High-solid-content plant-derived fulvic acid produced by using humulus lupulus and production process of high-solid-content plant-derived fulvic acid

Abstract

The invention belongs to the fields of biochemical engineering, straw resource comprehensive utilization, three-element separation and synthetic biological fermentation engineering and biomass energy, and discloses high-solid-content plant-derived fulvic acid produced by using humulus lupulus and a production process. The invention discloses a production process of plant-derived fulvic acid, which comprises the following steps: adding a core additive containing humulus lupulus, and mixing with ammonium sulfite to obtain a cooking liquid medicine; and mixing the raw materials with the cooking liquid medicine, cooking, extracting, separating and concentrating to obtain the fulvic acid product concentrated black liquor with high solid content. According to the method, the solid content or dry content of the plant-derived fulvic acid can be increased, the solid content of the existing similar product fulvic acid in the market is higher, the detection value is generally 47-57%, and according to the technical scheme provided by the invention, the solid content of the plant-derived fulvic acid exceeds 75%, and the increase amplitude exceeds 40%.

Description

Technical Field

[0001] The invention belongs to the fields of biochemical engineering, comprehensive utilization of straw resources, three-element separation and synthetic biological fermentation engineering and biomass energy, and relates to a plant-derived fulvic acid product and a production process of the plant-derived fulvic acid. Background Art

[0002] Hops ( Humulus lupulus L. ), is a perennial climbing herb of the genus Humulus in the Cannabaceae family, distributed in Europe, northern and northeastern Asia, eastern America and other regions. There are wild germplasm resources in northern Xinjiang, China, and it is now cultivated in many parts of China. The immature flowering fruit spikes of hops can be used as medicine. It tastes bitter, slightly cool, and non-toxic; it has the effects of strengthening the stomach and digestion, diuresis and calming the nerves. It is mainly used to treat indigestion, abdominal distension, edema, cystitis, tuberculosis, cough, insomnia, leprosy and other diseases. In addition, hops can not only be used to brew beer, but also is a good fermentation agent with important economic uses.

[0003] Fulvic acid is considered to be a plant growth activator and is one of the humic acids with a smaller molecular weight. Humic acid-based organic materials include water-soluble humic acid materials and water-insoluble humic acid materials. Water-soluble humic acid materials include water-soluble plant-derived sulfonated humic acid, water-soluble plant-derived biochemical humic acid and water-soluble mineral-derived humic acid: plant-derived sulfonated humic acid is a water-soluble low molecular weight humic acid obtained by sulfonation treatment of agricultural, forestry and fruit waste including straw; straw-derived biochemical humic acid is a water-soluble humic acid obtained by fermentation of straw with biological agents; mineral-derived humic acid refers to a water-soluble low molecular weight water-soluble humic acid extracted by physical, chemical and biological methods using peat soil, lignite and weathered coal as raw materials, with an average molecular weight of 50-100.

[0004] At present, there are four main methods for preparing fulvic acid: extraction, fermentation, electrodialysis and extraction. The extraction method includes acid extraction, alkali extraction, acid-organic solvent extraction and ion exchange resin method. The main method for obtaining fulvic acid from weathered coal, lignite, peat, etc. is extraction. The typical product representative is mineral potassium humate. The main problem is that the pH is too high, generally pH 9-11. The fermentation method mainly uses some industrial and agricultural waste materials, sawdust, etc., and adds appropriate amounts of nutrients such as nitrogen, phosphorus and potassium. First, the fermentation material rich in fulvic acid is obtained by biological fermentation technology, and then the product rich in fulvic acid is extracted from the fermentation material by leaching. The typical product representative of the fermentation method is bagasse molasses and yeast molasses fulvic acid. The main problem is the high salt content. The salt content of some products is detected to be 60%. Electrodialysis is a deep purification method, which is generally used for further processing and purification of fulvic acid primary products. Electrodialysis is generally used for further processing and purification of fulvic acid primary products. The limitation is that the production and application scale is small. The extraction method uses ammonium sulfite as an auxiliary agent to obtain plant-derived fulvic acid and cellulose pulp through cooking extraction. The common limitation of the above methods is the low solid content, which is generally 40%-60%.

