A method for beating indigo and a method for producing indigo naturalis

Abstract

The present invention belongs to the technical field of drug extraction technology, and specifically relates to an indigo beating method and an indigo natural production method. The indigo beating method of the present invention is to add lime milk and carbonated water to the fermentation liquid of indigo, and introduce compressed air to be indigo beating. The present invention also provides an indigo natural production method including the above-mentioned indigo beating method. The present invention improves the production process of indigo natural, adds carbonated water in the indigo beating process, and thereby improves the bulk density of the obtained indigo natural product, thereby improving the dispersibility and fluidity of the product, and improving the quality of the product. Therefore, the present invention has a good application prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of drug extraction technology, and specifically relates to an indigo extraction method and an indigo naturalis production method. Background Art

[0002] Indigo is a dry powder, agglomerate or granule obtained by processing the leaves or stems of the Acanthaceae plant Indigofera tinctoria, the Polygonaceae plant Indigofera tinctoria and the Cruciferae plant Isatis indigotica. It has the effects of clearing away heat and detoxifying, cooling blood and removing spots, purging fire and calming the nerves. In ancient times, it was also commonly used for printing and dyeing cloth, thrush, etc. It is mainly produced in Fujian, Yunnan, Jiangsu and other places. It has salty and cold nature and has the effects of clearing away heat and detoxifying, cooling blood and removing spots, purging fire and calming the nerves. It is mainly used for febrile diseases with excessive heat, macules, vomiting blood, hemoptysis, sore throat and mouth sores, epilepsy in children, sores, erysipelas, snake and insect bites, etc.

[0003] The traditional Indigo production process mainly includes artificial feeding of Indigo, adding water, soaking for 3-7 days for natural fermentation, manually removing the soaked Indigo, preparing lime milk and adding it to the soaking pool, passing compressed air to beat the indigo, sedimentation, releasing the supernatant, collecting the remaining concentrated slurry and drying it naturally to a paste, oven drying, crushing, bagging and other processes.

[0004] The indigo beating process is one of the more important process steps in the production of Indigo Naturalis. The indigo beating process mainly involves adding lime milk to the fermented liquor of Indigo and stirring it. The main reaction in this process is that the calcium ions in the lime milk react with the carbonate ions dissolved in the water to form a precipitate, and the active ingredients such as indigo are loaded on these precipitates to form crude indigo. In order to increase the carbonate ions in the water, in the existing indigo beating process, people usually continuously introduce air into the system.

[0005] However, the bulk density of the indigo product produced according to the above-mentioned indigo production process is as low as 0.3-0.4, resulting in insufficient dispersion and fluidity of the product, easy occurrence of pilling after screening, and poor product quality. However, there is a lack of improvements in the indigo production process for the purpose of improving bulk density in the prior art. Summary of the invention

[0006] In view of the defects in the prior art, the present invention provides an indigo beating method and an Indigo natural production method, which improves the production process of Indigo natural, increases the bulk density of the Indigo natural product produced, and improves the product quality.

[0007] The invention discloses an indigo beating method for producing indigo naturalis, which comprises adding lime milk and carbonated water into the fermented liquor of indigo plant and introducing compressed air to bead the indigo plant.

[0008] Preferably, the fermentation liquid is obtained by fermenting Indigofera oleifera and water in a feed ratio of 1kg:5-10kg.

[0009] Preferably, the weight ratio of the added amount of the lime milk to the amount of the indigo plant used for fermentation is 3-8:100, and the lime milk is prepared by mixing quicklime and water in a weight ratio of 5-8:1.

[0010] Preferably, the weight ratio of the added amount of carbonated water to the amount of blue indigo used for fermentation is 100:0.25-5, and the carbonated water is prepared by carbon dioxide and water in a volume ratio of 1:15-20.

[0011] The present invention also provides a method for producing Indigo Naturalis, comprising the following steps:

[0012] Step 1, putting indigofera oleifera into a fermentation tank, adding water, and fermenting;

[0013] Step 2: After fermentation is complete, remove the bluegrass;

[0014] Step 3, performing indigo treatment according to the above-mentioned indigo treatment method;

[0015] Step 4: precipitate, filter and dry to obtain the product.

