Improvements in the Purification of Alcoholic Liquids.
Year: 1898

page_text: Date of Application, 27th Oct., 1898
Comminda Cannifinating Last 47th 1.... 1000
A
1000
PROVISIONAL SPECIFICATION.
Improvements in the Purification of Alcoholic Liquids.
I, JOHN THEODORE HEWITT, of 65, Silverdale, Sydenham, in the County of
Kent, Professor of Chemistry in the East London Technical College, do hereby
declare the nature of this invention to be as follows: -
In my Specification No. 15,452 of 1898 I described a process for retaining
aldehydic and ketonic impurities in the still during the distillation of alcohol or
alcoholic liquors by adding to the still a suitable proportion of a salt of a sul-
phonic or carboxylic acid of a primary hydrazine. I there expressed the view
that the addition of a primary hydrazine itself before distillation would be
inadmissible since any excess thereof would be volatilised with the vapours of
water and alcohol and would pass over into the distillate.
By my present invention I add to the still before distillation a primary hydra-
zine in any desired proportion and should any of the hydrazine pass over into
the distillate I remove it by any known means such as by fractional distillation
or by re-distillation after addition of some material which will retain the hydra-
zine in the still, such as a non-volatile acid, or by filtration through charcoal.
Dated this 27th day of October 1898.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in the Purification of Alcoholic Liquids.
I, JOHN THEODORE HEWITT, of 65, Silverdale, Sydenham, in the County of
Kent, Professor of Chemistry in the East London Technical College, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
In my Specification No. 15,452 of 1898 I described a process for retaining
aldehydic and ketonic impurities in the still during the distillation of alcohol or
alcoholic liquors by adding to the still a suitable proportion of a salt of a sul-
phonic or carboxylic acid of a primary hydrazine. I there expressed the view
that the addition of a primary hydrazine itself, before distillation would be
inadmissible since any excess thereof would be volatised with the vapours of
water and alcohol and would pass over into the distillate.
By my present invention instead of adding a salt of a sulphonic or carboxylic
acid of a primary hydrazine I add before distillation a primary hydrazine itself
.

page_text: in any desired proportion, but best in slight excess of the proportion requisite
to combine with the ketonic and aldehydic impurities present in the alcoholic
liquid.
Should any of the hydrazine pass over into the distillate I remove it by any
known means such as by fractional distillation or by re-distillation after addi-
tion of some material which will retain the hydrazine in the still, such as a non-
volatile acid.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed, I declare that what
I claim is:-
The herein described process for purifying alcoholic liquids by adding before
distillation a primary hydrazine and removing by known means from the dis-
tillate any hydrazine which may have passed over therewith.
ABEL & IMRAY,
Agents for the Applicant.