[0005] The invention with publication number CN 108772418 A discloses a synchronous passivation agent for cadmium and arsenic in paddy soil. The passivation agent has a three-layer structure from the inside to the outside, wherein the innermost layer is a hydrogen ion chemical consumption agent, the middle layer is a reaction accelerator humus-like substance, and the outermost layer is a mineralization precursor; the hydrogen ion chemical consumption agent is nitrate and peroxide; the reaction accelerator humus-like substance is one or more of peat soil, humic acid, fulvic acid, humin, fulvic acid, palmitic acid, and black humic acid; the mineralization precursor is a reducing iron powder, ferrous salt and / or solid ferrous mineral. The three-layer membrane structure of the synchronous passivation agent for cadmium and arsenic of the invention can be slowly released into the soil to fully synergistically exert its efficacy and effectively reduce the heavy metal cadmium and arsenic content of rice. The patent with publication number CN 114044717 A includes the following steps: 1) crushing and dissolving inorganic raw materials: crushing the proportioned solid raw materials including urea, monoammonium phosphate, potassium tripolyphosphate, diammonium phosphate, and boric acid through a raw material crushing device, placing them in a reactor, and adding proportioned soft water for dissolving; 2) dissolving auxiliary materials: adding fish protein powder, seaweed extract, potassium humate, NAM inhibitor, and phosphorus activator into the reactor for dissolving; 3) mixing and stirring; 4) subcontracting; 5) packaging to obtain a liquid fertilizer for cotton.

[0006] The invention of publication number CN105503475A discloses a microcapsule-encapsulated amino acid liquid mineral fertilizer, which uses sodium hydroxide aqueous solution as a raw material and is obtained by producing liquid fertilizer and solid fertilizer and microencapsulating them to obtain a finished product.

[0007] The fulvic acid prepared by the above method has a wide range of uses in agriculture, animal husbandry and other fields due to its good nutritional value, natural environmental performance and low cost. For example, fulvic acid straw plant fiber can be made into degradable mulch film (CN112239960 A), glue-free and formaldehyde-free fiberboard (CN 112025906 A), cotton straw molded lunch boxes (CN 112127194 A), non-wood fiber pulping and papermaking (CN 108179650 A), and high-strength corrugated paper pulp (CN 111996827 A).

[0008] However, the key difficulty in using plant-derived fulvic acid as a renewable biochemical raw material is how to separate its solid content (mainly cellulose, hemicellulose and lignin) with high quality to obtain raw materials for large-scale utilization for downstream conversion. As the most valuable renewable carbon resource, if the three lignins of lignocellulose cannot be fully utilized, it will limit the economic and environmental friendliness of the development of biomass chemical industry. Therefore, how to increase the solid content of plant-derived fulvic acid and increase its application value is an important topic in this field. Summary of the invention

[0009] The technical problem to be solved by the present invention is to increase the solid base content of fulvic acid, that is, the content of fulvic acid in a dry state, when producing fulvic acid products using plant raw materials using the sulfite method, so as to break through the bottleneck and exceed 55% or even exceed 60%.

