US268461A

US268461A - Compound for the prevention and removal of scale in steam-boilers

Info

Publication number: US268461A
Authority: US
Publication date: 1882-12-05
Anticipated expiration: 1899-12-05

Description

I GEORGE E. NORRIS,

of San Francisco,

Nrru STATES CHARLES GRYER AND GEORGE H. NORRIS, OF SAN FRANCISCO, CALIFORNIA.

COMPOUND FOR THE PREVENTION AND REMOVAL OF SCALE IN STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 268,461, dated December 5, 1882.

Application filed June 23, 18852. (No specimens.) I

To all whom it may concern:

Be it known that we, CHARLES GRYER and of the cit-y and county State of California, have invented an Improved (Jompound for Removal and Prevention of Scale in Steam-Boilers; and we hereby declare the following to be a full, clear, and exact description thereof.

Our invention relates to a compound for the removal and prevention of scale in steamboilers; and it consists in a preparation of prepared leather scraps with caustic or hydrate of soda, the leather scraps first being-submitted to a preliminary treatment by which they are freed of all such extraneous matter as grease and oil.

In February, 1875, a patent was issued to J. H. Pitts for a compound of leather scraps, caustic soda, gelatine, and water, the leather being first boiled in the soda until dissolved, and the gelatine dissolved in the water and afterward added. We have found this compound almost entirely useless, because the soda liberates from the leather the oil, grease, &c., with which it has been originally dressed, and forms with it a saponaceous compound, which causes the water in a boiler to foam, so as to greatly interfere with or stop its proper action. v

Our invention contemplates the preliminary treatment of leather scraps with naphtha, or

other volatile oil or substance, by which all the oil and grease is removed from the leather, then drying it to remove all the volatile oil, and lastly, boiling the leather scraps in caustic soda until dissolved, and the addition of a sufficient quantity of Water.

In carrying out our invention, we take the required quantity ot'leather scraps to make the proper proportion of the compound and steep them in naphtha, or other suitable hydrocarbon, or volatile oil or substancenvhich will thor-.

the liquid and spread in a suitable place to dry. After the leather scraps are dry or freed from the volatile oil they are placed in a solution of caustic soda or hydrate of soda and boiled until dissolved. Various proportions of the substance named may be used; but we have found that one pound of the prepared leather scraps to two ounces of hydrate or caustic soda and one gallon of water will produce a compound which gives very satislactory results.

In some cases tan-bark is treated by boiling with hydrate or caustic soda and the resulting liquid added to the compound; but this is not absolutelynecessary, although for some purposes it improves the compound.

Having thus described our invention, we do not claimbroadly a compound formed by boiling together ordinary leather scraps, caustic soda. gelatine, and water; but

What we do claim as new, and desire to se cure by Letters Patent, is-

The process of making an incrus' ation-preventive,which consists in first steeping leather or leather scraps in naphtha or other hydrocarbon or volatile oil to remove grease or oil, then boiling the leather scraps thus prepared with hydrate or CktllSlJlG soda and water, substantially as and for the purpose described.

In witness whereof We hereunto set our hands.

CHARLES ORYER. GEO. H. NORRIS. NVitnesses:

THos. H. HOLT, WILLIAM L. Hmcuvs.