of the output isomerization effluent is recycled in the isomerization zone that is described in e), whereby said fraction comprises at least one compound with a boiling point of between 80 and 135° C. 13. A process according to claim 1, such that the catalyst that is used in the transalkylation zone that is described in b) has a mordenite base and comprises at least one metal of group VIB, VII and VIII of the periodic table. 14. A process according to claim 1, such that the catalyst is used in the transalkylation stage that is described in b) also comprises at least one element from groups IVA or III of the periodic table. 15. A process according to claim 1, such that the transalkylation stage that is described in b) is operated at a temperature of between 250° C. and 600° C. under a pressure of between 1 and 6 MPa, with a PPH of between 0.1 h-1 and 10 h-1, with a hydrogen to hydrocarbon molar ratio of between 2 and 20. 16. A process according to claim 1, such that the zone for separation of the xylenes that is described in d) is a simulated moving bed adsorption zone in the presence of a zeolitic sieve. 17. A process according to claim 16, such that the zeolitic sieve that is used in stage d) to extract specifically the paraxylene comprises at least one X, or Y zeolite whose exchangeable sites are occupied by at least one alkaline or alkaline-earth cation. 18. A process according to claim 16, such that the zeolitic sieve that is used in stage d) to extract specifically the metaxylene and the orthoxylene comprises a Y zeolite that is exchanged with at least one of Li, Na, Be, Mg, Ca, Sr, Mn, Cd, Cu or Ni. 19. A process according to claim 1, such that the adsorption stage of stage d) takes place in the presence of an elution solvent that is toluene, paradiethylbenzene, methyl-tert-butyl ether MTBE, or diisopropyl ether (DIPE). 20. A process according to claim 1, such that the separation zone of stage d) comprises a crystallization zone downstream from the adsorption. 21. A process according to claim 1, wherein the catalyst that comprises at least one EUO zeolite composition whose crystals are grouped in aggregates have a grain size with a value of Dv,90 less than 200 microns. 22. A process according to claim 1, wherein the catalyst that comprises at least one EUO zeolite composition whose crystals are grouped in aggregates have a grain size with a value of Dv,90 less than 50 microns.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.