阅读说明：本技术 一种从沙菜中提取卡拉胶的方法 (Method for extracting carrageenan from hypnea ) 是由 蔡鹰 胡章 李思东 吴湛霞 黄娜 *** 于 2019-10-29 设计创作，主要内容包括：本发明提供一种从沙菜中提取卡拉胶的方法,包括如下步骤：1)碱处理：采用碱溶液浸泡沙菜原料,结束后,清洗,得到碱处理后的沙菜；2)机械破碎：将步骤1)所得的沙菜粉碎,得到胶液；3)提胶及粗过滤；将步骤2)所得的胶液加热提胶,结束后,离心过滤,得到过滤液；4)板框压滤；将步骤3)所得的过滤液板框压滤,得到压滤液；5)活性炭脱色；将活性炭与步骤4)所得的压滤液混合,脱色处理,结束后,压榨过滤,将所得过滤液后处理得到产品。本发明去除了用化学品加工提取卡拉胶时的酸化、漂白工序,耗水量只是常用化学加工方法的55％左右,产生的含化学品的废水大幅减少。(The invention provides a method for extracting carrageenan from hypnea, which comprises the following steps: 1) alkali treatment: soaking the sauerkraut raw material with an alkali solution, and cleaning to obtain alkali-treated sauerkraut; 2) mechanical crushing: crushing the salad obtained in the step 1) to obtain a glue solution; 3) extracting glue and coarse filtering; heating the glue solution obtained in the step 2) to extract glue, and after the glue solution is extracted, performing centrifugal filtration to obtain filtrate; 4) performing plate and frame filter pressing; performing plate-and-frame filter pressing on the filtrate obtained in the step 3) to obtain a filter pressing solution; 5) decoloring with active carbon; mixing activated carbon with the press filtrate obtained in the step 4), decoloring, pressing and filtering after the decoloring, and post-treating the obtained filtrate to obtain the product. The invention eliminates the acidification and bleaching procedures when processing and extracting the carrageenan by chemicals, the water consumption is only about 55 percent of that of the common chemical processing method, and the generated waste water containing the chemicals is greatly reduced.)

1. A method for extracting carrageenan from hypnea is characterized by comprising the following steps:

1) alkali treatment: soaking the sauerkraut raw material in a potassium hydroxide aqueous solution, cleaning after the soaking, and removing a cleaning solution to obtain alkali-treated sauerkraut;

2) mechanical crushing: crushing the salad obtained in the step 1) to obtain a glue solution;

3) extracting glue and coarse filtering; heating the glue solution obtained in the step 2) to extract glue, and after the glue solution is extracted, performing centrifugal filtration to obtain filtrate;

4) performing plate and frame filter pressing; performing plate-and-frame filter pressing on the filtrate obtained in the step 3) to obtain a filter pressing solution;

5) decoloring with active carbon; mixing activated carbon with the press filtrate obtained in the step 4), decoloring, pressing and filtering after the decoloring, and post-treating the obtained filtrate to obtain the product.

2. The method of claim 1, wherein: in the step 2), crushing until no obvious visible solid is generated.

3. The method of claim 1, wherein: in the step 2), water with the weight 5-6 times of that of the salad material is added during crushing.

4. The method of claim 1, wherein: in the step 3), during the extraction of the gum, water with the weight 15-20 times of that of the salad raw material is added into the gum solution obtained in the step 2).

5. The method of claim 1, wherein: in the step 3), during the extraction of the glue, the glue solution is heated to the temperature of 90-100 ℃; during centrifugal filtration, the temperature of the glue solution is kept at 90-100 ℃.

6. The method of claim 1, wherein: in the step 4), diatomite with the fineness of 160-200 meshes is added into water to prepare slurry for precoating a plate-and-frame filter press, wherein the temperature of the water is 90-95 ℃, and the mass concentration of the slurry is 2-3%.

7. The method of claim 1, wherein: in the step 4), diatomite with the fineness of 50-80 meshes is added into the glue solution, and the mixture is squeezed and filtered.

8. The method of claim 7, wherein: in the step 4), the weight of the diatomite accounts for 1-2.5% of the weight of the glue solution, and the glue solution is kept at 90-100 ℃ during plate and frame filter pressing.

9. The method of claim 1, wherein: in the step 5), during the decolorization treatment, the temperature of the glue solution is kept at 70-75 ℃, the fineness of the activated carbon is 120-160 meshes, and the weight consumption of the activated carbon is 0.3-0.7% of the weight of the glue solution.

10. The method of claim 1, wherein: in the step 5), the post-processing includes: adding KCl into the squeezed and filtered glue solution, cooling, pushing strips, squeezing for dehydration, drying and crushing to obtain the product.