RU2327735C1 - Processing method for exhausted oak clapboard - Google Patents

Abstract

FIELD: wine industry.

SUBSTANCE: exhausted oak clapboard, subjected to mechanical deformation by means of roll milling process, is placed in the tank, is filled in with warmed up to 30-35°C with 0.5-1.0% water solution of an oak extract, is aged within 7 days. An extract solution is poured off, warmed up to 30-35°C, a repeated filling in is carried out during 7 days, with periodical mixing, then an oak clapboard is washed out by softened water.

EFFECT: this method allows to improve organoleptic indicators of young cognac spirit aged in contact to it during tank aging essentially, to reduce power inputs and to make multiply application of oak clapboard.

3 tbl, 6 ex

Description

The invention relates to the wine industry, in particular to methods for reusing depleted oak rivets, and can be used in the technology of reservoir aging of cognac alcohols.

A known method for the effective use of oak rivets in contact with brandy alcohol for at least 9 years in the process of tank aging, providing for its grinding (crushing) to the size of wood chips, followed by pouring for 1-1.5 months with rectified alcohol, draining the extract, then carrying out repeated extraction with softened water heated to 80-90 ° С, mixing of both extracts and their use in blends of cognac spirits [TS Khiabakhov et al. Method for the production of a strong drink. RF patent No. 2031924, bull. No. 9, 1995].

A known method of wood processing, in which to accelerate the formation of substances in oak wood that contribute to the production of high-quality cognac alcohol, provides for exposure to ultraviolet light from a mercury-quartz lamp located at a distance of not more than 50 cm from the treated wood for 50-100 hours, depending on the variety oak and humidity [A.S. USSR No. 178969, C12G 3/07, bull. No. 4, 1966].

The closest is a method for the regeneration of depleted oak rivets, which involves crushing it into wood chips and placing it in a tank, sealing, evacuating, injecting oxygen and holding the rivets in oxygen under pressure for 24-30 hours [T.S. Khiabakhov. The method of regeneration of depleted oak rivets, and.with. USSR No. 1721083, bull. No. 11, 1992, p.86].

The disadvantages of the existing method are the need for a special machine for grinding oak rivets to specified sizes, significant energy consumption for the grinding process, sealing the tank for processing rivets and its evacuation, which requires increased mechanical strength of the tank, and this method also excludes the possibility of re-regeneration of oak rivets . During the implementation of the method under the influence of oxygen, excessive formation of peroxide compounds is possible, which negatively affects the further process of reservoir aging and the quality of cognac alcohol.

The technical result when using the present invention is to improve the quality of cognac spirits aged in contact with the processed rivets, reduce energy costs for the processing process, the possibility of reusing oak rivets.

The technical result is achieved due to the fact that the pouring is mechanically deformed by rolling the rivets heated to 30-35 ° C with a 0.5-1.0% aqueous solution of oak extract, incubated for 7 days, the extract solution is drained, heated to 30- 35 ° C, re-fill for 7 days, periodically mix and wash the oak stave with softened water.

To process the rivets, Tanol dry oak extract of wood, developed by the Dialog enterprise in accordance with TU 9185-259-00334600-05 (Goryachy Klyuch, Krasnodar Territory), is used. The technology for producing Tanola consists in extracting tannides from oak wood chips with hot water, with subsequent use of membrane filtration. The technology uses oak wood sawmill waste (furniture and parquet production), at least 80 years old. After obtaining a liquid extract with a solids concentration of about 200-250 g / dm ³ , the liquid fraction is dried to obtain dry Tanol crystals.

Parameters of dry extract (%, not less): tannins - 40-43, lignin - 32, hemicelluloses - 14, quercetol - 4, minerals - 0.5; humidity is about 8%.

The advantages of the proposed method are as follows: a one-time mechanical deformation of the rivets is carried out, preventing its destruction to chips, do not use physical and chemical processes to activate the surface of the oak rivets, subsequent repeated use of the rivets in the process of processing the oak extract solution is allowed. The proposed method requires little energy and is more economical, as it does not lead to the formation of waste oak rivets.

Using the proposed combination of essential features set forth in the claims, it is possible to achieve the desired technical result - the regeneration of depleted oak rivets, and ensures the production of cognac alcohols superior to cognac alcohols obtained using oak rivets processed according to the prototype method .

Case Studies

Example 1

For experiments, we used depleted oak rivets used for the tank aging of cognac spirits, and dry oak extract “Tanol” produced by the company “Dialogue”, Goryachiy Klyuch. The riveting was subjected to mechanical deformation by rolling, placed in a tank and filled with the height of the riveting stack with a 0.2% aqueous solution of oak extract heated to a temperature of 30-35 ° C and kept for 7 days with periodic stirring. After 7 days, the solution was poured, heated to 30-35 ° C and re-poured into the tank for 7 days. The solution was heated to sterilize and increase the mass transfer rate between the extract solution and oak riveting. Then the rivets were rinsed with softened water and poured with young cognac alcohol, produced by traditional technology, with a strength of 69.4 vol.%. For the experiments we used young cognac alcohol with the following mass concentrations of components (mg / dm ³ bp): acetaldehyde - 340.0; the amount of esters - 620.2; acetals - 96.0; higher alcohols - 1620, acetic acid - 141.0. Young cognac alcohol did not contain phenolic substances and aromatic aldehydes. Physicochemical measurements were carried out periodically.

Example 2

The method was carried out analogously to example 1, except that used a 0.5% aqueous solution of oak extract.

Example 3

The method was carried out analogously to example 1, except that used a 0.8% aqueous solution of oak extract.

