Abstract The present discovery entails a new means for stabilizing mixtures, containing primarily sodium dithionite, from spontaneous decomposition and ''''ignition'''' by the action of water. Specifically, the invention comprises stabilization of sodium hydrosulfite against spontaneous decomposition in the presence of water, using effective quantities of additives, which still in no way lessen the bleaching activity that would be developed by an equivalent quantity of sodium hydrosulfite. The stabilizing agents consist of oxalic acid and a water soluble inorganic carbonate. This mixture can be further improved as to stabilization and bleaching effect by the addition of borax (Na2B4O7 1 10 H2 O). The bleaching effect may be improved by adding a water soluble inorganic sulfite.
The composition of matter of claim 1, and borax as a further additive.
Claim 2
Dependent Claim
16 words
The composition of matter of claim 2, and a water soluble inorganic sulfite as further additive.
Claim 3
Dependent Claim
32 words
The composition of matter of claim 1 wherein the inorganic carbonate is selected from the group consisting of sodium hydrogen carbonate and mixtures thereof and sodium carbonate as water soluble inorganic carbonates.
Claim 4
Dependent Claim
32 words
The composition of matter of claim 2 wherein the inorganic carbonate is selected from the group consisting of sodium hydrogen carbonate and mixtures thereof and sodium carbonate as water soluble inorganic carbonates.
Claim 5
Dependent Claim
32 words
The composition of matter of claim 3 wherein the inorganic carbonate is selected from the group consisting of sodium hydrogen carbonate and mixtures thereof and sodium carbonate as water soluble inorganic carbonates.
Claim 6
Dependent Claim
29 words
The composition of matter of claim 3 in which the water soluble inorganic sulfite is selected from the group consisting of sodium sulfite and sodium bisulfite and mixtures thereof.
Claim 7
Dependent Claim
29 words
The composition of matter of claim 4 in which the water soluble inorganic sulfite is selected from the group consisting of sodium sulfite and sodium bisulfite and mixtures thereof.
Claim 8
Dependent Claim
29 words
The composition of matter of claim 1 wherein the proportion of additives in percentage by weight to sodium hydrosulfite is: A. oxalic acid 1-25 percent; B. carbonate 1-3 percent.
Claim 9
Dependent Claim
24 words
The composition of matter of claim 9 wherein a further additive, borax, comprises in proportion by weight relative to the sodium hydrosulfite, 1-5 percent.
Claim 10
Dependent Claim
24 words
The composition of matter of claim 9 wherein a further additive of sulfites comprises in proportion by weight relative to the hydrosulfite 0.5-1 percent.