[0016] Preferably, in step 1, the feeding ratio of indigofera oleifera and water is 1kg:5-10kg.

[0017] Preferably, in step 1, the fermentation temperature is 20-35° C. and the fermentation time is 18-36 h.

[0018] Preferably, in step 4, the dried product is further crushed and sieved to obtain an Indigo product.

[0019] The present invention also provides the indigo produced by the indigo beating method or the indigo production method.

[0020] Preferably, the bulk density of the Indigo Naturalis is 0.6-0.7.

[0021] In the present invention, carbonated water is added in the indigo beating step, which can effectively improve the bulk density of the prepared indigo product, increase the bulk density from 0.3-0.4 to 0.6-0.7, and the indigo product has good dispersibility and fluidity, does not pilling in subsequent screening processes, and improves product quality.

[0022] In addition, in the prior art, the fermentation process of Malan takes a long time. This is because the temperature of the groundwater or river water used in the early stage of fermentation is relatively low (generally 9-17°C), which affects the fermentation speed; and as the fermentation process proceeds, the temperature of the fermentation system slowly rises, exceeding the appropriate temperature range, which will cause the fermented material to leach other substances, affecting the quality of the fermented product (such as bulk density, etc.). Therefore, in the preferred process of the present invention, the fermentation process is controlled at a constant temperature, so that the fermentation time is greatly shortened, from the traditional 3-7 days to 24 hours; and it can avoid the degradation of product quality caused by excessively high fermentation temperature.

[0023] Obviously, according to the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, other various forms of modification, replacement or change may be made.

[0024] The above contents of the present invention are further described in detail below through specific implementation methods in the form of embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following examples. All technologies realized based on the above contents of the present invention belong to the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the process of Example 1 of the present invention. DETAILED DESCRIPTION

[0026] Example 1

[0027] The Indigo Naturalis production process of the present embodiment has the following steps:

[0028] (1) A grass grabber is used to feed the material frame in the underground feeding pool, and the material is weighed by the scale in the underground feeding pool and then transported to the fermentation tank by a workshop crane.

[0029] (2) The automatic water adding system adds water to the fermentation tank in a quantitative manner. The feed of indigofera and water is 1000 kg and 5000 kg respectively.

[0030] (3) The automatic constant temperature system collects the condensed water produced during the later drying process to keep the fermentation tank at a constant temperature of 20-35°C for 24 hours.

[0031] (4) After fermentation is completed, the material frame is lifted by a crane and discharged to the slag discharge area. At the same time, the loader sends the slag to the press for dehydration and then is collected and incinerated by the sanitation company.

[0032] (5) Prepare lime milk and pump it into the fermentation tank. The amount of lime added to the lime milk is 30 kg. The lime milk is prepared by mixing quicklime and water in a weight ratio of 5:1.

[0033] (6) The carbon dioxide is weighed and connected to a carbonated water generator through a bus, and drinking water is connected to the carbonated water generator to generate carbonated water; carbonated water is prepared by mixing 20 kg of carbon dioxide with 400 kg of water.

[0034] (7) Add carbonated water into the fermentation tank and use compressed air to beat the indigo. The ratio of carbonated water to indigo is 15:1.

[0035] (8) According to the color change of the liquid in the fermentation tank, when the color turns to bright black, stop beating indigo.

[0036] (9) After settling for 24 hours, the precipitated liquid is pumped through a pipeline to a plate and frame filter press for filtration; the filter cake obtained after filtration is transferred to an open oven for drying and then crushed; the dried filter cake is crushed by a multi-stage crusher, collected by a cyclone dust collector, and then sent to a screening machine for screening and then sent to a mixer for mixing through a vacuum feeder; the mixed material is fed to an automatic weighing scale through an automatic feeder for weighing, and then bagged and stored.

[0037] In the above steps, in order to prevent the materials from being contaminated and to extend the life of the equipment, all equipment in contact with the materials are made of 1Crl8Ni9Ti stainless steel.

[0038] The bulk density of the Indigo product prepared by the method of this embodiment is 0.6-0.7.

