RU2455154C1 - Petroleum antiseptic liquid for impregnation of timber - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to antiseptic fluid for impregnation of timber and articles thereof. Proposed liquid comprises distillate fractions of catalytic thermal origin boiling away at 220-480°C in mix with gasoline pyrolysis fractions boiling away at 180-360°C, and/or mix of used oil product fractions, as well as liquid antiseptics, i.e. coal-tar pitch and/or resin oil at the following ratio: mix of oil product fractions - 5-80 wt %, antiseptic making the rest.

EFFECT: efficient protection of sleepers.

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Description

The invention relates to the composition of an antiseptic liquid for the impregnation of wood and products from it WNP, in particular for the impregnation of wooden sleepers.

A known liquid for the impregnation of wooden sleepers and beams, which is a mixture of coal oil, containing an oily fraction of thermal origin, which is a mixture of the 1st anthracene fraction (280-360 ° C) and absorption oil (235-300 ° C) ( GOST 2770-74). Coal-impregnating oil provides good microbiological stability of wood, however, it has high toxicity (2nd hazard class), which sharply worsens the sanitary-hygienic and environmental condition of cross-impregnating industries. In addition, coal-impregnating oil has a high pour point (-5 ° C), which complicates the technology of its application. Due to the indicated environmental and technological deficiencies, coal raw materials are practically not used in wood impregnation plants.

Known oil antiseptic for wood impregnation (RU 2331512, В27К 3/50, В27К 3/34, 2008.08.20, based on products of processing of crude oil, including in a mixture with heavy fractions 25-75: 25-75 (wt.% ) boiling off at certain temperatures.

A known composition for impregnating sleepers (RU 2331513, B27K 3/50, B27K 3/34, 2008.08.20), which uses a mixture of fractions of a secondary oil refining mixed with a pyrolysis resin for the production of ethylene, propylene or its mixture with a pyrolysis resin for the production of ethylene, prolene and heavy gas oil catalytic cracking.

The disadvantage of these impregnation agents is the absence of an antiseptic component in the impregnating liquid that can destroy putrefactive fungi and bacteria, and oily oil products only impede the penetration of moisture into the pores of the wood, i.e. do not have a bactericidal effect, but only delay rot and carry out the so-called "bacteriostatic effect" (Big Soviet Encyclopedia, M., 1972, article "Antiseptic drugs").

A known preservative for wood and a method of manufacturing a preservative for wood (RU A, 2009108343/05, B27K 3/50, 09/20/2010), which is a vegetable oil made from crude tall oil, removing compounds acting as a nutrient medium from it and a food source for putrefactive fungi.

A disadvantage of the known preservative is its limited use due to the high cost of plant materials and the need to remove from it a number of chemical compounds that serve as a nutrient medium for putrefactive fungi.

The closest in essential features to the claimed technical solution is an oil antiseptic liquid for wood impregnation (RU C2, 2243089, IPC B27K 3/50, C09D 5/08), including a mixture of distillate fractions of thermocatalytic origin, boiling within 220-480 ° C and gasoline pyrolysis fractions (FPB) boiling in the range of 180-360 ° C. A certain ratio of the components of the composition allows to obtain an impregnating liquid. The disadvantage of this solution is the low antiseptic activity of the resulting impregnating liquid, which reduces the effectiveness of its use in wood impregnation. Known antiseptic liquid has only a temporary bacteriostatic effect and does not prevent the processes of decay. The objective of the present invention is to obtain an impregnating liquid having a high efficiency of protecting wood from decay and not impairing the technological parameters of the impregnation.

The problem is solved in that the oil antiseptic liquid for wood impregnation, comprising a mixture of fractions of petroleum products, according to the claimed solution as a mixture of fractions of petroleum products contains distillate fractions of thermocatalytic origin, boiling within 220-480 ° C in a mixture with fractions of gasoline pyrolysis boiling in the range of 180-360 ° C and / or a mixture of spent fractions of petroleum products (OFS), as well as liquid antiseptics, coal tar and / or coal oil in the following the total ratio of components, wt.%: a mixture of petroleum product fractions 5-80, antiseptic - the rest.

Distinctive features from the closest analogue are:

- the presence in the mixture of oil antiseptic liquid for wood impregnation liquid antiseptic-coal tar and / or coal oil;

- the use of distillate fractions of thermocatalytic origin as fractions of oil products, boiling within 220-480 ° C in a mixture with gasoline pyrolysis fractions boiling within 180-360 ° C and a mixture of spent petroleum product fractions; or only fractions of thermocatalytic origin boiling in the range of 220-480 ° C in a mixture with gasoline pyrolysis fractions boiling in the range of 180-360 ° C; or only a mixture of spent fractions of petroleum products;

- the use of components of a mixture of antiseptic liquid in the following ratio: oil fractions 5-80, antiseptic - the rest.

