SU51173A1 - The method of preparation of the bisulfite compound cerulene - Google Patents

Description

Upon reaction of the sulfurified with an excess of an aqueous solution of sodium bisulfite, a water-soluble bisulfite compound of the composition is formed;

C20 Nude About 2 NaHSOs

This compound is a brown powder, soluble in water with a yellow color. When it is treated with acid asitol, its splitting is observed: oiie with abundant evolution of sulfur dioxide.

The reaction of formation of the bisulfate compound of ceruleia is blood-borne by the knob-nano processes, the nature of which has not yet been clarified, and poses great difficulties for its production. This circumstance is caused by the extensive research of researchers, the results of which are reflected in proposals that are not pending at the present time.

Already earlier (ed. Mon. Lg 21281), the beneficial effect of weakly alkaline agents was noted, on the reaction of the formation of the bisulfite and derivative, cerulene. The average of such alkaline agents is particularly favorable for boilers of pieloxy metals.

The authors of the present invention have found that during the processing of ceruleium borates, a complex compound is formed which has the ability to react with one molecule of alkali metal bisulfite to form a bisulfite compound. An excess of bisulfite destroys comilex with its transfer to the already cured sulfur compound.

The bpsulfite derivative of the complex of cerule 1a with one bisulfite molecule is dissolved in water with violet-blue staining and decomposes without liberated sulfur dioxide and treated with mineral acids.

This new compound compares favorably with the previously known best color effect.

Example I. 13.8 g of a 25 "/ oh neutral cortex of the ceruleia is treated at room temperature with 0.66 g of 100 ° / oh of the metaboric acid common salt. After stirring for 20-30 minutes, 2.7 g of 40 / o-sodium sulphate sodium is charged to the reaction mixture and stirring is continued for another 30 minutes. After that, a lash of the finished product can be used for printing in vdeo, or dried in vacuum nln at ordinary pressure of nrn temperature 45-50.

The dry product is placed on the dextrin type.

Example 2. 13.8 g of a 25 / o-ff neutral nasta are treated with a boiling solution of 0.62 g of boric acid in 2 cm of water.

Mixing thoroughly, allow the mixture to cool to 30. With this temperature, 2.52 g of sodium sulfite or its equivalent anhydrous salt is quickly charged. After stirring for 30-60 minutes, the product is dried, as indicated in the previous example, or used as a paste.

Example 3. 13.8 g of an infusion of ceruleip containing 1–1.5% of sulfuric acid are treated in order to neutralize the mineral acid with 0.15–0.22 g of soda and then proceed as described above.

Example 4. 13.8 g of 25 / o-th neutral nasta of cerulein is treated with a hot aqueous solution of 0.66 g of boric acid and 0.6 g of calcipirova soda in 2 cm of water. After the Z0-M1 interval mixing, 2.6 g of 40 / o-sodium bisulfite was added to the reaction mass and allowed to stand for 30 minutes and then proceed as described above.

The subject invented ibf.

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Modifying the method of radiation and bisulfite compounds 5Ul5 || According to the author's testimony, jTs 2Š81, characterized in that the aqueous nastusrulein is treated successively by equivalent to it, with the quality of 1) solution T5 {Ti; | {th: oh-acid (or its salts) or Stov4L "solution of boric acid and soda IgT) sulphite rytvorov or bisulfio in alkali metals, selecting these reagents in such a way as to obtain a mixture of alkali metal bisulfite.