5  5,763,671  6  This  invention  further  relates  in  part  to an  improved  hydroformylation  process  for  producing  aldehydes  which  comprises  (i)  reacting  in  at  least  one  reaction  zone  one  or  more  olefinic  unsaturated  compounds  with  carbon  monoxide  and  hydrogen  in the  presence  of a  metal-organophosphite  This  invention  further  relates  in part  to an  improved  hydroformylation  process  for  producing  aldehydes  which  comprises  (i)  reacting  in at  least  one  reaction  zone  one  or  more  olefinic  unsaturated  compounds  with  carbon  monoxide  and  hydrogen  in the  presence  of a  metal-organophosphite  ligand  complex  catalyst  and  optionally  free  organophosphite  ligand  to  produce  a  reaction  product  fluid  comprising  one or  more  aldehydes  and  (ii)  separating  in at  least  one  separation  zone  or in  said  at  least  one  reaction  zone  the one  or  more  aldehydes  from  said  reaction  product  fluid.  the  improvement  comprising  preventing  and/or  lessening  hydrolytic  degrada› tion  of any  said  organophosphite  ligand  and  deactivation  of  said  metal-organophosphite  ligand  complex  catalyst  by (a)  withdrawing  from  said  at  least  one  reaction  zone  or said  at  least  one  separation  zone  at  least  a  portion  of said  reaction  product  fluid  derived  from  said  hydroformylation  process  and  which  also  contains  phosphorus  acidic  compounds  formed  during  said  hydroformylation  process,  (b)  treating  in  at  least  one  scrubber  zone  at  least  a  portion  of the  withdrawn  reaction  product  fluid  derived  from  said  hydroformylation  process  and  which  also  contains  phosphorus  acidic  com› pounds  formed  during  said  hydroformylation  process  with  This  invention  also  relates  in  part  to an  improved  hydro› formylation  process  for  producing  one  or  more  aldehydes  which  comprises  (i)  reacting  in  at  least  one  reaction  zone  one  or  more  olefinic  unsaturated  compounds  with  carbon  mon› oxide  and  hydrogen  in the  presence  of a  metal› organophosphite  ligand  complex  catalyst  and  optionally  free  organophosphite  ligand  to  produce  a  reaction  product  fluid  comprising  one  or  more  aldehydes  and  (ii)  separating  in at  least  one  separation  zone  or in  said  at  least  one  reaction  zone  the one  or  more  aldehydes  from  said  reaction  product  fluid.  the  improvement  comprising  preventing  and/or  lessening  hydrolytic  degradation  of any  said  organophosphite  ligand  and  deactivation  of said  metal-organophosphite  ligand  com› plex  catalyst  by ( a)  treating  at  least  a  portion  of said  reaction  product  fluid  derived  from  said  hydroformylation  process  and  which  also  contains  phosphorus  acidic  compounds  formed  during  said  hydroformylation  process  by  introducing  water  into  said  at  least  one  reaction  zone  and/or  said  at  least  one  separation  zone  sufficient  to  remove  at  least  some  amount  of the  phosphorus  acidic  compounds  from  said  reaction  product  fluid  and  (b)  treating  in at  least  one  acid  removal  zone  at  least  a  portion  of the  water  which  contains  phosphorus  acidic  compounds  removed  from  said  reaction  product  fluid  with  one  or  more  acid  removal  substances  sufficient  to  remove  at  least  some  amount  of the  phosphorus  acidic  compounds  from  said  water.  This  invention  also  relates  in  part  to an  improved  hydro› formylation  process  for  producing  aldehydes  which  com› prises  (i)  reacting  in at  least  one  reaction  zone  one  or  more  olefinic  unsaturated  compounds  with  carbon  monoxide  and  hydrogen  in the  presence  of a  metal-organophosphite  ligand  complex  catalyst  and  optionally  free  organophosphite  ligand  to  produce  a  reaction  product  fluid  comprising  one  or  more  aldehydes  and  (ii)  separating  in at  least  one  separation  zone  or in  said  at  least  one  reaction  zone  the  one  or  more  aldehydes  from  said  reaction  product  fluid,  the  improvement  comprising  preventing  and/or  lessening  hydrolytic  degrada› tion of  any  said  organophosphite  ligand  and  deactivation  of  said  metal-organophosphite  ligand  complex  catalyst  by (a)  withdrawing  from  said  at  least  one  reaction  zone  or said  at  least  one  separation  zone  at  least  a  portion  of said  reaction  product  fluid  derived  from  said  hydroformylation  process  and  which  also  contains  phosphorus  acidic  compounds  formed  during  said  hydroformylation  process.  (b)  treating  in  at  least  one  acid  removal  zone  at  least  a  portion  of the  withdrawn  reaction  product  fluid  derived  from  said  hydro› formylation  process  and  which  also  contains  phosphorus  acidic  compounds  formed  during  said  hydroformylation  process  with  one  or  more  acid  removal  substances  sufficient  to  remove  at  least  some  amount  of the  phosphorus  acidic  compounds  from  said  reaction  product  fluid,  (c)  returning  the  treated  reaction  product  fluid  to said  at  least  one  reaction  zone  or said  at  least  one  separation  zone,  and  (d)  optionally  replacing  said  one  or  more  acid  removal  substances.  This  invention  yet  further  relates  in  part  to an  improved  hydroformylation  process  for  producing  one  or  more  alde› hydes  which  comprises  (i)  reacting  in at  least  one  reaction  zone  one  or  more  olefinic  unsaturated  compounds  with  carbon  monoxide  and  hydrogen  in the  presence  of a  metal› organophosphite  ligand  complex  catalyst  and  optionally  free  organophosphite  ligand  to  produce  a  reaction  product  fluid  comprising  one  or  more  aldehydes  and  (ii)  separating  in at  least  one  separation  zone  or in  said  at  least  one  reaction  zone  the one  or  more  aldehydes  from  said  reaction  product  fluid,  the  improvement  comprising  preventing  and/or  lessening  hydrolytic  degradation  of any  said  organophosphite  ligand  and  deactivation  of said  metal-organophosphite  ligand  com› plex  catalyst  by  treating  at  least  a  portion  of said  reaction  product  fluid  derived  from  said  hydroformylation  process  and  which  also  contains  phosphorus  acidic  compounds  formed  during  said  hydroformylation  process  by  introducing  one  or  more  acid  removal  substances  into  said  at  least  one  reaction  zone  and/or  said  at  least  one  separation  zone  sufficient  to  remove  at  least  some  amount  of the  phosphorus  acidic  compounds  from  said  reaction  product  fluid  water  sufficient  to  remove  at  least  some  amount  of the  phosphorus  acidic  compounds  from  said  reaction  product  fluid,  (c)  returning  the  treated  reaction  product  fluid  to  said  at  least  one  reaction  zone  or said  at  least  one  separation  zone,  ( d)  withdrawing  from  said  at  least  one  scrubber  zone  at  least  a  portion  of said  water  which  contains  phosphorus  acidic  compounds  removed  from  said  reaction  product  fluid.  (e)  treating  in at  least  one  acid  removal  zone  at  least  a  portion  of the  withdrawn  water  which  contains  phosphorus  acidic  compounds  removed  from  said  reaction  product  fluid  with  one  or  more  acid  removal  substances  sufficient  to  remove  at  least  some  amount  of the  phosphorus  acidic  compounds  from  said  water,  (f)  returning  the  treated  water  to said  at  least  one  scrubber  zone.  and  (g)  optionally  replacing  said  one  or  more  acid  removal  substances.  hydrolytic  degradation  of any  said  organophosphite  ligand  and  deactivation  of said  metal-organophosphite  ligand  com› plex  catalyst  by (a)  treating  in at  least  one  scrubber  zone  at  least  a  portion  of said  reaction  product  fluid  derived  from  said  hydroformylation  process  and  which  also  contains  phosphorus  acidic  compounds  formed  during  said  hydro› formylation  process  with  water  sufficient  to  remove  at  least  some  amount  of the  phosphorus  acidic  compounds  from  said  reaction  product  fluid,  (b)  returning  the  treated  reaction  product  fluid  to  said  at  least  one  reaction  zone  or said  at  least  one  separation  zone.  ( c)  treating  in at  least  one  acid  removal  zone  at  least  a  portion  of the  water  which  contains  phos› phorus  acidic  compounds  removed  from  said  reaction  prod- uct fluid  with  one  or  more  acid  removal  substances  sufficient  to  remove  at  least  some  amount  of the  phosphorus  acidic  compounds  from  said  water.  and  ( d)  returning  the  treated  water  to said  at  least  one  scrubber  zone. 