公开(公告)号：US10669056B2

公开(公告)日：2020-06-02

申请号：US15512326

申请日：2015-09-15

Applicant: RHODIA OPERATIONS

Inventor： Lars Fischer ,  Jacques Cavezzan ,  Jean-François Thome

IPC: B65B69/00 ,  C07C39/08

Abstract: A process for unloading a container containing an oxidizable compound having a melting point Tm greater than 15° C. is described. This process comprises the steps consisting in heating the container using a heating means until the oxidizable compound is liquid, the temperature of the heating means remaining less than or equal to Tm+105° C., and then unloading the oxidizable compound in the liquid state. A process for handling such an oxidizable compound, comprising this unloading step, and also a device enabling this process to be carried out, are also proposed.

公开(公告)号：US10421905B2

公开(公告)日：2019-09-24

申请号：US15550478

申请日：2016-02-22

Applicant: RHODIA OPERATIONS

Inventor： Jacques Cavezzan ,  Sébastien Lomel ,  Christian Rouyer ,  Terry Chamberlain

IPC: C07C7/20 ,  C09K15/08 ,  C08F2/42 ,  C08F2/01 ,  C09K15/26

Abstract: The invention relates to a process for preparing concentrated solutions of polymerization inhibitor, that can be used for the production, purification and storage of monomer compositions. This process comprises a step in which at least one polymerization inhibitor in the molten state is mixed with a solvent.

公开(公告)号：US09605203B2

公开(公告)日：2017-03-28

申请号：US15021994

申请日：2014-09-11

Applicant: RHODIA OPERATIONS

Inventor： Christelle Chretien ,  Lars Fischer ,  Stephan Verdier ,  Jacques Cavezzan

IPC: C07C39/08 ,  C08F36/00 ,  C09K15/08 ,  C08F236/08 ,  C08F136/08 ,  C07C37/68 ,  C08F2/38 ,  C07C37/14 ,  C07C37/82 ,  C07C37/74

CPC classification number: C09K15/08 ,  C07C37/14 ,  C07C37/68 ,  C07C37/74 ,  C07C37/82 ,  C07C39/08 ,  C08F2/38 ,  C08F136/08 ,  C08F236/08 ,  C08F2/40

Abstract: The invention describes a composition that inhibits the polymerization of ethylenically unsaturated monomers, including at least 98% by weight of 4-tert-butylcatechol (4-TBC), 0.03% to 0.2% by weight of catechol (PC), and at least one impurity selected among 3-tert-butylcatechol, tert-butylhydroquinone, 3,5-di-tert-butylcatechol and mixture thereof, the total quantity of said impurities and of the PC being 0.1% to 0.8% by weight of said composition. The invention also describes a method for removing said polymerization-inhibiting composition present in a mixture including at least one ethylenically unsaturated monomer.