公开(公告)号：US20070289900A1

公开(公告)日：2007-12-20

申请号：US11424010

申请日：2006-06-14

Applicant: Walter E. Alvarez ,  Glenn W. Dodwell ,  Tushar V. Choudhary

Inventor： Walter E. Alvarez ,  Glenn W. Dodwell ,  Tushar V. Choudhary

IPC: C10G45/00 ,  C10G17/00

CPC classification number: B01J23/80 ,  C10G45/48 ,  C10G45/52

Abstract: A process for reducing the polynuclear aromatics (PNA) content of a sulfur-containing hydrocarbon stream. The process includes contacting the sulfur-containing hydrocarbon stream with a dearomatization composition comprising a promoter metal component and zinc oxide. The dearomatization composition has enhanced resistance to sulfur poisoning and is also effective to remove sulfur from the hydrocarbon stream.

Abstract translation: 一种降低含硫烃流的多核芳烃（PNA）含量的方法。 该方法包括使含硫烃流与包含促进剂金属组分和氧化锌的脱芳构化组合物接触。 脱芳构化组合物具有增强的硫中毒性，并且也有效地从烃流中除去硫。

公开(公告)号：US5936135A

公开(公告)日：1999-08-10

申请号：US917347

申请日：1997-08-26

Applicant: Vasant R. Choudhary ,  Anil K. Kinage ,  Tushar V. Choudhary

Inventor： Vasant R. Choudhary ,  Anil K. Kinage ,  Tushar V. Choudhary

IPC: C07C2/00 ,  C07C2/52 ,  C07C15/00

CPC classification number: C07C2/00 ,  C07C2529/40 ,  C07C2529/87

Abstract: The present invention describes a process for the conversion of a lower alkane or a mixture of lower alkanes or a feed containing lower alkane(s) to aromatics or higher hydrocarbons, which comprises (i) treating a bifunctional pentasil zeolite catalyst, optionally containing one or more transition elements, having strong dehydrogenation and acid sites with a mixture of H.sub.2, steam and optionally the presence of an inert gas at a gas hourly space velocity of at least about 500 cm.sup.3 g.sup.-1 h.sup.-1 at a temperature in the range of 400.degree.-800.degree. C. and pressure in the range of 1-5 atm. for a period of at least 0.5 h; (ii) treating the catalyst obtained in step (i) with air or O.sub.2 at a gas hourly space velocity of at least about 200 cm.sup.3 g.sup.-1 h.sup.-1) at a temperature in the range of 400-800.degree. C. and pressure in the range of 1-5 atm for a period of at least 0.2 h, and (iii) contacting the catalyst obtained in step (ii) with a lower alkane or mixture of lower alkanes and at least one olefin or at least one higher paraffin or both, at a gas hourly space velocity in the range of 1000-100000 cm.sup.3 g.sup.-1 h.sup.-1 at a temperature in the range of 300.degree.-600.degree. C. and pressure in the range of 1-5 atm, (iv) separating the aromatics formed from the reaction mixture by known methods and if desired, (v) recycling the unconverted lower alkanes and non-aromatics to step (iii) for further conversion.

Abstract translation: 本发明描述了将低级烷烃或低级烷烃或含低级烷烃的进料的混合物转化为芳烃或高级烃的方法，其包括（i）处理双官能五硅烷沸石催化剂，任选地含有一种或多种 更多的过渡元素，具有H2和蒸汽的混合物的强脱氢和酸性位点，并且任选存在的惰性气体的气体时间空间速度为至少约500cm 3 g-1 h -1，其温度范围为 400°-800℃，压力范围为1-5atm。 至少0.5小时; （ii）在400-800℃的温度范围内以空气或O 2以至少约200cm 3 g-1 h-1的气时空速处理所述步骤（i）中获得的催化剂和压力 在1-5atm的范围内至少0.2h的时间，和（iii）使步骤（ii）中获得的催化剂与低级烷烃或低级烷烃和至少一种烯烃或至少一种较高级链烷烃 或二者在300〜600℃的温度范围内的气时空速为1000-100000cm 3 g-1h-1，压力为1-5atm，（iv ）通过已知方法分离由反应混合物形成的芳族化合物，如果需要，（v）将未转化的低级烷烃和非芳族化合物再循环到步骤（iii）以进一步转化。