阅读说明：本技术 一种琼脂胶液的制备方法 (Preparation method of agar glue solution ) 是由 肖安风 于 2020-05-18 设计创作，主要内容包括：一种琼脂胶液的制备方法,其特征在于,包括以下步骤：对江蓠进行酸化处理；漂洗至中性；将漂洗后的江蓠加水后加热化胶；加入Ca(OH)<Sub>2</Sub>和/或CaO,以使胶液呈碱性,继续加热；通入CO<Sub>2</Sub>,以与Ca(OH)<Sub>2</Sub>反应生成CaCO<Sub>3</Sub>；过滤,获得琼脂胶液。该方法绿色环保,可制备出高凝胶强度、高产率的琼脂,具备较高应用价值。(The preparation method of the agar glue solution is characterized by comprising the following steps: carrying out acidification treatment on the gracilaria; rinsing to be neutral; adding water into the rinsed gracilaria and heating to melt the glue; addition of Ca (OH) 2 And/or CaO to make the glue solution alkaline, and continuously heating; introducing CO 2 To react with Ca (OH) 2 Reaction to form CaCO 3 (ii) a Filtering to obtain agar gel liquid. The method is green and environment-friendly, can prepare the agar with high gel strength and high yield, and has high application value.)

1. The preparation method of the agar glue solution is characterized by comprising the following steps:

carrying out acidification treatment on the gracilaria;

rinsing to be neutral;

adding water into the rinsed gracilaria and heating to melt the glue;

addition of Ca (OH)₂And/or CaO to make the glue solution alkaline, and continuously heating;

introducing CO₂To react with Ca (OH)₂Reaction to form CaCO₃；

Filtering to obtain agar gel liquid.

2. According to claimThe process according to claim 1, wherein the CO is introduced in the step₂To react with Ca (OH)₂Reaction to form CaCO₃The method comprises the following steps of filtering to obtain agar glue solution:

further introducing CO₂With CaCO₃Reaction to form Ca (HCO)₃)₂。

3. The method of claim 2, wherein the CO is introduced in step₂To react with Ca (OH)₂Reaction to form CaCO₃Further introducing CO₂With CaCO₃Reaction to form Ca (HCO)₃)₂"further comprising the following steps:

pre-filtering to obtain filtrate.

4. The preparation method according to claim 1, further comprising the following steps before the "acidifying Gracilaria", wherein:

carrying out enzymolysis treatment on the gracilaria by using cellulase.

5. The production method according to any one of claims 1 to 4, characterized in that:

addition of Ca (OH)₂According to Ca (OH)₂And mixing the agar gel solution with the weight-volume ratio of 1g:40mL to 1g:20 mL.

6. The production method according to any one of claims 1 to 4, characterized in that:

when CaO is added, the components are mixed according to the weight-volume ratio of 0.757 g/40 mL to 0.757 g/20 mL of CaO and agar gel liquid.

7. The production method according to any one of claims 1 to 4, characterized in that:

the heating temperature range is 100 ℃ to 110 ℃.

8. The production method according to any one of claims 1 to 4, characterized in that:

the length of time of the heating ranges from 8 hours to 10 hours.

9. The production method according to any one of claims 1 to 4, characterized in that:

the specific steps of the acidification treatment are as follows: adding Gracilaria into mixed acid treatment solution containing 0.06% sulfuric acid, 0.012% disodium edetate, and 0.05% oxalic acid, and acidifying for 40 min.

10. A method for producing agar powder, characterized by comprising the steps contained in the production method according to any one of claims 1 to 9, and further comprising the steps of:

cooling and solidifying the obtained agar glue solution, pushing into strips, dehydrating, drying and crushing.

Technical Field

The invention relates to the field of agar processing, in particular to a preparation method of agar glue solution.

Background

Agar is distributed mainly in the medullary space of algal cell wall, and is a hydrophilic polysaccharide extracted from Rhodophyceae. In recent years, the gracilaria has become the main raw material for extracting agar in China. Agar is composed primarily of agarose molecules, including neutral agarose and acidic sulfur agar. The structure of sulfur agar is mainly sulfate polysaccharide, but also contains substituent groups such as pyruvic acid, methyl and the like. The sulfate group can be substituted by alkali treatment, thereby improving the gel strength. Agar has gelling, thickening, and stability properties, and is widely used in food, biotechnology, and medicine.

The existing agar extraction process mainly comprises alkaline extraction and enzymatic extraction, wherein the alkaline extraction usually adopts strong alkali such as NaOH and KOH for treatment, 0.7 ton of NaOH is consumed for producing 1 ton of agar, the produced waste liquid is neutralized by acid and then exceeds 100 tons, and a large amount of high-salt waste water can cause great pollution to the surrounding environment if directly discharged, so that enterprises need to spend a large amount of cost for sewage treatment. The enzymatic extraction process, although not using alkali, uses enzymes which are expensive, easily causes enzyme inactivation and is not beneficial to production in factories.

Therefore, the existing agar extraction process needs to be improved.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a method for preparing agar glue solution and further preparing agar by using the prepared agar glue solution. The method is green and environment-friendly, can prepare the agar with high gel strength and high yield, and has high application value.

Therefore, in one aspect of the invention, the invention provides a preparation method of agar glue solution, which comprises the following steps:

carrying out acidification treatment on the gracilaria;

rinsing to be neutral;

adding water into the rinsed gracilaria and heating to melt the glue;

addition of Ca (OH)₂And/or CaO to make the glue solution alkaline, and continuously heating;

introducing CO₂To react with Ca (OH)₂Reaction to form CaCO₃；

Filtering to obtain agar gel liquid.

Further, in step "CO is introduced₂To react with Ca (OH)₂Reaction to form CaCO₃The method comprises the following steps of filtering to obtain agar glue solution:

further introducing CO₂With CaCO₃Reaction to form Ca (HCO)₃)₂。

Further, in step "CO is introduced₂To react with Ca (OH)₂Reaction to form CaCO₃Further introducing CO₂With CaCO₃Reaction to form Ca (HCO)₃)₂"further comprising the following steps:

pre-filtering to obtain filtrate.

Further, the method comprises the following steps before the step of acidifying the gracilaria:

carrying out enzymolysis treatment on the gracilaria by using cellulase.

Further, it is characterized in that:

addition of Ca (OH)₂According to Ca (OH)₂And mixing the agar gel solution with the weight-volume ratio of 1g:40mL to 1g:20 mL.

Further, when CaO is added, the components are mixed according to the weight-volume ratio of 0.757g:40mL to 0.757g:20mL of CaO and agar gel liquid.

Further, the heating temperature ranges from 100 ℃ to 110 ℃.

Further, the length of time of the heating ranges from 8 hours to 10 hours.

Further, the specific steps of the acidification treatment are as follows: adding Gracilaria into mixed acid treatment solution containing 0.06% sulfuric acid, 0.012% disodium edetate, and 0.05% oxalic acid, and acidifying for 40 min.

A preparation method of agar powder comprises the steps of any one of the preparation methods of agar glue solution, and further comprises the following steps:

cooling and solidifying the obtained agar glue solution, pushing into strips, dehydrating, drying and crushing.

Detailed Description

The technical solution of the present invention is illustrated by specific examples below. It is to be understood that one or more method steps mentioned in the present invention do not exclude the presence of other method steps before or after the combination step or that other method steps may be inserted between the explicitly mentioned steps; it should also be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.

In order to better understand the above technical solutions, exemplary embodiments of the present invention are described in more detail below. While exemplary embodiments of the invention have been shown, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The test materials adopted by the invention are all common commercial products and can be purchased in the market.