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1. (WO2019043249) HYBRID PROCESS FOR PRODUCING HIGH-PURITY PARA-XYLENE WITH TOLUENE SOLVENT
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Pub. No.: WO/2019/043249 International Application No.: PCT/EP2018/073734
Publication Date: 07.03.2019 International Filing Date: 04.09.2018
IPC:
C07C 7/13 (2006.01) ,C07C 7/14 (2006.01) ,C07C 15/08 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
7
Purification, separation or stabilisation of hydrocarbons; Use of additives
12
by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers
13
by molecular-sieve technique
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
7
Purification, separation or stabilisation of hydrocarbons; Use of additives
14
by crystallisation; Purification or separation of the crystals
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
15
Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic part
02
Monocyclic hydrocarbons
067
C8H10 hydrocarbons
08
Xylenes
Applicants:
IFP ENERGIES NOUVELLES [FR/FR]; 1 & 4 avenue de Bois Préau 92500 RUEIL-MALMAISON, FR
ARKEMA FRANCE [FR/FR]; 420 rue d'Estienne d'Orves 92700 COLOMBES, FR
Inventors:
LAROCHE, Catherine; FR
JOSSERAND, Morgane; FR
RICHARD, Danielle; FR
PEREZ-PELLITERO, Javier; FR
BOUVIER, Ludivine; FR
Priority Data:
175812904.09.2017FR
Title (EN) HYBRID PROCESS FOR PRODUCING HIGH-PURITY PARA-XYLENE WITH TOLUENE SOLVENT
(FR) PROCEDE HYBRIDE DE PRODUCTION DE PARAXYLENE DE HAUTE PURETE AVEC SOLVANT TOLUENE
Abstract:
(EN) The present invention relates to a hybrid process for producing high-purity para-xylene from a feedstock of fractions of aromatic hydrocarbon isomers containing 8 carbon atoms, in liquid phase, comprising: a) a step of simulated countercurrent adsorption liquid chromatography separation of the para-xylene by means of a zeolite adsorbent and of a desorption solvent, wherein said adsorbent comprises: -at least one faujasite-type major zeolite having a unit cell parameter "a" of greater than 25 100 Å; -barium such that the barium oxide BaO content is between 30% and 41% by weight, limits included, relative to the total weight of the adsorbent, so as to obtain a purified para-xylene stream; b) a step of crystallization of the para-xylene from the purified para-xylene stream resulting from the separation step, at a temperature of between 0 and -25°C, followed by washing of the crystals with a washing solvent, so as to obtain the high-purity para-xylene, wherein the desorption solvent in the separation step and the washing solvent in the crystallization step are toluene.
(FR) La présente invention concerne un procédé hybride de production de para-xylène de haute pureté à partir d'une charge de coupes d'isomères d'hydrocarbures aromatiques contenant 8 atomes de carbone, en phase liquide, comprenant : a) une étape de séparation par chromatographie liquide par adsorption à contre-courant simulé du para-xylène au moyen d'un adsorbant zéolithique et d'un solvant de désorption, ledit adsorbant comprenant : -au moins une zéolithe majoritaire de type faujasite de paramètre de maille « a » supérieur à 25,100 Å -du baryum telle que la teneur en oxyde de baryum BaO soit comprise entre 30% et 41 % poids bornes incluses, par rapport au poids total de l'adsorbant, pour obtenir un flux de paraxylène purifié; b) une étape de cristallisation du paraxylène à partir du flux purifié de paraxylène issu de l'étape de séparation, à une température comprise entre 0 et -25°C, suivie d'un lavage des cristaux avec un solvant de lavage, pour obtenir le paraxylène de haute pureté, le solvant de désorption dans l'étape de séparation et le solvant de lavage dans l'étape de cristallisation étant le toluène.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)