REGENERATION  OF  PURE  SULPHUR,  ETC. 
545 
manganite  of  calcium  dissolved  in  solution  of  oxychloride  of 
calcium. 
I  may  be  permitted  to  mention,  in  conclusion,  that,  while  there 
is  every  prospect,  from  the  rapidity  with  which  the  new  process 
of  manufacturing  chlorine  has  been  and  is  being  adopted  both 
in  this  country  and  on  the  Continent,  that,  within  a  period  to  be 
measured  only  by  months,  nearly  all  the  chlorine  made  in  the" 
world  will  be  made  by  it,  there  is  every  likelihood  that,  in  nearly 
all  cases,  a  portion  of  the  hydrochloric  acid  saved  by  it  will  be 
applied  to  the  recovery  of  sulphur  from  alkali-waste.    The  chief 
reason  why  the  recovery  of  sulphur  from  alkali- waste  has  been 
so  little  practised  hitherto  is  that  the  manufacturers  have  con- 
sidered ir  more  profitable  to  use  all  their  acid  for  the  manufac- 
ture of  bleaching-powder  than  to  use  any  part  of  it  for  the  re- 
covery of  sulphur  ;  but  the  process  which  I  have  had  the  honor  to 
describe  will  enable  them  to  make  even  more  bleaching-powder 
than  they  have  made  hitherto,  and  yet  have  enough  acid  left  to 
permit  of  their  applying  to  all  their  alkali-waste  the  only  process 
for  the  recovery  of  sulphur  therefrom  which  as  yet  has  been 
found  practically  successful ;  and  I  am  able  to  state  that  this 
application  of  a  portion  of  the  acid  saved  by  my  process  will  be 
extensively  adopted. — Chem,  News^  Sept.  3,  1869. 
REGENERATION  OF  PURE  SULPHUR  FROM  THE  RESIDUES 
OF  THE  MANUFACTURE  OF  SODA. 
By  Max  Schaffner. 
The  author's  process,  which  is  vforked  at  Aussig  on  the  Elbe, 
yields  chemically  pure  sulphur  and  is  superior  to  that  of  P.  W. 
Hoffmann  and  L.  Mond,  the  results  of  which  have  only  the  value 
of  pyrites.  The  process  is  divided  into  three  parts  :  the  prepa- 
ration of  the  sulphur  liquors,  decomposition  of  the  same,  and 
preparation  of  chemically  pure  sulphur. 
For  the  preparation  of  the  liquors  the  soda  residues  are  heaped 
up  in  the  air  for  oxidation  ;  after  some  time  the  heaps  become 
heated  and  polysulphurets  are  formed,  which  on  further  oxida- 
tion form  some  hyposulphites.  After  several  weeks  the  heaps 
become  yellowish-green  in  the  centre,  and  are  then  fit  for  ex- 
36 
