Task: Translation
Input (Czech): P°edm tem °e en  je zp sob v²roby cyklopropylkyanidu, jeho  podstata spo  v  v tom,  e se 4-halogenbutyronitril sm ch  alespo  s 0,25 mol rn ho d lu anorganick  soli zvolen  ze souboru zahrnuj c ho halogenidy, s rany a uhli itany sodn , draseln  a lithn  a katalytick²m mno stv m vody za p° tomnosti aprotick ho pol rn ho rozpou t dla a p°i zv² en  teplot  v rozmez  od 50 do 100 .degree.C a vznikl  sm s se p°i t to zv² en  teplot  neutralizuje b z  odvozenou od alkalick ho kovu.\
Output (English): In the present invention there is disclosed a process for preparing cyclopropyl cyanide, wherein the invented process is characterized in that 4-halobutyronitrile is mixed with at least 0.25 mole part of an inorganic salt being selected from the group comprising sodium, potassium and lithium halides, sulfates and carbonates and a catalytic amount of water in the presence of an aprotic polar solvent and at elevated temperature within the range of 50 to 100 degC and the obtained mixture is then neutralized at this elevated temperature with a base derived from an alkali metal.