SU938902A1 - Method of producing agaroid from red algae - Google Patents

Description

(54) METHOD OF OBTAINING AHAROID FROM RED SALVINE PHYLLOFORA

The invention relates to a method for preparing jellied formers from red seaweed, namely to a method for producing an agaroid from the Black Sea alga Phyllofora.

A known method for producing an agaroid from red algae fillofory involves washing the algae with water, treatment with alkali and acid, extraction in two stages, the first of which is extraction with an agaroid solution, separating the extract and drying 1.

However, in the known method at the stage of treating algae with alkali, there is a large loss of the gelling agent due to the dissolution of its low molecular weight fraction, the process of extraction of the gelling agent is long, and the cost price of the product. high by using a large amount of sodium hydroxide.

The purpose of the invention is to increase the yield

agaroid, reducing its cost and reducing the duration of the process.

This goal is achieved by the fact that in the & obtaining agaroid from red

Fillophor algae, including washing the algae with water, treating with a solution of alkali and acid, extracting in two stages, the first of which extracting the agaroid with its own solution of separating the extract and drying, treating the algae with acid after washing in two stages, the alkali is introduced after treatment with acid for neutral. the algae were digested, and the first stage of the extrusion of the agaroid was carried out for 15-30 minutes.

The method is carried out as follows.

Air dry seaweed is washed in, 5 doi, treated with 0.05-0.1 n. hydrochloric acid in two stages, the first of which uses the acid from the second stage. The duration of the first stage is 0.25-0.5 h, / the second - 0.75-1.0 h, and the total duration of treatment is 1.0-1.5 h.

Treatment of algae with acid can be combined with their washing.

Acid-treated algae are neutralized with sodium hydroxide solution, washed and sent for extraction.

The extraction was carried out in two stages, the first of which used a solution of agaroid with a concentration of 0.4-0.8 / o, -a in the second water. The first stage is carried out at 95-100 ° C and pH 7.5-8.0 for 15-30 minutes, and the second at the same duration at 90-100 ° C and pH 7.0-7.5.

In order to carry out the technological cycle, the resulting solution of agaroid in the second stage is used for carrying out the first stage of the extraction batch of algae. To separate the extract from algae residues and mechanical impurities, it is filtered, centrifuged, or settled. The purified extract is dried.

Example 1. 100 kg of air-dried algae are thoroughly washed with water, they are poured with 1.5 m of hydrochloric acid with a concentration of 0.035 N and transferred for 0.5 h, then the spent acid is drained. Algae again poured 1.5 m of hydrochloric acid concentration of 0.075 n. and stirred for 1.0 h.

The algae are separated from the acid, they are poured onto 1.5 m of water and neutralized with a re-strength of 2, aqueous studium agaroid, g Not less than

STRENGTH 2, sugar-water stud agaroid, g

Content of nitrogenous substances (total nitrogen), Not less

The concentration of agaroid in the extract,%

The output of the agaroid,%

As follows from the table of data, the samples obtained in examples 1 and 2 are practically indistinguishable in their indicators.

The implementation of the proposed method allows an increase in the yield of the target product by more than 50% compared with the yield of the product obtained according to the technology described in the prototype, by maintaining the low molecular weight fraction of the agaroid in mixing with 7% sodium hydroxide solution.

The neutralized water is separated from the solution, washed with the same volume of water and fed to the extraction.

Extraction is carried out at a water ratio of 1:12 in two stages. In the first stage, 1.1 m of hot (80 ° C) agaroid solution of 0.6% concentration is poured onto the algae, heated to 35 ° C and maintained at this temperature for 30 minutes. The extract is separated from the algae, filtered, centrifuged and dried. The separated algae are subjected to repeated extraction with water under the same conditions. The second stage extract is separated from the algae residues and is subsequently used to extract the agaroid from the new batch of algae.

Example 2. The method according to the techniques and operations is identical to the method described in example 1, except that during extraction, its extract from the second stage, obtained as indicated in example 1, is used as an agarod solution.

The test results are shown in the table.

not chill

180

2160 2250

not less than 1800

0.83 0.85

1.0

3.13.3

30 33

the process of obtaining it; shorten the process time by reducing the extraction of agaroid by more than 2 times compared with the known method; reduce the cost of the product by reducing the consumption of sodium hydroxide by more than 5 times.

Claims (1)

Claim 1. Method for producing red algae agaroid phyllophor by washing 5 9389Q26 algae with water; treatment with solutions was injected after acid treatment for the neutracid and acid; extraction into two stabilizations of algae. days, on the first of which the extraction2. The method according to claim 1, wherein the agaroid is carried out by its separation solution, which is the first stage of the extraction of the agaroid proextract and drying, characterized in that it is left for 15-30 minutes. in order to increase the yield of agaroid, lower-5 the cost of it and reducing the continuity of information sources process, algae treatment is taken into account in the examination acid leaching is carried out after flushing. USSR author's certificate during 1.0-1.5 hours in two stages, and alkaline № 603367, cl. A 23 L 1/04, 1978.