1858
THE NEW ZEALAND GAZETTE.
[No. 80

the fat therefrom by volatile solvents, eliminating the
residual solvent therefrom, depotashing it, rinsing it, and
then drying it, substantially as described. (16.) The process
of cleaning and treating wool in a digester which con-
sists in first removing the fat therefrom by volatile
solvents, eliminating the residual solvent therefrom, de-
potashing and rinsing it, and then subjecting it to the
action of a carbonising solution, substantially as described.
(17.) The process of cleaning and treating wool in a digester
which consists in first removing the fat therefrom by vola-
tile solvents, eliminating the residual solvent therefrom,
depotashing and rinsing it, subjecting it to the action of a
carbonising solution, and then drying and carbonising it,
substantially as described. (18.) The process of cleaning
and treating wool in a digester which consists in first remov-
ing the fat therefrom by volatile solvents, eliminating the
residual solvent therefrom, depotashing and rinsing it, sub-
jecting it to the action of a carbonising solution, drying and
carbonising it, and then neutralising the carbonising agent,
substantially as described. (19.) The process of cleaning
and treating wool in a digester which consists in first
removing the fat therefrom by volatile solvents, eliminat-
ing the residual solvent therefrom, depotashing and rins-
ing it, subjecting it to the action of a carbonising solution,
drying and carbonising it, neutralising the carbonising agent,
and finally rinsing and drying it, substantially as described.
(20.) The method of removing residual solvent from wool
(and other material) which consists in subjecting it to the
action of air circulated in a closed circuit, in combination
with means for cooling and reheating the same, substantially
as described. (21.) The method of removing residual solvent
from wool (and other material) which consists in subjecting it
to the action of air, then cooling the air to remove a portion
or nearly all the solvent vapour therefrom, then heating
the air and repassing it through the wool, then cooling
it to remove the volatilised solvent therefrom, continuing
the reheating, repassing, and recooling of the air as long as
suitable, and finally allowing it to escape in the atmosphere,
substantially as described. (22.) The method of removing
residual solvent from wool (and other material) which con-
sists in passing hot air through it, then cooling the air to
condense the solvent therefrom, then reheating the air,
then repassing it through the material, then cooling it to
remove therefrom the bulk of the solvent which it has taken
up, continuing the reheating, repassing, and recooling of the
air as long as suitable, then passing it through an oil con-
denser to remove the remaining traces of solvent, and finally
allowing it to escape into the atmosphere, substantially as
described. (23.) The method of removing residual solvent
from wool (and other material) which consists in subjecting
it to the action of air in conjunction with steam or aqueous
vapours, then cooling the mixture of air and vapour to con-
dense the solvent and water therefrom, then reheating the
air, and adding steam or aqueous vapour thereto, then
repassing it through the wool, then cooling the mixture to
again remove the solvent and water therefrom, continuing
the passing of the air and steam or aqueous vapours through
the wool and the condensing of the water and solvent there-
from as long as suitable, and finally allowing the air to
escape into the atmosphere, substantially as described.
(24.) The method of removing residual solvent from wool
(and other material) which consists in subjecting it to the
action of hot air in conjunction with steam or aqueous
vapours, then cooling the mixture of air and vapour to con-
dense the solvent and water therefrom, then reheating the
air and adding steam or aqueous vapour thereto, then re-
passing it through the wool, then cooling the mixture to
again remove the solvent and water therefrom, continuing
the passing of the air and steam or aqueous vapour through
the wool and the condensing of the water and solvent there-
from as long as suitable, and finally allowing the air to
escape into the atmosphere, substantially as described.
