Chromatography of polymers

Patent metadata

Field	Value
Publication number	US-10274465-B2
Application number	US-201214119403-A
Country	US
Kind code	B2
Filing date	Jun 1, 2012
Priority date	Jun 3, 2011
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

The invention provides an apparatus for polymer chromatography, comprising at least one column that comprises a first stationary phase comprising one of the following: A) a material comprising at least one non-carbon atom, excluding glass or a metal, selected from molybdenum sulfide MoS2, tungsten sulfide WS2, silicon carbide SiC, boron nitride BN, or combinations thereof, or B) glass, or a metal, or combinations thereof, and a material comprising at least one non-carbon atom selected from molybdenum sulfide MoS2, tungsten sulfide WS2, silicon carbide SiC, boron nitride BN, or combinations thereof. The invention also provides a method for polymer chromatography, comprising introducing a solution, comprising a polymer, into a liquid flowing through a first stationary phase, and wherein the first stationary phase comprises one of foregoing materials (A) or (B).

First claim

The invention claimed is:

1. A method for HT-TGIC polymer chromatography to separate an olefin-based polymer with a density from 0.83 g/cc to 0.97 g/cc, based on comonomer content, said method comprising introducing a solution, comprising a polymer, into a liquid flowing through a first stationary phase,
wherein the first stationary phase comprises molybdenum sulfide (MoS 2 ) with a particle size from 10 to 30 μm; and
wherein the polymer is an olefin-based polymer that has a density from 0.83 g/cc to 0.97 g/cc; and
wherein the method comprises (1) dissolving the polymer to form a sample solution, (2) loading the sample solution onto a column, (3) cooling the column, such that polymer fractions of the polymer are anchored onto the first stationary phase of column, and (4) eluting the polymer fractions, and measuring the concentration of the polymer fractions; and
wherein the stationary phase is subject to the following temperature profile: from 140° C. to 30° C., and then to 150° C.

2. The method of claim 1 , wherein the first stationary phase comprises an atomically flat crystalline composition comprising at least two different atoms.

3. The method of claim 1 , wherein the first stationary phase further comprises an inert filler.

4. The method of claim 3 , wherein the compound is chemically bonded to the inert filler.

5. The method of claim 3 , wherein the compound is coated onto the inert filler.

Assignees

• Cong Rongjuan
• Cheatham Charles M
• Parrott Al
• Yau Wallace W
• Hazlitt Lonnie G
• Zhou Zhe
• Degroot Alexander W
• Miller Matthew D
• Dow Global Technologies Llc

Inventors

• Cong Rongjuan
• Cheatham Charles M
• Parrott Al
• Yau Wallace W
• Hazlitt Lonnie G
• Zhou Zhe
• Degroot Alexander W
• Miller Matthew D

Classifications

• B01J2220/42

  Materials comprising a mixture of inorganic materials (materials coated or impregnated on a carrier B01J20/32) · CPC title

• B01J20/0259

  Compounds of N, P, As, Sb, Bi · CPC title

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title

• B01J20/3236

  containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts · CPC title

• B01J20/0285

  Sulfides of compounds other than those provided for in B01J20/045 · CPC title