US1522560A - Bleaching solution containing bromine compounds - Google Patents

Description

F8986 KR liAllUN Ul' Ill/\IILLO UL I mum To all whom it may concern:

and the like.

'advantagp to bleach and efiace atented Jan. 13, 1925.

ass Reference PATENT" ()FFHCE.

HARRY M. WEBER, or mon'rcra n, NEW JERSEY, ASSIGNOR re JOHN D. CARDINELL,

' or mon'rcmm' NEW JERSEY.

rnnaonrne sonu'rron con-mime nno'mzmn communes.

No Drawing.

Be it known that I, HARRY M. WEBER, a citizen of the United States, and a resident of Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Bleaching Solutions Containing Bromine Compounds, of which the following is a specification.

This invention relates to a bleaching solution prepared by incorporating phosphates and bromine compounds and to the process of making same and in the preferred form relates especially to the bromination of phosphates such as trisodium phosphate or to the treatment of phosphates with or without borates with bromine in the presence ,of an alkaline medium. In this manner a bleaching solution is obtained which is adapted for various bleaching operations such as whitening textiles, discharging colors, removing fruit stains and ink stains The solution ma be used to andwriting in ordin ryink.

For many years corporating bromine with alkaline phosphates for exam le note Watts Dictlonary. of Chemistry, v0 ume 1, page 537, published in 1888, where the statement appears that by the action of alkalies, alkali carbonates or phosphates on bromine water yellow strongl bleaching liquids are produced. These liquids are very unstable decomposing in the air, quickly at 30. In the present invention I do not lay claim broadly to bleaching compositions of this general character, my invention being concerned with the preparation of a fairly dilute ,solution by treating for example trisodium phosphate in predetermined proportions. Another feature of the invention is the avoidance of the presence of im urities which would tend to .afi'ect the stability of such bleaching compositions. As noted in Watts Dictionary these bromine solutions are atbest relatively unstable. It is recommended therefore that pure materials be emit has been known that bleaching solutions could be produced by in- Application tiled December 21, 1923. Serial No. ss2fo94.

of this material for domestic and ofiice purposes in removing stains, handwriting in ink and the like there must be provided a solution having reasonablygood keeping qualities. The avoidance or elimination of any impurities acting catalytically ii the manner indicated is therefore-recommended.

A composition prepared in accordance with the present invention is made by dissolving 6 (per centof trisodium phosphate in water an reacting on this solution 4th of 1 per cent of bromine.

Various modifications may be effected which depart to a greater or lessextent from the foregoing formula. In eneral I prefer to keep the total solids be ow .6101 8 per cent in order that when treatin for example paper having ink blots orandwriting in ink which is to be removed it will not on drying show a saline deposit which becomes yellow or otherwise discolored in the course of time.

However it is possible to add an alkali such as caustic soda or sodium carbonate or bicarbonate to the trisodium phosphate and add bromine to this solution. The

bromine should be" added preferably only with to the point of neutrality or at 'mosta very i faint degree of alkanlinity. If too strongly alkaline paper will be affected by the solution, and if on the other hand an acid reaction is shown 'the paper or fabric is likely to beinjured. Such acid solutions also are liable to have a disagreeable odor. In any event I prefer not to have more than 10 or 12 per cent of total solids in the solution.

, The corresponding bleaching compositions may be made from potash salts in-' eluding potassium carbonate and bicarbonate andthe various potassium phosphates. Itmay be noted'b'esides the orthophosphate the'pyro and metaphosphate's may be used in some cases. 7

What I claim is:-

1. A bleachingsolution adapted for the removal of stains, handwriting in ink andthe like which comprises ,brominated tri:

sodium phos hate in aqueous solution.

2. A bleac ing solution adapted for the removal of stains, handwriting in ink and the like which comprises brominated trisodium phosphate in dilute aqueous solution.

3. The process of making a bleaching solution adapted for the removal of stains,

handwriting in ink and the like which comprises reacting on an aqueous solution containing about six per cent of trisodium phosphate with approximately one per cent of bromine.

4:. The process of making a bleaching solution' adapted for the removal of stains, handwritin in ink and the like which comprises treating pure trisodium phosphate in' distilled water with pure bromine whereby catalysts affecting the stability of the solution are avoided.

5. As a st ain remover and ink eradicator brominated alkaline phosphate in aqueous Iiollution free from catalysts causing insta- 15 In testimony, that I claim the invention set forth above I have hereunto set my hand this 20th day of December, 1923.

HARRY M. WEBER.

Witnesses:

J. D. CARDINELL,' ARTHUR SCHRODER.