Cellulose prepared from straw

A cellulose and raw material technology, applied in fiber raw material processing, pulping with inorganic alkali, textile and paper making, etc., can solve the problems of product cost fluctuation, large price change, price fluctuation and so on

Inactive Publication Date: 2016-06-22
SHANDONG YITENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Due to the high content of α-cellulose in refined cotton (up to 99%), using it as raw material to produce cellulose ether has certain technical advantages, but this method also has certain defects: due to weather, market and other reasons, the α-cellulose of cotton Large fluctuations in quality, output, and price lead to large fluctuations in the quality, output, and price of refined cotton, directly affecting the production of cellulose ether, resulting in product cost fluctuations, price fluctuations, and affecting product sales and customer use
However, due to the physical and chemical structure of straw and the production process of cellulose ether, it is not yet possible to use straw to prepare cellulose ether.

Method used

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Experimental program
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Embodiment Construction

[0007] The production process of the present invention will be described in detail below by taking the production of hydroxypropyl methylcellulose ether from straw as an example.

[0008] The first step: pretreatment of straw

[0009] Firstly, the straw is crushed by using a straw crusher, and the crushed straw is then ground by a ball mill to obtain straw powder with a bulk density ≥ 120 g / L.

[0010] Put 7000 parts of reaction solvent containing 70% of isopropanol and 30% by weight of water and 1200 parts of sodium hydroxide into the reactor, and put 2000 parts of ground straw powder into the reactor to remove the oxygen in the reactor, raise the temperature to 90°C, and keep the temperature constant. 2h. The temperature was lowered to 20°C, and the activated straw powder was separated by a centrifuge. At this time, the contents of lignin and hemicellulose in the straw powder were significantly reduced, and the main component was cellulose.

[0011] The second step: alkal...

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Abstract

The purpose of the present invention is to disclose Using straw as raw material to prepare cellulose, 1. Pretreatment of straw 2. Alkalinization of cellulose 3. Etherification of alkali cellulose. This invention can use straw instead of refined cotton to prepare cellulose ether, which will greatly reduce production costs and increase the added value of straw , To find a new way for farmers to generate income.

Description

technical field [0001] The invention belongs to the field of fine chemical engineering of polymer materials, and relates to the production and processing of various crop straws (such as wheat straw, corn straw, sorghum straw, etc.) Anionic cellulose, carboxymethyl cellulose, etc.) preparation and application. Background technique [0002] Cellulose ether is a general term for a class of polymer compounds modified by ether groups with cellulose as raw material, and there are many types of products. These products generally have excellent water retention, thickening, suspending, viscosifying, film-forming properties, etc., and can be used as emulsifiers, thickeners, dispersants, stabilizers, sizing agents, film-forming agents, water-retaining agents, etc. , used in petroleum, textile, daily chemical, cigarette, paper, construction, food, medicine and other fields, known as "industrial monosodium glutamate". With the rapid development of my country's national economy, the dem...

Claims

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Application Information

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IPC IPC(8): C08B11/193C08B1/08D21C5/00D21C3/02
CPCC08B11/193C08B1/08D21C3/02D21C5/00
Inventor 张双剑滕鲲
Owner SHANDONG YITENG NEW MATERIAL CO LTD
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