SU961949A1 - Antiseptic composition for wood - Google Patents

Description

(54) ANTISEPTIC FOR WOOD

one

The invention relates to wood processing, namely, to antiseptic wood from rotting, environmental protection through the use of industrial waste.

Known residues from the production of dimethyl terephthalate, which are industrial wastes 1.

Known wood preservative based on fluorine salts 2.

A disadvantage of known substances is the limited raw material base.

The purpose of the invention is to expand the range of available and effective wood preservatives and protect the environment.

This goal is achieved by using the bottoms from the production of dimethyl terephthalate as wood preservatives.

In the production of dimethyl terephthalate, the following wastes are obtained (the quantity is calculated per 1 ton of DMT),%

A resin consisting of a residue of the I stage of the distillation of the crude ether from the evaporation chamber of the composition

Methylparatoluylate (PT-ether) 0.5-1

Paraformalmethyl benzoate 1-4 Fractions of dimethyl terephthalate and dimethyl isophthalate (DMF) 8-10

Resin 85-90

The residue of stage II of the multi-purpose distillation of the composition:

Methyl Paratoluylate

10 (PT-ether) 1-4

Paraformalbenzo1-4

Fraction of dimethyl terephthalate and dimethyl isophthalate 10-20 Resin 75-80

15

The residue of the third stage of distillation of the filtrate of the DMI composition;

Methylparatoluylate (PT-ether) 1-5

Paraformylmethylbenzoate 10-25

20 Dimethylterephthalate10-20

Dimethylisophthalate 10-20

Resin 40-50

The bottoms are a mixture of all these wastes.

To determine the bioprotective effect, wood is impregnated by lowering the samples for 5 minutes into the bottoms of dimethyl terephthalate production heated to. 60 ° C. Samples are 1X1X9 cm. The average consumption of antiseptics per 1 m of wood is 148 g / m. Samples of 3-4 pieces are tested for the effect of the wood-destroying fungus “Kanyofor cerebella.

Example I. Samples impregnated for 5 min in the residue of dimethyl terephthalate, heated to 60 ° C. The antiseptic consumption is 184 g / m. Mass loss for 2 months. no exposure is observed. Fouling of samples is also not observed.

Example 2. Samples impregnated for 5 min in the VAT residue of dimethyl terephthalate, heated to 60 ° C. The antiseptic consumption is 123 g / m. Mass loss for 2 months. no exposure is observed. Fouling of samples is also not observed.

Example 3. Samples impregnated for 5 min in the VAT residue of dimethyl terephthalate, heated to 60 ° C. Antiseptic consumption is 137 g / m. Mass loss during 2 months of exposure is not observed.

Fouling of samples is also not observed.

The use of chemical waste as an antiseptic of wood makes it possible to achieve an economic effect in the amount of 10 thousand rubles. per thousand tons of waste, as well as reducing environmental pollution from bioactive waste. For example, dimethyl terephthalate is part of the waste from the widespread production of lavsan.

Claims (2)

1. Technological regulations for the production of dimethyl terephthalate. PA "Angarsknefteorgsintez, 1980, p. 136. 2. Ershin S.N., Wood preservation. M., “Forest Industry, 1977 p. 144