Manufacture of Artificial Caoutchouc.
Year: 1892

page_text: Date of Application, 30th Aug., 1892
Complete Specification Left, 30th June, 1893-Accepted, 30th Nov., 1893
POLARITICATION.
Manufacture of Artificial Caoutchouc.
I, ARTHUR FRENCH ST. GEORGE of Earlswood, Redhill in the County of
Surrey, Electrician and Chemist, do hereby declare the nature of this invention to
be as follows:-
My invention relates to the manufacture of artificial caoutchouc, which 1 effect
in the following manner. Through an inclined tube of small diameter such as
th inch or less, which is kept heated, I pass upwards spirits of turpentine which
become vaporised in passing along the tube. I direct the issuing vapour against a
spray of hydrochloric acid which has the effect of throwing down solid fragments
of caoutchouc floating on the acid. I remove these fragments and thoroughly wash
them, when they are available for all the purposes to which cleansed masticated
caoutchouc is applicable. The vapour issuing from the tube may be condensed
by cooling, and the resulting liquid being agitated with hydrochloric acid the
caoutchouc fragments are produced.
Dated this 30th day of August 1892.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Manufacture of Artificial Caoutchouc.
I ARTHUR FRENCH ST. GEORGE of Earlswood, Redhill in the County of
Surrey Electrician and Chemist do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
My invention relates to the manufacture of artificial caoutchouc which I effect
in the following manner. Through an inclined tube of small diameter such as
th of an inch or less which is kept heated I pass upwards spirits of turpentine
which become vaporised in passing along the tube. I direct the issuing vapour
against a spray of hydrochloric acid which has the effect of throwing down solid
fragments of caoutchouc.
I remove these fragments and thoroughly wash them when they are available for
all the purposes to which cleansed masticated caoutchouc is applicable. The vapour
issuing from the tube may be condensed by cooling and the resulting liquid being
agitated with hydrochloric acid the caoutchouc fragments are produced.
I do not confine myself to the use of any particular shape or position of tube in
carrying out my invention but I prefer to employ a tube of small diameter such as
4th or th inch or less. I have observed that a flattened tube gives the best
results.
Since the date of my application (August 30th 1892) for a Patent for my
invention I have ascertained that artificial caoutchouc has been obtained or is
stated to have been obtained by M. Bourchadat and by Dr. Tilden and others in
minute quantities from certain distillates derived from spirits of turpentine and I
make no claim to the production of caoutchouc by such methods disclosed prior to
the date of my Provisional Specification No. 15544 August 30th 1892. I do not
confine myself to the use of hydrochloric acid as other acids may be used.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. The manufacture of artificial caoutchouc from spirits of turpentine by passing
the turpentine through a heated tube so as to vaporise it and mixing the vapour
with hydrochloric or other acid so as to condense and solidify the vapour all
substantially as described.
2. The manufacture of artificial caoutchouc from spirits of turpentine by passing
the turpentine through a heated tube so as to vaporise it condensing the vapour
and mixing the condensed vapour in a liquid form with hydrochloric acid or other
acid all substantially as described.
Dated this 30th day of June 1893.
ARTHUR FRENCH ST. GEORGE.