SU1555365A1 - Method of vegetable raw material hydrolysis - Google Patents

Abstract

The invention relates to the hydrolysis industry and allows increasing the yield of monosaccharides during the two-stage hydrolysis of vegetable raw materials with a 0.5% solution of sulfuric acid. The first hydrolysis stage is carried out at 130-150 ° C for 40 minutes, the second at 180-190 ° C for 60 minutes. In the process of hydrolysis, hydroxyethylidene diphosphonic acid, ionol, Mannich base, diphenoquinone are used as inhibitors of monosaccharides in amounts of 0.1 - 1.0 wt.% From absolutely dry raw materials. 2 tab.

Description

The invention relates to the hydrolysis industry and can be used to produce reducing substances (PB), yeast, alcohol, etc.

The aim of the invention is to increase the yield of monosaccharides.

Hydroxyethylidene diphosphonic acid (OEDPA), ionol, Mannich base, diphenoquinone are used as inhibitors of the destruction of monosaccharides.

The use of inhibitors of the destruction of Monosaccharides prevents their decomposition in the process of hydrolysis of plant raw materials, thereby increasing the BYSH.OD monosaccharides and, as a consequence of this, improving the good quality of the hydrolyzate,

Example 1. In three collections of cooking acid, a 0.5% solution of sulfuric acid is prepared in advance in an amount of 100 liters, in which 9 g of 0.1 wt.% Of the absolutely dry substance (a.s.s..) Mannich base is dissolved. , then 9 kg of atsv, consisting of a mixture of coniferous (50 wt.%) and hardwood (50 wt.%) wood are loaded into the hydrolysis apparatus (HA) and at the same time 20 l of 0.5% sulfuric sulfur are pumped acid with a dissolved Mannich base in it. The mixture is heated to ISO-ISO Q for

10 minutes and during 40 minutes the first stage of hydrolysis is carried out with supply of 40 liters of cooking mixture to the upper HA fitting and sampling through the lower HA fitting 50 of the hydrcyl lysate. Then raise the temperature

in the apparatus up to 180-190 ° C and carried out

11th stage of hydrolysis with the supply of 40 l of cooking mixture to the upper GA fitting and sampling through the lower GA fitting 60 e of the hydrolyzate.

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The hydrolyzate in the hydrolyzate is determined by the percentage of reducing substances (PB) by the ebuliostatic method, its good quality is judged by the yield of yeast from PB grown in 250 ml flasks using the known method.

Subsequent experiments were carried out under similar conditions and differ only in the type of inhibitor, the percentage ratio of the inhibitors of the Sugar degradation inhibitors.

Control cooking carried out without any additives.

The results of the influence of the addition of inhibitors of sugars destruction on the yield of PB and the good quality of the hydrolyzate are given in Tables 1 and 2.

The introduction of additives of sugars inhibitors leads to a significant increase in the yield of RV from cooking compared to the control, as well as to an increase in the purity of the hydrolyzate due to a decrease in the decomposition products of monosaccharides, which is proved by a significant increase in the yield of yeast.

The addition of the Mannich base additive in an amount of 0.01-0.1 wt.% Of a.s.s. leads to an increase in the yield of PB by 11.9% of the yield of yeast - by 2.5%.

When added to the cooking solution of 0.005-1.0 wt.% From -A.S. OEDFC

the yield of PB is increased by 35.7%, the yield of yeast from PB is increased by 17%.

Additive 0.05-0.5 wt.% From a. n. diphenoquinone leads to an increase in the yield of PB by 7.2%, yeast - by 4.3%

The introduction of ionol into the cooking solution in an amount of 0.1–1 wt.% Of A.c.. increases PB by 21.2%, the yield of yeast — by 3.1%.

As can be seen from Tables 1 and 2, the addition of inhibitors of the destruction of monosaccharides in concentrations other than those given does not lead to an increase in the yield of RV welding and the yield of yeast, as compared with the control.

Claims (1)

Formula of identiation The method of hydrolysis of vegetable raw materials, including a two-stage treatment of raw materials with sulfuric acid: in the first stage at a temperature of 130-150-1 ° C, and in the second stage - 180-190 ° C, characterized in that, in order to increase the yield of monosaccharides, hydrolysis is carried out the presence of a monosaccharide degradation inhibitor, which uses a substance selected from a series; Mannich base, hydroxyethylidene diphosphonic acid, diphenoquinone or ionol in amounts from 0.01 to 0.1, 0.05-1.0, 0.05-0.5, 0.1-1.0 wt.%, respectively.