SU829748A1 - Method of obtaining fibrous cellulose semifinished product - Google Patents
Method of obtaining fibrous cellulose semifinished product Download PDFInfo
- Publication number
- SU829748A1 SU829748A1 SU792796750A SU2796750A SU829748A1 SU 829748 A1 SU829748 A1 SU 829748A1 SU 792796750 A SU792796750 A SU 792796750A SU 2796750 A SU2796750 A SU 2796750A SU 829748 A1 SU829748 A1 SU 829748A1
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- SU
- USSR - Soviet Union
- Prior art keywords
- cooking
- stage
- solution
- carried out
- aqueous solution
- Prior art date
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Description
Поставленна цель достигаетс тем, что в процессе двухступенчатой бисульфитной варки, первую ступень которой провод т с водным раствором бисульфита натри , в качестве варочного раствора на второй ступени варки используют .водный р.аствор пиросульфита натри концентрацией 20-100 г/л.This goal is achieved by the fact that during the two-stage bisulfite cooking process, the first stage of which is carried out with an aqueous solution of sodium bisulfite, an aqueous solution of sodium pyrosulfite with a concentration of 20-100 g / l is used as the cooking solution for the second stage of cooking.
Вторую ступень варки провод т при рН 3,5-5,.О и 1бО-170°С в течение 2,0-3,0 ч.The second stage of cooking is carried out at a pH of 3.5-5, .O and 1O-170 ° C for 2.0-3.0 hours.
В лабораторных услови х провод варки с основой щепы по следукаде-г му температурному режиму:In laboratory conditions, the cooking wire with the chip base follows the temperature conditions:
Начальна температура , осInitial temperature, wasps
90 1,590 1.5
Нагрев до 120с, чHeating up to 120s, h
Пропитка приImpregnated with
12., ч12., h
Нагрев оHeating about
165°С, ч165 ° C, h
Варка при , ч. По известному способуCooking at, h. By a known method
По предлагаемому способуAccording to the proposed method
Гидромодуль 1:5, расход всего S0j2 на первой ступени 20%, на второй -40% от веса древесины. Варочный раствор дл варки на второй ступени по предлагаемому способу готов т путем растворени навески пиросульфита натри в воде до концентрации 100 г/л, а дл контрольных варок - насыщением раствора едкого натра газообразной двуокисью серы.Hydraulic module 1: 5, consumption of all S0j2 at the first stage of 20%, on the second -40% of the weight of the wood. The cooking solution for boiling in the second stage according to the proposed method is prepared by dissolving a portion of sodium pyrosulfite in water to a concentration of 100 g / l, and for control cooking it is saturated with sodium hydroxide solution with gaseous sulfur dioxide.
Состав варочного растврра,%:The composition of the cooking solution,%:
Всего ,41Total, 41
Св занного SO2,34SO2.34 bound
рН4,42pH4.42
Выход целлюлозы, %The yield of cellulose,%
от абсолютнойfrom absolute
сухой древесины59,0dry wood59.0
Степень делигнификации,Delignification degree
ед.Каппа 59,0unit Kapp 59.0
Механические свойства при степени помола (масса отливки 75 г/м2-) :Mechanical properties with the degree of grinding (mass of casting 75 g / m2-):
Разрывна длиаа, м Breaking length, m
Сопротивление излому (число двойных перегибов)Kink resistance (number of double kinks)
Сопротивление продавливанию ,.мПа Burst resistance, MPa
Спротивление раздиранию , НResistance to tearing, N
ПримечаниеNote
Таким образом, предлагаемый способ получени волокнистого цбллюлозного полуфабриката позвол ет пр сокращении продолжительности варки повысить выход и улучшить ме5 ,38 2,78 4,72Thus, the proposed method for the preparation of a fibrous blob semi-finished product allows, by shortening the cooking time, to increase the yield and improve the mea, 38 2.78 4.72
61,0 59,261.0 59.2
1050010,500
24692469
5,6 6595.6 659
В таблице приведены средние данные по 6 варкам древесины сосны.The table shows the average data for 6 pine wood cooking.
ханические свойства получаемого полуфабриката .Chanical properties of the obtained semi-finished product.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792796750A SU829748A1 (en) | 1979-07-13 | 1979-07-13 | Method of obtaining fibrous cellulose semifinished product |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792796750A SU829748A1 (en) | 1979-07-13 | 1979-07-13 | Method of obtaining fibrous cellulose semifinished product |
Publications (1)
Publication Number | Publication Date |
---|---|
SU829748A1 true SU829748A1 (en) | 1981-05-15 |
Family
ID=20840858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792796750A SU829748A1 (en) | 1979-07-13 | 1979-07-13 | Method of obtaining fibrous cellulose semifinished product |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU829748A1 (en) |
-
1979
- 1979-07-13 SU SU792796750A patent/SU829748A1/en active
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