Acetylene, purification

Merkel, "Results of Acetylene Purification at Ludwigshafen," OTS Report, PB 35211, U.S. Department of Commerce, 1944. 

Contact of acetylene with bleaching powder, etc., may lead (as with chlorine itself) to formation of explosive chloroacetylenes. Application of hot water to free a partially frozen acetylene purification system which contained bleaching powder caused a violent explosion to occur. 

The acetylene purification train and exit gas train are interconnected with rubber or Tygon tubing. The greased ball-and-socket joints are tightly clamped together. 

It is necessary that the acetylene entering the reaction flask be of high purity. The acetylene purification train illustrated in Fig. 12 consists of three 500-ml. round-bottomed traps, each containing 250 ml. of concentrated sulfuric acid, followed by a 3-ft. column containing potassium hydroxide and a drying agent such as anhydrous calcium sulfate (Drierite). Empty flasks... 

Acetylene, purification, 39, 58 Acetylene, diphenyl-, 34, 42 y-hydroxypropyl, 33, 68 Acetylenedicarboxyuc acid, dimethyl ESTER, 32, SS Acetylenic glycols, 39, 57 2- -Acetylphenylhydroquinone, 34,1 S-Acetyl- -valeric acid, 31, 3 Acid chlorides, 39, 19 synthesis of, 37, 69... 

When a facility has more than one chemical process, the PSMT develops a priority order for reviews and recommends a review frequency to the facility manager. The frequency usually ranges from once every two to three years for high-hazard-class processes such as explosives manufacture or acetylene purification, to once every five to seven years for low-hazard-class processes such as alcohol... 

The polyunsaturated and hence energy-rich compounds recovered in the acetylene purification stage were thermally treated, and the polymerizate so obtained could be used as fuel without problems. 

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