A bamboo whole-tissue pure water physical extraction bamboo extraction stock solution and a multi-scene closed-loop application method thereof

Abstract

The application discloses a kind of bamboo whole organization pure water physical extraction bamboo extraction stock solution and its multi-scene closed loop application method, belong to natural plant extraction technical field.The application uses bamboo whole organization site as raw material, only with food-grade pure water as extraction medium, constant temperature extraction under the condition of 90 DEG C ~ 125 DEG C, 0.1 ~ 0.3 MPa;After extraction, solid-liquid separation is immediately separated under pressure in airtight, high-temperature stock solution is slowly cooled to 65 DEG C ~ 70 DEG C precision fishing melt bamboo wax, through physical way, completely eradicate the hidden danger of wax separation layering in stock solution, middle layer mother liquor is obtained after post-replacement heat, normal temperature multi-stage precision filtration stable bamboo extraction aqueous stock solution.The application is without chemical addition, without solvent residue throughout, relies on bamboo wax physical phase change characteristics to solve long-term stability problem in industry, the obtained stock solution can be safely applied to food fresh-keeping, skin mild repair, natural plant beverage preparation three big compliance scene, simultaneously realize bamboo fiber, natural bamboo wax, organic nutrient sediment, water resources and heat energy full-component closed loop high-value utilization, mature technology, high safety, can be mass-produced, and industrialization closed loop is complete.

Description

Technical Field

[0001] This invention belongs to the technical fields of natural plant bio-extraction, green daily chemical functional raw materials, natural food preservation, and natural plant beverage raw materials. Specifically, it involves a completely chemical-free, purely physical process that uses all natural parts of bamboo as raw materials. Based on the physical and chemical properties, it precisely controls the temperature to separate fat-soluble bamboo wax and water-soluble active components, preparing a multi-purpose bamboo extract that is highly stable, highly safe, and can be used simultaneously for food preservation, gentle skin repair, and the preparation of natural plant beverages. This green closed-loop production process system simultaneously achieves the high-value resource utilization of all components, including bamboo fiber, natural bamboo wax, and organic nutrient substrates. Background Technology

[0002] Bamboo is a high-quality medicinal and edible plant material with abundant reserves, a short growth cycle, and is green and renewable. The plant is rich in water-soluble, highly active functional components such as bamboo leaf flavonoids and plant polysaccharides. It has excellent properties such as anti-oxidation, antibacterial and antifungal, free radical scavenging, moisturizing and repairing, and color protection and water locking. It is an ideal natural green raw material to replace chemical preservatives, chemical skin care raw materials, and artificially formulated plant beverages. At the same time, bamboo naturally contains fat-soluble components such as bamboo wax, which have waterproof, film-forming, and hydrophobic physical properties, and has independent resource utilization value. The existing bamboo extract industry technology suffers from several key industry defects and technological biases, which severely restrict the commercialization, standardization, and large-scale implementation of the products: 1. The extraction process has significant safety shortcomings. Traditional bamboo extraction processes often use ethanol, organic solvents, and acid-base additives for extraction and purification. The finished products generally have solvent and chemical residues, making them unsuitable for direct contact with fresh ingredients, unsuitable for use in high-end daily chemical products for sensitive skin in mothers and babies, and unacceptable for use in oral plant-based beverages. This severely limits their application. 2. The material compatibility violates the physicochemical properties, resulting in extremely poor product stability. The industry has long suffered from technological bias, forcibly combining water-insoluble, fat-soluble bamboo wax with water-soluble flavonoids and bamboo polysaccharides in an aqueous solution system. Bamboo wax has a melting point of 62℃~68℃ and easily solidifies and precipitates at room temperature. Traditional processes lack precise temperature control and separation steps, resulting in the raw solution easily floating, forming films, separating, and becoming cloudy during storage, leading to extremely short shelf life. This fails to meet the stable storage and commercial requirements of three types of products: fresh produce preservation, skincare ingredients, and plant-based beverages. 3. The use of raw materials is singular, resulting in serious resource waste. Existing technologies only target the extraction of a single part or a single active component of bamboo, without covering the entire plant tissue, resulting in low raw material utilization. At the same time, most by-products such as bamboo fiber, natural bamboo wax, plant protein, amino acids, and small molecule sugars are directly discarded during the production process, failing to form a tiered high-value utilization system, thus lacking industrial economics and greenness. 4. The process design is crude, and the industrialization logic is flawed. Traditional processes generally suffer from problems such as slag settling and untimely solid-liquid separation, leading to protein and colloid sedimentation that coats the fibers, causing the material to become acidic, moldy, and deteriorate. They also lack temperature-controlled stratification processes that match the material's physical properties, resulting in incomplete bamboo wax separation. Furthermore, there is no reasonable waste heat recovery sequence, and the industrial supporting facilities are incomplete. The raw liquid is prone to fermentation and odor, has poor storage stability, and there is no mature industrial closed-loop production solution suitable for multiple application scenarios. In the current market, the fresh food preservation sector relies heavily on chemical preservatives, posing potential food safety risks; the skincare sector lacks additive-free, naturally gentle plant-based repair ingredients; and the plant-based beverage sector is mostly made with flavorings, sucrose, and additives, with additive-free, pure water-extracted, naturally sourced bamboo extract plant-based beverage ingredients being extremely scarce. All three sectors have huge market gaps and a need for industrial upgrading. Summary of the Invention

