SU963972A1 - Batch for making porous material - Google Patents

Description

When the content of polyvinyl alcohol is less than 0.20 wt.%, The mass does not have sufficiently good molding properties. With its content of more than 0.40 wt.% Raw has a low strength.

Waste of metallized glass fiber in the form of strands is treated with 10% sodium silicate solution during the day. They are then dried at 120-14 ° C. After this treatment, the waste becomes brittle and is easily milled in a ball mill until a powder with a residue on a 005 sieve is 29-30%. /

Using a 2% solution of polyvinyl alcohol as a binder (in the amount of 11.5-15% by weight of glass powders), the composition is molded into a product {at a pressing pressure of 100 kg / cm2, with a diameter of 10, -, 25; 50/100 mm. The molded specimens are dried and then calcined for 1 hour.

When forming porous granules, the amount of a 2% polyvinyl alcohol solution is 25%. This amount of polyvinyl alcohol in the blend. Provides raw material with sufficient strength.

The composition of the mixture for the manufacture of porous materials are given in Table 1.

The compositions of glass powders from waste metallized fiberglass are given in table. 2

Properties of porous materials are given in table. 3

The chemical stability of porous materials is given in Table. four.

Porous material obtained from the proposed mixture, has a uniformly porous structure with a predominant pore size of 30-40 microns.

Thus, from the proposed blend, it is possible to obtain monolithic porous materials with high strength, uniform porous structure, and a combination of properties that determine their use as filter materials in weakly alkaline and neutral media, aeration materials.

From the same charge, it is possible to obtain granular porous materials that can be used as catalysts carriers. Porous materials were tested as carriers of heterogeneous catalysis catalysts during the decomposition of hydrogen peroxide on transition metal complexes. They keep catalysts well and work long-term.

Table 1

12

90.73

93.2

92.23

Pellet mass

0.2

0.28

0.40

table 2

14.47

3.15

0.25

0.42

15.18

Continued table. g

14.05

3.30

0.25

0.42

13.32

Table 3

79639728

Claims (1)

The invention claims glass powder 90,73-93,2 The mixture for the manufacture of porous Liquid glass material, including glass powder (in terms of liquid glass, characterized by a dry substance of 6.52-9.07 with the fact that, with 1 (Polyvinyl alcohol strength, it contains as 5 glass powder production waste dry matter) 0,20-0,40 metallized fiberglass of the following composition, May.%: SiOg 44.90- Sources of information, 9; 25rcao lo5: i5: 26; M) T | 5-s 82; These are taken into account in the examination of Fy 0,25-0,26; 0.42-0.44; AI1. USSR author's certificate 12.84-15.18 and additionally a poly-72556, cl, C 04 B 21/06, 1948. nil alcohol with the following ratio of 2 Swiss Patent No. 510592, the components, wt.%: CL. C 03 C 11/00, 1971 prototype