Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Manufacturing method of mechanical pulp from cornstalk

A manufacturing method and technology of cellulose, applied in textiles and papermaking, pulping with inorganic alkali, fiber raw material treatment, etc., can solve problems such as temperature or time not mentioned

Inactive Publication Date: 2008-06-11
柳海日 +1
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent says nothing about the composition of the solution, the temperature or time of the digestion / dissolution process

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The ground cornstalks were treated in a steam chamber at about 95°C for 10 minutes. The condensate was drained and infiltrated at 50° C. for about 20 minutes by adding 3 parts by weight of sodium oxide per 100 parts by weight of ground cornstalk. After infiltration, drain the digestion solution. Then, steam is supplied directly to the infiltrated cornstalks. The reaction was carried out at about 130°C for 10 minutes. The digested cornstalks are discharged using a screw conveyor and poured into a conventional pressurized double disc mill. During pouring, 10 parts by weight of sodium oxide was added per 100 parts by weight of crushed corn stalks as a digestion agent for the second digestion. The pulp / liquid mixture is transferred from the refiner to a digester and digested at 160°C for about 60 minutes. The digested pulp is discharged and refined again. The refining process is carried out at a pressure of about 450KPa.

Embodiment 2

[0025] The procedure of Example 1 was repeated, but during feeding into the refiner for the second refining process, 7 parts by weight of sodium oxide was added as a digester per 100 parts by weight of ground corn stover.

[0026]The pulp obtained in Examples 1 and 2 can be further refined to increase tensile strength, breaking strength and density. The pulp produced by the invention can be used to completely or partially replace chemical pulp. For example, it is suitable for all kinds of paper, including newspaper, tissue paper, printer paper, carton, etc., but not limited to them.

[0027] The tensile modulus of the pulp obtained in Examples 1 and 2 is 20-47Nm / G, and the breaking strength is 0.6-3.5kPam 2 / g, the density is 2-4kg / m 2 .

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 present invention relates to a manufacturing method of mechanical pulp from stalks of corn, an annual plant, by adding a digesting agent and, prior to, during or following addition of the digesting agent, completely separating fibrous material from the cornstalks by mechanical refining. The method of the present invention comprises: (1) a first digesting process of adding 0.5-5 parts by weight of a digesting agent selected from caustic soda, sodium carbonate, sodium sulfite, sodium bisulfite, sodium sulfide, sodium oxide and sodium sulfate, or a digesting agent selected from a mixture of more than one of each to 100 parts by weight of crushed cornstalks, and of separating and digesting the solid substance after impregnating of the mixture; (2) a second digesting process of adding 5-10 parts by weight of more digesting agent to the digested solid substance obtained from the first digesting process, and of separating and digesting the solid substance after impregnating of the mixture; and a refining process of separating the solid substance to be digested and refining it mechanically, which is performed prior to, during or following the second digesting process.

Description

technical field [0001] The present invention relates to a method for producing mechanical pulp from cornstalk cellulose. More particularly, it relates to a process for producing cellulose from cornstalk by adding a digesting agent to the stalk of the annual plant maize and refining the cornstalk mainly mechanically before, during or after the addition of the digesting agent to completely separate the cornstalk fibers Process for manufacturing wood pulp. Background technique [0002] With the growth of national income, South Korea has become the seventh largest consumer of paper (including publications, newspapers, publishing cardboard, kraft paper, bulk paper, etc.) in the world, and the ninth largest paper producer in the world. However, 100% of the pulp is imported from abroad for papermaking. In order to meet the demand for pulp materials, some countries with scarce forest resources such as China, the Middle East and India are studying on a national scale to turn herbac...

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
Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/06
CPCD21C5/00D21C1/06D21C3/02
Inventor 柳海日
Owner 柳海日
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com