A kind of preparation method of agar glue

A kind of technology of agar gel and glue, applied in the field of preparation of agar glue, can solve the problems of enzyme inactivation, unfavorable production, surrounding environment pollution, etc.

Active Publication Date: 2022-07-08
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the extraction process of agar is mainly divided into alkaline extraction and enzymatic extraction. Alkaline extraction is usually treated with NaOH, KOH and other strong alkalis. Generally, 1 ton of agar needs to consume 0.7 tons of NaOH, and the waste liquid produced is neutralized by acid. After more than 100 tons, if a large amount of high-salt wastewater is directly discharged, it will cause great pollution to the surrounding environment, so companies need to spend a lot of money on sewage treatment
Although no alkali is used in the enzymatic extraction process, the enzymes used are expensive and are likely to cause enzyme inactivation, which is not conducive to production in the factory
[0004] Therefore, the extraction process of existing agar needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 (small test, 2.5%, 100°C, 8h)

[0031] Take 25g of jellyfish, remove impurities and clean it, according to the ratio of material to liquid 1:30 (W 江蓠菜 :V 水 ) add water, press 1:100 (W 纤维素酶 : V 料液 ) was added to cellulase, pH was adjusted to 6.5-6.7, and enzymatic hydrolysis was carried out at 50 °C for 2 h. Then press 1:25(W 江蓠菜 : V 处理液 ), add the enzymatic hydrolysis to the mixed acid treatment solution containing 0.06% sulfuric acid, 0.012% disodium EDTA, 0.05% oxalic acid, acidify for 40min, rinse with tap water To neutral, then add water at a ratio of 1:20 to the liquid, stir well, adjust the pH value to 7.8 to 8.0, and cook the gelatin at 100°C until the grass is completely cooked to form agar gel. Add Ca(OH) to the agar gel at a ratio of 1:40 2 , fully stirred, and reacted at 100 ° C for 8 h. Then, pass CO into the glue 2 , the glue appears turbid, resulting in CaCO 3 , when the pH value is 8 to 10, stop the introduction of CO 2 , filtered, an...

Embodiment 2

[0033] Example 2 (small test, 5%, 100°C, 8h)

[0034] Take 25g of jellyfish, remove impurities and clean it, according to the ratio of material to liquid 1:30 (W 江蓠菜 :V 水 ) add water, press 1:100 (W 纤维素酶 : V 料液 ) was added to cellulase, pH was adjusted to 6.5-6.7, and enzymatic hydrolysis was carried out at 50 °C for 2 h. Then press 1:25(W 江蓠菜 : V 处理液 ), add the enzymatic hydrolysis to the mixed acid treatment solution containing 0.06% sulfuric acid, 0.012% disodium EDTA, 0.05% oxalic acid, acidify for 40min, rinse with tap water To neutral, then add water at a ratio of 1:20 to the liquid, stir well, adjust the pH value to 7.8 to 8.0, and cook the gelatin at 100°C until the grass is completely cooked to form agar gel. Add Ca(OH) to the agar gel at a ratio of 1:20 2 , fully stirred, and reacted at 100 ° C for 8 h. Then, pass CO into the glue 2 , the glue appears turbid, resulting in CaCO 3 , when the pH value is 8 to 10, stop the introduction of CO 2 , filtered, and ...

Embodiment 3

[0036] Example 3 (small test, 5%, 100°C, 10h)

[0037] Take 25g of jellyfish, remove impurities and clean it, according to the ratio of material to liquid 1:30 (W 江蓠菜 :V 水 ) add water, press 1:100 (W 纤维素酶 : V 料液 ) was added to cellulase, pH was adjusted to 6.5-6.7, and enzymatic hydrolysis was carried out at 50 °C for 2 h. Then press 1:25(W 江蓠菜 : V 处理液 ), add the enzymatic hydrolysis to the mixed acid treatment solution containing 0.06% sulfuric acid, 0.012% disodium EDTA, 0.05% oxalic acid, acidify for 40min, rinse with tap water To neutral, then add water at a ratio of 1:20 to the liquid, stir well, adjust the pH value to 7.8 to 8.0, and cook the gelatin at 100°C until the grass is completely cooked to form agar gel. Add Ca(OH) to the agar gel at a ratio of 1:20 2 , fully stirred, and reacted at 100 ° C for 10 h. Then, pass CO into the glue 2 , the glue appears turbid, resulting in CaCO 3 , when the pH value is 8 to 10, stop the introduction of CO 2 , filtered, an...

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Abstract

A method for preparing an agar glue solution, comprising the following steps: acidifying Gracilaria; rinsing to neutrality; adding water to the rinsed Gracilaria and heating the gel; adding Ca(OH) 2 and / or CaO, to make the glue solution alkaline, continue heating; pass CO 2 , with Ca(OH) 2 The reaction produces CaCO 3 ; Filtration to obtain agar liquid. The method is environmentally friendly, can prepare agar with high gel strength and high yield, and has high application value.

Description

technical field [0001] The invention relates to the field of agar processing, in particular to a preparation method of agar glue. Background technique [0002] Agar is mainly distributed in the pith intercellular space of algal plant cell walls, and is a hydrophilic polysaccharide extracted from red algae. Gracilaria has become the main raw material for extracting agar in my country in recent years. Agar is mainly composed of agarose molecules, including neutral agarose and acidic sulfur agar. The structure of sulfur agar is mainly sulfate polysaccharide, but it also contains substituted groups such as pyruvic acid and methyl group. Sulfuric acid groups can be replaced by alkali treatment, thereby increasing its gel strength. Because agar has gel properties, thickening properties, stability, etc., it is widely used in food, biotechnology and medicine. [0003] At present, the extraction process of agar is mainly divided into alkaline extraction and enzymatic extraction. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/12
CPCC08B37/0039C08B37/0003
Inventor 肖安风阴小乐张永辉
Owner JIMEI UNIV
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