New-York tribune., 1908-01-26
WOOD PULP FROM SAWMILL WASTE.
United States Consul Reports an Invention
To Be Used by Canadian Company

report from Consul l. Edwin Dudley. Of
Vancouver. states that unusual interest * man
iested in i Sl.Upb.thlD company Orga nZed
in that British Columbian city. owing TO the fact
that ii will use the vast vast material from
the saw and shingle mills. Including the saw
dust. which. is now burned at some expense to
prevent large accumulation. The consul eX-
plains the plans and the proposed processes:
This company first contemplated the estab-
lshment of It's plant at Aberdeen Wash. but
forced TO abandon that location. because IL
was found that the supply Of fresh water was
insufficient. After a thoioush investigation II
finally arranged for the purchase Of eighty
acres opposite Gambler Island Howe Sound
twenty miles from Vancouver. al the entrance Of
Rainy River where there is an abundant supply
of water at all
by utilizing the water power OF the Rainy
River the company viii develop sufficient water
power fo- mechanical and domestic use and FOR
a series Of mechanical grinders for the manu-
facture of ground wood. which IS used 10 sup
plement chemical fibre in the manufacture or
paper The plan is to convey the refuse of the
local mills. Of which there is said to be three
thousand tons in this vicinity. in specially pre-
pared scows 10 The plant. where the entire mass
is be disintegrated into suitable fnen ness Tor
conversion into wood pulp. This will eliminate
the expense incident to the use OF uniform cut
wood. which is said 10 be the only method now
in general use by the paper mills throughout
Eastern Canada and the United States.
one Of the innovations of the new company Is
d patented process whereby IL can use Douglas
and other resinous woods in the manufacture
of wood pulp. Papermakers in the past have
never been able to use woods containing pltCh
and resin for paper purposes, owing TO the ann
, Guilty IN separating the cellulose from the pitcn
resin and essential oils. BY the new process al
those parts are passed off in vapor and the fibre
is recovered by subjecting the mass to sys-
TEN OF pressing
couver complete but small plant for the manu-
featuring of pulp and paper. which fully demon
strates the process and which is both ingenious
and simple. The wood is first placed IN what IS
known a chipping machine and reduced 10
small shavings. The shaVings pass up a hume
and enter dgester. which consists of "a large
perpendicular copper lined circular reservoir
that ordinarily ranges from to II feet in diam
eter and n to As feet in height. The digester Is
filled with a solution of Caustic soda, ana the en-
tire mass of shavings. ranging from elght To zen
tons is thoroughly cooked under a high press
ure of steam for several hours. untll the cehu-
lose is thoroughly released.
The mushy black mass is then removed 10
the draining floor or press where the cauStlc
soda is separated as much as poSSlole from tile
fibre The material then passes 10 the oeatihg
machine, which consists of a wooden or metai
tub ten or fifteen feet long, with round ends,
on the centre of which is partition called mid
feather A roller is provided with knives and
il revolves bedpate of similar knives
The distance between the bedplate and the roller
is regulated by wheel and screw The pulp.
after il passes between. the bedplate and the
roller. flows down the backfall and around the
mid feather back to the starting point. The
machine is also provided with washing cyl
inder which is made that as it revolves it
scoops up the water which flows through its
axis; the pulp Is kept out by fine wire gauze
surrounding the cylinder. large quantity Of
water is admitted into the heater, which is re-
moved by the drum washer. and the pulp is in
this manner rapidly cleansed
During the process OF the beating TINS pulp Is
colored or bleached to any color desired. The
bleaching is accomplished by solution Of chic
ride of lime. After passing through the beating
engine the whole mass is run through a Jordan
refining engine. This machine consists OF a sta
tionary hollow comb, mounted with knives on the
inside. which fit over a solid rapidly revolving
comb mounted with similar knives on the out
side The pulp passes between the combs, and
the knives can be brought close together or
h al he dc
gree of fineness of the pulp can be adjusted
The material is then run into what Is known
a pulp pit, where it is taken up by the large
fourdrinier machines and run into merchantabe
paper of different character and f1neness.
THE plant, as outlined. will have capacity
of $50 tons of finished material week. con-
sisting Of 200 tons Of and 160 tons of
manila wrapping, box boards, building paper,
etc. In addition to the local trade, the COM
pany purposes entering the markets of Austria
liza and New Zealand. Japan and the western
MT tod