公开(公告)号：US20060160965A1

公开(公告)日：2006-07-20

申请号：US11312272

申请日：2005-12-20

Applicant: Mark Goode ,  Kevin Cann ,  F. Hussein ,  Robert Santana ,  David Schutz ,  Agapios Agapiou

Inventor： Mark Goode ,  Kevin Cann ,  F. Hussein ,  Robert Santana ,  David Schutz ,  Agapios Agapiou

IPC: C08F2/38

CPC classification number: C08F10/02 ,  C08F210/16 ,  C08F2410/05 ,  Y10S526/901 ,  C08F2/34 ,  C08F2/42 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/07 ,  C08F2500/18 ,  C08F210/08

Abstract: Embodiments of our invention relate to processes for transitioning among polymerization catalyst systems including processes for transitioning among olefin polymerization reactions using Ziegler-Natta catalysts systems and chromium-based catalyst systems. Among embodiments contemplated are a method of transitioning from a first catalyst to a second catalyst in an olefin polymerization reactor, comprising: adding to the reactor a deactivating agent (DA) selected from one of carbon monoxide, carbon dioxide, or combinations thereof; adding to the reactor a cocatalyst adsorbing agent (CAA), comprising an inorganic oxide selected from one of silica, alumina or combinations thereof; wherein the first catalyst comprises at least one conventional Ziegler-Natta catalyst, and a cocatalyst, wherein the second catalyst comprises at least one chromium-based catalyst, wherein the reactor is a gas-phase, fluidized bed reactor, and wherein the CAA is substantially free of transition metals. In another embodiment a method of transitioning from a first catalyst to a second catalyst in an olefin polymerization reactor is contemplated, comprising: adding a transition aid agent (TAA) wherein the TAA is selected from one of alkoxylated amines, alkoxylated amides, or combinations thereof, wherein the first catalyst comprises at least one Ziegler-Natta catalyst comprising the catalyst, a cocatalyst and optionally a support, and the second catalyst comprises at least one chromium-based catalyst.

Abstract translation: 本发明的实施方案涉及在聚合催化剂体系中过渡的方法，包括使用齐格勒 - 纳塔催化剂体系和铬基催化剂体系在烯烃聚合反应中过渡的方法。 考虑的实施方案是在烯烃聚合反应器中从第一催化剂转变为第二催化剂的方法，包括：向反应器中加入选自一氧化碳，二氧化碳或其组合中的一种失活剂（DA）; 向所述反应器中加入选自二氧化硅，氧化铝或其组合的无机氧化物的助催化剂吸附剂（CAA）; 其中所述第一催化剂包含至少一种常规齐格勒 - 纳塔催化剂和助催化剂，其中所述第二催化剂包含至少一种铬基催化剂，其中所述反应器是气相流化床反应器，并且其中所述CAA基本上 没有过渡金属。 在另一个实施方案中考虑了在烯烃聚合反应器中从第一催化剂转变为第二催化剂的方法，包括：加入转移助剂（TAA），其中TAA选自烷氧基化胺，烷氧基化酰胺或其组合之一 ，其中所述第一催化剂包含至少一种齐格勒 - 纳塔催化剂，所述催化剂包含所述催化剂，助催化剂和任选的载体，所述第二催化剂包含至少一种铬基催化剂。

公开(公告)号：US20070089392A1

公开(公告)日：2007-04-26

申请号：US11222902

申请日：2005-09-10

Applicant: David Schutz

Inventor： David Schutz

IPC: A01D46/00

CPC classification number: A01D11/00

Abstract: Disclosed is an apparatus for retrieving soft objects with minimal stress to the back and adverse damage to the objects. The apparatus comprises a storage section, a gathering section, a rim and an elongated handle. The storage section is shaped like an open basket on its side and having a top and a bottom. The gathering section extends from the bottom of the storage section, comprises two barrier regions separated by a retaining region, and has a leading edge. The rim is attached at least to the leading edge. The handle projects upward from the top of the storage section at such an angle to permit a raking-like motion when collecting objects. Methods of using the apparatus are also disclosed. The invention offers several benefits over what has been known to the art. One advantage is that many soft objects can be gathered quickly with minimal stress to the back of the person doing the task. Another benefit is that soft objects can be gathered quickly with minimal damage to the objects. This is particularly useful when the objects are fruit such as, for example, apples, oranges or peaches.

Abstract translation: 公开了一种用于以对应物体的背部和不利损坏的最小应力来检索软物体的装置。 该装置包括存储部分，聚集部分，边缘和细长手柄。 储存部分在其侧面成形为敞开的篮子，并且具有顶部和底部。 收集部分从储存部分的底部延伸，包括由保持区域隔开的两个阻挡区域，并具有前缘。 轮辋至少连接到前缘。 手柄从储存部分的顶部以这样的角度向上突出，以便在收集物体时允许耙状运动。 还公开了使用该装置的方法。 本发明提供了比本领域已知的几个好处。 一个优点是，许多软物体可以以最小的压力快速收集到执行任务的人员的背部。 另一个好处是，可以快速收集软物体，同时对物体造成最小的损害。 当对象是水果，例如苹果，橘子或桃子时，这是特别有用的。