Method for self-regulation of a system

Patent metadata

Field	Value
Publication number	US-2017128927-A1
Application number	US-201515321993-A
Country	US
Kind code	A1
Filing date	Jun 23, 2015
Priority date	Jun 24, 2014
Publication date	May 11, 2017
Grant date	—

Abstract

The invention relates to a method for self-regulation of a system comprising the steps of:
(I) utilizing a magnetic field to transport magnetizable and/or magnetic particles out of a control volume or to localize said particles in the control volume, (II) changing magnetic properties of the magnetizable and/or magnetic particles, which are ferromagnetic or paramagnetic, in the control volume by changing a temperature Tp of the magnetizable and/or magnetic particles or by changing the composition of the magnetizable and/or magnetic particles.

First claim

1 - 18 . (canceled)

19 . A method for self-regulation of a system, the method comprising:
(I) utilizing a magnetic field to transport magnetizable and/or magnetic particles out of a control volume or to localize said particles in the control volume, wherein the magnetizable and/or magnetic particles:
a. are localized in the control volume by the magnetic field, when said particles have ferromagnetic properties, and transported out of the control volume by a flowing fluid or gravity, when said particles have paramagnetic properties, or
b. are transported out of the control volume by the magnetic field, when said particles have ferromagnetic properties, and are localized in the control volume, when said particles have paramagnetic properties, and
(II) changing magnetic properties of the magnetizable and/or magnetic particles, which are ferromagnetic or paramagnetic, in the control volume by changing a temperature Tp of the magnetizable and/or magnetic particles or by changing the composition of the magnetizable and/or magnetic particles, wherein at least one chemical reaction is carried out in the control volume.

20 . The method according to claim 19 , wherein the magnetic field is a moving magnetic field.

21 . The method according to claim 19 , wherein the temperature Tp increases and the magnetizable and/or magnetic particles are transported out of the control volume when their temperature Tp is higher than their Curie temperature Tc.

22 . The method according to claim 19 , wherein the at least one chemical reaction is an exothermic reaction.

23 . The method according to claim 22 , wherein the temperature Tp increases and at least part of the energy for elevating the temperature Tp is liberated by the exothermic reaction.

24 . The method according to claim 19 , wherein the temperature Tp decreases and the magnetizable and/or magnetic particles are transported out of the control volume when their temperature Tp is lower than their Curie temperature Tc.

25 . The method according to claim 19 , wherein the at least one chemical reaction is an endothermic reaction.

26 . The method according to claim 25 , wherein the temperature Tp decreases and at least part of the energy emitted by the magnetizable and/or magnetic particles is utilized for carrying out the endothermic reaction.

27 . The method according to claim 19 , wherein the magnetizable and/or magnetic particles catalyze the at least one chemical reaction or comprise a catalytically active material.

28 . The method according to claim 19 , wherein the magnetizable and/or magnetic particles are a reactant or a product of the at least one chemical reaction or comprise a reactant or a product of the at least one chemical reaction.

29 . The method according to claim 19 , wherein once transported out of the control volume the magnetizable and/or magnetic particles are cooled or heated and/or regenerated and recycled into the control volume.

30 . The method according to claim 19 , wherein the composition of the magnetizable and/or magnetic particles changes by the at least one chemical reaction changing an oxidation state of at least one component of the magnetizable and/or magnetic particles.

31 . The method according to claim 19 , wherein the control volume is part of a fixed bed reactor, an expanded bed reactor, a fluidized bed reactor or a suspension reactor.

32 . The method according to claim 19 , wherein the at least one chemical reaction is a hydrogenation.

33 . The method according to claim 19 , wherein a difference between the Curie temperature Tc of the magnetizable and/or magnetic particles and a reaction temperature Tr of the at least one chemical reaction is not more than 150 K.

34 . The method according to claim 22 , wherein the exothermic reaction is carried out at a control reaction temperature Tcr which is lower than a threshold temperature Tt, the Curie temperature Tc of the magnetizable and/or magnetic particles has been adjusted such that the Curie temperature Tc of the magnetizable and/or magnetic particles is higher than the reaction temperature Tr and lower than the threshold temperature Tt and a difference between the Curie temperature Tc of the magnetizable and/or magnetic particles and the threshold temperature Tt is not more than 20° C. and the magnetic properties of the magnetizable and/or magnetic particles only change when the reaction temperature Tr, which is initially equal to the control reaction temperature Tcr, increases causing the temperature Tp of the magnetizble and/or magnetic particles to increase and the temperature Tp of the magnetizable and/or magnetic particles to exceed the Curie temperature Tc.

35 . The method according to claim 23 , wherein the exothermic reaction is carried out at a control reaction temperature Tcr which is lower than a threshold temperature Tt, the Curie temperature Tc of the magnetizable and/or magnetic particles has been adjusted such that the Curie temperature Tc of the magnetizable and/or magnetic particles is higher than the reaction temperature Tr and lower than the threshold temperature Tt and a difference between the Curie temperature Tc of the magnetizable and/or magnetic particles and the threshold temperature Tt is not more than 20° C. and the magnetic properties of the magnetizable and/or magnetic particles only change when the reaction temperature Tr, which is initially equal to the control reaction temperature Tcr, increases causing the temperature Tp of the magnetizble and/or magnetic particles to increase and the temperature Tp of the magnetizable and/or magnetic particles to exceed the Curie temperature Tc.

36 . The method according to claim 30 , wherein the exothermic reaction is carried out at a control reaction temperature Tcr which is lower than a threshold temperature Tt, the Curie temperature Tc of the magnetizable and/or magnetic particles has been adjusted such that the Curie temperature Tc of the magnetizable and/or magnetic particles is higher than the reaction temperature Tr and lower than the threshold temperature Tt and a difference between the Curie temperature Te of the magnetizable and/or magnetic particles and the threshold temperature Tt is not more than 20° C. and the magnetic properties of the magnetizable and/or magnetic particles only change when the reaction temperature Tr, which is initially equal to the control reaction temperature Tcr, increases causing the temperature Tp of the magnetizble and/or magnetic particles to increase and the temperature Tp of the magnetizable and/or magnetic particles to exceed the Curie temperature Tc.

Assignees

• Basf Se

Inventors

• Garella Dominik
• Silva Viviana
• Lang Tobias
• Garcia Palacios Javier

Classifications

• B01J8/1836

  Heating and cooling the reactor (B01J8/42 takes precedence) · CPC title

• C07C209/36

  by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings {in presence of hydrogen-containing gases and a catalyst} · CPC title

• B01J8/082 Primary

  Controlling processes · CPC title

• B01J8/42

  with fluidised bed subjected to electric current or to radiations {this sub-group includes the fluidised bed subjected to electric or magnetic fields} · CPC title

• B01J8/087

  Heating or cooling the reactor · CPC title