In order to increase the efficiency of protecting wood from decay and impairment of technological parameters of impregnation, it is proposed to use distillate fractions of thermocatalytic oil that boil off within 220-480 ° C, and gasoline pyrolysis fractions that boil away at 180-360 ° C in a mixture with spent fractions of oil products. In this case, the mixture of the fraction of oil refining products serves as a diluent for antiseptics.

As antiseptics, liquid antiseptics are used, in particular coal tar and / or coal oil, obtained by high-temperature coking of fossil fuels. At the same time, both antiseptics and combinations of diluents are placed in separate containers. In containers, the components are heated to a temperature of 60-80 ° C, achieving a viscosity of the diluent mixture below the viscosity of the antiseptic by at least 10%. The prepared components of the diluent are mixed with an antiseptic, the temperature of the mixture is brought to 90 ° C and it is left to stand for 1-2 hours before controlling the technological parameters of the obtained impregnating liquid.

The densities of antiseptics and diluents by heating and changing the concentrations of the components of their components are adjusted to densities not differing from each other by more than 10%, and the temperatures in containers with mixed components should be at least 10% lower than the flash point of the liquids in them . The following are examples of the preparation of the inventive oil antiseptic liquid.

Example 1. In a container No. 1, diluents are poured: distillate fractions of oil of thermocatalytic origin (heavy catalytic cracking gas oil (TPP. 220-480 ° C) and gasoline pyrolysis fraction (TPP. 180-360 ° C) in a ratio of 50:50 with a total weight 50% of all impregnation.

Antiseptics are poured into the container No. 2: 1 - coal oil (30 wt.%) And antiseptic 2 (20 wt.%) - coal tar.

In containers with components, the following parameters are monitored: density, viscosity, flash point. By heating the components in tanks No. 1 and No. 2 to 60-80 ° C, and also, if necessary, by varying their concentrations (adding heavier or lighter fractions included in the mixture), the density and viscosity of the diluent and antiseptic are equal. After the components are ready, they are poured into one container, mixed, heating to 90 ° C. The mixture is upheld for 1-2 hours before controlling the parameters of the obtained impregnation.

Example 2. As a diluent, petroleum products used by GOST 21046-86 are used. Sources of spent petroleum products that are used in the proposed technical solution are the enterprises of the system for pumping and transporting petroleum products, oil terminals and tank farms, petroleum product storages, railway transport, river and sea oil tankers, gas station complexes and stations. For this purpose, petroleum oils and petroleum flushing fluids, as well as mixtures of petroleum and petroleum products resulting from the cleaning of storage, transportation means and extracted from treatment facilities and oily waters, can be used.

So, for example, Reshotinsky sleeper impregnation plant (ShPZ, Krasnoyarsk Territory) acquired 2.5 tons of sludge from a mixture of oil and solarium in the locomotive depot of the Ilansk station (Krasnoyarsk railway). characteristics according to GOST 21046-86 (viscosity of the order of 5.6 mm ² / s). This waste oil product was a diluent of antiseptic, coal tar, which was added in an amount of 50 wt.% To the oil product.

All other steps to obtain an antiseptic fluid, as in example 1. The impregnation of the sleepers on the SHP was carried out by cyclic autoclaving according to the method described in patent RU 2230658.

The physical indicators of the obtained oil antiseptic liquid and separately antiseptics are shown in the table in comparison with the indicators of the impregnating liquid of the prototype, oil antiseptic liquid for wood impregnation (RU C2, 2243089, IPC B27K 3/50, C09D 5/08). As follows from the table, the indicators satisfy the existing technical conditions for the impregnation of sleepers, TU 0258-001-71069834-2007 agreed by JSC Russian Railways.

The presence of a liquid antiseptic in the mixture of oil antiseptic liquid for wood impregnation - coal tar and oil, which are known as one of the best antiseptics for wood impregnation, but due to their physical properties (in particular density) do not satisfy the impregnation requirements, allows to obtain an antiseptic liquid possessing high antibacterial effectiveness of protecting wood from decay.

The use of the proposed oil antiseptic liquid for wood impregnation will allow to obtain a significant economic effect by improving the quality of impregnation of wood, in particular railway sleepers, and increasing the duration of its use.

Claims (1)

An oil antiseptic liquid for wood impregnation, including a mixture of fractions of petroleum products, characterized in that the mixture of fractions of petroleum products is represented by distillate fractions of thermocatalytic origin, boiling within 220-480 ° C, with gasoline pyrolysis fractions boiling within 180-360 ° C, and / or a mixture of spent fractions of petroleum products and contains liquid antiseptics - coal tar and / or coal oil in the following ratio of components, wt.%:
mixture of petroleum fractions 5-80 antiseptic rest