close

Вход

Забыли?

вход по аккаунту

?

GB401008

код для вставкиСкачать
[loading]
«
Click the Minesoft logo at anytime to completely reset the Document
Explorer.
[1][(4)__Full Text.......]
Click to view (and print) basic analytics showing the makeup of
discovered items in this publication. [help.png]
[2][_] (19/ 60)
You can use the refine box to refine the discovered items in the
sections below.<br/>Simply type what you are looking for, any items
that do not match will be temporarily hidden. [3]____________________
[4][_]
Molecules have been hidden so that you can clearly see the results
identified from your search result.<br/><br/>Please click here to
re-instate all molecules found in this document.
Molecule
(10/ 51)
[5][_]
Copper
(20)
[6][_]
Calcium
(15)
[7][_]
Hydrogen
(3)
[8][_]
Nitrogen
(3)
[9][_]
ammonia
(2)
[10][_]
barium
(2)
[11][_]
magnesium
(2)
[12][_]
strontium
(2)
[13][_]
Ammonia Hydrogen Hydrogen
(1)
[14][_]
Nitrogen Nitrogen Ammonia
(1)
[15][_]
Molecules have been hidden so that you can clearly see the results
identified from your search result.<br/><br/>Please click here to
re-instate all molecules found in this document.
Physical
(6/ 6)
[16][_]
0.05 percent
(1)
[17][_]
0.12 percent
(1)
[18][_]
1 to 10 litres
(1)
[19][_]
approximately 1 percent
(1)
[20][_]
concentration of 0.2 percent
(1)
[21][_]
thirty minutes
(1)
[22][_]
Molecules have been hidden
identified from your search
re-instate all molecules found
Generic
(2/ 2)
[23][_]
alkaline earth metals
(1)
[24][_]
metal
(1)
[25][_]
Molecules have been hidden
identified from your search
re-instate all molecules found
Gene Or Protein
(1/ 1)
[26][_]
Thie
(1)
so that you can clearly see the results
result.<br/><br/>Please click here to
in this document.
so that you can clearly see the results
result.<br/><br/>Please click here to
in this document.
Publication
_________________________________________________________________
Number GB401008A
i»?
Title
_________________________________________________________________
EN Title Improvements in or relating to the refining of copper
Abstract
_________________________________________________________________
Copper of high conductivity is obtained by melting copper containing
calcium , barium , strontium , or magnesium which has been added as a
deoxidizer, and passing a substantially inert gas through the melt to
remove partially, or completely, the excess of the deoxidizer.
Hydrogen , nitrogen , or ammonia may be used as an inert gas and may
be preheated.
The melt may be mechanically agitated.
Description
_________________________________________________________________
PATENT SPECIFICATION
Convention Date (United States): May 9, 1931.
Application Date (In United Kingdom): May 9, 1932. No. 13,321/32.
Complete Accepted: Nov. 9, 1933.
COMPLETE SPECIFICATION.
Improvements in or relating to the Refining of Copper .
We, Tim ROEiSSLER and HAS SLACHER CHEMICAL COMPANY, of Niagara Falls,
New York, United States of America, a Company organised and existing
under the laws of the State of Delaware, United States of America, 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:This invention relates to the refining of copper and more particularly
to the removal of deoxidising constituents such as calcium from copper
for the purpose of obtaining copper of high conductivity standard.
When copper is deoxidized by treatment with cal.,ium, ian excess of
calcium is inevitably used and a small amount remains in the
deoxidized copper . The removal of this rEsidual calcium is important
because
its
presence
considerably
decreases
the
electrical
conductivity of the copper . -Up to a concentration of 0.2 percent ,
each 0.05 percent of calcium reduces the conductivity of the copper
approximately 1 percent . Small amounts of calcium also increase the
brittleness of the copper to a marked degree, rendering such copper
less suitable for use as wire.
Gas Used.
Nitrogen Nitrogen Ammonia Ammonia Hydrogen Hydrogen Time of Treatment.
minutes minutes minutes minutes minutes minutes Our invention consists
in partially or completely removing excess of added solid deoxidising
agents such as calcium by heating the copper to a temperature above
its melting-point and then passing through the melt a gas which is
substantially inert thereto.
According to the time and temperature of the treatment, the degree of
agitation, the rate of gas flow, and the gas used, our invention may
be used for the removal of a part, as well as substantially all, of
the residual solid deoxidising agents. The degree of removal can be
determined by analysis of a sample taken from the melt.
The following example illustrates the use of our process to remove
calcium from copper containing small amounts of calcium .
EXAMPLE.
A number of samples of copper containing definite amounts of calcium
were melted and various gases passed through these melts for periods
of five and thirty minutes each. The melts were analyzed for calcium
before and after the gas treatment periods. Nitrogen , hydrogen and
ammonia were used, iand were passed at from 1 to 10 litres a minute
through the melt. The results were as follows: percent Calcium at
Start.
0.35 0.21 0.17 0.20 0.21 0.12 percent Calcium at Finish.
0.21 0.008 0.005 0.004 0.012 0.0025 The process may be carried out by
blowinjg or otherwise forcing the unheated gas through the heated
molten metal . The gas may also be preheated. The gas alone may serve
to agitate, or mechanical agitation may be employed.
While our process has been particularly described with regard to
removing calcium from copper it is also applicable to removing other
alkaline earth metals , viz. barium , strontium and magnesium , from
copper .
[Price 1J-] rA:G fv -cs.
Having now particularly described land ascertained the nature of our
said invention and in what manner the same is to be performed, we
declare that what we
Claims
_________________________________________________________________
claim is:1. A method of obtaining 6opper of high conductivity standard which
comprises partially or completely removing excess of added solid
deoxidising agents such as calcium by heating the copper to a
temperature above its melting-point and then passing through the melt
a gas 4 401.,008 401,008. w11ich is substantially inert thereto.
2. A method as clraimeLdl -iif ilaiinv I- in which the inert gas is
hydrogen , nitrogen or atnmonih.
3. A method of obtaining copper of high conductivity standard,
'substantiilly as liereinbefore described, with referenc-e to the
Example -Dated the. 9th -day of May, 1982. E.- 0. G.. CLARKE, Imperial
Chemical House, Mill-bank, London, S[[W]] 1. Solicitor for thie
Applicants. -Redhill: Printed for Iflis Majetty'gs tatioueiy Offire,
by Loves and Malcomason, Ltd.-1933.
? ?
Display vertical position markers.<br/><br/>This option will display
the relative positions of currently selected key terms within the full
document length.<br/><br/>You can then click the markers to jump to
general locations within the document, or to specific discoveries if
you know whereabouts in the document they occur. [27][_]
Open a preview window.<br/><br/>This window will provide a preview of
any discover (or vertical marker) when you mouse over it.<br/><br/>The
preview window is draggable so you may place it wherever you like on
the page. [28][_]
Discovery Preview
(Mouse over discovery items)
[textmine.svg] textmine Discovery
« Previous
Multiple Definitions ()
Next »
Enlarge Image (BUTTON) ChemSpider (BUTTON) PubChem (BUTTON) Close
TextMine: Publication Composition
GB401008
(BUTTON) Print/ Download (BUTTON) Close
Документ
Категория
Без категории
Просмотров
8
Размер файла
59 Кб
Теги
gb401008
1/--страниц
Пожаловаться на содержимое документа