[0003] 1. Purpose of the invention The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for physical extraction of bamboo extract from bamboo tissues using pure water and its closed-loop application in multiple scenarios. This method addresses the industry pain points of traditional bamboo extraction processes, such as solvent residue, unstable extract, low resource utilization, and limited application scenarios, thereby enabling high-value utilization of all components of bamboo and commercial application in multiple scenarios. Specifically, it includes: (1) Establish a pure water and pure physical extraction system throughout the process, without adding any chemical solvents, preservatives, decolorizing agents or purification aids, and retain 100% of the natural water-soluble original active components of bamboo, achieving ultra-high safety compatibility in the three fields of food preservation, daily chemical skin care and plant beverages; (2) Breaking away from the inherent technical biases in the industry, based on the physicochemical properties of bamboo wax, a golden temperature node of 65℃~70℃ is set to separate bamboo wax in a directional manner, which completely solves the industry pain points of wax separation, deterioration and turbidity, and short shelf life of the original solution, ensuring long-term stable storage of the original solution and adapting to commercial applications in multiple scenarios. (3) Using all natural parts of bamboo as raw materials, without restrictions on bamboo species or place of origin, greatly expanding the source of raw materials and the scope of patent protection, and creating a highly versatile multi-purpose natural bamboo extract production process; (4) Supporting fiber fine processing, water resource recycling, post-processing waste heat energy recovery, and by-product resource utilization processes, constructing a green closed-loop industrialization system for bamboo materials with full structure, full components, zero waste, and low energy consumption, and realizing the value realization of multiple tracks such as food and fresh produce, cosmetics and daily chemicals, plant beverages, new material processing, and agricultural and forestry resource utilization. 2. Technical Solution To achieve the above objectives, the present invention adopts the following technical solution: A method for preparing bamboo extract by pure water physical extraction of the whole tissue of bamboo includes the following steps: (1) Raw material pretreatment: Select all parts of mature natural bamboo, including bamboo leaves, bamboo branches, bamboo stems, bamboo nodes, bamboo green, bamboo yellow, bamboo flesh, bamboo bark, and bamboo shavings. Remove impurities and purify them manually and mechanically, refine and regularize them appropriately, and air dry and shape them for later use. (2) Closed constant temperature pure water physical extraction: The pretreated bamboo raw material is mixed with food grade pure water at a weight solid-liquid ratio of 1:4 to 1:6 and put into a food grade stainless steel closed extraction reaction equipment. The mixture is extracted for 60 to 120 minutes under constant temperature and pressure conditions of 90℃ to 125℃, 0.1 to 0.3MPa and 30 to 60rpm. (3) Closed pressurized immediate solid-liquid rapid separation: After extraction, the material is discharged in a closed pressurized manner using the remaining 0.1-0.2 MPa micro pressure in the tank. The high-temperature material is then pumped into a closed solid-liquid separation device with a heat insulation layer for immediate solid-liquid rapid separation, resulting in bamboo fiber solid substrate and high-temperature crude bamboo extract at 90℃-95℃. (4) Solid phase bamboo fiber fine closed-loop treatment: After the bamboo fiber substrate is cleaned by countercurrent water and separated into solid and liquid twice, it is dried to a moisture content that can be adjusted between 2% and 12%; the cleaning wastewater is filtered and purified and then recycled. (5) High temperature raw liquid naturally slow down + precise temperature control and layered wax retrieval: 90℃~95℃ high temperature crude bamboo extract raw liquid is directly sent into a sealed heat preservation tank through heat preservation pipe, and naturally and slowly cools down and is kept at a constant temperature for 12~18 hours; when the temperature of the liquid drops to 65℃~70℃, the upper layer of all molten liquid bamboo wax is scraped and retrieved. (6) Post-heat recovery + room temperature precision filtration: After the bamboo wax separation is completed, the middle layer of clarified mother liquor is extracted, and the residual heat is recovered by the plate heat exchanger and cooled to room temperature. Then, it is purified by multi-stage physical filtration of 0.5-5μm to remove trace suspended impurities and obtain a high-stability, high-purity bamboo extract water-soluble stock solution. (7) High-value resource utilization of by-products: the upper layer of bamboo wax is used for deep processing such as daily chemical auxiliary materials and waterproof coatings; the lower layer of organic nutrient sediment is used to prepare organic nutrient solution, fermentation culture medium, etc. The resulting bamboo extract water-soluble stock solution can be applied to three compliant scenarios: food preservation, gentle skin repair, and preparation of natural plant beverages. 3. Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: (1) Absolutely safe and compliant in multiple scenarios: The entire process uses only food-grade pure water as the extraction medium, with zero chemical reagents, zero solvent residues, and zero chemical modification. The raw materials are food and medicine homologous raw materials listed by the National Health Commission. They are non-irritating, have no acute toxicity, and can be safely used in contact with food and human skin. They can also be used as raw materials for ordinary food, while meeting the highest safety access standards for food, daily chemicals, and oral beverages. (2) The system is extremely stable and completely solves the industry's persistent problems: The unique 65℃~70℃ precise temperature control phase change wax removal process completely removes wax components based on the physical characteristics of bamboo wax melting point, eliminating the problems of wax separation, floating wax, layering, turbidity and deterioration of the original liquid from the root. The original liquid is uniform and stable when stored at room temperature for a long time. (3) Strong creativity and synergistic effect: This invention retains the original complex system of flavonoids and polysaccharides, which form a significant synergistic effect. The antioxidant, preservation and maintenance effects are far superior to those of single components, which is a non-obvious technological advancement. (4) Versatile in multiple scenarios and extremely high commercial value: The single original liquid does not require secondary modification and covers three major tracks: food preservation, beauty and skin care, and herbal beverages, breaking through the limitations of single application of traditional technology. (5) Zero waste closed loop of all components, green and low carbon: realizes six-dimensional closed loop utilization of raw liquid, bamboo fiber, bamboo wax, organic nutrients, water resources and heat energy, with no solid waste, no wastewater discharge, and low energy consumption, which fully complies with the national green manufacturing and circular economy policy. (6) Extremely strong industrialization: All equipment is general standardized equipment used in the food industry, no non-standard customization is required, the process sequence is scientific, the mass production cost is controllable, and it can be quickly scaled up and replicated. Detailed Implementation Example 1 (Low Temperature, Low Parameter Process) Raw materials: All parts of natural bamboo (bamboo leaves, branches, stems, nodes, green bamboo, yellow bamboo, fleshy bamboo, bark, and shavings) Solid-liquid ratio: 1:4 Extraction temperature: 90℃ Working pressure: 0.1MPa Stirring speed: 30 rpm Extraction time: 60 min Subsequent processes: Sealed pressurized immediate solid-liquid separation → Fiber water washing + secondary solid-liquid separation → Water recycling → Fiber drying (moisture content adjustable from 2% to 12%) → 90℃ high-temperature raw solution placed in an insulated tank for natural settling for 12-18 hours → 65℃-70℃ precise temperature control for wax removal → Post-processing with residual heat exchange for cooling → 0.5-5μm precision filtration for refining at room temperature. Test results: Total flavonoids: 0.86 mg / mL, bamboo polysaccharides: 1.12 mg / mL, turbidity: 86 NTU; Appearance: The original solution is a natural light yellow-green color. The system is uniform and stable, with no waxy floating, no suspended impurities, and no stratification. Stability after 30 days of storage at room temperature: no stratification, no precipitation, no turbidity, no putrid odor, and no deterioration; Microbiological safety indicators (stored at room temperature for 30 days): total bacterial count <50 CFU / mL, mold and yeast <10 CFU / mL, no pathogenic bacteria detected; Strawberries can be kept fresh at room temperature for 4-5 days. DPPH free radical scavenging rate: 76%; The purity of the original solution meets the commercial standards for fresh food preservation, skin repair, and plant-based beverage raw materials. Example 2 (Industrial-scale optimal medium-parameter process) Solid-liquid ratio: 1:5 Extraction temperature: 110℃ Working pressure: 0.2MPa Stirring speed: 45 rpm Extraction time: 90 min The remaining procedures are completely consistent with those in Example 1. Test results: Total flavonoids: 1.25 mg / mL, bamboo polysaccharides: 1.58 mg / mL, turbidity: 125 NTU; Appearance: The original liquid has the natural color of bamboo, the system is highly uniform and stable, and there is no floating, sedimentation or stratification. Stability after 30 days of storage at room temperature: The system is homogeneous and stable, with no deterioration, odor, or precipitation; Microbiological safety indicators (stored at room temperature for 30 days): total bacterial count <50 CFU / mL, mold and yeast <10 CFU / mL, no pathogenic bacteria detected; Strawberries can be kept fresh at room temperature for 6-7 days. DPPH free radical scavenging rate: 89%; These are the optimal industrial production parameters for this invention, offering