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
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 was

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing unbleached pulp from sunflower seed shells

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1:

[0031] Buy raw sunflower seeds in the market, manually peel them, soak the raw sunflower seed shells in 40-50℃ water for 60 minutes, rub and rinse with water, squeeze out the excess water with a filter, dry it, and control the moisture at 8%-15%. Obtain raw sunflower seed shell pieces. NaOH (in Na 2 O based on the addition of 17% (by weight of the absolute dry raw material), Na 2 S (in Na 2 O) is added in an amount of 20% (wt% of the absolute dry raw materials), according to NaOH liquid and Na 2 The volume ratio of S liquid is 1:3.5 to configure cooking liquid. Put 100g pieces (based on absolute dry mass) into the cooking pot in 4 layers, pour the prepared cooking liquid between the layers, and the amount of poured increases from bottom to top, respectively, the total cooking medicine 1 / 10, 1 / 5, 3 / 10, 2 / 5 of the volume of the liquid, sealed, shaken and immersed in a pool of 60-70℃ for 60min, shaking frequency times / 15min. Put the small cooking pot directly i...

Example Embodiment

[0032] Example 2:

[0033] Buy raw sunflower seeds in the market, manually peel them, soak the raw sunflower seed shells in 40-50℃ water for 60 minutes, rub and rinse with water, squeeze out the excess water with a filter, dry it, and control the moisture at 8%-15%. Obtain raw sunflower seed shell pieces. NaOH (in Na 2 O based on the addition of 18.6% (by weight of the absolute dry raw material), Na 2 S (in Na 2 O) is added in an amount of 20% (wt% of the absolute dry raw materials), according to NaOH liquid and Na 2 The volume ratio of S liquid is 1:3.5 to configure cooking liquid. Put 100g pieces (calculated by absolute dry mass) into a small cooking tank in layers, pour the prepared cooking liquid between the layers, the amount of pour is increased layer by layer, sealed, shake well and set the temperature to 60 Immerse in a pool of -70℃ for 60min, shaking frequency times / 15min. Put the small cooking pot directly into the rotary electric cooking pot, airtight, heat up, heat ...

Example Embodiment

[0034] Example 3:

[0035] Buy raw sunflower seeds in the market, manually peel them, soak the raw sunflower seed shells in 40-50℃ water for 60 minutes, rub and rinse with water, squeeze out the excess water with a filter, dry it, and control the moisture at 8%-15%. Obtain raw sunflower seed shell pieces. NaOH (in Na 2 O based on the addition of 20% (by weight of the absolute dry raw material), Na 2 S (in Na 2 O based on the addition of 22% (weight% of the absolute dry raw materials), according to NaOH liquid and Na 2 The volume ratio of S liquid is 1:3.5 to configure cooking liquid. Put 100g pieces (calculated by absolute dry mass) into a small cooking tank in layers, pour the prepared cooking liquid between the layers, the amount of pour is increased layer by layer, sealed, shake well and set the temperature to 60 Immerse in a pool of -70℃ for 60min, shaking frequency times / 15min. Put the small cooking pot directly into the rotary electric cooking pot, airtight, heat up, heat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products