公开(公告)号：US09617198B2

公开(公告)日：2017-04-11

申请号：US14762384

申请日：2014-01-20

Applicant: RHODIA OPERATIONS

Inventor： Hubert Gayet ,  Denis Revelant ,  Martine Vibert

IPC: C07C45/82 ,  B01D3/00 ,  B01D3/14 ,  B01D3/10

CPC classification number: C07C47/58 ,  B01D3/10 ,  B01D3/141 ,  B01D3/143 ,  C07C45/82

Abstract: The invention relates to a method for the purification of natural vanillin, comprising at least one step in which the natural vanillin is evaporated.

公开(公告)号：US10202328B2

公开(公告)日：2019-02-12

申请号：US14892790

申请日：2014-05-19

Applicant: RHODIA OPERATIONS

Inventor： Denis Revelant ,  Stephanie Foucher ,  Dominique Horbez ,  Philippe Marion

IPC: C07C51/47 ,  C07C51/00 ,  C07C51/43 ,  C07C51/48 ,  C12P7/62

Abstract: A process for extraction of ferulic acid present in an aqueous phase, obtained by treatment of at least one plant material, and also containing polysaccharides, is described, said process comprising at least the following steps: 1) the treatment of said plant material followed by a solid/liquid separation to recover a solid phase and an aqueous liquid phase comprising the ferulic acid and said polysaccharides, 2) the treatment of said liquid phase to selectively separate, on the one hand, the polysaccharides and, on the other hand, the ferulic acid present in an aqueous fraction, 3) the concentration of said aqueous fraction containing the ferulic acid so as to recover a ferulic acid-concentrated stream, 4) the recovery of the ferulic acid in solid form.

公开(公告)号：US09873666B2

公开(公告)日：2018-01-23

申请号：US15021419

申请日：2014-09-11

Applicant: RHODIA OPERATIONS

Inventor： Denis Revelant ,  François Metz ,  Valery Dambrin ,  Marie Chauve

IPC: C07C309/00 ,  C07C313/04 ,  C07C303/32 ,  B01J31/02 ,  C07C303/02 ,  C07C313/02

CPC classification number: C07C313/04 ,  B01J31/0227 ,  C07C303/02 ,  C07C303/32 ,  C07C313/02 ,  Y02P20/582 ,  C07C309/06

Abstract: The invention concerns a method for preparing an oxysulphide and fluorinated derivative, said method comprising the reacting, in the presence of an organic solvent, of: i) at least one compound of formula Ea-COOR (I), in which Ea represents the fluorine atom or a group having 1 to 10 carbon atoms chosen from fluoroalkyls, perfluoroalkyls and fluoroalkenyls and R represents hydrogen, a monovalent cation or an alkyl group, and ii) a sulphur oxide, said method being such that the initial molar ratio (sulphur oxide/compound of formula (I)) is less than 0.4 and the concentration of sulphur oxide dissolved in the reaction medium is kept constant for the entire duration of the reaction to a value of between 0.2% and 3% by weight by means of continually adding said sulphur oxide to the reaction medium.

公开(公告)号：US10017444B2

公开(公告)日：2018-07-10

申请号：US15480068

申请日：2017-04-05

Applicant: Rhodia Operations

Inventor： Hubert Gayet ,  Denis Revelant ,  Martine Vibert

IPC: C07C45/87 ,  C07C47/58 ,  B01D3/00

CPC classification number: C07C47/58 ,  B01D3/10 ,  B01D3/141 ,  B01D3/143 ,  C07C45/82

Abstract: The invention relates to a natural vanillin, which is in the form of an amorphous solid of which the color, in ethanolic solution at 10% by weight, is less than or equal to 200 Hazen, preferably less than or equal to 100 Hazen.

公开(公告)号：US20170204039A1

公开(公告)日：2017-07-20

申请号：US15480068

申请日：2017-04-05

Applicant: Rhodia Operations

Inventor： Hubert Gayet ,  Denis Revelant ,  Martine Vibert

IPC: C07C47/58

CPC classification number: C07C47/58 ,  B01D3/10 ,  B01D3/141 ,  B01D3/143 ,  C07C45/82

Abstract: The invention relates to a natural vanillin, which is in the form of an amorphous solid of which the color, in ethanolic solution at 10% by weight, is less than or equal to 200 Hazen, preferably less than or equal to 100 Hazen.