the best adaptability to multiple scenarios and the highest industrialization value. Example 3 (High Temperature and High Parameter Process) Solid-liquid ratio: 1:6 Extraction temperature: 125℃ Working pressure: 0.3MPa Stirring speed: 60 rpm Extraction time: 120 min The remaining procedures are completely consistent with those in Example 1. Test results: Total flavonoids: 1.38 mg / mL, bamboo polysaccharides: 1.65 mg / mL, turbidity: 168 NTU; Appearance: The original solution is a natural bamboo-colored dark yellow-green, the system is uniform and stable, with no suspended matter and no wax precipitation; Stability after 30 days of storage at room temperature: Overall stable, with only slight natural darkening of color, no deterioration, no separation, and no odor; Microbiological safety indicators (stored at room temperature for 30 days): total bacterial count <50 CFU / mL, mold and yeast <10 CFU / mL, no pathogenic bacteria detected; Strawberries can be kept fresh at room temperature for 5-6 days. DPPH free radical scavenging rate: 85%; The original solution meets commercial standards for multiple scenarios. Comparative Example 1: Traditional Ethanol Solvent Extraction Process The extraction process using 70% ethanol aqueous solution followed by dewaxing, decolorization and purification carries the risk of solvent residue. The bamboo wax is completely removed, the polysaccharide retention rate is low, the product has no film-forming preservation ability, it cannot come into contact with food that is ingested, and it cannot be used in the preparation of high-end skin care and beverages. The preservation time is only 2 to 3 days, and the DPPH free radical scavenging rate is 62%, which has dual defects in safety and functionality. Comparative Example 2: Industrial Pure Water Dewaxing and Purification Process After pure water extraction, high-temperature degreasing and activated carbon decolorization and purification are carried out. Bamboo wax and some active polysaccharides are lost, resulting in a significant reduction in the system's functionality. The product is prone to stratification and instability, and can only be used in low-end applications. It cannot be adapted to beverages or high-end skincare scenarios. The shelf life is only 2-3 days, and the DPPH free radical scavenging rate is 58%, resulting in low industrialization value. Comparative Example 3: High-Temperature Dry Distillation Process for Bamboo Vinegar The high-temperature carbonization and pyrolysis process almost completely destroys the active components of flavonoids and polysaccharides, resulting in a product that is highly irritating, inedible, and unsuitable for skincare. It only has a basic deodorizing effect, and its DPPH free radical scavenging rate is only 22%, making it completely unsuitable for the high-end application needs of this invention. synergistic effect verification experiment of active components Four control groups were set up to verify the synergistic effect of flavonoids and polysaccharides in this invention: Control group A (pure flavonoids 1.25 mg / mL), control group B (pure polysaccharides 1.58 mg / mL), control group C (pure water blank group), experimental group (composite stock solution of Example 2 of this invention). Experimental results: The pure flavonoid group had a preservation rate of 62% after 3 days; the pure polysaccharide group had a preservation rate of 28% after 2 days; and the control group had no preservation effect. The experimental group's compound stock solution maintained freshness for 6-7 days with a clearance rate of 89%. This study fully demonstrates that bamboo leaf flavonoids and bamboo polysaccharides have a significant synergistic effect, and the functional effect of the composite system far exceeds that of the single component, demonstrating a non-obvious inventiveness. Safety Statement All raw materials used in this invention are bamboo, a material considered both food and medicine in China. The entire process involves physical extraction with pure water, with no chemical additives, solvent residues, or irritating components. The original solution undergoes high-temperature closed extraction, aseptic pipeline transportation, and multi-stage precision filtration, resulting in excellent microbiological indicators. It can be stored stably for a long time without preservatives, exhibits no acute toxicity or cell irritation, and is fully suitable for three high-safety scenarios: human contact, food contact, and oral food ingredients. Summary of Implementation Examples This invention utilizes whole bamboo material as raw material, pure physical precise temperature-controlled phase change separation, and industrial closed-loop supporting processes to prepare bamboo extract liquid that is superior to existing technologies in terms of stability, safety, and functionality. It completely solves the core pain points in the industry such as wax separation, spoilage, safety residues, and resource waste. The process parameters are scientific and reasonable, the data is self-consistent and rigorous, the mass production is strong, the adaptability to multiple scenarios is outstanding, and the industrial closed loop is complete, demonstrating outstanding substantive features and significant progress.

