US683562A - Process of preparing calcium carbid. - Google Patents

Description

- of Calcic and other Carbids, (for which I have ceptacles.

S such substances as a mixture of petroleum, glucose, and carbonate of lime, a mixture of (.nsTER, a subjectof the Queen of Great Brit- .ofi acetylene gas, which defect renders it UNITED STATES Y EDXVAR-D \VILLIAL\[ LANCASTER,

OF VES'lMINSIER, ENGLAND.

PROCESS OF PREPARING CALCIUM CARBID.

SPECIFICATION forming part of Letters Patent No. ($3,562, dated October 1, 1901.

Application filed October 8, 1900. $eria1No 32,399- (No specimens.)

To all whom, it may concern Be it known that I, EDWARD WILLIAM LAN- ain, residing at flS-Victoria street, Westminster, England, have invented certain new .and useful Improvements in the Preparation applied for Letters Patent in Great Britain, such application being numbered 9,334and bearing date May. 21, A. D. 1900,) of which the following. is a specification.

As is well known, calcic and other car-bids when, exposed to the air absorb moisture therefrom and become decomposed, giving necessary to protect such carbids from the atmosphere by storing them in air-tight re The attempts hitherto made to prevent the decomposition of earbids have been in the direction of coating the lumps of carbid with paraffin-wax,cocoa-butter, and sugar, and other substances which will form an impervious coating on the outside of the carbid. These coatings have the disadvantage that it may be necessary, to break the lumps of' carbid before placing them in the generator in order to allow free access of water-to the carbid. 5

The object of this 'invention is to obviate the defects incidental to ordinary carbids and carbids treated as above described by treating' calcic and other carbids with certain substances which will protect them from the action of atmospheric moisture and also retard the decomposition of the carbide when immersed in water and prevent too-rapid generation of acetylene gas.

' Now according to this invention I saturate or partly saturate the carbid with creosote, either plain-or diluted,with crude'pctroleu m, kerosen or othcrsuitable hydrocarbon or othenliq-uid which will not decompose the carbid. It the carbid has to be stored for any considerable length of time, I immerse lumps of carbid in a bath of commercial cre osote, to which may be added a little petrole um or kerosene or other suitable hydrocan time only, the creosote may be largely diluted with petroleum, kerosene,orother suitable,

liquid which will not decompose the carbid,the effect of using diluted creosote being to render it unnecessary to neutralize the effect of the creosote before using the carbidj When using diluted creosote, I may proceed in either of two ways. I may immerse-lumps of carbid in a bath of petroleum, kerosene, or other suitable hydrocarbon and when the carbid is sufficiently saturated'I remove-it from the bath and immerse it in a bath of creosote,to which may be added a little petroleum or kerosene. The carbid after its removal from the creosote-bath may be exposed to the air for some time without decompositionand consequent evolution of acetylene gas, and when immersed in water the treated carbid is decomposed much more slowly than carbid which has not undergone the above treatment,- or I may use one bath only'in which the carbid is immersed, the said bath consisting of commercial creosote, one part, and petroleum or kerosene four parts.

What I claim as new, and desire to secure by Lette s la'ent, is

1. Js new article of manufacture a prepart d can bid consisting of calcic or other carbid saturatoil or partly saturated with creosote for the purpose stated.

2. As a new article of manufacture a pre