CH100153A - Process for the production of a washing and bleaching agent. - Google Patents

Description

  

  Process for the production of a washing and bleaching agent. According to the invention, an excellent washing and bleaching agent is obtained by bringing water glass, sodium superoxide and alkali bicarbonate into reaction. For example, one can proceed in such a way that sodium superoxide and sodium bicarbonate are allowed to act on one another in approximately equivalent amounts in a water glass solution. Depending on the amount of water glass solution, the content of active oxygen in the product can be largely varied.



  Furthermore, the active oxygen content of the product can be increased by adding hydrogen peroxide at any stage of the process, for example before, during or after the addition of sodium peroxide to the water glass solution.



  The shelf life of the resulting products, which in itself is quite a long one, can be increased even further by adding protective substances. As such 'have, inter alia, alkaline earth silicates such. B. magnesium silicate and calcium silicate or mixtures of several silicates proven. Such protective substances can be produced for example in the mixture itself or the same; produce outside the mixture, e.g.

   B. by mixing allealisilicate with a magnesium or calcium salt. The product can then be introduced into the process, for example in the form of a suspension. The protective substances are expediently added to the waterglass solution.



  When working under suitable conditions, the reaction mass hardens automatically after a short time, with the formation of a directly usable detergent. Drying can increase the shelf life of the product even further.



  The properties of the product can also be modified in various directions by adding other substances, in particular the product can be adjusted to a certain desired content of active oxygen by adding soda. In carrying out the procedure, for example, one can proceed in such a way that in water glass in which Na20:

       Si02 are in a ratio of about 1: 3 and which, for example, represents a solution of <B> 30 '</B> B6, to which water can possibly be added, sodium superoxide enters and, after conversion of the same into sodium superoxide hydrate, a little more than add the theoretical amount of bicarbonate and then rub it in. After adding the bicarbonate, the previously thin mixture becomes thick at first, only to become thin again after a short time. This thin-bodied pulp then thickens again after a while and solidifies into a hard cake.

    The solid mass can, for example, be used without further ado after grinding. However, the product can: also be dried easily and without loss, which increases the shelf life.



  According to the invention, detergents and bleaching agents with excellent shelf life are obtained directly from the starting materials, i.e. without special preparation of intermediate products, which contain practically all of the active oxygen introduced and also all of the alkali of all raw materials used in valuable, for laundry and Contain bleaching usable form.



  <I> Example 1 </I> 425 parts by volume of water glass with a specific weight of 1.3 are mixed with 330 parts by volume of water. To this end, a suspension is added, which was created by mixing 175 parts by volume of 30% strength sodium silicate solution (Na.2SiO ;, -f- 9H.0) with a solution of the equivalent amount of magnesium chloride. Then who entered the 330 parts by weight of sodium superoxide at 10 to 15 ° C, which is followed by stirring for some time.

   Finally, 880 parts by weight of 91 percent sodium bicarbonate are added with good mixing and attrition. After drying the product obtained, 1570 parts by weight of detergent with 3.7 to 3.8% active oxygen are obtained.

    <I> Example 2: </I> 385 parts by volume of water glass solution with a specific weight of 1.3, which, as in Example 1, is mixed with a magnesium silicate suspension, are mixed with 400 parts of hydrogen peroxide of 10.4%, whereupon <B> 360 parts by weight of sodium peroxide and finally 920 parts by weight of 91% sodium carbonate are added in the manner described in Example 1. After drying, about <B> 1635 </B> parts by weight of the detergent are obtained with a content of about 5% active oxygen.



  If bicarbonate that is too coarse is used, the mass will only harden very slowly. It is therefore advisable to conduct preliminary tests to determine whether the bicarbonate to be processed has the correct degree of fineness.

 

Claims (1)

PATENT CLAIM: Process for the production of a washing and bleaching agent, characterized in that water glass, sodium superoxide and alkali bicarbonate are brought into reaction. SUBClaims: 1. Method according to claim, characterized in that hydrogen superoxide solution is added. 2. The method according to patent claim and Un teran claim 1, characterized in that 'one adds protective substances. 3. The method according to claim, characterized in that care is taken for the presence of an alkaline earth metal silicate. 4th Process according to claim, characterized in that care is taken to ensure the presence of a mixture of alkaline earth metal silicates. 5. The method according to claim, characterized in that the product is dried to increase the shelf life. 6. The method according to claim, characterized in that other substances are added. 7. The method according to claim and sub-claim 6, characterized in that soda is added.