公开(公告)号：US5617741A

公开(公告)日：1997-04-08

申请号：US597414

申请日：1996-02-08

申请人： Brian A. McNeil ,  Michael H. Evans

发明人： Brian A. McNeil ,  Michael H. Evans

IPC分类号： F25J3/02 ,  F25J3/08

CPC分类号： F25J3/029 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J2200/02 ,  F25J2200/04 ,  F25J2200/30 ,  F25J2200/50 ,  F25J2200/70 ,  F25J2200/72 ,  F25J2200/74 ,  F25J2200/78 ,  F25J2210/06 ,  F25J2235/02 ,  F25J2235/60 ,  F25J2240/12 ,  F25J2240/30 ,  F25J2270/02 ,  F25J2270/04 ,  F25J2290/34 ,  F25J2290/40 ,  Y10S62/927

摘要： Nitrogen is removed from a natural gas feed stream by a cryogenic distillation process in which said feed stream is fed to a primary column of a distillation column system having a primary column and a secondary column fed from and operating at substantially the same pressure as the primary column. At least a portion of a primary column methane-rich bottoms liquid is expanded and at least partially vaporized in heat exchange with a condensing primary column nitrogen-enriched vapor. The at least partially condensed primary column nitrogen-enriched vapor is returned to the primary column to provide higher temperature reflux to the distillation column system. A secondary column methane-rich bottoms liquid is at least partially vaporized in heat exchange with a condensing nitrogen-rich overhead vapor to produce a further methane-rich product. At least a portion of the at least partially condensed nitrogen-rich overhead vapor portion is returned to the primary or secondary column to provide lower temperature reflux to the distillation column system.

摘要翻译： 通过低温蒸馏方法从天然气进料流中除去氮气，其中所述进料流被送入蒸馏塔系统的主塔中，所述蒸馏塔系统具有主塔和辅柱，所述主塔和副塔与主塔 柱。 至少一部分主塔甲烷浓缩的底部液体被膨胀并且与冷凝的初级柱富氮蒸气热交换至少部分蒸发。 将至少部分冷凝的主塔富氮蒸气返回到主塔以向蒸馏塔系统提供较高温度的回流。 第二塔富甲烷塔底液体与冷凝的富氮塔顶蒸气热交换至少部分蒸发，以产生更富含甲烷的产物。 至少部分冷凝的富氮塔顶蒸气部分的至少一部分返回到主塔或次塔，以向蒸馏塔系统提供较低温度的回流。

公开(公告)号：US07620211B2

公开(公告)日：2009-11-17

申请号：US10549781

申请日：2004-04-07

申请人： Richard Walker Browne ,  Robert V. Canning, Jr. ,  Michael H. Evans ,  Robert William Johnson ,  Barry Rubin ,  Douglas Ray Stilwell

发明人： Richard Walker Browne ,  Robert V. Canning, Jr. ,  Michael H. Evans ,  Robert William Johnson ,  Barry Rubin ,  Douglas Ray Stilwell

IPC分类号： G06K9/00 ,  G01N21/00

CPC分类号： H04N1/4095 ,  G01N21/59 ,  G01N2021/8663 ,  H04N1/00005 ,  H04N1/00034 ,  H04N1/00045 ,  H04N1/00047 ,  H04N1/0005 ,  H04N1/00068

摘要： An image analysis method to quantify visual showthrough of printed images on the reverse face of planar objects, such as paper. An illumination level is set using a white reference object. A white reference image is stored in a computer memory. An image of a planar object having a printed image on the reverse face is stored in a computer memory. A pixel by pixel ratio of the two images is calculated and a mean value of the ratios is calculated to characterize the visual showthrough. The measurements are substantially independent of both the illumination level and image shading.

摘要翻译： 一种图像分析方法，用于量化平面物体（如纸张）反面上的打印图像的视觉显示。 使用白色参考对象设置照明级别。 白色参考图像存储在计算机存储器中。 具有背面印刷图像的平面物体的图像被存储在计算机存储器中。 计算两个图像的像素比例，并且计算比率的平均值以表征视觉显示。 测量值基本上与照明水平和图像阴影无关。

公开(公告)号：US5287703A

公开(公告)日：1994-02-22

申请号：US746671

申请日：1991-08-16

申请人： Dennis P. Bernhard ,  Michael H. Evans ,  Richard P. Freeman ,  Howard C. Rowles

发明人： Dennis P. Bernhard ,  Michael H. Evans ,  Richard P. Freeman ,  Howard C. Rowles

IPC分类号： C10G5/06 ,  C07C7/00 ,  C10G7/00 ,  F25J3/02

CPC分类号： C07C7/005 ,  F25J3/0219 ,  F25J3/0233 ,  F25J3/0238 ,  F25J3/0242 ,  F25J3/0252 ,  F25J2200/80 ,  F25J2210/12 ,  F25J2270/12 ,  F25J2270/66

摘要： A process for cooling, phase separating, rectifying and stripping a hydrocarbon containing feed gas stream to recover a heavy hydrocarbon product wherein a predominant amount of the refrigeration for the process is provided from a single loop vapor recompression refrigerator employing a mixed refrigerant.

摘要翻译： 一种用于冷却，相分离，精馏和汽提含烃进料气流以回收重质烃产物的方法，其中用于该方法的主要量的制冷是从采用混合制冷剂的单回路蒸汽再压缩制冷机提供的。