Processes for separating dimethyl biphenyl isomers using zeolite adsorbents
US-2018215685-A1 · Aug 2, 2018 · US
Systems and methods for drying compounds
US12239952B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12239952-B2 |
| Application number | US-202217574830-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 13, 2022 |
| Priority date | Jan 15, 2021 |
| Publication date | Mar 4, 2025 |
| Grant date | Mar 4, 2025 |
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Abstract
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This application relates to methods and systems for drying polyol starters, as well as reaction mixtures including such polyol starters, and the preparation of polymers derived from such polyol starters. In some embodiments, the present invention encompasses methods of drying a polyol initiator compound, the method including the step of contacting a composition comprising a polyol initiator compound with one or more molecular sieves.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of drying a polyol initiator compound, the method comprising the step of: flowing a composition comprising a polyol initiator compound through a vessel at a flow rate of about 0.5 to about 2.5 mL/min; and contacting the composition comprising the polyol initiator compound with one or more molecular sieves, wherein the vessel contains the molecular sieves and wherein the molecular sieves are maintained at a temperature between about 50° C. and about 100° C. while in contact with the polyol initiator compound. 2. The method of claim 1 , wherein the molecular sieves are crystalline potassium aluminosilicate molecular sieve beads. 3. The method of claim 1 , wherein the molecular sieves have a pore size of about 3 angstroms. 4. The method of claim 1 , wherein the polyol initiator compound is selected from the group consisting of di propylene glycol, polypropylene glycol, ethylene glycol, 1,2-propylene glycol, glycerol, ethoxylated glycerol, ethylene diamine, N-methyl-amino-dipropylamine, pentacrythriol, sorbitol, and sucrose. 5. The method of claim 1 , wherein the polyol initiator compound selected from the group consisting of di propylene glycol and polypropylene glycol. 6. The method of claim 1 , wherein, after contacting a composition comprising a polyol initiator compound with one or more molecular sieves, the resulting composition comprises less than 120 ppm of water as measured by Karl-Fisher titration. 7. The method of claim 1 , wherein the molecular sieves are activated.
Assignees
Inventors
Classifications
by solid-liquid treatment; by chemisorption · CPC title
Pore volume · CPC title
perovskite-type (ABO3) · CPC title
Other types characterised by their X-ray diffraction pattern and their defined composition {(C01B39/023, C01B39/026, C01B39/06 take precedence)} · CPC title
Post-polymerisation treatment, e.g. recovery, purification, drying · CPC title
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- What does patent US12239952B2 cover?
- This application relates to methods and systems for drying polyol starters, as well as reaction mixtures including such polyol starters, and the preparation of polymers derived from such polyol starters. In some embodiments, the present invention encompasses methods of drying a polyol initiator compound, the method including the step of contacting a composition comprising a polyol initiator com…
- Who is the assignee on this patent?
- Saudi Aramco Tech Co
- What technology area does this patent fall under?
- Primary CPC classification B01J20/18. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 04 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).