DE482998C - Manufacture of bodies containing alkaline carbonate - Google Patents

Description

Manufacture of bodies containing alkali percarbonate According to the previous life-cycle invention succeeds in producing percarbonatrekhe, firm and durable bodies in that alkali peroxide hydrate is reacted with bicarbonate. One proceeds here: so that the alkali peroxide hydrate either as such or as concentrated as possible aqueous solution or suspension or suction-dry applies and reacted directly with solid bicarbonate. Solid and dry ones are obtained directly Products that can be further dried to remove crystal water, or a initially a liquid mass, which after a short time turns into a crystalline The cake solidifies, which can also be subjected to post-drying.

The method offers the advantage over other known methods, that one cannot produce hydrogen peroxide from the alkali peroxide with acid needs, whereby one devalues the alkali, but that the entire alkali in usable Form, either as percarbonate or as carbonate, is obtained. As a result of simplicity the conversion, the yield of active oxygen is very good.

By adding alkaline earth silicates or other protective substances one can increase the durability of the body obtained.

The method can be carried out, for example, as follows: _ i. 10 parts by weight of sodium peroxide hydrate, as it comes from the Nutsche, with a content of 6.36 percent active oxygen is in: a suitable mixing device mixed with 8 parts by weight of bicarbonate. After a short mixing:, heats up continuously the mixture is gentle and becomes wetter. You spread them out and leave them on cool in the air, resulting in a completely dry product that through further drying gets a higher oxygen content.

2. 100 parts of sodium peroxide are converted into 30 to 100 parts with cooling Water entered; the pulp is expediently mixed with 24 parts of carbonate mixed in a blender. The initially almost dry mass becomes thin and can be: n flat. Pour out containers to cool and solidify. That I The product, which was only slightly moist to the touch, was then dried further.

It is already known to have ingredients containing active oxygen to produce that one barium peroxide with NatriumbZcarbon.at in the presence Reacts of water, the solution freed from the precipitated B: arium carbonate and the sodium superoxide carbonate formed from the filtrate by precipitation with alcohol or careful concentration of the solvent wins. In contrast, one arrives according to the present invention directly to solid high-quality Alkalipercarban.at, _ containing Preparations.

Claims (1)

PATENT CLAIM: Process for the production of alkaline percarbonate-containing l4, 'bodies made of super- oxide hydrate and sodium: bicarbonate, characterized in that alkali peroxide and alkali bicarbonate are mixed dry or in the presence of so limited amounts of water that solid or liquid, but solidifying products are obtained after some time.