TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Method: The physical treatment is dilution, concentration, evaporation, distillation, stripping, liquid/liquid extraction and/or adsorption operation. The chemical treatment is oxidation, reduction, neutralization, complexation and/or precipitation operation. The biological treatment is aerobic and/or anaerobic bacterial treatment. The treatment comprises stripping operation(s) carried out with steam followed by oxidation operation(s) carried out in the presence of an oxidizing agent containing active chlorine. The first and second steps are carried out in equipment produced from or covered with materials that are resistant to the basic compound under the reaction conditions, settling conditions and treatment conditions, and resistant to the oxidizing agent under the treatment conditions. The electrolysis process is carried out at 0-120 degrees C and at a pressure 0.01-5 bar absolute. The electrolysis process is carried out in a diaphragm electrolysis cell or in a membrane electrolysis cell, and produces hydrogen, chlorine and sodium hydroxide. A fraction of the chlorine is reacted with silicon, high silicon ferrosilicon, silicon carbide and/or silica and carbon in order to obtain silicon tetrachloride, and/or with ethylene in order to obtain 1,2-dichloroethane and/or carbon monoxide in order to obtain phosgene.    TECHNOLOGY FOCUS - METALLURGY - Preferred Components: The composition contains less than or equal to 500 mg/kg polyvalent metals and active chlorine containing 0.001-1 g/kg chlorine. The materials that are resistant to the basic compound are steel, stainless steel, nickel, or enameled steel. The materials that are resistant to oxidizing agent are titanium, enameled steel or Hastelloy C(RTM: nickel-based alloy).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The composition further comprises acetone, acrolein, 2-butanone, isopropanol, 3-methoxy-1,2-epoxypropane, cyclopentanone, epichlorohydrin, chloroacetone, hydroxyacetone (acetol), cyclohexanol, 1,2,3-trichloropropane, 2,3-epoyxy-1-propanol (glycidol), 2-chloro-2-propen-1-oll, 3-chloro-2-propen-1-ol cis, 1-methoxy-3-chloropropane-2-ol, 3-chloro-1-propane-1-ol, 3-chloro-2-propen-1-ol trans, 1,3 cyclohexanedione, chloropropylether, 1,3-dichloro-2-propanol, phenylpropionate, 2,3-dichloro-1-propanol, phenol, glycerol, 1-chloro-2,3-propanediol, 2-chloro-l,3-propanediol, glycerol, cyclic diglycerols, glyceraldehydes, formaldehyde, acetaldehyde, propionaldehyde, and/or butyraldehyde. The carboxylic acid is 1-10C carboxylic acid.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The materials that are resistant to the basic compound can be polypropylene or PTFE. EXAMPLE - A 1 L glass thermostated reactor was charged with 258.76 g of 1,3-dichloropropan-2-ol. About 397.1 g of 19.1 wt.% aqueous solution of sodium hydroxide was added to the flask over 20 minutes at 25 degrees C with vigorous stirring. At the end of the addition, the resulting mixture was transferred into a separating funnel. Recovered were 179.39 g of organic fraction, the density of which was 1.185, and 488.95 g of a second fraction, the density of which was 1.182, where the total organic carbon content (TOC) of which was 8.7 g of C/l. An aliquot part of the second fraction was subjected to an evaporation operation under a vacuum of 150 torr at 90 degrees C until 14.6 wt.% of a condensed evaporate and of an evaporation residue, of which the TOC was 0.69 g C/l and of which the main organic constituent was 3-chloro-l,2-propanediol, was recovered. Evaporation residue of the aqueous fraction contained (g/kg) sodium chloride (265), epichlorohydrin (0.09), 1,3-dichloropropanol (less than 0.5), 3-chloro-1,2-propanediol (0.7), glycerol (less than 0.1), chloroacetone (less than 0.1), hydroxyacetone (less than 0.1) and glycidol (0.07). The TOC of the evaporation residue was 0.69.