Method for continuously extracting lacquer wax and lacquer by supercritical CO2 fluid

A supercritical and extraction technology, applied in the production of fat oil/fat and fat production, can solve the problems of cumbersome operation, separation of raw material skin and core, solvent residue, etc. Effect

Inactive Publication Date: 2011-05-11
SHAANXI RES INST OF AGRI PRODS PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A method for preparing rhubarb wax from rhubarb seeds (application number: 200810124814.0) has disclosed the method of extracting rhubarb wax with organic solvents, but there are disadvantages such as the separation of the skin and core of the raw materials, solvent residues, and cumbersome operations.
Research on the extraction method of lacquer wax (oil) from lacquer seeds (China Oil, 2004, Volume 29, No. 7, p44-47), although supercritical CO 2 Research on fluid extraction of paint oil, but the pretreatment of raw materials requires separation of skin and core, and the resulting product is a mixture of paint wax and paint oil, and subsequent separation is still required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) First, take 200 g of lacquer seeds after screening and removing impurities, and crush it to 40 mesh;

[0016] 2) Secondly, place the pulverized paint seeds in supercritical CO 2 Extraction tank, and heated to 40 ° C, pressurized to 30Mpa; open the CO 2 Flow control valve to control CO 2 After extraction at a flow rate of 18 L / h for 90 minutes, the lacquer wax was separated through the separation kettle I and the separation kettle II respectively, and the extraction yield of the lacquer wax was 20.2%;

[0017] The pressure of the separation tank I is 5Mpa, and the separation temperature is controlled at 55°C; the pressure of the separation tank II is 4Mpa, and the separation temperature is controlled at 50°C;

[0018] 3) Finally, at a temperature of 40°C and a pressure of 30Mpa, CO 2 The flow rate is 18L / h and the extraction is continued for 110 minutes, and then the lacquer oil is separated through the separation kettle I and the separation kettle II respectively,...

Embodiment 2

[0021] 1) First, take 200 g of lacquer seeds after screening and removing impurities, and crush it to 50 mesh;

[0022] 2) Secondly, place the pulverized paint seeds in supercritical CO 2 Extraction tank, and heated to 45 ° C, pressurized to 35Mpa; open the CO 2 Flow control valve to control CO 2 After extraction at a flow rate of 10L / h for 100min, the lacquer wax was separated through the separation kettle I and the separation kettle II respectively, and the extraction yield of the lacquer wax was 22.9%;

[0023] The pressure of the separation tank I is 6Mpa, and the separation temperature is controlled at 50°C; the pressure of the separation tank II is 5Mpa, and the separation temperature is controlled at 45°C;

[0024] 3) Finally, at 45°C and a pressure of 35Mpa, CO 2 The flow rate is 10L / h and the extraction is continued for 120 minutes, and then the varnish is separated through the separation kettle I and the separation kettle II respectively, and the extraction yield ...

Embodiment 3

[0027] 1) First, take 200 g of lacquer seeds after screening and removing impurities, and crush it to 60 mesh;

[0028] 2) Secondly, place the pulverized paint seeds in supercritical CO 2 Extraction tank, and heated to 35 ° C, pressurized to 32Mpa; open the CO 2 Flow control valve to control CO 2 The flow rate was 25L / h, and after extraction for 80 minutes, the lacquer wax was separated through the separation kettle I and the separation kettle II respectively, and the extraction yield of the lacquer wax was 21.3%;

[0029] The pressure of the separation tank I is 5.5Mpa, and the separation temperature is controlled at 53°C; the pressure of the separation tank II is 4.5Mpa, and the separation temperature is controlled at 48°C;

[0030] 3) Finally, at 35°C and a pressure of 32Mpa, CO 2 The flow rate is 25L / h and the extraction is continued for 100 minutes, and then the lacquer oil is separated through the separation kettle I and the separation kettle II respectively, and the ...

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Abstract

The invention discloses a method for continuously extracting lacquer wax and lacquer by a supercritical CO2 fluid, comprising the following steps: firstly, screening, purifying and smashing lacquer seeds; secondly, placing the smashed lacquer seeds into a supercritical CO2 extraction tank to be extracted for 80-100 minutes, controlling separation conditions, and carrying out two-step separation, thus the lacquer wax is obtained; and finally, continuously extracting for 100-120 minutes, controlling separation conditions, and carrying out two-step separation, thus the lacquer is obtained. The invention has simple process, no peel core separation is required, and the lacquer wax and lacquer can be respectively extracted in the same technological process. The invention adopts the supercritical CO2 fluid for extraction, no other substance is added in the whole extraction process, and the extracted lacquer wax and the extracted lacquer contain no impurities even organic solvents, thus solving the problems that the current squeeze method has low oil yield, the impurity content is high and the organic solvent is residual after being used for extraction.

Description

technical field [0001] The invention belongs to the technical field of natural vegetable oil extraction and processing, in particular to a supercritical CO 2 Method for fluid continuous extraction of lacquer wax and paint oil. Background technique [0002] Lacquer wax and lacquer oil are the oily parts of lacquer seeds. The lacquer seed is the fruit of the sumac tree (Toxicodendron vernicifluum), the mesocarp is a waxy layer, which is light yellow or gray-green, and the lacquer wax can be extracted, and the inner core is a seed, which can be used to extract the lacquer oil. Lacquer wax contains more than 90% fatty acid glycerides, of which palmitic acid content reaches about 70%, which is a high-quality natural chemical raw material for the production of surfactants and detergents. The lacquer oil contains more than 60% linoleic acid, which has the functions of adjusting blood lipid and anti-arteriosclerosis, and can reduce the morbidity and mortality of coronary heart dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10C11B1/04
Inventor 罗仓学张冲张华
Owner SHAANXI RES INST OF AGRI PRODS PROCESSING TECH
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