[0010] The increase of fulvic acid solid base content can increase the efficacy of fulvic acid under the same unit weight or unit volume, improve the effective yield of fulvic acid, and reduce the production cost of fulvic acid from plant raw materials. There have been many reports on the production of fulvic acid using related raw materials. The patent with announcement number CN 208308727 U discloses a fulvic acid potassium phosphite ammonium phosphate solid composite fertilizer preparation system, which can generate fulvic acid potassium phosphite ammonium phosphate solid composite fertilizer by granulating and mixing potassium phosphite solution, ammonium phosphate solution and fulvic acid potassium solution. The patent application with publication number CN 102328963 A discloses the preparation of a black crystal aquaculture synergist containing fulvic acid using weathered coal and sodium hydroxide as raw materials: the weathered coal is extracted with a sodium hydroxide solution under heating conditions, filtered to obtain a soy sauce-colored solution containing free humic acid, the soy sauce-colored solution is then acidified with a hydrochloric acid solution, filtered to obtain a fulvic acid solution, sodium hydroxide is then added to the fulvic acid solution and reacted under heating conditions, and the generated solid is dried, crushed, and sieved to obtain a black crystal aquaculture synergist.

[0011] The difficulty in the process of plant-derived fulvic acid is to find the right core additive to increase the solid content of fulvic acid. The solid content of fulvic acid on the market is generally 40-60%, of which the estimated content of mineral-derived fulvic acid (potassium) is 55%; plant-derived fulvic acid - the highest is 60%, generally 43%; molasses fulvic acid - the highest value is 60%, and there has been no report of plant-derived fulvic acid with a solid content of more than 61%.

[0012] In order to solve the technical bottleneck in production practice, the present invention proposes a high solid base content plant source fulvic acid and a production process produced by using hops, and the production process comprises: S1, obtain raw materials; S2, obtain the core auxiliary agent SYS (also called core medicine, medicine SYS, etc.); S3, mixing the core additive SYS with liquid ammonium sulfite (i.e. ammonium sulfite) or solid ammonium sulfite dissolved in water to form a cooking liquid; S4, after the raw material is mixed with the cooking liquid, cooking extraction, separation and concentration are sequentially completed to obtain a concentrated black liquid of fulvic acid with a high solid content.

[0013] Preferably, the neutral sulfite method is used for cooking, pH 6-9, using a buffer without Na ions to obtain fiber and raw material cooking liquid; cooking at 160-180°C and keeping warm for 30-120 minutes. More preferably, the cooking temperature is 160-173°C and the keeping warm time is 40-110 minutes.

[0014] Preferably, the order of adding the raw materials and the core additives etc. is as follows: first dissolve the core additive in water, then add the ammonium sulfite solid or liquid into the digester simultaneously with the raw materials, and then add the liquid to the pot according to the set liquid ratio.

[0015] Preferably, the temperature is raised and kept warm according to the ammonium sulfite pulping process. The cooking temperature and the keeping time are set according to the raw materials and the target pulp performance requirements.

[0016] Preferably, the total amount of the core additive SYS is 0.1%-10% by weight of the raw material, preferably 0.5%-5%, by mass percent.

[0017] The core additive SYS includes hops and magnesium sulfate, etc. Preferably, the core additive also includes taurine. More preferably, the core additive SYS includes hops, taurine, salicylic acid and magnesium sulfate. For example, the core additive contains hops plus magnesium sulfate, or hops plus taurine plus magnesium sulfate, or hops plus salicylic acid plus magnesium sulfate, or taurine plus salicylic acid plus magnesium sulfate, or hops plus taurine plus salicylic acid plus magnesium sulfate. Hops, taurine, salicylic acid, magnesium sulfate, etc. are all commercially available, and the added amount is the percentage of the dry weight of the raw materials. Among them, the amount of hops added is not less than 0.1%, the amount of taurine added is not less than 0.1%, the amount of salicylic acid added is not less than 0.1%, and the magnesium sulfate is 0.2%-10%.

