FIELD: chemistry.
SUBSTANCE: invention can be used in chemical industry. To obtain HCl from HCl-containing gas stream said HCl-containing gas stream with temperature from -20 °C to 25 °C is fed into adiabatic absorption plant, where it is brought into contact with water taken as an absorbent. At that, head gas flow and water solution of HCl product is formed. Head gas flow temperature is at least 70 °C and not more than 95 °C. Concentration of HCl in water solution of HCl product is in range of 5–20 wt. %. HCl-containing gas stream is obtained as a by-product of the hydrogenation step, on which the feedstock containing monochloroacetic acid (MCA) and dichloracetic acid (DCA), reacts with hydrogen to form an HCl-containing gas stream and a product stream containing MCA and a reduced amount of DCA.
EFFECT: invention reduces content of organic pollutants in HCl-containing gas stream.
11 cl, 2 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR OBTAINING MONOCHLORACETIC ACID | 2016 |
|
RU2674474C1 |
| ELECTROCHEMICAL METHOD OF PRODUCING HALOGENATED COMPOUND CONTAINING CARBONYL GROUP | 2007 |
|
RU2423553C2 |
| METHOD OF SEPARATING MONOCHLOROACETIC ACID AND DICHLOROACETIC ACID BY EXTRACTIVE DISTILLATION | 2012 |
|
RU2599790C2 |
| METHOD FOR HYDRODECHLORINATION OF STARTING MATERIAL CONTAINING DICHLOROACETIC ACID | 2016 |
|
RU2724102C2 |
| METHOD FOR MONOCHLOROACETIC ACID AND DICHLOROACETIC ACID SEPARATION BY EXTRACTIVE DISTILLATION USING ORGANIC SOLVENT | 2013 |
|
RU2621054C2 |
| PROCESS FOR PURIFICATION OF LIQUID FEED COMPRISING MCA AND DCA | 2012 |
|
RU2609408C2 |
| METHOD OF PRODUCING SIGNIFICANTLY PURE MONOCHLOROACETIC ACID | 2007 |
|
RU2451665C2 |
| METHOD OF OBTAINING MONOCHLORACETIC ACID | 2003 |
|
RU2326106C2 |
| METHOD OF OBTAINING MONOCHLORACETIC ACID | 2009 |
|
RU2402524C1 |
| METHOD OF OBTAINING ISOCYANATES | 2010 |
|
RU2546125C2 |
