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Dewaxing and degreasing method of shellac resin

A technology of shellac resin and shellac wax, which is applied in the refining of natural resins, etc., can solve problems such as wax solidification and catheter blockage.

Active Publication Date: 2013-04-03
THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The difficulty of this method is that the drum of the centrifuge and the outlet pipe of the wax liquid must have insulation facilities, otherwise there will be phenomena such as solidification of the wax and blockage of the pipe.

Method used

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  • Dewaxing and degreasing method of shellac resin
  • Dewaxing and degreasing method of shellac resin
  • Dewaxing and degreasing method of shellac resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] 1. Preparation of lac resin-sodium carbonate solution

[0091]1A. Crush the lacella gum (purple stem) into granules with a particle size of 4-6 mm, and remove impurities such as branches and sand through a circular pendulum sieve;

[0092] 1B. Add 8 kg of pulverized lacella gum particles to 100 L of sodium carbonate aqueous solution with a concentration of 0.15 mol / L, heat and keep the temperature at 90 ° C, and filter to remove mechanical impurities under the condition of keeping the temperature at 90 ° C after stirring and dissolving to obtain Shellac resin-sodium carbonate solution, wherein, the ratio of the weight of shellac gum to the volume of sodium carbonate aqueous solution is 8:100, namely the shellac gum of 0.08kg is added in every 1L described sodium carbonate aqueous solution or every 100mL described sodium carbonate Add 8g of shellac gum to the aqueous solution; the temperature of the shellac resin-sodium carbonate solution is 90°C;

[0093] 2. The first ...

Embodiment 2

[0117] 1. Preparation of lac resin-sodium carbonate solution

[0118] 1A. Crush the lacella gum (purple stem) into granules with a particle size of 4-6 mm, and remove impurities such as branches and sand through a circular pendulum sieve;

[0119] 1B. Add 11kg of crushed shellac gum particles to 100 L of sodium carbonate aqueous solution with a concentration of 0.10 mol / L, heat and keep the temperature at 90°C, and filter to remove mechanical impurities after stirring and dissolving and keeping the temperature at 90°C to obtain Shellac resin-sodium carbonate solution, wherein, the ratio of original collagen weight to the volume of sodium carbonate aqueous solution is 11:100, promptly add the shellac gum of 0.11kg in every 1L described sodium carbonate aqueous solution or every 100mL described sodium carbonate Add 11g of shellac gum to the aqueous solution; the temperature of the shellac resin-sodium carbonate solution is 90°C;

[0120] 2. Crystallization treatment

[0121]Th...

Embodiment 3

[0128] 1. Preparation of lac resin-sodium carbonate solution

[0129] 1A. Crush the lacella gum (purple stem) into granules with a particle size of 1-4 mm, and remove impurities such as branches and sand through a circular pendulum sieve;

[0130] 1B. Add 5 kg of pulverized lacella gum particles to 100 L of sodium carbonate aqueous solution with a concentration of 0.15 mol / L, heat and keep the temperature at 85 ° C, and filter to remove mechanical impurities under the condition of keeping the temperature at 85 ° C after stirring and dissolving to obtain Shellac resin-sodium carbonate solution, wherein, the ratio of the weight of shellac gum to the volume of sodium carbonate aqueous solution is 5:100, promptly add 0.05kg shellac gum or every 100ml described sodium carbonate solution in every 1L described sodium carbonate aqueous solution 5g of shellac gum was added to the aqueous solution; the temperature of the prepared shellac resin-sodium carbonate solution was 85°C;

[013...

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Abstract

The invention discloses a dewaxing and degreasing method of shellac resin. The dewaxing and degreasing method comprises the steps of: crystallizing alkaline solution with dissolved shellac resin, so that shellac wax and oil are crystallized and separated out; and carrying out solid-liquid separation and removing the shellac wax and oil, so as to obtain the dewaxed and degreased shellac resin. The dewaxing and degreasing method of the shellac resin disclosed by the invention is simple in process, and convenient to operate; the content of shellac wax in the shellac resin is obviously reduced; and the service performances of bleached lac, shellac piece and granular lac prepared from the dewaxed and degreased shellac resin accord with the state standard of the People's Republic of China of corresponding product.

Description

technical field [0001] The invention relates to a production method of natural resin, in particular to a production method of dewaxed and defatted shellac resin. Background technique: [0002] Lac, also known as shellac, is a natural animal resin secreted by lac insects parasitic on host plants. Quality 5-6%, pigment 1-3%, moisture 1-3%, and the rest are impurities such as insect corpses, sawdust, and sand. [0003] Lac resin is a mixture of esters and polyesters composed of hydroxy fatty acids and hydroxy sesquiterpene acids, with an average molecular weight of about 1000. Each shellac resin molecular monomer contains 4 to 5 hydroxyl groups and 2 to 3 ester groups. 1 free carboxyl group and 1 aldehyde group. Among the shellac resins, those that can be dissolved in ether are called soft resins, accounting for about 30%. There are various monoesters of aliphatic lac acids and terpene-like lac acids in the soft resins; those that are insoluble in ether are called hard resins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/02
Inventor 张弘刘国兴陈军陈晓鸣郑华陈智勇李坤李金仙张敏
Owner THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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