[0018] Salicylic acid itself is a plant growth regulator, which has the effects of increasing crop growth, increasing yield, inhibiting the natural aging and life of crops, improving stress resistance, and enhancing the rooting ability of crops. Preferably, the amount of salicylic acid in the core auxiliary agent SYS is 0.1%-3% of the weight of the raw material, preferably 1%-2%. The amount of hops is not less than 0.1% of the raw material, preferably 0.5%-5%, and more preferably 1%-2%. Taurine is a plant growth regulator, which has the effects of increasing crop growth, increasing yield, inhibiting the natural aging of crops, extending the life of crops, improving stress resistance, and enhancing the rooting ability of crops. In the core agent of the present invention, the weight of taurine is not less than 0.1% of the raw material, preferably not less than 0.5% of the raw material, for example 0.5%-5%, more preferably 0.5%-3%, mass percentage.

[0019] Using the production process of the present invention, the solid content of humic acid after concentration in the obtained product reaches more than 55%. Preferably, the solid content of humic acid after concentration reaches more than 60%, and more preferably, the solid content of humic acid can reach 60-75%. The solid content of humic acid on the market is currently less than 50%, and the present invention can greatly improve the application value and use efficiency of the product. The test of the present invention shows that compared with humic acid with a higher solid content on the market (humic acid solid content below 50%), the use of humic acid with a high solid content significantly enhances the development of wheat root system, which is manifested as strong rhizomes, white roots and vigorous vitality. When a product with a humic acid solid content greater than 70% is applied to wheat, the average length of the wheat root system after 20 days is nearly 3 times that of the humic acid with a higher solid content on the market.

[0020] After adding the core auxiliary agent SYS, the plant-derived fulvic acid product produced retains the ingredients of hops. Preferably, the plant-derived fulvic acid product produced by this technical solution contains fulvic acid, ammonium sulfate, ammonium sulfite (sulfite) and hops, etc.

[0021] The plant-derived fulvic acid of the present invention is a low-molecular-weight fulvic acid obtained by sulfonation of non-wood fiber biomass fiber raw materials, and its indicators are: fulvic acid>60%, preferably fulvic acid content greater than 75%, organic matter content 50-70%, humic acid content 60-70%, humic acid 0.2%-0.36%, average molecular weight <50, molecular weight <180 accounted for>95%, pH 4-6. In the present invention, the detection method of SYS components in fulvic acid adopts NMR, MS, HPLC, etc., and the detection standard refers to HG / T 5332-2018 "Humic Acid Biological Organic Fertilizer".

[0022] In the description of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. It should be noted that, in this article, relational terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0023] The beneficial effects of the present invention are as follows: 1. Significantly increase the solid content of plant-derived fulvic acid from 40%-53% to 56%-75% or even above 75%, with the lowest increase exceeding 40%. This is much higher than the common fulvic acid products on the market, including mineral fulvic acid (fulvic acid solid content 55%), molasses fulvic acid (fulvic acid solid content 60%), and similar plant-derived fulvic acid (fulvic acid solid content up to 53%).

[0024] 2. The increase in the solid base content of humic acid increases the effective content of humic acid per unit weight or unit volume, reduces transportation costs, improves the feasibility of fertilizer substitution, and can effectively promote fertilizer saving and efficiency improvement.

[0025] 3. The production efficiency of plant-based humic acid has been improved, with a high marginal rate of return, which greatly improves production efficiency and carbon emission effects.

[0026] 4. Fulvic acid contains hops and salicylic acid, which greatly enhances the comprehensive function of the plant source and forms a functional superposition of fulvic acid, hops and salicylic acid.

[0027] 5. A number of core auxiliary components such as hops, taurine, salicylic acid, etc. that can increase the solid base content of plant-derived fulvic acid have been found, providing a wider range of choices for large-scale industrial production. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] A complete production process of high solid content plant-derived fulvic acid is as follows: (1) Raw materials: Hegang corn cob xylose residue is used as raw material.

[0031] (2) Preparation: SYS liquid preparation, dosage: 0.5% magnesium sulfate, 2% hops, both solid, calculated by raw material mass; dilute the core additive at a ratio of 1:10-30 and set aside; The amount of solid ammonium sulfite used is 30%, calculated based on the mass of raw materials.

