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Method for cleaning animal fibers with supercritical fluid

A technology of supercritical fluid and animal fiber, which is applied in the direction of dry cleaning fiber products, textiles and papermaking, and processing textile material containers. The effect of simple process

Pending Publication Date: 2020-02-04
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional cashmere (wool) washing process consumes a lot of water, consumes a lot of energy, uses a lot of chemical reagents, takes a long time, and has complicated procedures. As an ecological and environmentally friendly green solvent, supercritical fluid replaces water as an animal fiber cleaning The reaction medium can reduce the production of a large amount of industrial wastewater, and proposes new ideas to solve the problems of high water consumption, high energy consumption and high pollution in the traditional textile dyeing and finishing pretreatment
CN101805985A discloses a supercritical carbon dioxide whitening method for yak hair. This patent mainly introduces a bleaching method. Although this bleaching method can improve the whiteness of fibers to a certain extent, it cannot effectively remove grease. and other impurities

Method used

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  • Method for cleaning animal fibers with supercritical fluid
  • Method for cleaning animal fibers with supercritical fluid
  • Method for cleaning animal fibers with supercritical fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Present embodiment provides a kind of cleaning method of cashmere (wool) fiber in supercritical carbon dioxide fluid, adopts above-mentioned device to carry out, comprises the following steps:

[0046] A. Dissolve about 0.2g of surfactant AOT in 10mL of ethanol solution, and stir until completely dissolved, then add lipase with a concentration of about 1g / L, and then add detergent with a concentration of about 4g / L. The trade name of the white cat detergent, and then stirred until clarified to prepare a mixed working solution,

[0047] B. Put the mixed working fluid in the working fluid storage kettle 100, place the sarong 600 containing about 10 g of cashmere fiber in the working kettle 200, and the working fluid storage kettle 100 and the working kettle 200 are sealed and connected to form supercritical carbon dioxide washing cashmere device to ensure that the bottom of the sarong 600 is kept at a distance of 45 cm from the liquid surface of the mixed working fluid, s...

Embodiment 2

[0071] This embodiment provides a method for cleaning cashmere (wool) fibers in a supercritical carbon dioxide fluid. The cleaning method is basically the same as that described in Embodiment 1, and will not be repeated here. The difference is that the lipase concentration in this example is 3g / L. The fat content, degreasing rate and whiteness test results of the wool products processed by the velvet washing process in this embodiment are: the fat content is 0.64%, the degreasing rate is 83.05%, and the whiteness is 70.76.

Embodiment 3

[0073] This embodiment provides a method for cleaning cashmere (wool) fibers in a supercritical carbon dioxide fluid. The cleaning method is basically the same as that described in Embodiment 1, and will not be repeated here. The difference is that the lipase concentration in this example is 5g / L. The fat content, degreasing rate and whiteness test results of the wool products processed by the velvet washing process in this embodiment are: the fat content is 1.3%, the degreasing rate is 69.53%, and the whiteness is 68.16. .

[0074] By embodiment 1-3 and image 3 , Figure 4 , Figure 5 The effect of lipase concentration in supercritical carbon dioxide fluid on the fat content, degreasing rate, and whiteness of cashmere fiber after treatment can be seen from the figure with the increase of lipase concentration. The fat content rate of cashmere fiber decreases gradually, while the degreasing rate increases gradually. This is because the addition of lipase can obviously remo...

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Abstract

The invention relates to a method for cleaning animal fibers with a supercritical fluid, which comprises the steps: driving a working fluid by a circulating supercritical fluid, and treating animal fibers under closed state with the temperature of 10-130 DEG C, pressure of 6-30 MPa, and dynamic and static circulation time ratio of the fluid being 1:10, wherein the working fluid comprises a surfactant, an enzyme and a solvent. The method provided by the invention has the advantages of good operation convenience, low energy consumption, ecological environment friendliness and zero pollution.

Description

technical field [0001] The invention relates to a method for cleaning animal fibers, in particular to a method for cleaning animal fibers with supercritical fluid. Background technique [0002] Supercritical fluid refers to the condition that the gas is at the critical temperature and pressure, and at the same time has the physical and chemical properties between gas and liquid. It has a density close to that of liquid and its excellent solubility, and has high diffusivity of gas . And the solubility of solute in supercritical fluid is easily affected by the temperature and pressure in the device. Therefore, by changing the pressure and temperature of the supercritical fluid and changing its density, many different types of substances can be dissolved. [0003] The pre-treatment of raw wool includes opening, scouring, carbonization and bleaching. The type, content and nature of impurities contained in raw wool vary with the breed of sheep, pastoral conditions and feeding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L1/00
CPCD06L1/00D06B23/14
Inventor 龙家杰郑远彬
Owner SUZHOU UNIV
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