Process for manufacturing acrylic acid
US-2018370895-A1 · Dec 27, 2018 · US
Methods of making acrylic acid from lactic acid or its derivatives in liquid phase
US11034641B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11034641-B2 |
| Application number | US-202016897331-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 10, 2020 |
| Priority date | Jul 29, 2016 |
| Publication date | Jun 15, 2021 |
| Grant date | Jun 15, 2021 |
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Abstract
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Methods for making acrylic acid, acrylic acid derivatives, or mixtures thereof by contacting a feed stream containing lactic acid, lactic acid derivatives, or mixtures thereof with a molten salt catalyst comprising an ionic liquid (IL) and an acid in liquid phase are provided.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of making acrylic acid comprising contacting a feed stream comprising lactide with a molten salt catalyst in a reactor at about 190° C.; wherein said molten salt catalyst comprises [PBu 4 ]Br and 2-BrPA; wherein the molar ratio of lactic acid equivalent to [PBu 4 ]Br to 2-BrPA is about 1:2:0.1; whereby acrylic acid is produced as a result of said contacting in said reactor and is removed in-situ via a reactive distillation at about 10 mbar; and wherein said acrylic acid is produced at a yield of at least about 50%.
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by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups {(C07C51/36 - C07C51/373 take precedence)} · CPC title
Phosphorus · CPC title
the ionic liquids being characterised by the counter-anions · CPC title
containing oxygen {, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr} · CPC title
containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 · CPC title
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Frequently asked questions
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- What does patent US11034641B2 cover?
- Methods for making acrylic acid, acrylic acid derivatives, or mixtures thereof by contacting a feed stream containing lactic acid, lactic acid derivatives, or mixtures thereof with a molten salt catalyst comprising an ionic liquid (IL) and an acid in liquid phase are provided.
- Who is the assignee on this patent?
- Procter & Gamble
- What technology area does this patent fall under?
- Primary CPC classification B01J27/122. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 15 2021 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 9 related publications on this page (citations in our corpus or others sharing the same primary CPC).