[0032] (3) Cooking method: intermittent ball steaming.

[0033] (4) Loading the pot: When solid ammonium sulfite is used, the raw material, ammonium sulfite and SYS solution are added and transported along the conveyor belt in proportion.

[0034] When liquid ammonium sulfite is used, the SYS solution and the liquid ammonium sulfite are first mixed to form a mixed solution, and then the mixed solution and the raw materials are added and transported according to a proportion.

[0035] If liquid ammonium sulfide with a solid content of 30% is used, the amount of water added is (1+0.002+0.002+0.002+0.3)×3.5-0.7=3.8 tons.

[0036] (5) Steaming: Heat to 170°C and keep warm for 70 minutes.

[0037] (6) Spraying.

[0038] (7) Solid-liquid separation. Solid-liquid separation is carried out by conventional means. In this scheme, a screw squeezer is used to separate straw cellulose and fulvic acid black liquor, and four-stage reverse washing is used to obtain fulvic acid dilute black liquor and cellulose coarse pulp.

[0039] (8) Concentration of fulvic acid black liquor. The dilute fulvic acid black liquor is concentrated by multi-effect evaporation to obtain commercial fulvic acid concentrated black liquor.

[0040] (9) Drying. The commercial humic acid concentrated black liquid is spray-dried to obtain humic acid dry powder.

[0041] (10) Test results. The samples were sent to the Taiyuan Testing Center of the China Humic Acid Testing Industry Association for testing. The test results are shown in Table 1. Among them, fulvic acid (dry basis) was 71.4%.

[0042] Table 1 Test results of Example 1

[0043] Solid base content = (weight of fulvic acid (FA) / total weight of plant-based fulvic acid (dry basis))%, mass percentage.

[0044] The above results show that the production process of the present invention can obtain a fulvic acid product with a high fulvic acid solid base content.

[0045] Example 2

[0046] (1) Raw materials: bamboo chips.

[0047] (2) The production process is the same as in Example 1, except that 20% of imine is added.

[0048] (3) Core additive formula: magnesium sulfate 0.5%, hops 1%.

[0049] (4) Test results: See Table 2. Among them, fulvic acid (dry basis) 68.6% Table 2 Test results of Example 2

[0050] The above results show that the production process of the present invention can also obtain a fulvic acid product with a high fulvic acid solid base content using bamboo chips as raw materials.

[0051] Example 3 (1) Raw materials: bamboo blocks.

[0052] (2) Production process: same as in Example 1.

[0053] (3) Core additive formula: hops 1.0%, magnesium sulfate 1.0%.

[0054] (4) Test results: The solid content of fulvic acid is 74.7%.

[0055] The above results show that the production process of the present invention can also obtain a fulvic acid product with a high fulvic acid solid content using bamboo blocks as raw materials.

[0056] Example 4 (1) Raw material: reed.

[0057] (2) Production process: same as in Example 1.

[0058] (3) Core additive formula: hops 1.0%, magnesium sulfate 1.5%.

[0059] (4) Test results: The solid content of fulvic acid is 71.3%.

[0060] The above results show that the production process of the present invention can also obtain a fulvic acid product with a high fulvic acid solid base content using reed as raw material.

[0061] Example 5 (1) Raw material: lignin sludge.

[0062] (2) Production process: same as in Example 1.

[0063] (3) Core additive formula: 0.5% hops, 1.0% salicylic acid, 0.5% magnesium sulfate.

[0064] (4) Test results: The solid content of fulvic acid is 71.4%.

[0065] The above results show that the production process of the present invention can also obtain a fulvic acid product with a high fulvic acid solid base content by using lignin sludge as raw material.

[0066] Example 6 (1) Raw materials: bamboo powder.

[0067] (2) Production process: same as in Example 1, except that the amount of imine is 20%.

[0068] (3) Core additive formula: 0.5% hops, 0.5% salicylic acid, and 0.5% magnesium sulfate.

