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Preparation process of calcium oxalate crystals in plants

A technology of middle calcium oxalate and preparation process, which is applied in the improvement of process efficiency, separation/purification of carboxylic acid compounds, organic chemistry and other directions, can solve the problems of high requirements on equipment conditions, hidden dangers of environment and safety, existence of preparation process, etc. The effect of low cost, simple operation and easy industrialization

Active Publication Date: 2019-05-10
GANSU UNIV OF CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation process of calcium oxalate crystals in plants, so as to solve the problems that the existing preparation methods have high risk of raw materials, high cost, high requirements on equipment conditions, and the problems of environmental and safety hazards in the preparation process

Method used

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  • Preparation process of calcium oxalate crystals in plants
  • Preparation process of calcium oxalate crystals in plants
  • Preparation process of calcium oxalate crystals in plants

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preparation example Construction

[0030] A preparation process of calcium oxalate crystals in plants comprises the following steps.

[0031] Step 1, coarse crushing to obtain powder.

[0032] Plants containing calcium oxalate crystals are crushed and passed through a 60-120 mesh sieve, and the water content of the plants is less than 10%.

[0033] Step 2, crude extraction to obtain a precipitate.

[0034] Add 5-20% sodium hydroxide solution that is 20-40 times the weight of the plant powder to the plant powder obtained in step 1, decoct for 0.5-2 hours, place it for 12-48 hours, stir gently during the place, and pour it off after the place Clear liquid, filter out a precipitate, add a 5-20% sodium hydroxide solution 20-40 times the weight of a precipitate to a precipitate, decoct for 15-60min, place for 6-24h, and gently stir for 0.5min every 10min during the standing process , Centrifuge or filter at 2000-4000 rpm after the end of standing, and get the secondary precipitate.

[0035] Step 3, cleaning the p...

Embodiment 1

[0040] A preparation process of calcium oxalate crystals in roots and rhizomes of rhubarb (Rheum palmatum L., Rheum tanguticumMaxim.ex Balf. or medicinal rhubarb Rheum officinale Baill.) comprises the following steps.

[0041] Step 1, coarsely crush rhubarb roots and rhizomes to obtain 500 g of powder.

[0042] The rhubarb roots and rhizomes containing calcium oxalate crystals are crushed and passed through an 80-mesh sieve, and the water content of the rhubarb roots and rhizomes is less than 10%.

[0043] Step 2, crude extraction to obtain a precipitate.

[0044] Add 10% sodium hydroxide solution 20 times the weight of rhubarb root and rhizome powder to the rhubarb root and rhizome powder obtained in step 1, decoct for 1 hour, place for 24 hours, stir gently during the place, pour off the supernatant after the place is over , filter out a precipitate, add a 10% sodium hydroxide solution 20 times the weight of a precipitate to a precipitate, decoct for 30min, place for 12h, g...

Embodiment 2

[0051] A preparation process of calcium oxalate crystals in roots and rhizomes of licorice (Glycyrrhiza uralensis Fisch., Glycyrrhiza inflataBat. or Glycyrrhiza glabra L.) comprises the following steps.

[0052] Step 1, coarsely crushing licorice roots and rhizomes to obtain 500 g of powder.

[0053] The rhubarb roots and rhizomes containing calcium oxalate crystals are crushed and passed through a 120-mesh sieve, and the water content of the licorice roots and rhizomes is less than 10%.

[0054] Step 2, crude extraction to obtain a precipitate.

[0055] Add 5% sodium hydroxide solution that is 40 times the weight of licorice root and rhizome powder to the licorice root and rhizome powder obtained in step 1, decoct for 0.5h, place for 12h, stir gently during the place, and pour off the supernatant after the place is over Liquid, filter out a precipitate, add a 5% sodium hydroxide solution 40 times the weight of a precipitate to a precipitate, decoct for 15 minutes, place for ...

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Abstract

The invention discloses a preparation process of calcium oxalate crystals in plants, and belongs to the technical field of plant crystal extraction. The preparation process includes the following steps: coarsely crushing to obtain powder, coarsely extracting to obtain precipitate, cleaning the precipitate and refining and purifying to obtain calcium oxalate crystals. According to the preparation process, plant tissues contain calcium oxalate crystals, the calcium oxalate is insoluble in 5-20% of a sodium hydroxide solution, the plant tissues are dissociated by an alkali liquid to separate thecalcium oxalate crystals, and then the calcium oxalate crystals are separated from water, the crystals are repeatedly washed by water, the alkali liquid is cleaned, and impurities are washed by ethanol to obtain the calcium oxalate crystals. The preparation process is clean and green, the raw materials come from natural plant tissues or residues, the cost is low, the process is simple, the operation is simple, and the industrialization is easy. The yield of calcium oxalate prepared by the preparation process reaches 10% (plant tissue raw materials), and the prepared calcium oxalate can be applied to industries such as industry, medicine and the like, and has better utilization value.

Description

technical field [0001] The invention belongs to the technical field of plant crystal extraction, and in particular relates to a preparation process of calcium oxalate crystals in plants. Background technique [0002] Calcium oxalate (CaC 2 o 4 ) CAS No. 563-72-4, is a white crystalline powder. Insoluble in water, acetic acid, soluble in dilute hydrochloric acid or dilute nitric acid. It turns into calcium carbonate or calcium oxide when burned. Used for ceramic glazing, bio-inorganic membrane preparation, analytical reagents, separation of rare metals, oxalic acid production, etc. [0003] The current preparation methods mainly include two kinds. [0004] One is to use calcium chloride aqueous solution and oxalic acid aqueous solution to heat and react together to obtain calcium oxalate monohydrate, and then dry to constant weight in hot air to obtain anhydrous calcium oxalate. Use dilute aqueous solution of refined calcium chloride and oxalic acid aqueous solution to ...

Claims

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Application Information

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IPC IPC(8): C07C51/42C07C51/43C07C51/47C07C55/07
CPCY02P10/20
Inventor 王明伟李波
Owner GANSU UNIV OF CHINESE MEDICINE
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