CS261429B1 - Bactericidal agent - Google Patents

Abstract

Use of mother liquors from the nitrolysis of hexamethylenetetramine as a means with bactericidal activity. The solution can be used in the protection of materials containing permanent or transient water, e.g. cutting fluids, adhesives, latexes, rinse aids, etc.

Description

261429

The present invention relates to a novel use of mother liquors from nitroso cleavage of hexaphylethylenetetramine (HMT).

The nitrosation cleavage of HMT to cyclic nitrosoamines from the technical-economical halide is most preferably accomplished by the acidification of the acid and nitrite. Nitro-lysis conditions, especially the qualitative selection of feedstocks, affect the yield and composition of fat liquors.

The mother liquors are aqueous solutions of inorganic nitrates containing a number of starting nitrite, formaldehyde, ammonium ions, R-sol, small amounts of formic acid, and the like. formates and other organic compounds. When nitrosolyzed aqueous HMT solutions are obtained by concentrating the amount of N-Manich bases clogged with the reactant mixture, they are structurally corresponding to the sugar. According to the preparation of these HMT solutions, dimethylamine, trimethylamine and polyols (Cs to C7) are introduced into nitrosolysis.

Nitrosolysis may be terminated by neutralizing the entire nitrolysis mixture with an alkaline reactant. In this case, the masterbatches contain a certain excess of neutralizing agent, which may adversely affect product quality and process economy. The application of alkali metal hydroxides will increase the temperature of the dosing mixture in a salocal manner, resulting in destruction of 1,5-metano-3,7-dinitroso-1,3,5,7-tetra-aza-cyclooctane (DNPT), and thus, it is a potential source of yield reduction.

Alkaline hydroxide, as well as formaldehyde occluded in crystals of cyclic nitrosamine, respectively. adsorbed on its surface in industrial conditions can not be removed, leading to a reduction in its stability. These shortcomings in the stability of stability are solved by the use of ammonia and alkali-reacting salts of carbonates. The ammoniacalization of the entire nitrosolysis mixture is only meaningful if the absorbing mother liquors are recycled as the solvent of the raw materials. A more preferred method of ending nitrosolysis of HMT is the isolation of nitroso amines from the acidic reaction mixture followed by neutralization, only the filter cake.

The solution regarding the isolation of some constituents from mother liquors, such as nitrous sodium, formaldehyde, formaldehyde and urea-formaldehyde resins (Cs. Author, certificate no. 196 707, 206 276, 214 605, 234 447) is not used and the liquors are not useful. released into the environment.

This problem is solved by the present invention, wherein mother liquors from nitrosolysis of hexamethylenetetramine are used as agents with bacterial activity.

The advancement of the invention is manifested by technical effects, in particular by eliminating the problems of cleaning defects.

The economic progress of the solution is manifested by a reduction in the cost of imports, respectively. production of bactericidal agents. From the social fortification, the improvement of hygiene conditions from the uncontrolled contamination of the living environment is wasted.

The composition of the mother liquors from the production of DNPT, starting from HMT, sodium nitrite and nitric acid, ranges from: HMT: 6.5 + 4.0 kg. m-3 = 0.58 + 0.36% free formaldehyde: 10.8 ± 5.7 kg. m-3 = 0.97 + 0.51% sodium nitrate: 130.0 ± 40.0 kg. m-3 = 11.71 + 3.60% sodium nitrite: 16.0, + 8.0 kg. ni '3 = 1.41 + 0.72% TMTA: 1.0 + 0.5 kg. m-3 = 0.09 + 0.04% DNPT: max. 0.5 kg. m "3 = max. 0.045% formates, polyols (C4-C7): max. 1.5 kg. m-3 = max. 0.14%

The mother liquors from nitrosolysis of HMT can be used to protect gray liquids. They are suitable as an additive to materials containing permanent or transient water, eg adhesives, latexes, flushing agents, etc. Raw materials can be used for the respective purpose. modified. For the preparation of effective liquids in distilled and demineralized water, it is also possible to use water strands because salts do not reduce the effect. Although water is preferably used as solvent, other diluents, such as dilute solutions of acids, bases, amines, surfactants, alcohols, regp. solvent mixture. The effect of the mother liquors from nitrosolysis of the HMT in the sense of the invention is documented by the following example, which does not in any case exclude the possibility of variability in the use or the use of. using the principle of the essence of the invention. EXAMPLE A mother liquor from nitrosolysis of HMT is available, which results in DNPT with a content of ca 5 ° / oTMTA, without treatment (sample No. 1) and after treatment with solutions of NaCl from the production of cyclohexane (sample no. 2). The composition of the samples is shown in Table 1.

Claims (2)

OBJECT OF THE INVENTION Use of mother liquors with bactericidal activity. nitrosolysis of hexamethylenetetramine as a composition