[0069] (4) Test results: The solid content of fulvic acid is 57.0%.

[0070] The above results indicate that the dry basis content of humic acid obtained by simultaneously containing salicylic acid and 0.5% hops in the core agent is not as good as that of the same dose of salicylic acid, nor as good as that obtained by using hops alone.

[0071] Example 7 (1) Raw materials: bamboo powder.

[0072] (2) Production process: same as in Example 1.

[0073] (3) Core additive formula: 0.5% hops, 1.0% salicylic acid, 0.5% magnesium sulfate.

[0074] (4) Test results: The solid content of fulvic acid is 65.1%.

[0075] The above results indicate that the dry basis content of fulvic acid obtained when the core agent contains 1.0% salicylic acid and 0.5% hops is not as good as that of the same dose of salicylic acid or hops.

[0076] Example 8 (1) Raw materials: bamboo powder.

[0077] (2) Production process: same as in Example 1.

[0078] (3) Core additive formula: hops 1.0%, salicylic acid 1.0%, magnesium sulfate 0.5%.

[0079] (4) Test results: The solid content of fulvic acid is 68.4%.

[0080] The above results indicate that the dry basis content of fulvic acid obtained when the core agent contains both 1.0% salicylic acid and 1.0% hops is not as high as that of salicylic acid at the same dose.

[0081] Example 9 (1) Raw materials: bamboo powder.

[0082] (2) Production process: same as in Example 1.

[0083] (3) Core additive formula: 0.5% hops, 2% salicylic acid, and 0.5% magnesium sulfate.

[0084] (4) Test results: The solid content of fulvic acid is 69.7%.

[0085] The above results indicate that the dry basis content of fulvic acid obtained by simultaneously containing 2.0% salicylic acid and 0.5% hops in the core agent is not as good as that of salicylic acid at the same dose.

[0086] Example 10 (1) Raw materials: bamboo powder.

[0087] (2) Production process: same as in Example 1.

[0088] (3) Core additive formula: hops 1.0%, salicylic acid 2%, magnesium sulfate 0.5%.

[0089] (4) Test results: The solid content of fulvic acid is 72.3%.

[0090] The above results indicate that the dry basis content of fulvic acid obtained by simultaneously containing 2.0% salicylic acid and 1.0% hops in the core agent is not as good as that of salicylic acid at the same dose.

[0091] Embodiment 11 (1) Raw materials: bamboo powder.

[0092] (2) Production process: same as in Example 1.

[0093] (3) Core additive formula: 0.5% hops, 3.0% salicylic acid, and 0.5% magnesium sulfate.

[0094] (4) Test results: The solid content of fulvic acid is 70.0%.

[0095] The above results show that the salicylic acid content in the core agent is further increased, the antagonistic effect between salicylic acid and hops is weakened, and the dry basis content of the obtained humic acid is significantly improved compared with Example 7.

[0096] Example 12 (1) Raw materials: bamboo powder.

[0097] (2) Production process: same as in Example 1.

[0098] (3) Core additive formula: hops 1.0%, salicylic acid 3.0%, magnesium sulfate 0.5%.

[0099] (4) Test results: The solid content of fulvic acid is 75.8%.

[0100] The above results show that the antagonistic effect of salicylic acid and hops is weakened when the salicylic acid content in the core agent is further increased, and the dry basis content of fulvic acid is significantly improved.

[0101] Example 13 Comparative Test (Comparison with Example 1) (1) Raw materials: Take Hegang corn cob xylose residue as an example.

[0102] (2) Preparation: Prepare SYS solution according to the predetermined dosage, for example: 2% acetic acid, 0.5% magnesium sulfate, both solid, calculated by the mass of raw materials. Dilute the agent with clean water at a volume ratio of 1:10-30 and set aside.

[0103] The amount of solid ammonium sulfite (which may be referred to as ammonium sulfite for short) used is 30%, calculated based on the mass of the raw materials.

