The invention discloses a
fatty alcohol ether carboxylic acid preparation method which comprises the following steps: the first step, mixing
fatty alcohol ether with deionized water, adding alkali, warming and reacting, then adding a catalyst, keeping pressure under the
oxygen environment to react, finishing reacting until
oxygen pressure does not change again, extruding a material mixed solutionand generating
alcohol ether carboxylate; the second step, performing suction
filtration on the
mixed solution obtained in the first step to obtain filtrate and
filter cake, utilizing deionized waterto wash the
filter cake and storing the
filter cake in alkali liquor to be applied to the next oxidizing reaction, wherein the filtrate is a
fatty alcohol ether
carboxylate solution; the third step, adding acid into the filtrate obtained in the second step, warming ad reacting, then adding inorganic salt to be stirred evenly, standing and layering and obtaining fatty
alcohol ether carboxylic acidfrom the upper layer. The fatty
alcohol ether
carboxylic acid preparation method disclosed by the invention has the advantages of simple technological process, production process easy to control, highproduct purity, stable quality, green and environment-friendly production process, quick
reaction speed, low
energy consumption and more
economic production process.