CONVERSION METHOD

摘要

A PROCESS IS DESCRIBED FOR THE PREPARATION OF WATER-SOLUBLE CELLULOSE HYDROLYSIS PRODUCTS, WHICH COMPRISES ADMIXING CELLULOSE WITH AN IONIC LIQUID CAPABLE OF SOLVATING OR DISSOLVING AT LEAST SOME OF THE CELLULOSE, SAID IONIC LIQUID BEING A COMPOUND COMPRISED SOLELY OF CATIONS AND ANIONS AND WHICH EXISTS IN A LIQUID STATE AT A TEMPERATURE AT OR BELOW 150 °C, THE CATIONS IN SAID IONIC LIQUID HAVING THE GENERAL FORMULA (I), IN WHICH Z REPRESENTS A NITROGEN OR PHOSPHORUS ATOM, R1 REPRESENTS A METHYL OR ETHYL GROUP, EACH OF R2 AND R3, WHICH MAY BE THE SAME OR DIFFERENT, IS SELECTED FROM C4-3ALKYL, OPTIONALLY-SUBSTITUTED BENZYL, OPTIONALLY-SUBSTITUTED PHENYL, AND C5-7 CYCLOALKYL, AND R4 REPRESENTS C1-8 ALKYL, OPTIONALLY-SUBSTITUTED BENZYL, OPTIONALLY-SUBSTITUTED PHENYL OR C5-7CYCLOHEXYL; IN WHICH THE OPTIONAL SUBSTITUENTS ON A BENZYL OR PHENYL RING ARE ONE, TWO OR THREE SUBSTITUENTS SELECTED FROM C1-4ALKYL OR ALKOXY GROUPS, HALOGEN ATOMS AND NITRO GROUPS; AND TREATING THE RESULTING SOLVATE OR SOLUTION WITH AN ACID IN THE PRESENCE OF WATER, SAID ACID HAVING A PKA IN WATER OF LESS THAN 2 AT 25°C.