公开(公告)号：US20180057740A1

公开(公告)日：2018-03-01

申请号：US15550478

申请日：2016-02-22

Applicant: RHODIA OPERATIONS

Inventor： Jacques CAVEZZAN ,  Sébastien LOMEL ,  Christian ROUYER ,  Terry CHAMBERLAIN

IPC: C09K15/08 ,  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：US20170275039A1

公开(公告)日：2017-09-28

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：US20160230089A1

公开(公告)日：2016-08-11

申请号：US15021994

申请日：2014-09-11

Applicant: RHODIA OPERATIONS

Inventor： Christelle CHRETIEN ,  Lars FISCHER ,  Stephan VERDIER ,  Jacques CAVEZZAN

IPC: C09K15/08 ,  C08F136/08

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 in said polymerization-inhibiting composition present in a mixture including at least one ethylenically unsaturated monomer.

Abstract translation: 本发明描述了抑制烯属不饱和单体聚合的组合物，包括至少98重量％的4-叔丁基邻苯二酚（4-TBC），0.03重量％至0.2重量％的儿茶酚（PC）和至少一种 选自3-叔丁基邻苯二酚，叔丁基氢醌，3,5-二叔丁基邻苯二酚及其混合物中的杂质，所述杂质和PC的总量为所述组合物重量的0.1％至0.8％。 本发明还描述了一种在包含至少一种烯属不饱和单体的混合物中存在于所述聚合抑制组合物中的方法。