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    • 10. 发明申请
    • PROCESS FOR RECOVERING AND RECYCLING ALKYL SULFONIC ACID IN THE PRODUCTION OF LIPIDS FROM BIOMASS DERIVING FROM GUAYULE PLANTS
    • WO2021124194A1
    • 2021-06-24
    • PCT/IB2020/062102
    • 2020-12-17
    • VERSALIS S.P.A.
    • BATTISTEL, EzioBALDASSARRE, Mario
    • B01J41/07B01J39/05B01J47/014B01J47/02
    • Process for recovering and recycling alkyl sulfonic acid in the production of lipids from biomass deriving from Guayule plants comprising the following steps: (a) obtaining a hydrolysate comprising 5 -carbon sugars (C5) from the biomass deriving from Guayule plants, by treating said biomass with an aqueous solution of at least one alkyl sulfonic acid having from 1 to 6 carbon atoms, preferably from 1 to 3 carbon atoms, more preferably methanesulfonic acid (CH3-SO3H); (b) contacting the hydrolysate obtained in step (a) with a weak anion exchange resin obtaining the adsorption of said at least one alkyl sulfonic acid in said weak anion exchange resin and an aqueous solution comprising 5 -carbon sugars (C5); (c) regenerating said weak anion exchange resin with an aqueous ammonium hydroxide solution obtaining an aqueous solution comprising the ammonium salt of said alkyl sulfonic acid and ammonium ions; (d) subjecting the aqueous solution comprising the ammonium salt of said alkyl sulfonic acid and ammonium ions obtained in step (c) to vacuum evaporation obtaining a solution comprising the ammonium salt of said alkyl sulfonic acid and ammonium ions, said ammonium ions being present in an amount lower than or equal to 50%, preferably between 10% and 20%, with respect to the total amount of ammonium ions present in the aqueous solution obtained in step (c); (e) contacting the solution containing the ammonium salt of said alkyl sulfonic acid and ammonium ions obtained in step (d) with a strong cation exchange resin obtaining a concentrated aqueous solution of said alkyl sulfonic acid; (f) recycling the concentrated solution of said alkyl sulfonic acid obtained in said step (e) at the aforesaid step (a).