| 摘要 |
A METHOD FOR EFFICIENTLY PRODUCING A CONCENTRATE FROM A PASTE OF?-SULFO-FATTY ACID ALKYL ESTER SALT IS PROVIDED. THE METHOD INCLUDES THE STEPS OF (1)CONCENTRATING A PASTE CONTAINING ?-SULFO-FATTY ACID ALKYL ESTER SALT WITH A MOISTURE CONTENT OF 23 TO 32 MASS% WHILE GENERATING A STREAM OF THE PASTE IN THE FORM OF A THIN FILM USING A ROTARY THIN-FILM EVAPORATOR SO THAT THE MOISTURE CONTENT OF A MIXED PASTE TO BE OBTAINED IN STEP (2) CAN REACH 8 TO 16 MASS%, THEREBY OBTAINING A STREAM OF CONCENTRATED PASTE IN THE FORM OF A THIN FILM; (2) COLLECTING THE STREAM OF THE CONCENTRATED PASTE IN THE FORM OF A THIN FILM TO MIX THE SURFACE PORTION AND THE INNER PORTION OF THE THIN FILM, THEREBY OBTAINING A MIXED PASTE; AND (3) ADDITIONALLY CONCENTRATING THE MIXED PASTE WHILE GENERATING A STREAM OF THE PASTE IN THE FORM OF A THIN FILM USING A ROTARY THIN-FILM EVAPORATOR, THEREBY OBTAINING A CONCENTRATE OF ?-SULFO-FATTY ACID ALKYL ESTER SALT WITH A MOISTURE CONTENT OF 5 MASS% OR LESS. |