Claims

1. A method for preparing bamboo extract by pure water physical extraction of the entire bamboo tissue, characterized in that, The process includes the following steps: Selecting natural bamboo whole tissue raw materials, including bamboo leaves, bamboo branches, bamboo stems, bamboo nodes, bamboo green, bamboo yellow, bamboo flesh, bamboo bark, and bamboo shavings; mixing the raw materials with food-grade purified water at a weight solid-liquid ratio of 1:4 to 1:6, and adding them to a closed extraction device; performing constant-temperature physical extraction for 60 to 120 minutes at a temperature of 90℃ to 125℃, a pressure of 0.1 to 0.3 MPa, and a stirring speed of 30 to 600 rpm; after extraction, using the residual micro-pressure in the tank for closed pressurized discharge, and pressing the high-temperature material into a closed solid-liquid separation device with a heat insulation layer for immediate and rapid solid-liquid separation, obtaining bamboo fiber solid phase substrate and high-temperature crude bamboo extract at 90℃ to 95℃; after the bamboo fiber solid phase substrate is washed with water in a countercurrent manner, it undergoes a second solid-liquid separation, and the bamboo fiber obtained from the second separation is sent to... In the drying process, the cleaning wastewater generated during the secondary separation is purified and recycled. The crude bamboo extract stock solution at 90℃~95℃ is directly sent into a sealed insulated settling tank through an insulated pipe, where it is naturally and slowly cooled and kept at a constant temperature for 12~18 hours. When the temperature of the liquid drops to 65℃~70℃, all the molten bamboo wax on the upper layer is scraped off to complete the solid-liquid directional separation. After the bamboo wax is separated, the clear mother liquor containing bamboo leaf flavonoids and bamboo polysaccharides in the middle layer is extracted. The mother liquor is then passed through a plate heat exchanger to recover residual heat and cool down to room temperature. It is then purified by multi-stage physical filtration of 0.5~5μm to obtain a highly stable bamboo extract aqueous solution stock solution. The entire preparation process uses only food-grade pure water as the sole extraction medium and does not add any chemical excipients. The bamboo wax components are physically removed through precise temperature nodes, leaving only water-soluble bamboo leaf flavonoids and bamboo polysaccharide active substances.

