Abstract: The present invention relates to a process for the recycling of an article comprising a thermoplastic polymer P1 resin, said thermoplastic polymer P1 having been formed from base monomers, said process comprising the following stages: heating said resin in order to convert, at least in part, the thermoplastic polymer P1 into at least two polymers P2, said at least two polymers P2 having a lower molar mass than the molar mass of said polymer P1, cooling said at least two polymers P2 obtained after heating to a temperature substantially equal to or lower than the boiling point of said base monomers, and dissolving said at least two polymers P2 in a solution comprising said base monomers.

Abstract: The invention relates to a process (100) for the recycling of an article based on (meth)acrylic thermoplastic polymer resin, characterized in that it comprises the following steps: introduction (110) of the article into a system suitable for the recycling of thermoplastic polymer, at least partial depolymerization (130) of the (meth)acrylic thermoplastic polymer resin so as to form (meth)acrylate monomers, introduction (140) of a hydrolysis catalyst into a hydrolysis reactor, introduction (150) of water into said hydrolysis reactor, and conversion (160), in the hydrolysis reactor, of at least part of the (meth)acrylate monomers into (meth)acrylic acid. The invention also relates to a system for recycling an article based on (meth)acrylic thermoplastic polymer resin.

Abstract: A process for synthesizing polyamide PA 6-6, including a first step of reacting, in the presence of water, a compound of R0COO—(CH2)4—COOR?0 in which R0 and R?0, which may be identical or different, represent H or a linear or branched alkyl radical comprising from 1 to 4 carbon atoms, with hexamethylenediamine (HMDA), at a temperature of less than or equal to 160° C., to form a reaction medium, and then a second step of heating the reaction medium to a temperature of greater than or equal to 200° C.; the reaction medium also including a compound of R1—COO—(CH2)n—CH?CH—(CH2)n—COO—R2 and/or a compound of R3—(CH2)m—CH?CH—(CH2)n—COO—R4.

Abstract: An intensified continuous process for synthesizing zeolite crystals is described, said process comprising a continuous supply of a continuously prepared gel, said gel then being continuously crystallized, said process comprising at least one application of ultrasound.

Abstract: The invention relates to a mixture of polyoxymethylene dialkyl ethers (POM) having a specific molecular distribution of n as well as its preparation method. The invention also relates to a composition comprising: a) a mixture of polyoxymethylene dialkyl ethers (POM) having a restricted specific molecular distribution b) at least one biocidal agent c) at least one pro-penetrating agent d) at least one dye e) optionally, another additive and water as diluent, It also relates to a non-therapeutic method of preserving and/or embalming a dead human or animal body using the composition, such as the use of this composition for anatomopathological purposes.

Abstract: The invention relates to a composition comprising: a) a mixture of polyoxymethylene dialkyl ethers (POM) having a restricted specific molecular distribution b) at least one biocidal agent c) at least one pro-penetrating agent d) at least one dye e) optionally, another additive and water as diluent. It also relates to a non-therapeutic method of preserving and/or embalming a dead human or animal body using the composition, such as the use of this composition for anatomopathological purposes.

Abstract: The present invention relates to a composition which comprises at least one ?,?-amino-alkanoic acid or ester and at least one alkanoic ester or acid, characterised in that: the ?,?-amino-alkanoic acid or ester has formula H2N—(CH2)n-COOR, wherein n=9 to 13 and R is an alkyl group or a hydrogen; the alkanoic ester or acid has formula R1—COOR2, wherein R1 is a straight or branched alkyl group with formula CmH2m+1 or CmH2m?3, wherein m=6 to 20 and R2 is an alkyl group or a hydrogen; the molar ratio between the alkanoic acid(s) or ester(s) and the ?,?-amino-alkanoic acid(s) or ester(s) is in the range from 0.001 to 0.4%. The present invention also relates to novel methods for obtaining such a composition.

Abstract: A process for the continuous industrial preparation of an alkane-sulphonic acid, from the corresponding alkane and sulphur trioxide, said process being carried out in a solvent which is the alkane-sulphonic acid. The process includes e1) addition of sulphur trioxide in order to maintain an initial molar ratio (alkanesulphonic acid)/(sulphur trioxide), addition of alkane in order to maintain a molar ratio (alkane)/(sulphur trioxide) comprised between 4/1 and 2/1, and continuous withdrawal of the alkanesulphonic acid.

Abstract: A process for synthesizing a product of formula Br—(CH2)n—R by hydrobromination, by reacting: a reagent of formula (I) R1-CH?CH—R2 in which R1 and R2, identical or different, are chosen from H or an alkyl radical comprising 1 to 30 carbon atoms, which is saturated or unsaturated, linear or branched, functionalized or non-functionalized, with a molar excess of HBr relative to the reagent of formula (I), in the presence of a radical initiator, and optionally in the presence of at least one solvent, said process including a step A of mixing at least reagent I and the HBr, each of the latter arriving in the form of a flow of liquid into a mixing device dA.

Abstract: The present invention relates to a process for preparing zeolite crystals continuously, comprising the continuous introduction of a composition capable of generating zeolite crystals into at least one crystallization reaction zone subjected to stirring means, giving said composition a flow characterized by a relative Reynolds number Rer of between 40 and 50 000, and the continuous recovery of the crystals formed according to a flow characterized by a net Reynolds number Ren of between 1 and 1500.

