Unlock instant, AI-driven research and patent intelligence for your innovation.

aggregation method

A technology for polymer, gas phase polymerization, used in the field of polymerization to solve problems that are expensive, less efficient, and impractical

Active Publication Date: 2021-08-06
EXXONMOBIL CHEM PAT INC
View PDF135 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Additional limitations arise around grade flexibility in commercial applications where the maximum production rate of lower density polymers is so different from that of higher density polymers that downstream extruder turndown limitations require expensive or impractical workspaces, such as constructing multiple smaller (less efficient) extruders instead of one large extruder or operating extruders intermittently

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • aggregation method
  • aggregation method
  • aggregation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0096] It should be understood that while the invention has been described in connection with specific embodiments of the invention, the foregoing description is intended to be illustrative and not limiting of the scope of the invention. Other aspects, advantages and modifications will be apparent to those skilled in the art to which the invention pertains.

[0097] Accordingly, the following examples are given to provide complete disclosure and description to those skilled in the art and are not intended to limit the scope of what the inventors regard as their invention.

[0098] Comparative Examples 1-8 (see Table 2) simulate reactor operation with a condensing agent consisting essentially of isopentane. Examples 9-24 (see Table 3) used various condensing agents. Simulations were performed using the method shown at column 62, line 48 through column 69, line 51 of US Patent No. 7,683,140. These embodiments use the same physical energy source as the above patent. These exam...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

A process is provided comprising contacting under polymerizable conditions one or more monomers, at least one catalyst system, and at least two condensing agents to prepare polyolefin polymers, wherein the vapor pressure of the condensing agents is given by the formula ±4bara of the given optimum vapor pressure: optimum vapor pressure=614–716*D+2.338*P+3.603*ln(MI), wherein said optimum vapor pressure has unit (bara), D is having unit The polyolefin polymer density in (g / cc), P is the polymerization condition pressure in units (barg), and MI is the polyolefin polymer melt index in units (g / 10min). The invention also relates to a process in which at least three condensing agents are used.

Description

[0001] priority statement [0002] This application claims priority and the benefit of USSN 62 / 400,258, filed September 27, 2016, and EP 161981129.5, filed November 10, 2016, which are incorporated by reference in their entirety. [0003] Cross References to Related Applications [0004] This application is related to U.S. Provisional Application No. 62 / 400,261, filed September 27, 2016, entitled "Methods of Polymerization" (Attorney Docket No. 2016EM257) and filed September 27, 2016, entitled "Methods of Polymerization" (Attorney US Provisional Application No. 62 / 400,250, Docket No. 2016EM259), both of which are incorporated by reference. technical field [0005] The present disclosure relates to polymerization processes for preparing polyolefin polymers. In particular, the present disclosure relates to gas phase polymerization processes employing certain condensing agents. Background technique [0006] The condensing mode of operation in a gas phase polymerization react...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/00C08F2/34C08F210/02
CPCC08F2/00C08F210/02C08F2/34C08F210/16C08F210/14C08F2500/12C08F2500/08C08F4/14C08F4/24C08F4/80C08K5/01
Inventor C·L·布兰德尔F·D·赫曼J·R·拉丁纳
Owner EXXONMOBIL CHEM PAT INC