[0039] Example 2

[0040] The basic steps of this embodiment are the same as those of embodiment 1, except that the feed amount and fermentation conditions are adjusted, as follows:

[0041] In step (2), the feeding amounts of indigofera oleifera and water are 1000 kg and 10000 kg respectively.

[0042] In step (3), the fermentation time is 18 hours.

[0043] In step (5), the amount of lime in the lime milk is 80 kg, and the lime milk is prepared by mixing quicklime and water in a weight ratio of 8:1.

[0044] In step (6), carbonated water is prepared from 20 kg of carbon dioxide and 400 kg of water.

[0045] In step (7), the ratio of carbonated water to blue is 15:1.

[0046] Comparative Example 1

[0047] The production process of Indigo Naturalis in this comparative example is the same as that in Example 1, except that carbonated water is not added during the indigo beating process, but compressed air is continuously added to beat the indigo.

[0048] The bulk density of the Indigo product prepared by the method of this comparative example is 0.3-0.4.

[0049] Comparative Example 2

[0050] The production process of Indigo Naturalis in this comparative example is the same as that in Example 1, except that compressed air is not added during the indigo beating process.

[0051] In step (8), in this comparative example, since compressed air was not added during the beating process, the coal emulsion could not be well mixed with the pool liquid due to gravity. After 2 hours of beating, the pool liquid did not change significantly and remained blue-gray. Since the liquid did not change for a long time, beating was stopped.

[0052] The final product is off-white and does not meet the quality requirements of Indigo products.

[0053] Comparative Example 3

[0054] The Indigo production process of this comparative example is the same as that of Example 1, except that in step (7), the ratio of the amount of carbonated water to the amount of Indigo is 10:1.

[0055] The bulk density of the Indigo product prepared by the method of this comparative example is 0.4-0.6.

[0056] Comparative Example 4

[0057] The Indigo production process of this comparative example is the same as that of Example 1, except that in step (5), the amount of lime used to prepare lime milk is 100 kg, and the lime milk is prepared by quicklime and water in a weight ratio of 5:1.

[0058] The bulk density of the Indigo product prepared by the method of this embodiment is 0.6-0.7. However, there are many white spots in the finished Indigo product, which does not meet the property requirements of Indigo.

[0059] Through the above embodiments and comparative examples, it can be seen that the present invention improves the production process of Indigo Naturalis, adds carbonated water in the indigo beating process, and thereby improves the bulk density of the obtained Indigo Naturalis product, thereby improving the dispersibility and fluidity of the product and improving the quality of the product. Therefore, the present invention has a good application prospect.

Claims

1. A method for beating indigo for the production of Indigo Naturalis, characterized in that: It is to add lime milk and carbonated water to the fermented liquid of indigo, and introduce compressed air to make indigo. The fermentation liquid is obtained by fermenting the indigofera oleifera and water in a feed ratio of 1 kg: 5-10 L; The weight ratio of the added amount of the lime milk to the amount of the indigo plant used for fermentation is 3-8:100, and the lime milk is prepared by quicklime and water in a weight ratio of 5-8:1; The weight ratio of the added amount of carbonated water to the amount of indigo plant used for fermentation is 100:0.25-8, and the carbonated water is prepared by carbon dioxide and water in a volume ratio of 1:15-20.

2. A method for producing Indigo Naturalis, characterized in that: The steps include: Step 1, putting indigofera oleifera into a fermentation tank, adding water, and fermenting; Step 2: After fermentation is complete, remove the bluegrass; Step 3, performing indigo treatment according to the indigo treatment method of claim 1; Step 4: precipitate, filter and dry to obtain the product.

3. The method for producing Indigo Naturalis according to claim 2, wherein: In step 1, the feeding ratio of indigofera oleifera and water is 1 kg: 5-10 kg.

4. The method for producing Indigo Naturalis according to claim 2, wherein: In step 1, the fermentation temperature is 20-35°C and the fermentation time is 18-36 h.

5. The method for producing Indigo Naturalis according to claim 2, characterized in that: In step 4, the dried product is further crushed and sieved to obtain the Indigo product.

6. Indigo produced by the Indigo production method according to any one of claims 2 to 5.

7. The Indigo Naturalis according to claim 6, characterized in that: The bulk density of the Indigo Naturalis is 0.6-0.7.

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