Abstract: The present invention concerns a process for the continuous industrial preparation of an alkanesulphonic acid, from the corresponding alkane and sulphur trioxide, said process being carried out in a solvent which is the said alkane sulphonic acid.

Abstract: A process for the nitrilation of a fatty acid or of a fatty acid ester, which is optionally unsaturated, by reacting the fatty acid or fatty acid ester with ammonia in a reactor operating continuously in the gas phase or in the mixed gas-liquid phase in a temperature range of from 180 to 400° C., in the presence of a solid catalyst comprising at least one metal oxide, the metal of which belongs to column 8 of the periodic table, as a mixture with at least one metal oxide chosen from aluminum oxides, zirconium oxides, niobium oxides, tantalum oxides and tin oxides, the metal oxide(s), the metal of which belongs to column 8, being present in a volume ratio of 0.1 to 0.6 relative to the volume of the mixture of all the oxides.

Abstract: A coaxial connector and a method for manufacturing such a coaxial connector. The coaxial connector includes: a conductive core; a metal shielding surrounding the core; a dielectric arranged between the core and the shielding to insulate them electrically with respect to one another; and a shunt to supply a resistive bridge between the core and the shielding. The shunt includes: a graphite element positioned between the core and the shielding; and a first and a second metal deposit to supply an electrical and mechanical connection between the graphite element and respectively the core and the shielding. A coaxial cable and an electrical device can both include such a coaxial connector.

Abstract: A method and system for preparing a mixture of Guerbet alcohols where one or more primary alcohols of the formula RCH2CH2OH are provided, with R representing hydrogen or a straight or branched chain alkyl group of 1 to 14 carbon atoms. A base and a catalyst are provided, which are mixed with the primary alcohol(s). The resulting mixture is heated to a process temperature above the boiling point of water under reaction conditions and the water resulting from the thus obtained condensation and dehydration of the primary alcohols is then removed constantly. When the Guerbet reaction has reached a certain stage, at least part of the reaction mixture is removed, followed by a separation of the desired Guerbet alcohols from the removed part of the reaction mixture. The other alcohols are then returned to the reaction mixture for obtaining a higher amount of the desired Guerbet alcohols.

Abstract: The invention relates to a novel method for the continuous production of anionic polymers by radical polymerization. The polymers produced by said method have a controlled molecular weight.

Abstract: A process for synthesizing an ?-amino acid compound of formula HOOC—(CH2)r+2—CH2NH2, wherein 4?r?13 from a monounsaturated fatty nitrile compound of formula CH2?CH—(CH2)r—CN the process comprising: 1) a step of hydroformylation of the mono unsaturated fatty nitrile compound by reacting said nitrile with carbon monoxide and di hydrogen 5e-a5 to obtain a nitrile aldehyde compound of formula HOC—(CH2)r+2-CN, then 2) a step of oxidation, in the presence of dioxygen, of the nitrile aldehyde compound to obtain a corresponding nitrile acid compound of formula HOOC—(CH2)r+2-CN, and 3) a step of reduction of the nitrile acid compound to give an w-amino acid of formula HOOC—(CH2)r+2—CH2NH2.

Abstract: The present invention relates to a composition which comprises at least one ?,?-amino-alkanoic acid or ester and at least one alkanoic ester or acid, characterised in that: the ?,?-amino-alkanoic acid or ester has formula H2N-(CH2)n—COOR, wherein n=9 to 13 and R is an alkyl group or a hydrogen; the alkanoic ester or acid has formula R1-COOR2, wherein R1 is a straight or branched alkyl group with formula CmH2m+1 or CmH2m?3, wherein m=6 to 20 and R2 is an alkyl group or a hydrogen; the molar ratio between the alkanoic acid(s) or ester(s) and the ?,?-amino-alkanoic acid(s) or ester(s) is in the range from 0.001 to 0.4%. The present invention also relates to novel methods for obtaining such a composition.

Abstract: The subject of the present invention is a process for synthesizing bifunctional hydrocarbon-based compounds from biomass, comprising a step of fermentation of the biomass and a step of oxidation of the intermediate compounds resulting from the fermentation step.

Abstract: The invention relates to methyl methacrylate characterized in that at least one portion of the carbons thereof is biologically sourced and, more specifically, in that it contains between 0.2×10?10 and 1.2×10?10 wt.-% of 14C in relation to total carbon weight according to the ASTM D6866 standard. The preparation method uses acetone cyanohydrin as a raw material, the acetone cyanohydrin being obtained by condensing cyanohydric acid on acetone, and the methyl methacrylate is prepared using a process involving the addition of methanol. According to the invention, at least one from among the acetone, cyanohydric acid and methanol is obtained by a reaction or series of reactions involving the biomass.

Abstract: The present invention relates to the production of acrolein, acrylic acid or methacrylic acid by dehydration reaction of renewable raw material such as glycerin or hydroxycarboxylic acids, in the presence of a novel catalyst system supported on a carrier having a bimodal structure and a high pore volume and distribution. The dehydration reactions can be carried out for longer operation duration, so that acrolein, acrylic acid or methacrylic acid can be produced at higher productivity and for longer running time.