[0104] (3) Cooking method: intermittent ball steaming.

[0105] (4) Loading the pot: When solid ammonium sulfite is used, the raw material, ammonium sulfite and SYS solution are added and transported along the conveyor belt in proportion.

[0106] When liquid ammonium sulfite is used, the SYS solution and the liquid ammonium sulfite are first mixed to form a mixed solution, and then the mixed solution and the raw materials are added and transported according to a proportion.

[0107] If liquid ammonium sulfide with a solid content of 30% is used, the amount of water added is (1+0.002+0.002+0.002+0.3)×3.5-0.7=3.8 tons.

[0108] (5) Steaming: Heat to 170°C and keep warm for 70 minutes.

[0109] (6) Spraying.

[0110] (7) Solid-liquid separation. Solid-liquid separation is carried out by conventional means. In this scheme, a screw squeezer is used to separate straw cellulose and fulvic acid black liquor, and four-stage reverse washing is used to obtain fulvic acid dilute black liquor and cellulose coarse pulp.

[0111] (8) Concentration of fulvic acid black liquor. The dilute fulvic acid black liquor is concentrated by multi-effect evaporation to obtain commercial fulvic acid concentrated black liquor.

[0112] (9) Drying. The concentrated black liquor of fulvic acid is spray-dried to obtain fulvic acid dry powder.

[0113] (10) Test results. See Table 3.

[0114] Detection indicators: fulvic acid (dry basis) 51.1%.

[0115] Table 3 Comparison of test data of Example 1 and Example 13

[0116] The results of the comparative example show that although both acetic acid and hops can be used to produce fulvic acid products, the dry basis content of the fulvic acid obtained is also relatively high. However, after the same amount of acetic acid is added, the fulvic acid solid base content obtained is 51.1%, while after the hops selected by the present invention are added, the fulvic acid solid base content obtained is 71.4%, and the increase ratio reaches 40%. Whether the high solid base fulvic acid product is used for fertilizer, improving soil texture or other purposes, it has higher efficiency and lower cost than existing fulvic acid products.

[0117] Embodiment 14 (1) Raw materials: bamboo powder.

[0118] (2) Production process: same as in Example 1.

[0119] (3) Core additive formula: 0.5% hops, 0.5% taurine, and 0.5% magnesium sulfate.

[0120] (4) Test results: The solid content of fulvic acid is 68.5%.

[0121] The above results show that the core agent contains 0.5% hops and 0.5% taurine at the same time, and the dry basis content of fulvic acid obtained is significantly improved.

[0122] Embodiment 15 (1) Raw materials: bamboo powder.

[0123] (2) Production process: same as in Example 1.

[0124] (3) Core additive formula: 0.5% hops, 1.0% taurine, 0.5% magnesium sulfate.

[0125] (4) Test results: The solid content of fulvic acid is 72.7%.

[0126] The above results show that the core agent contains 0.5% hops and 1.0% taurine at the same time, and the dry basis content of humic acid is significantly improved. The combination of hops and taurine can jointly promote the increase of the solid basis content of humic acid.

[0127] Example 16 (1) Raw materials: bamboo powder.

[0128] (2) Production process: same as in Example 1.

[0129] (3) Core additive formula: hops 1.0%, taurine 0.5%, magnesium sulfate 0.5%.

[0130] (4) Test results: The solid content of fulvic acid is 71.6%.

[0131] The above results show that the core agent contains 1.0% hops and 0.5% taurine at the same time, and the dry basis content of fulvic acid obtained is significantly increased compared with when no hops or taurine is added.

[0132] Embodiment 17 (1) Raw materials: bamboo powder.

[0133] (2) Production process: same as in Example 1.

[0134] (3) Core additive formula: hops 1.0%, taurine 1.0%, magnesium sulfate 0.5%.

[0135] (4) Test results: The solid content of fulvic acid is 72.7%.

