Preparation method of double-layer ceramic filter membrane for separation and refining of traditional Chinese medicine

Abstract

The invention discloses a preparation method of a double-layer ceramic filter membrane for separation and refining of traditional Chinese medicine, which comprises the steps of: 1) preparation of thefirst layer of a primary filter ceramic membrane, in which aluminum hydroxide powders and carbon fibers are used as a ceramic pore-forming agent and aluminum oxide as a matrix to perform hot-pressingsintering to obtain a porous ceramic membrane; and 2) preparation of the second layer of a micro-filter ceramic membrane and double layer compounding, in which the aluminum oxide is used as the matrixof the ceramic membrane to spray the pore-forming agent (polyvinyl alcohol) onto a laying layer of the aluminum hydroxide powders for granulating, then the product and the prepared first layer of theprimary filter ceramic membrane are molded by means of hot pressing and compounding, and then the molded product is hot-pressed and sintered to obtain a double-layer ceramic filter membrane. The inventive method may control the porosity and the pore size of porous ceramics with convenient molding, simple technological operation and strong designability of shape. Products prepared by the inventivemethod have uniformly-distributed pores and good separating effect, as well as potential and wide practical values in the separation technical field, in particular in the field of separation and refining for decocted solution of the traditional Chinese medicine.

Description

technical field

[0001] The invention relates to a membrane, in particular to a preparation method of a double-layer porous ceramic filter membrane used for the separation and purification of traditional Chinese medicine, and belongs to the technical field of medicine separation. Background technique

[0002] Due to the diversification of plant-based traditional Chinese medicine components, in order to obtain as complete a "natural combinatorial chemical library" as possible from traditional Chinese medicine and its compound prescriptions, appropriate Chinese medicine refining technology should make the refined product have multiple components of a certain molecular weight segment (effective Components or effective parts), while abandoning such macromolecular ineffective components such as plant cell wall substances. Modern membrane separation technology uses the characteristics of membrane pore size to separate substances. Membrane separation products can be a single compone...

Examples

Embodiment 1

[0017] 1) Weigh 2.0000g of aluminum hydroxide powder with a particle size of 2-4.6μm, 0.2000g of carbon fiber with a diameter of Φ6-7μm, and 100.0000g of alumina powder, and set aside. Weigh 1.6500g methylcellulose, add it into a beaker filled with 100mL distilled water and stir, vibrate for 40min under the action of ultrasonic wave, add carbon fiber and continue ultrasonic dispersion for 2h, then, filter and dry the above dispersed carbon fiber, and weigh The good aluminum hydroxide powder and alumina powder are mixed in a roller mill for 1 hour to mix evenly, and pressed into shape with a circular mold. Under the pressure of 1250 ° C and 0.30 MPa, hot pressing and sintering in the air atmosphere, heat preservation for 3.0 hours, the finished product looks like Grinding, pickling, cleaning, vacuum drying. The first layer of primary filter ceramic membrane is prepared.

[0018] 2) Weigh and 1.0000g polyvinyl alcohol, set aside. Weigh 100.0000g of alumina powder, put the alum...

Embodiment 2

[0020] 1) Weigh 1.5000g of aluminum hydroxide powder with a particle size of 3-4.6μm, 0.2000g of carbon fiber with a diameter of Φ7μm, and 100.0000g of alumina powder, and set aside. Weigh 1.8000g of methylcellulose, add it into a beaker filled with 100mL of distilled water and stir, vibrate for 35min under the action of ultrasound, add carbon fiber and continue ultrasonic dispersion for 3h, then filter and dry the above dispersed carbon fiber, and weigh The good aluminum hydroxide powder and alumina powder are mixed in a roller mill for 1.5 hours, mixed evenly, pressed with a circular mold, hot-pressed and sintered in an air atmosphere at 1300 ° C and 0.35 MPa pressure, and kept for 2.5 hours. The surface of the finished product Grinding, pickling, cleaning, vacuum drying. The first layer of primary filter ceramic membrane is prepared.

[0021] 2) Weigh and 1.5000g polyvinyl alcohol, set aside. Weigh 100.0000g of alumina powder, put the alumina powder in a ball mill and add...

technical field

[0001] The invention relates to a membrane, in particular to a preparation method of a double-layer porous ceramic filter membrane used for the separation and purification of traditional Chinese medicine, and belongs to the technical field of medicine separation. Background technique

[0002] Due to the diversification of plant-based traditional Chinese medicine components, in order to obtain as complete a "natural combinatorial chemical library" as possible from traditional Chinese medicine and its compound prescriptions, appropriate Chinese medicine refining technology should make the refined product have multiple components of a certain molecular weight segment (effective Components or effective parts), while abandoning such macromolecular ineffective components such as plant cell wall substances. Modern membrane separation technology uses the characteristics of membrane pore size to separate substances. Membrane separation products can be a single compone...

Examples

Embodiment 1

[0017] 1) Weigh 2.0000g of aluminum hydroxide powder with a particle size of 2-4.6μm, 0.2000g of carbon fiber with a diameter of Φ6-7μm, and 100.0000g of alumina powder, and set aside. Weigh 1.6500g methylcellulose, add it into a beaker filled with 100mL distilled water and stir, vibrate for 40min under the action of ultrasonic wave, add carbon fiber and continue ultrasonic dispersion for 2h, then, filter and dry the above dispersed carbon fiber, and weigh The good aluminum hydroxide powder and alumina powder are mixed in a roller mill for 1 hour to mix evenly, and pressed into shape with a circular mold. Under the pressure of 1250 ° C and 0.30 MPa, hot pressing and sintering in the air atmosphere, heat preservation for 3.0 hours, the finished product looks like Grinding, pickling, cleaning, vacuum drying. The first layer of primary filter ceramic membrane is prepared.

[0018] 2) Weigh and 1.0000g polyvinyl alcohol, set aside. Weigh 100.0000g of alumina powder, put the alum...

Embodiment 2

[0020] 1) Weigh 1.5000g of aluminum hydroxide powder with a particle size of 3-4.6μm, 0.2000g of carbon fiber with a diameter of Φ7μm, and 100.0000g of alumina powder, and set aside. Weigh 1.8000g of methylcellulose, add it into a beaker filled with 100mL of distilled water and stir, vibrate for 35min under the action of ultrasound, add carbon fiber and continue ultrasonic dispersion for 3h, then filter and dry the above dispersed carbon fiber, and weigh The good aluminum hydroxide powder and alumina powder are mixed in a roller mill for 1.5 hours, mixed evenly, pressed with a circular mold, hot-pressed and sintered in an air atmosphere at 1300 ° C and 0.35 MPa pressure, and kept for 2.5 hours. The surface of the finished product Grinding, pickling, cleaning, vacuum drying. The first layer of primary filter ceramic membrane is prepared.

[0021] 2) Weigh and 1.5000g polyvinyl alcohol, set aside. Weigh 100.0000g of alumina powder, put the alumina powder in a ball mill and add...

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