2. The preparation method according to claim 1, characterized in that: After secondary separation and drying, the bamboo fiber has a moisture content that can be precisely controlled within the range of 2% to 12%, and can be used to prepare bamboo-plastic pallets, logistics turnover boards, bamboo-based composite materials, battery negative electrode carbon precursor materials, energy storage carbon precursor materials, supercapacitor carbon precursor materials, and activated carbon precursor materials.

3. The preparation method according to claim 1, characterized in that: Using a fixed temperature range of 65℃ to 70℃ for directional wax retrieval, the bamboo wax is completely melted into sheets with a clear interface within this temperature range, allowing for complete separation of wax components and completely eliminating wax separation and turbidity in the later stages of the original solution.

4. The preparation method according to claim 1, characterized in that: The upper layer of natural bamboo wax obtained by static separation is used for the deep processing of daily chemical auxiliary materials, plant polishing aids, and waterproof coating raw materials.

5. The preparation method according to claim 1, characterized in that: The lower layer of organic nutrient sediment obtained by static stratification is rich in plant protein, amino acids, and small molecule sugars, and can be used to prepare organic foliar nutrient solution, microbial fermentation culture medium, and raw material for enhancing the efficacy of bio-organic fertilizer.

6. The preparation method according to claim 1, characterized in that: Wastewater generated from bamboo fiber cleaning is physically filtered and purified to remove impurities, and then recycled for production replenishment and equipment cleaning, achieving environmentally friendly recycling of water resources.

7. The preparation method according to claim 1, characterized in that: The waste heat recovered during the mother liquor heat exchange and cooling process is used to preheat production water and bamboo fiber cleaning water, realizing the energy-saving utilization of heat energy through recycling.

8. The preparation method according to claim 1, characterized in that: The prepared bamboo extract aqueous solution can be directly applied to the field of food preservation to prepare natural preservation products for fruits, vegetables, meat, and aquatic products.

9. The preparation method according to claim 1, characterized in that: The prepared bamboo extract aqueous solution can be directly applied to the daily chemical skin care field to prepare skin care products for skin hydration, soothing and repair, and sensitive skin care.

10. The preparation method according to claim 1, characterized in that: The prepared bamboo extract aqueous solution can be used as a natural plant raw material in the general food industry to prepare plant beverages, herbal beverages, solid beverages, and plant oral liquids.

11. The preparation method according to claim 1, characterized in that: The production water meets the GB 5749-2022 standard, and all product indicators simultaneously meet the national standards for food preservation, cosmetic raw materials, and medicinal and edible plant beverage raw materials.

12. A bamboo extract stock solution from whole tissues of bamboo, characterized in that: Prepared by the preparation method according to any one of claims 1-11, the stock solution contains only water-soluble active components such as bamboo leaf flavonoids and bamboo polysaccharides, with no wax residue, no layering, no flocculation or off-odor, and the system is uniform and stable; it can be directly contacted with food ingredients, human skin, and used as a common food ingredient.