[0136] The above results show that the core agent contains 1.0% hops and 1.0% taurine at the same time, and the dry basis content of fulvic acid obtained is significantly increased compared with when no hops or taurine is added.

[0137] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A plant-derived fulvic acid with high solid content produced by hops and a production process, characterized in that: The production process comprises: S1, obtain raw materials; S2, obtain the core additive SYS; S3, mixing the core additive SYS with ammonium sulfite as a cooking liquid; S4, after mixing the raw material with the cooking liquid, sequentially complete cooking, extraction, separation, and concentration to obtain a concentrated black liquor of fulvic acid with a high solid content; The high solid content plant-derived fulvic acid product refers to a plant-derived fulvic acid product in which the fulvic acid solid content is not less than 55%; The core additive SYS includes hops and magnesium sulfate. The amount of hops added is not less than 0.1% of the weight of the raw materials, and the amount of magnesium sulfate added is 0.2%-10%.

2. The production process according to claim 1, characterized in that: The neutral sulfite method is used for cooking, pH 6-9, and a sodium ion-free buffer is used to obtain fiber and raw material cooking liquid; cooking at 160-180°C and keeping warm for 30-120 minutes; in, The dosage of core additive SYS is not less than 0.5% of the raw material weight; The dosage of ammonium sulfite is 15%-35% of the weight of the raw material, by mass percentage.

3. The production process according to claim 1, characterized in that: The dosage of core additive SYS is 1%-10% of the raw material weight; The amount of hops in the core additive SYS is not less than 0.5% of the weight of the raw materials; The dosage of magnesium sulfate is 0.5%-5%, by mass percent.

4. The production process according to claim 2, characterized in that: The dosage of core additive SYS is 3%-5% of the raw material weight; The amount of hops in the core additive SYS is not less than 1% of the weight of the raw materials; The dosage of magnesium sulfate is 0.5%-2%, mass percentage; The cooking temperature range is 160-173°C.

5. The production process according to claim 1, characterized in that: The core additive also includes salicylic acid, and the amount of salicylic acid added is not less than 2% of the weight of the raw material; The dosage of hops is 1%-2% of the raw material weight; The amount of magnesium sulfate added is 0.2%-5% of the weight of the raw material; The amount of ammonium sulfite added is 15%-35% of the weight of the raw material, by mass percentage.

6. The production process according to claim 1, characterized in that: The core additive also includes taurine, and the amount of taurine added is not less than 0.1% of the weight of the raw material; The amount of hops added is 0.5%-5% of the weight of the raw materials; The amount of magnesium sulfate added is 0.5%-2% of the weight of the raw material; The amount of ammonium sulfite added is 20%-30% of the weight of the raw material; mass percentage.

7. A core auxiliary agent for the production process of plant-derived fulvic acid with high solid content, characterized in that: The core additive SYS contains hops and magnesium sulfate. The amount of hops added is not less than 0.1% of the weight of the raw materials, and the amount of magnesium sulfate added is 0.2%-10%, by mass percentage.

8. The application of the high solid base content plant-derived fulvic acid produced by using hops and the production process as claimed in claim 1, characterized in that: A plant-derived fulvic acid product with a high solid content is produced, wherein the solid content of the plant-derived fulvic acid product with a high solid content reaches more than 55% by mass.

9. The use according to claim 8, characterized in that: The weight of hops in the core additive SYS is 0.5%-5% of the raw material, and the solid content of the high solid content plant-derived fulvic acid product produced reaches more than 60% by mass percentage; The plant-derived fulvic acid product with a high solid base content is used as a land conditioner or fertilizer to enhance the root and stem development of crops.

10. The product obtained by the plant-derived fulvic acid with high solid content and the production process produced by hops according to claim 1, characterized in that: The pH value of the humic acid stock solution obtained after concentration is 5-6, and the solid base content is not less than 55% by mass.

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