(25.) The method of removing residual solvent from wool
(and other material) which consists in subjecting it to the
action of air or other gas in conjunction with a vacuum,
then cooling the same to remove a portion or nearly all the
solvent vapour therefrom, then heating the air or other gas
and repassing it through the wool, then cooling it to remove
the volatilised solvent therefrom, continuing the reheating,
repassing, and recooling of the air or other gas as long as
suitable, and finally allowing it to escape into the atmosphere,
substantially as described. (26.) The method of removing
residual solvent from wool (and other material) which con-
sists in subjecting it to the action of air or other gas in con-
junction with steam or aqueous vapours and a vacuum, then
cooling the same to remove the solvent and water therefrom,
then reheating and repassing it through the wool, then cooling
it to again remove the solvent and water therefrom, continu-
ing the passing of the air or other gas and steam or aqueous
vapours through the wool and the condensing of the water
and solvent therefrom as long as suitable, and finally allow-
ing the air to escape into the atmosphere, substantially as
described. (27.) The method of removing residual solvent
from wool (and other material) which consists in subjecting
it to the action of air, then cooling the air to remove a por-
tion or nearly all of the solvent therefrom, then reheating
the air and passing it through the wool, repeating the cool-
ing, heating, and passing of the air through the wool as long
as required, then allowing it to escape into the atmosphere
after removing the solvent which it carries therefrom, and
finally washing the wool for the removal of the potash-salts
therefrom, substantially as described. (28.) The improved
method of removing residual solvent from wool (and other
material) in gaseous or vapour form which consists in sub-
jecting it to the action of steam in conjunction with a
vacuum, substantially as described. (29.) The improved
method of removing residual solvent from wool (and other
material) in gaseous or vapour form which consists in sub-
jecting it to the action of steam in conjunction with a vacuum
at a temperature below the point at which the material
would be injured by heat, substantially as described.
(30.) The improved method of removing residual solvent
from wool (and other material) in gaseous or vapour form
which consists in passing steam through it at a temperature
below the point at which the material would be injured by
heat. (31.) The improved method of removing residual
solvent from wool (and other material) in gaseous or vapour
form which consists in subjecting it to the action of aqueous
vapour in conjunction with a vacuum, substantially as de-
scribed. (32.) The improved method of removing residual
solvent from wool (and other material) in gaseous or vapour
form which consists in passing aqueous vapour through it at
a temperature below the point at which the material would
be injured by heat, substantially as described. (33.) The
improved method of treating wool which consists in subjec-
ting it to the action of steam in conjunction with a vacuum to
volatilise the residual solvent therefrom, and then removing
the potash or potash-salts therefrom, substantially as de-
scribed. (34.) The improved method of treating wool which
consists in subjecting it to the action of aqueous vapour in
conjunction with a vacuum to volatilise the residual solvent
therefrom, and then removing the potash or potash-salts
therefrom, substantially as described. (35.) The im-
proved method of treating wool which consists in passing
steam through it at a temperature below the point
at which the material would be injured by heat, to
volatilise the residual solvent therefrom, then washing
it, and finally drying it, substantially as described.
(36.) The improved method of treating wool which consists in passing aqueous vapour through it at a temperature below
the point at which the material would be injured by heat, to
volatilise the residual solvent therefrom, then washing it,
and finally drying it, substantially as described. (37.) The
method of removing residual solvent from wool which con-
sists in floating the solvent to the top of the vessel contain-
ing the wool by means of water or aqueous solutions, then
distilling off the solvent from the surface of the water or
aqueous solution, substantially as described. (38.) The
method of removing residual solvent from wool which con-
sists in removing the bulk of the residual solvent from the
wool by pressure, then floating the remainder of the solvent
to the top of the vessel containing the wool by the intro-
duction of water or aqueous solutions into the vessel, and
then distilling off the solvent from the water or aqueous
solution, substantially as described. (39.) The method of
removing residual solvent from wool which consists in float-
ing the solvent to the top of the vessel or precipitating said
solvent to the bottom of the vessel containing the wool by
the introduction of water or aqueous solutions into said
vessel, and then separating the solvent from the water or
aqueous solutions, substantially as described. (40.) The
method of removing residual solvent from wool which con-
sists in removing the bulk of the residual solvent
from the wool by pressure, then floating the remainder
of the solvent to the top of the vessel or precipitating said
solvent to the bottom of the vessel containing the wool by
the introduction of water or aqueous solutions into said
vessel, and then separating the solvent from the water or
aqueous solutions, substantially as described. (41.) The
method of removing residual solvent from wool which con-
sists in introducing water or aqueous solutions, hot or cold,
into the digester containing the wool, then eliminating the
floating solvent from the surface of the water or aqueous
solution, or the precipitated solvent from the bottom of the
digester, then separating the bulk of the water or aqueous
solutions from the wool, whereby the bulk of the potash or
potash-salts is also removed therefrom, substantially as de-
scribed. (42.) The method of removing residual solvent
from wool which consists in removing the bulk of the resi-
dual solvent from the wool by pressure, then introducing
water or aqueous solutions, hot or cold, into the digester
containing the wool, then eliminating the floating solvent
from the surface of the water or aqueous solutions or the
precipitated solvent from the bottom of the digester, then
separating the bulk of the water or aqueous solutions from
the wool, whereby the bulk of the potash or potash-salts
is also removed therefrom, substantially as described. (43.) The method of removing residual solvent from wool