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Process for producing ultrahigh molecular weight polymer in powder form

An ultra-high molecular weight, polymer technology, used in gas/liquid distribution and storage, piping systems, mechanical equipment, etc.

Active Publication Date: 2021-12-24
INDIAN OIL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above prior art and available literature discloses or teaches the preparation of free-flowing ultra-high molecular weight drag reducing polymers within 24 hours with >90% conversion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0110] The following examples are included herein for illustrative purposes only. Those skilled in the art will appreciate that many modifications can be made to the invention without changing the essence of the invention.

[0111] All monomers and solvents were used as received and contained less than 20 ppm moisture. All chemicals were handled under nitrogen atmosphere and used as received. Before the polymerization, the polymerization reactor was heated to 120° C. for 2 hours under nitrogen flow and cooled accordingly.

Embodiment I

[0112] Example I The production method of free-flowing ultra-high molecular weight polymer in powder form is shown:

[0113] The polymerization process was carried out in a kneader reactor with a single screw configuration with a capacity of 7 L equipped with a gear pump. The catalyst and cocatalyst were treated under nitrogen. The molar ratios of catalyst, cocatalyst and monomer are in accordance with US 10,094,399 written by the applicant. The monomer used was 1-decene. The polymerization mixture (mixture of catalyst, cocatalyst and monomer) was prepared under nitrogen atmosphere and transferred to the kneader reactor maintained at 10°C through the charge inlet port located on the reactor. Once the mixture is in the reactor, agitation is started to maintain the homogeneity of the solution. The reactor was maintained under nitrogen pressure adjusted to 0.5 bar to 1.0 bar. Stirrer speed is adjusted according to the viscosity of the mixture. The average residence time of...

Embodiment II

[0114] Example II A process for the production of free-flowing ultra-high molecular weight polymers in powder form is shown

[0115] The polymerization procedure was the same as Example 1 except that the monomers used were 80 / 20 by volume 1-dodecene / 1-hexene. The conversion after this process was about 93% and the intrinsic viscosity as polymer was 21 dL / g.

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PUM

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Abstract

The present invention relates to a process for producing ultrahigh molecular weight polymer in powder form which is highly efficient drag reducing polymer. The process consists of polymerizing using titanium halide-based catalyst, co-catalyst, optionally a solvent, and monomer to a polymerization reactor, having stirring device and inlet charging and discharge outlet. The resulting ultrahigh molecular weight drag reducing polymers is free flowing, having intrinsic viscosity >10 dL / g. The process reduces polymerization time, temperature, and achieves high conversion, i.e., >90%.

Description

Technical field: [0001] The present invention relates to a method for the production of an ultra-high molecular weight drag reducing polymer in powder form. The process comprises polymerizing monomers in a reactor in the presence of a catalyst system to obtain ultra-high molecular weight polymer as a free-flowing powder. Background technique: [0002] The production of ultra-high molecular weight drag reducing polymers remains a major challenge in the polymer industry. The reaction processes used to produce these polymers require stringent conditions, such as longer polymerization times, lower polymerization temperatures, specialized catalyst systems, and sometimes specialized equipment. For the commercial production of these polymers, the development of novel methods is highly desirable. [0003] The choice of a typical reactor for the production of such niche polymers depends on many factors. One of the main ones of these factors is monomer type and chain length. Typic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/14C08F210/14C08F4/643F17D1/17
CPCC08F110/14C08F210/14F17D1/17C08F4/6435C08F2/02C08F2500/17C08J3/124C08L2207/068C08L2023/44C08L23/26
Inventor 苏赫迪普·考尔古尔米特·辛格古普雷特·辛格·卡普尔桑卡拉·斯里·文卡塔·拉玛库玛
Owner INDIAN OIL CORPORATION