Method for producing acrolein and/or acrylic acid from glycerol

Patent metadata

Field	Value
Publication number	US-10407371-B2
Application number	US-201615354146-A
Country	US
Kind code	B2
Filing date	Nov 17, 2016
Priority date	Apr 18, 2012
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

The invention relates to the production of acrolein and/or acrylic acid from glycerol, and more particularly to a method for continuous production of a stream comprising acrolein by dehydration of glycerol, comprising cycles of reaction and regeneration of a dehydration catalyst.

First claim

The invention claimed is:

1. An installation for continuous production of a stream comprising acrolein, said installation comprising:
a unit for converting glycerol to acrolein,
a source of gaseous reaction stream comprising at least glycerol,
a source of gaseous regeneration stream comprising at least oxygen for regeneration of solid acid catalyst,

wherein the converting unit comprises:
a reactor R comprising at least two separated zones each containing said solid acid catalyst, each of the zones being configured to be used simultaneously and alternately as reaction zone and as regeneration zone in cyclical fashion and with reaction mode and regeneration mode being offset from one zone to another, each of the zones having fluid connection by a feeding device to the source “a” of reaction stream and to the source “b” of regeneration stream, wherein the gaseous streams in each of the catalyst zones are separated,
a system adapted to each feeding device allowing sequential alternation of supply with the gaseous reaction stream or with the gaseous regeneration stream,
at least one device for withdrawing a gas mixture c 1 , c 2 , c 3 , with fluidic connection to the reactor,
the reactor zones being controlled thermostatically with a single system of heat-transfer fluid.

2. The installation as claimed in claim 1 comprising a single device for withdrawing gas mixture.

3. The installation as claimed in claim 2 , wherein each of the reactor zones has fluidic connection to a device for withdrawing gas mixture.

4. The installation as claimed in claim 1 , wherein the reactor R is a multiple-tube reactor comprising tubes ( 10 ) fixed by tube plates ( 20 ) and comprising at least one plate ( 40 ) positioned between the reactor dome and the tube plates ( 20 ).

Assignees

• Arkema France

Inventors

• Devaux Jean-Francois
• Fauconet Michel
• Tlili Nabil

Classifications

• B01J8/065

  Feeding reactive fluids · CPC title

• B01J2219/00033

  Continuous processes · CPC title

• C07C45/512 Primary

  the singly bound functional group being a free hydroxyl group · CPC title

• B01J8/067

  Heating or cooling the reactor (B01J8/062 takes precedence) · CPC title

• C07C45/52 Primary

  by dehydration and rearrangement involving two hydroxy groups in the same molecule · CPC title