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Hemp degumming process

A technology of hemp and process, applied in the field of degumming, can solve the problems of low output of hemp fiber, and achieve the effects of good quality and reduced alkali concentration

Inactive Publication Date: 2007-10-31
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hemp fiber has been difficult to solve due to some technical bottlenecks, so the output of hemp fiber in the world is very small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Bind the marijuana with 300 grams each, rinse it three times with tap water, and pack 1500 grams in each cage evenly.

[0024] 2) Smelting at normal temperature and pressure, the smelting formula is: 5% sodium hydroxide, 2% sodium silicate, 2% sodium tripolyphosphate; liquor ratio (ratio of cannabis weight to aqueous solution volume) is 1:15, heat to 90°C, cook for 2 hours, then remove and wash with tap water three times.

[0025] 3) High temperature and high pressure cooking, the cooking formula is: 5% sodium hydroxide, 8% sodium sulfide, 0.02% anthraquinone, 2% sodium silicate, and 2% sodium tripolyphosphate. The bath ratio is 1:4, the heating rate is 3° C. / min, the temperature is raised to 140° C., the pressure is 0.5 MPa, and the temperature is kept for 40 minutes. Take out and wash with hot water.

[0026] 4) Wash the hemp with hot water at 50°C for 3 times, 5 minutes each time.

[0027] 5) Shaking the hemp A shaking machine is used to loosen the lumps of hem...

Embodiment 2

[0031] 1) Bind the marijuana with 300 grams each, rinse it three times with tap water, and pack 1500 grams in each cage evenly.

[0032] 2) Cooking at normal temperature and pressure, the cooking formula is: 5% sodium hydroxide, 2% sodium silicate, and 2% sodium tripolyphosphate; the bath ratio is 1:15, heated to 100°C, boiled for 1 hour, and then Take out and wash with tap water three times.

[0033] 3) High temperature and high pressure cooking, the cooking formula is: 4% sodium hydroxide, 8% sodium sulfide, 0.02% anthraquinone, 2.5% sodium silicate, and 3% sodium tripolyphosphate. The bath ratio is 1:5, the heating rate is 4°C / min, the temperature is raised to 150°C, the pressure is 0.65 MPa, and the temperature is kept for 30 minutes. Take out and wash with hot water.

[0034] 4) Wash the hemp with hot water at 70°C for 3 times, 5 minutes each time.

[0035] 5) Shaking the hemp A shaking machine is used to loosen the lumps of hemp.

[0036] 6) Soften the marijuana with...

Embodiment 3

[0039] 1) Bind the marijuana with 300 grams each, rinse it three times with tap water, and pack 1500 grams in each cage evenly.

[0040] 2) Cooking at normal temperature and pressure, the cooking formula is: 5% sodium hydroxide, 2% sodium silicate, and 2% sodium tripolyphosphate; the bath ratio is 1:15, heated to 95°C, boiled for 1.5 hours, and then Take out and wash with tap water three times.

[0041] 3) High temperature and high pressure cooking, the cooking formula is: 3% sodium hydroxide, 8% sodium sulfide, 0.02% anthraquinone, 3% sodium silicate, and 2.5% sodium tripolyphosphate. The bath ratio is 1:6, the heating rate is 3.5° C. / min, the temperature is raised to 160° C., the pressure is 0.8 MPa, and the temperature is kept for 20 minutes. Take out and wash with hot water.

[0042] 4) Wash the hemp with hot water at 60°C for 3 times, 5 minutes each time.

[0043] 5) Shaking the hemp A shaking machine is used to loosen the lumps of hemp.

[0044] 6) Soften the marijua...

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PUM

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Abstract

The invention discloses the process of the hemp come unglued. The hemp fiber is deal with the come unglued adopting the combination of the normal temperature, normal pressure and the high temperature, high pressure. The technical process is showed below: the pricking and loading the cave-the bath-the normal temperature and pressure-washing the hemp-cooking under the high temperature and pressure-washing with the hot water-the shaking hemp-pulling off the oil-the drying-the extracting dry hemp; the cooking smelting adopts the high temperature and the high pressure. The time used by the invention is shorter 1.5 hour than the time used by the normal come unglued process, the thickness of the alkali is depressed highly, the content percent of the xylogen of the hemp after the treatment is below the 0.5%, the loss of the mightiness of the fiber can be reduced to the least, the refining dry hemp is clean, relax and quality.

Description

technical field [0001] The invention relates to a degumming method, in particular to a hemp degumming process. Background technique [0002] Hemp fiber is one of the earliest natural textile fibers utilized by humans. But because tetrahydrocannabinol (THC) contained in cannabis can produce stimulants and drugs, cannabis planting was prohibited in the world as early as 1937, causing the research and development of hemp fiber to be basically at a standstill. Since Britain developed low-toxic cannabis (THC<0.3%) in 1992, Western countries have lifted the ban on cannabis cultivation. However, hemp fiber has been difficult to solve due to some technical bottlenecks, so the output of hemp fiber in the world is very small. Due to the hemp fiber fabric has no itching feeling, good drapability, high moisture absorption and breathability, soft and comfortable, antistatic, friction resistance, can inhibit bacteria, antibacterial health care, mildew resistance, high temperature res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/00
Inventor 冯新星陈建勇张建春郭玉海张华鹏
Owner ZHEJIANG SCI-TECH UNIV
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