Production method for isocyanate compound
US-2022002234-A1 · Jan 6, 2022 · US
Method for producing carbonate derivative
US12351568B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12351568-B2 |
| Application number | US-201917292249-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 14, 2019 |
| Priority date | Nov 15, 2018 |
| Publication date | Jul 8, 2025 |
| Grant date | Jul 8, 2025 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The objective of the present invention is to provide a method for producing a polycarbonate safely and efficiently even without using a base. The method for producing a carbonate derivative according to the present invention is characterized in comprising the step of irradiating a high energy light to a composition comprising the halogenated methane and the hydroxy group-containing compound in the presence of oxygen, wherein a molar ratio of a total usage amount of the hydroxy group-containing compound to 1 mole of the halogenated methane is 0.05 or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a carbonate derivative, the method consisting of an optional step of stirring a liquid composition comprising a halogenated methane and a hydroxy group-containing compound without irradiating a high energy light, and a step of irradiating the high energy light to the liquid composition in the presence of oxygen to produce the carbonate derivative, and optionally repeating the optional step of stirring and the step of irradiating, wherein the liquid composition does not comprise a base, wherein a molar ratio of a total usage amount of the hydroxy group-containing compound to 1 mole of the halogenated methane is 0.1 or more, wherein the hydroxy group-containing compound is represented by the following formula (i) and the carbonate derivative is a linear carbonate derivative represented by the following formula (I), or the hydroxy group-containing compound is represented by the following formula (ii) and the carbonate derivative is a carbonate derivative comprising a unit represented by the following formula (II-1) or a cyclic carbonate derivative represented by the following formula (II-2): R 1 —OH (i) HO—R 2 —OH (ii) R 1 —O—C(═O)—O—R 1 (I) [—O—R 2 —O—C(═O)—] (II-1) wherein R 1 is a monovalent C 1-200 organic group optionally comprising a hetero atom, R 2 is a divalent C 1-200 organic group optionally comprising a hetero atom. 2. The method according to claim 1 , wherein the halogenated methane is chloroform. 3. The method according to claim 1 , consisting of the step of stirring the composition without irradiating the high energy light. 4. The method according to claim 1 , wherein the high energy light comprises a light having a wavelength of 180 nm or more and 280 nm or less. 5. The method according to claim 1 , wherein two or more kinds of the hydroxy group-containing compound are used.
Assignees
Inventors
Classifications
Ethylene carbonate · CPC title
Ultraviolet light · CPC title
Aliphatic polycarbonates · CPC title
Aliphatic-aromatic or araliphatic polycarbonates · CPC title
and alcohols · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12351568B2 cover?
- The objective of the present invention is to provide a method for producing a polycarbonate safely and efficiently even without using a base. The method for producing a carbonate derivative according to the present invention is characterized in comprising the step of irradiating a high energy light to a composition comprising the halogenated methane and the hydroxy group-containing compound in …
- Who is the assignee on this patent?
- Univ Kobe Nat Univ Corp, Mitsubishi Gas Chemical Co, National Univ Coporation Kobe Univ
- What technology area does this patent fall under?
- Primary CPC classification C07D317/36. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 08 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).