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Preparation of Corn Starch Adhesive Using Cannabis Degumming Waste Liquid
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A technology of corn starch glue and corn starch, which is applied in the direction of starch-derived adhesives, pectin adhesives, adhesive additives, etc., can solve the problems of cannabis degumming waste liquid pollution, etc., to save preparation costs, reduce preparation costs, and solve Effects of Environmental Pollution Problems
Inactive Publication Date: 2016-08-03
WEST ANHUI UNIV +3
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[0005] The present invention aims to prepare corn starch adhesive by using strong alkali, pectin, lignin and hemicellulose in hemp degumming waste liquid, which not only solves the pollution problem of hemp degumming waste liquid to the environment, but also reduces the cost of corn adhesive. Preparation cost, technical effect of the present invention is reflected in several aspects:
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Embodiment 1
[0017] Taking hemp degumming waste liquid containing 4.5% NaOH; 6.5% pectin; 3.1% lignin; 3.2% hemicellulose; 1.7% other solid components; 81% water as an example to prepare corn starch. Specific steps are as follows:
[0018] Step 1: Preparation of Carrier Starch
[0019] Weigh 37.04Kg of cornstarch into the reaction kettle, stir evenly with 95Kg of water, and adjust the temperature of the water bath to 40±2°C. Accurately Weigh Catalyst FeSO 4 Add 0.22Kg to 5Kg of water to dissolve and add to the reaction kettle. Weigh the cannabis degumming waste liquid 265.00Kg again, slowly add part of the cannabis degumming waste liquid to the reactor, and constantly measure the pH value of the carrier starch to 11.0-11.2 (add about 55.0Kg of the cannabis degumming waste liquid). Take 8.88Kg30%H 2 o 2 And dilute with 7.78Kg water, slowly add carrier starch solution. React for 120 minutes, after the starch oxidation is complete, add all the remaining hemp degumming waste liquid, stir...
Embodiment 2
[0025] The hemp degumming waste liquid contains 5.0% NaOH; 6.8% pectin; 3.3% lignin; 3.4% hemicellulose; 1.9% other solid components; Take cornstarch as an example. Specific steps are as follows:
[0026] Step 1: Preparation of Carrier Starch
[0027] Weigh 37.04Kg of cornstarch into the reaction kettle, stir evenly with 95Kg of water, and adjust the temperature of the water bath to 40±2°C. Accurately Weigh Catalyst FeSO 4 Add 0.22Kg to 5Kg of water to dissolve and add to the reaction kettle. Weigh the cannabis degumming waste liquid 263.00Kg again, slowly add part of the cannabis degumming waste liquid to the reactor, and constantly measure the pH value of the carrier starch to 11.0-11.2 (add about 54.0Kg of the cannabis degumming waste liquid). Take 8.88Kg30%H 2 o 2 And dilute with 7.78Kg water, slowly add carrier starch liquid. React for 120 minutes, after the starch oxidation is complete, add all the remaining hemp degumming waste liquid, stir evenly and set aside. ...
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Abstract
The invention discloses a preparation method of corn starch adhesive through cannabis degummed waste liquor, which comprises the following steps: a, the preparation of carrier starch, b, the preparation of main starch, and c, the preparation of the corn starch adhesive. Corn starch is dissolved in warm water at 40 plus or minus 2 DEG C, and then catalyst FeSO4 is added. Cannabis degummed waste liquor is added till the pH value is 11.0 to 11.2, H2O2 is slowly added, and reaction is performed for 120min. Residual degummed waste liquor is added and stirred. Borax is dissolved in warm water at 40 plus or minus 2 DEG C, and then corn starch is added and uniformly mixed, and a small amount of tributyl phosphate is added, so as to perform defoaming. The carrier starch is added into the main starch while being stirred, stirring is performed for 30min, heat preservation is for 30min at 40 plus or minus 2 DEG C, and then a finished product is obtained after cooling. For producing 1 ton of adhesive, 166 Kg of corn starch, 260 Kg of degummed waste liquor, 0.22 Kg of FeSO4, 8.88 Kg of 30 percent H2O2, 2.33 Kg of borax, and 0.11 Kg of tributyl phosphate are required. The method is simple in processes and easy for industrialization, reduces the pollution of the cannabis degummed waste liquor, reduces the environmental management cost, simultaneously reduces the preparation cost of the corn starch adhesive, and increases the economic efficiency of enterprises and social benefit.
Description
technical field [0001] The invention relates to a method for preparing cornstarch adhesive by utilizing hemp degumming waste liquid, which belongs to the field of biochemical industry. Background technique [0002] Hemp for fiber is one of hemp and one of the important textile raw materials in my country. The product after degumming hemp is "hemp dry hemp". The hemp dry hemp can be spun purely or blended into hemp yarn. Cannabis degumming is an important process in hemp processing. At present, the bio-chemical combined degumming method is widely used in China. That is: first soak the hemp bast fiber with biological degumming bacteria, and the pectinase produced by the degumming bacteria decomposes most of the pectin. This process is carried out at room temperature (biological degumming); the hemicellulose and lignin in the hemp bast It needs to be removed, but it can only be removed by cooking with alkali (NaOH) solution (chemical degumming); the waste water generated in th...
Claims
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