Method for producing of ultra-clean and high-purity electronic grade reagents

A method for producing ultra-clean and high-purity hydrochloric acid comprising the following steps:

• step 1:
• adding a dearsenical agent to industrial grade hydrochloric acid at room temperature and reacting for 0.5-1.5 hours to remove arsenic;
• filtering the hydrochloric acid and collecting a filtrate;
• step 2:
• atmospherically rectifying the filtrate at a temperature of 115-116° C. in a top part of a rectifying column with 0.5-1.5 meter/second gas flow rate in the column, and heating steam to 118-120° C. to produce overheated steam during the rectification;
• then filtering the overheated steam through a microporous membrane having 0.1 μm apertures;
• and
• step 3:
• condensing the overheated steam filtered in step 2 and collecting a fraction, and filtering the fraction through a microporous membrane.