The salt derivatives of caprolactam as modifiers of clay

 

(57) Abstract:

Salt used when obtaining the modified layered silicate in the production of paints, coating of enamel, plaster, household paints, ceramic industry for obtaining anhydrous molding compounds, as active fillers in polymers and rubbers, for lubricating and cooling fluids, drilling fluids oil-based. It is proposed to use salt caprolactam derivatives of General formula

< / BR>
where n = 1oC5;

X-anion of a mineral acid (Cl-NO-3,HSO-4)

as modifiers of clay. Achieved the expansion of raw materials to receipt of organogels and improvement of their hydrophobic properties. table 1.

The invention relates to the production of modified layered silicates and can be used in the manufacture of paints, coating of enamel, plaster, household paints, ceramic industry for obtaining anhydrous molding compounds, as active fillers in polymers and rubbers, for lubricating and cooling fluids, drilling fluids oil-based.

As modifiers that improve the oleophilic Svistunova as a modifier of the clay (ed.mon. USSR N 757497, class C 04 B 33/04, 1980) salts of the General formula

< / BR>
where R is a hydrocarbon radical with the number of carbon atoms of 5 to 50;

n is 1 to 5;

X is the anion of an acid,

which are saltlike interaction products polyisobutylene anhydride with polyethylenepolyamine.

The drawbacks of such modifiers clays are their high cost, scarcity of raw materials, the complexity of synthesis and low hydrophobic properties of clays based on them.

The invention is aimed at expanding the resource base to produce organogen, reducing their costs, improving their hydrophobic properties, recycling industrial waste, used as a modifier of the clay.

This is achieved by using as a modifier of the clay products of acid waste treatment production of caprolactam, and it still bottoms from the distillation of the caprolactam (CODC), the General formula

< / BR>
where n = 1 to 5;

X is the anion of a mineral acid

as modifiers of clay.

COCK are a mixture of oligomers of caprolactam with a molecular mass of 200 - 800.E. The average composition of the polymer, wt.%:

Caprolactam - 10 - 15

Oligomer - 85 - 90

Under normal conditions the/SUP>C, color buff.

When interacting COCK with mineral acid (H2SO4, HCl, HNO3they become sustainable homogeneous dense mediobrunneus mass, capable of a long time not to crystallize, with density 1325 -1357 kg/m3and the electrical conductivity (1,5 - 3,2)10-31/OSM.

When the processing of clay these modifiers is obtained a modified clay which exhibits hydrophobic properties: clay goes into a diesel oil after stirring in a mixture of oil - water, the amount of wetting on the surface of this clay is 0,61<cos <-0,57; the swelling properties of the clay in a mixture of toluene (90%) - methanol (10%) above the known similar (see table).

The mechanism of interaction of modified CODC with the surface of the clay can be represented as follows.

Molecules COCK adsorption forces of interaction involved in the interlayer space of layered silicates, such as clays, for example, montmorillonite group. Fixies on the surface of clay particles (clay plates), they prevent the adsorption of water molecules, and displace it from the interlayer space. As a result of these processes, the clay loses its inherent is a basis of sustainable organspende.

Upon contact of the treated clay modified COCK with diesel oil is the Association of hydrocarbon chains and dramatically increases the swelling properties of the clay. Filtration analysis showed that the filtration rate of suspensions with the modified clay is increased three times in comparison with similar (see table). A high degree of water loss has a significant positive value to create compositions bystrovytsia ceramics for the production of sanitary products, pottery, ceramics radio.

Filtration analysis was performed using a Buchner funnel under vacuum (1 kg/cm2), on the basis of these data determined the degree of water loss (see table).

Thus, the resulting chemical structure which is a modification of known chemical compounds.

The absence in the patent and scientific literature on this and related fields of technology the same or similar to the technical nature of the solution makes the invention satisfies the criterion of "novelty". The study of other known technical solutions in this field of technology features that distinguish the claimed invention from the prototype is matelski level."

Example 1. In a three-neck flask equipped with stirrer, reflux condenser, dropping funnel and thermometer, was loaded 100 century. including COCK warmed up to melt temperature and was added dropwise with stirring for 0.5 hours 73 ml of concentrated sulfuric acid, and then the temperature was raised to 110oC and led the process, maintaining a pressure of 600 - 620 mm RT.article The process ends when obtaining a homogeneous dense mediabase mass.

Example 2. For modification used Veselovsky clay (sanitary products). In a flask equipped with stirrer, thermometer and reflux condenser, was placed 40 century. including the product obtained in example 1, and under stirring and heated to 100oC was made, for example, 80 century, including clay (because the amount of clay does not affect the objective and results), was stirred for one hour at t = 100oC, after which the clay was filtered off, washed on filter with the precipitate with water. The precipitate was dried at 105oC (to constant weight).

Hydrophobic properties of the samples of clays characterized by the following indicators: the swelling properties in organic solvents, the amount of wetting (COS ) water surface obtained clay, the degree of water loss (filter).

As can be seen from the table, clay modified with the proposed modifier, its properties are not inferior to foreign analogue - Benton 18oC.

Because the modifier is obtained from the solid waste production of caprolactam, the cost is significantly lower than purchased abroad. Production modifier on the basis of mineral acids is much simpler and does not require scarce, expensive components, and clay, obtained after processing, has a high degree of hydrophobicity -0,61 < COS < -0,57 that corresponds to the purpose of the invention.

The proposed modifier allows you to expand the raw material base, to abandon the fat of the raw materials to get cheap domestic product with hydrophobic properties, is not inferior to the best foreign analogues.

Salt caprolactam derivatives of General formula

< / BR>
where n = 1 to 5;

X-anion of a mineral acid (Cl-NO-3, HSO-4)

as modifiers of clay.

 

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