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Method for preparing unbleached pulp from sunflower seed shells

A technology of sunflower seed hulls and natural color pulp, which is applied in the direction of pulping with inorganic alkali, non-woody plant/crop pulp, chemical/chemical mechanical pulp, etc., to improve pulp quality, high degree of polymerization, and ease the pulping and papermaking industry The effect of raw material pressure

Active Publication Date: 2016-08-17
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is aimed at the above technical problems, and provides a method for preparing natural color paste from sunflower seed husks, and the natural color chemical pulp prepared by this method realizes the resource utilization of sunflower seed husk waste, and the preparation method has the advantages of short cooking time , low drug consumption, high pulp yield, high degree of polymerization, etc., broaden the types of fiber raw materials for pulping and papermaking, and avoid environmental problems caused by solid waste

Method used

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  • Method for preparing unbleached pulp from sunflower seed shells

Examples

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Effect test

Embodiment 1

[0031] Buy raw sunflower seeds on the market, shell them manually, soak the raw sunflower seed shells in water at 40-50°C for 60 minutes, rub them, rinse them with water, squeeze out excess water with a filter, and dry them to control the water content at 8%-15%. Raw sunflower seed hull flakes are obtained. NaOH (as Na 2 (O meter) add-on is 17% (accounting for the wt% of dry raw material), Na 2 S (as Na 2 (O meter) add-on is 20% (accounting for the wt% of dry raw material), according to NaOH liquid and NaOH liquid 2 The volume ratio of S liquid is 1:3.5 to configure cooking liquid. Put 100g tablets (calculated on absolute dry mass) into small cooking pots in 4 layers, pour the prepared cooking liquid between the layers, and the pouring amount increases layer by layer from bottom to top, which are respectively the total cooking liquid 1 / 10, 1 / 5, 3 / 10, 2 / 5 of the volume of the liquid, sealed, shaken well, and immersed in a pool at a temperature of 60-70°C for 60 minutes, the...

Embodiment 2

[0033] Buy raw sunflower seeds on the market, shell them manually, soak the raw sunflower seed shells in water at 40-50°C for 60 minutes, rub them, rinse them with water, squeeze out excess water with a filter, and dry them to control the water content at 8%-15%. Raw sunflower seed hull flakes are obtained. NaOH (as Na 2 (O meter) add-on is 18.6% (accounting for the wt% of dry raw material), Na 2 S (as Na 2 (O meter) add-on is 20% (accounting for the wt% of dry raw material), according to NaOH liquid and NaOH liquid 2The volume ratio of S liquid is 1:3.5 to configure cooking liquid. Put 100g tablets (calculated by absolute dry mass) into small cooking pots in layers, pour the prepared cooking liquid between the layers, the amount of pouring increases layer by layer, seal, shake well, and place at a temperature of 60 Immerse in a water pool at -70°C for 60 minutes, and the frequency of shaking is 15 minutes. Put the small cooking pot directly into the rotary electric cooki...

Embodiment 3

[0035] Buy raw sunflower seeds on the market, shell them manually, soak the raw sunflower seed shells in water at 40-50°C for 60 minutes, rub them, rinse them with water, squeeze out excess water with a filter, and dry them to control the water content at 8%-15%. Raw sunflower seed hull flakes are obtained. NaOH (as Na 2 (O meter) add-on is 20% (accounting for the wt% of dry raw material), Na 2 S (as Na 2 (O meter) add-on is 22% (accounting for the wt% of absolute dry raw material), according to NaOH liquid and Na 2 The volume ratio of S liquid is 1:3.5 to configure cooking liquid. Put 100g tablets (calculated by absolute dry mass) into small cooking pots in layers, pour the prepared cooking liquid between the layers, the amount of pouring increases layer by layer, seal, shake well, and place at a temperature of 60 Immerse in a water pool at -70°C for 60 minutes, and the frequency of shaking is 15 minutes. Put the small cooking pot directly into the rotary electric cookin...

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Abstract

The invention relates to the technical field of unbleached paper making, in particular to a method for preparing unbleached pulp from sunflower seed shells. The method includes the steps that 1, raw sunflower seed shells are soaked in clean water, kneaded, rinsed, filtered and aired; 2, pretreated material slices are put in a small digesting tank layer by layer, digesting chemical liquid is sprinkled between the layers, and after sealing and shaking up, the small digesting tank is put in a warm water pool to be softened; 3, the small tank is directly put in a rotary electric heating digester and is subjected to sealing, temperature rise, heat preservation, deflation and blowing; 4, pulp and concentrated black liquid are separated, the pulp is put in a filter screen and washed to be neutral with clean water; 5, slag pulp of the washed pulp is screened out, extruding dewatering is conducted, fibers are dispersed through a pulp scattering device, and the sunflower seed shell unbleached chemical pulp is obtained. The unbleached chemical pulp prepared through the pulp preparation method is low in screened pulp yield, small in chemical dosage, high in polymerization and good in strength, and can be independently made into unbleached paper or / and blended with other fibers to be made into unbleached paper or bleached in the following process to produce paper with the requirement for whiteness.

Description

technical field [0001] The invention relates to the technical field of papermaking preparation, in particular to a method for preparing natural color paste from sunflower seed hulls. Background technique [0002] Sunflower seed is one of the five major oil crops in the world. Mainly produced in Ukraine, Russia, European Union, Argentina, China and other places. According to statistics, the global sunflower seed production reached 38.8 million tons in 2015-2016. my country's sunflower seed production areas are mainly distributed in the three northeastern provinces, Hebei, Shanxi, Inner Mongolia in North China, and Ningxia, Gansu, and Xinjiang in Northwest China. The planting area is stable at nearly one million hectares, and the planting area does not change much, but the output is increasing year by year According to the trend, the output in 2014 was about 2.5 million tons. Sunflower seeds generally produce about 55% kernels, and the rest are mainly melon seed shells. At ...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21H11/06D21C5/00D21C1/02D21C9/02D21C3/02
CPCD21C1/02D21C3/02D21C5/00D21C9/02D21H11/06D21H11/12
Inventor 刘春管秀琼高洪霞田儆毅谢娇王鹏刘丽娟
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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