Urea synthesis process and plant
US-9512069-B2 · Dec 6, 2016 · US
High-yield process for the synthesis of urea
US8927770B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8927770-B2 |
| Application number | US-201214116258-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 3, 2012 |
| Priority date | May 10, 2011 |
| Publication date | Jan 6, 2015 |
| Grant date | Jan 6, 2015 |
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.
A process for the direct synthesis of urea from ammonia and carbon dioxide at high pressures and temperatures, with the formation of ammonium carbamate as intermediate, comprising a decomposition step of the ammonium carbamate and stripping of the gases formed, operating substantially at the same pressure as the synthesis step, wherein the recycled liquid streams are fed, at least partially, to the same decomposition and stripping step after being preheated by heat exchange with a stream included in the high-pressure synthesis cycle.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for the synthesis of urea from ammonia and carbon dioxide with the formation of ammonium carbamate as intermediate, comprising the following steps: (a) reacting ammonia and carbon dioxide as such or in the form of ammonium carbamate, with a NH 3 /CO 2 molar ratio ranging from 2.3 to 6, at temperatures ranging from 140 to 215° C. and pressures ranging from 12 to 25 MPa, with the formation of a first liquid mixture containing urea, ammonium ca…
Assignees
Inventors
Classifications
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
- C07C273/04Primary
Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8927770B2 cover?
- A process for the direct synthesis of urea from ammonia and carbon dioxide at high pressures and temperatures, with the formation of ammonium carbamate as intermediate, comprising a decomposition step of the ammonium carbamate and stripping of the gases formed, operating substantially at the same pressure as the synthesis step, wherein the recycled liquid streams are fed, at least partially, to…
- Who is the assignee on this patent?
- Carlessi Lino, Gianazza Alessandro, Saipem Spa
- What technology area does this patent fall under?
- Primary CPC classification C07C273/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 06 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).