Rhodia Operations

Rhodia Chimie

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Roland Jacquot

Philippe Marion

Michel Spagnol

Philippe Leconte

Jean-Roger Desmurs

Georges Cordier

Olivier Buisine

Dominique Labarre

Pascale Colin

Virginie Belliere-Baca

Jean-Emile Zanetto

Olivier Jentzer

Didier Morvan

Philippe Morel

Sophie Deroo

Gerald Bocquenet

Damien Cartigny

Bouchra Rhers

Laurent Elkaim

Jean-Emille Zanetto

Loic Baussaron

Laurence Grimaud

Phillppe Marion

Diesters are prepared by first hydrolyzing dinitrile compounds into imide compounds and then reacting such imide compounds with at least one alcohol.

Production of diesters from dinitrile compounds

The present invention relates to a process for preparing at least one diacid compound, comprising a step of hydrolysis reaction of at least one imide compound, performed in the absence of catalyst.

Process for preparing diacid compounds

The present invention concerns the production of compounds comprising nitrite functions and cyclic imide compounds. More specifically, the invention relates to the production of compounds comprising nitrile functions from compounds comprising carboxylic functions, advantageously of natural and renewable origin, and from methyl-2 glutaronitrile (MGN) or a mixture N of dinitriles comprising methyl-2 glutaronitrile (MGN), ethyl-2 succinonitrile (ESN) and adiponitrile (AdN).

Method for producing compounds comprising nitrile functions

The present invention relates to the manufacture of compounds of general formula I or III including nitrile functions. Specifically, the invention relates to the manufacture of compounds including nitrile functions from compounds which include carboxyl functions and which are advantageously of natural and renewable origin. 

Method for manufacturing compounds including nitrile functions

The production of compounds comprising nitrile functions and of cyclic imide compounds is described. Further described, is the production of compounds comprising nitrile functions from compounds comprising carboxylic functions, optionally of natural and renewable origin, and from a mixture N of dinitriles comprising 2-methylglutaronitrile (MGN), 2-ethylsuccinonitrile (ESN) and adiponitrile (AdN).

Process for producing compounds comprising nitrile functions

The present invention relates to the production of compounds comprising nitrile functions and of cyclic imide compounds. It relates more particularly to the production of compounds comprising nitrile functions from compounds comprising carboxylic functions, advantageously of natural and renewable origin, and from 2-methylglutaronitrile (MGN) or a mixture N of dinitriles comprising 2-methylglutaronitrile (MGN), 2-ethylsuccinonitrile (ESN) and adiponitrile (AdN).

Novel dicarboxylic acid diesters and admixture thereof have the formula (I):R&#x2014;OOC-A-COOR&#x2003;&#x2003;(I)and are advantageously prepared from fusel oils; these are particularly suited for formulation into useful solvent, cosolvent, stripping, crystallization inhibiting, cleaning and degreasing compositions.

Dicarboxylic acid diesters, notably those prepared from fusel oils

A method for preparing a mixture (M) comprising at least an alcohol (Aj), said method comprising the following steps: i) a step in which at least an alcohol (Ai) in gaseous state is oligomerized, thereby producing a mixture (A); ii) a step in which the mixture (A) is condensed to a gaseous stream and to a liquid stream corresponding to a condensed mixture (A); and iii) a step in which the condensed mixture (A) is hydrogenated in the liquid state.

Method for preparing a mixture of alcohols

A hydride transfer process within a reaction between an alcohol and a ketone and in the presence of a heterogeneous catalyst is described. The process can transfer a hydride from an alcohol to a ketone, thus enabling reduction of the ketone and oxidation of the alcohol. Further described, is a process for the simultaneous preparation of cyclohexanone and isopropanol enabling an optimized industrial operation. A mixture of compounds useful for implementing the process and comprising two different ketones and two different alcohols is also described.

Hydride transfer process for ketone preparation

A process for the preparation of compounds containing nitrile functions and, more specifically, compounds containing two nitrile functions, such as succinonitrile and adiponitrile, is described. A process for preparing dintrile compounds obtained by reacting ammonia with an aqueous solution of a dicarboxyl compound in the presence of a silicon orthophosphate catalyst is also described.

Diester compounds are prepared from imide/dinitrile compounds employing a vapor-phase hydrolysis of dinitrile compounds in the presence of alcohol, more particularly from branched dinitrile compounds, such as methylglutaronitrile or branched dinitrile compounds obtained as by-products in a process for the production of adiponitrile by hydrocyanation of butadiene.

Preparation of diesters from imide/dinitrile compounds

Difluoroethanol is produced by hydrogenation, in the presence of an effective amount of a catalyst containing at least one element of Group VIII of the Periodic Table deposited onto a solid, acidic mineral support, of an acetyl halide having the following formula (I), in which formula X is a halogen atom other than a fluorine atom: 

Production of difluoroethanol

The invention relates to a method for producing optionally substituted methylenedioxybenzene. The invention particularly relates to the production of methylenedioxybenzene. The inventive production method is characterized by the fact that it involves the reaction of an optionally substituted catechol with an aldehyde in the presence of a solid acid catalyst selected among: a titanium silicalite and a zeolite that is doped with tin and/or titanium.

Method for producing optionally substituted methylenedioxybenzene

The present invention relates to a process for preparing mixed substituted alkynyl ethers. More particularly, the invention concerns the preparation of mixed ethers derived from a benzyl type alcohol and a substituted alkynyl alcohol. The process of the invention for preparing a benzyl/substituted alkynyl type mixed ether is prepared from a benzyl/alkynyl type mixed ether with a hydrogen atom on the triple bond is characterized in that it consists of reacting a mixed ether derived from a benzyl type alcohol and an alkynyl alcohol with a hydrogen atom on the triple bond with an alkylation agent, in the presence of an anionisation agent.

Method for preparing substituted mixed alkynyl ethers

A subject of the present invention is a process for preparation of fluorinated ketones corresponding to general formula (I) R &mdash;CO&mdash;R in which R and R are as defined in claim 1, characterized in that it consists of reacting two carboxylic acids of Formula (II), R &mdash;COOH and Formula (III), R &mdash;COOH, in the gaseous phase and in the presence of a catalyst comprising at least one oxide of an element chosen from the rare earths, thorium, titanium and aluminum.

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Francheville, France

Roland Jacquot