SU1283260A1 - Method of delinting cotton seeds - Google Patents

Description

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The invention relates to the textile industry and can be used to expose cotton seeds.

The purpose of the invention is to eliminate damage to the seeds and reduce the consumption of the treated reagents.

In the proposed method, the lowered cotton seeds before processing the seeds with sulfuric acid solution lase, and then dried to remove moisture only from the padding, leaving it on the peel.

After that, the seeds are treated with a weak solution of sulfuric acid with subsequent concentration of it by repeated drying of the seeds. Delint hydrolyzes, becomes brittle and is easily removed by mechanical action on the seeds. Subsequently, the removed delint is treated with a neutralizing reagent.

When drying pre-moistened cotton seeds, the moisture begins to be removed from the undercoat first, some of the moisture goes into the drying agent, and some of it goes into the peel and into the seed core and a period occurs when the seed peel is transferred from moisture compared to. underpressure. Processing at this point the seed with a small amount of acid solution provides the necessary wetting of the bottom without undesirable acid application to the seed coat. By further drying the seeds, the concentration of the acid wetting the undercoats increases to the extent that the delint is hydrolyzed, its destruction occurs, it becomes brittle and brittle, and the strength of its adhesion to the peel is significantly reduced. In this state, the delint is easily separated from the skin by mechanical action on the seeds (for example, by rubbing them against the perforated surface and between themselves). Treatment of seeds with an acid solution by the proposed method makes it possible to apply the required amount of acid only on the undergrowth without applying it to the seed rind, which eliminates damage to the latter and reduces the consumption of both the acid itself and the chemical necessary to neutralize the seeds after their production.

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VNIIPI

Order 7378/22

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20

25

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2832602

In order to speed up the process and to ensure uniform wetting of the seeds when they are moistened, acid resistant surface active substances can be used.

Note The pubescent seeds are moistened with water or a surfactant solution until they are fully wetted with vigorous stirring. The seeds are further dried for 10–30 minutes (depending on the temperature of the drying agent, the design of the dryer, and other factors) to a significant decrease in moisture compared to the skin, and then treated with 4–6% sulfuric acid solution. The amount of acidic solution is taken from the calculation of 12-20% of the initial weight of seeds n. The treatment with the acid solution is carried out for 3-5 minutes until the padding is completely wetted (the duration of treatment depends on the intensity of mixing). Then the seeds are re-dried. In this case, only the water contained in the acid solution evaporates, the concentration of the acid decreases, which ensures the destruction of the delint (hydrolysis), after which the delint is removed mechanically. The separation delint (if it is not intended for hydrolytic indus- try) is neutralized, for example, with gaseous ammonia, and there is no need to neutralize bare seeds.

Claims (2)

1. A method for delintering cotton seeds, including treating the seeds with a weak solution of sulfuric acid followed by its concentration by drying the seeds, mechanically exposing the seeds and neutralizing the delint, characterized in that, in order to eliminate the damage to the seeds and reduce the consumption of the processing reagents Before being treated with a weak solution of sulfuric acid, the seeds are moistened, followed by their drying until moisture is removed from the cannon only. 2. The method according to claim 1, wherein t and h and y and the fact that as a moisturizing agent using aqueous solutions of surfactants. 427 Subscription