US1162210A - Chromium compound. - Google Patents

Description

WILLIAM BROKERS AND ISAAC DREYFUS, OF BROOKLYN, NEW YORK, ASSIGNORS TO W. BECKERS ANILINE AND CHEMICAL WORKS, 0F BROOKLYN, NEW YORK.

CHROMIUM COMPOUND.

No Drawing.

To all whom it may concern:

Be 1t known that we, YVILLIAM BEoKnas and Isaac Duurrus, both citizens of the United States, and residents of the borough of Brooklyn, in the county of Kings, city and State of New York, have invented certain new and useful Improvements in Chromium Compounds, of which the following is a specification.

The object of our invention is a method for the production of new, novel and useful chromium compounds the aqueous solutions of which are not precipitatable by means of alkalis or mordant colors and for the products produced thereby. Whereas, chromium compounds may be easily precipitated from their aqueous solutions by means of alkalis or mordant colors, we have found that it is possibleto produce a chromium compound under such circumstances and conditions that the chromium compound contained therein is not precipitated froin its aqueous solution by the alkalis or mordant colors. The Solutions thus produced remain perfectly clear and unprecipitated even when boiled with alkali hydrates or with the mordant colors and possess mordanting properties in dyeing: of great conunercial value.

if a solution of a neutral chromate compound of an alkali-metal be added to glurose and heated until no chromic acid canbe detected by means of an acidulate-d potassium. iodid solution, theresulting product is a solution of a chromium compound in such physical and chemical condition that no precipitate formed upon the addition of alkalis such sodium. carbonate, potassium carbonate, sodiur hydrate, potassium hydrate, etc, or upon the addition of mordant colors such alizarin, lor wood, etc. While the exact composition these solutions has not been definitely determined, it would seem that the chromium compounds are present in a. colloidal. form preventing. their precipitation. This solution has the property of forming chromium lakes of the mordant colors which are completely soluble in the solution and which do not precipitate upon.

Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed March 24, 1914. Serial No. 826,944.

' dyestuffs their commercial value in the dyeing industry.

Successful dyeing of textile fibers with the mordant colors presents many dillicuhties and requires great care and the observance of cautions in the application of the dyeing methods employed. The usual methods of dyeing with these colors is to first mordant' the fiber with a chromium compound and then subject it to a solution of the dyestuff, or to reverse the operation and treat' the fiber first with the dyestulf and then with the chromium mordant. This requires a number of steps in the 'dyeing ope-ration and it is evident that unless the" fiber is thoroughly penetrated with each solution and the excess liquor carefully re-- moved from the fiber after each step, the re sulting dyeings will be unsatisfactory. It will thus be seen that on accountof the insoluble-lake-forming properties of these colors, they are liable to accumulate upon thp surface of the fiber, causing uneven dyeings, n0n-penetration, and results which crock and are not fast towashing, scouring and the other ordinary operations to which such goods are subjected.

It is evident that if a perfectly clear solution of the chromium compound, or a perfectly clear solution ofthe chromium com- .pound and the dyestulf can be formed and the textile fiber be thoroughly saturated or penetrated with this solution and the insoluble lake be produced within the fiber after its penetration by this solution, the resulting dyeings will be more uniform and more thoroughly incorporated throughout the fiber, and that they will not have a tendency to creek and will be faster to the various operations to which the goods are subjected. We have found that the solutions formed by our new method have these properties and hence possess great value for the dyeing of textile fibers. The following example represents one method of following our invention: dissolve .108 pounds of glucose in 216 pounds Waterand gradually add pounds neutral chromate of sodium with constant stirring-maintaining a temperature of 80 degrees to 90 degrees C. Heat until the presence of chromic acid cannot be detected by an acidulated solution as for instance upon a water-bath, there results a dry brittle product, which when dissolved in water possesses all of the properties described herein for the solution before evaporation.

\Ve do not limit ourselves to the particular ingredients, the quantities, times or tempera tures mentioned. above, nor to the particular order of the incorporation of the ingredients. all oi. which may be varied without going beyond the scope of our invention as described and claimed.

lVhat is claimed, is:

1. The process of. treating; glucose and neutral chromium compounds comprising beating them together in solution. thereby producing a solution of a chromium compound not necipitatable by allralis or mordant colors.

2. The process of treating glucose and neutral chromates of allnili-metals comprising beating: them together in solution. thereby piwalucinn a solution of a chromium compound not prccipitatable by alliali's or mordant colors and maporatingr tov dryness.

The process of treating glucose and neutral chromate or soda comprising heating them together in solution, thereby produc ing a solution of a chromium compound not 6. As a new article of manufacture. a.

chromium compound producible by treatinn glucose and a neutral chron'iatc of soda from the aqueous solution of which the produced chromium compound is not precipitatable by allialis or mordant colors.

7. A dry brittle product producible by adding av neutral chromate oi. an alkalimetal to a solution of glucose, heatin and evaporating to dryness. from the acmcous solution of which the produced clirou'iium compound is not prccipitatable by alltalis or mordant colors.

S. A. dry brittle product producible by adding neutral chromate of soda to a solo (ion oi glucose. liating' and evaporating to dryness. from the aqucmis solution of which the produced chromium compound is not precipitatable l alkalis or inordant colors.

Signed at the borough of Brooklyn. in the county of Kings. city and State of New York, this 21st day of lrlarch. 1.91%.

v VILLIAM BECI'CERS.

ISAAC D HQYF U Witnesses -S. R. DAVID,

l. K01: FIEYE.