Example 4

The method was carried out analogously to example 1, in addition to using a 1% aqueous solution of oak extract.

Example 5

The method was carried out analogously to example 1, except that a 1.5% aqueous solution of oak extract was used.

Example 6

The method was carried out according to the prototype method. Physico-chemical, organoleptic and other indicators characterizing the method of processing oak rivets are shown in Table 1-3. As a control, we used traditional tank aging of cognac alcohol.

Table 1. Indicators of the chemical composition of brandy alcohol in 1080 days after the start of observations Example The chemical composition, mg / DM ³ BS Assessment
point Acetaldehyde Amount of Ethers Acetal Acetic acid Higher alcohols Phenolic substances one 332 747 124 155 1668 330 8.15 2 319 776 130.5 162 1677 358 8.2 3 277 816.7 133.5 168 1686 374 8.25 four 282 811.4 134.8 170 1682 397 8.25 5 314 806.6 133.0 166 1680 422 8.2 Prototype 355 681 112 149 1633 327 8.1 The control 347 645 106.5 150 1638 282 8.0

Table 2. The content of aromatic aldehydes in cognac alcohol 360 days after the start of observations Example Aromatic aldehydes, mg / DM ³ Synapovy Coniferyl Lilac Vanillin one 0.34 0.41 1.23 0,054 2 0.62 0.71 1.37 0,081 3 0.83 0.93 1.55 0,092 four 0.71 0.96 1,66 0.12 5 0.58 0.88 1.47 0,065 Prototype 0.16 0.26 0.59 0,022 The control 0.08 No 0.34 No

Table 3. The content of aromatic aldehydes in cognac alcohol in 1080 days after the start of observations Example Aromatic aldehydes, mg / DM ³ Synapovy Coniferyl Lilac Vanillin one 0.43 0.39 2.20 0.34 2 0.57 0.60 2,31 0.59 3 0.68 0.73 2.45 0.69 four 0.69 0.76 2,56 0.59 5 0.61 0.68 2.41 0.65 Prototype 0.57 0.48 1.77 0.24 The control 0.38 0.19 1.39 0,035

An analysis of the results showed that:

- the use of an aqueous solution of the extract for the treatment of depleted rivets led to significant changes in the composition of cognac alcohol in all controlled indicators, especially in the content of esters and aromatic aldehydes. The data obtained are explained by the fact that the components of the oak extract as a result of double pouring into the tank with depleted oak rivets were absorbed by depleted rivets, which showed pronounced sorption properties with saturation of both the surface and deep layers, to which the extract components gained access as a result of rolling rivets ;

- as a result of processing, in comparison with the prototype method, the mass concentration of acetaldehyde decreased by 20-22%, the mass concentration of esters increased by 17-20%, by acetal and aromatic aldehydes several times that form a characteristic cognac aroma;

- especially significant changes were found for the content of aromatic aldehydes: at the end of the first year of observation in the proposed treatment options and prototype, all the studied aldehydes are present, however, for the prototype method, their content was 2-4 times lower; only synapic and lilac aldehydes were detected in the control. After 3 years of exposure, in comparison with the prototype in experimental versions, the concentration of synapaldehyde was higher by 19%, coniferyl aldehyde - by 52%, lilac aldehyde - by 38%; vanillin - 2-2.8 times;

- the data obtained are explained by the fact that under the action of sorption of depleted rivets of the extract components, a full reproduction of the main chemical, physico-chemical and biochemical transformations occurs, in total leading to an improvement in the quality of aged cognac alcohol. Improving the quality of cognac alcohol is achieved by increasing the mass concentration of esters, acetal, higher alcohols, acetic acid, while reducing the concentration of acetaldehyde. The decrease in the mass concentration of acetaldehyde in experimental versions No. 2-4 may have occurred due to the fact that he was actively involved in the formation of ethers and acetal, since the content of ethers and acetal increased significantly in experimental samples compared to the prototype. The content of aromatic aldehydes directly forming the typicality of cognac alcohols has significantly increased in experimental versions in comparison with the prototype and control. The components of the oak extract were specifically sorbed in the intercellular space of wood in microcracks formed as a result of mechanical deformation of the riveting, with the direct participation of capillary forces. Subsequent exposure was accompanied by a complex mass transfer of the developed surface of wood microcracks, which sorbed the components of the oak extract with cognac alcohol, completely repeating the processes of reservoir aging of cognac alcohols. Thus, the complex interaction of the capillary forces of the intercellular space, the formation of hydrogen bonds in the structure and adsorption processes was achieved;

- in the case of processing depleted oak staves according to examples No. 1-5 in the resulting brandy spirits, the development of a harmonious aroma with expressive tones of aged brandy alcohol, a light vanilla tint and an organoleptic characteristic is higher than that of the prototype.

Using the proposed method for the treatment of depleted oak rivets used for tank aging, compared with the prototype method, led to a significant improvement in the organoleptic characteristics of the aged cognac alcohol aged in it, made it possible to achieve a higher quality due to the optimal composition of volatile components and aromatic aldehydes that cause specific organoleptic properties of the finished product. Processing technology allows multiple processing of depleted oak staves.

The best performance was achieved when processing depleted oak rivets with a 0.5-1% aqueous solution of oak extract.

Claims (1)

A method of processing depleted oak rivets, involving mechanical deformation of the rivets by rolling, placing it in a tank, pouring 0.5-1.0% aqueous solution of oak extract heated to 30-35 ° C, holding for 7 days, draining the extract solution, heating it to 30-35 ° C, re-pouring, holding for 7 days, periodic stirring and subsequent washing of oak staves with softened water.