Method for improving removal effect of ink in waste paper pulp

A waste paper pulp and ink technology, which is applied in the field of ink removal in waste paper pulp, to improve the ink removal effect in waste paper pulp, and can solve the problems of large-scale recycling and reuse of waste paper, unsuitability for industrialized large-scale production methods, and difficulty in improving economic benefits, etc. problems, to achieve the effect of improving deinking effect, reducing the loss of good pulp components, and enhancing flotation selectivity
CN101725069AInactive Publication Date: 2010-06-09SOUTH CHINA UNIV OF TECH
0 Cites 15 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2010-06-09
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a method for improving a removal effect of ink in waste paper pulp. The method comprises the steps of: breaking waste paper, and diluting obtained pulp; then relative to the absolute dry mass of the paper pulp, adding 0.0025 to 0.5 percent of nonionic deinking agent into the pulp; at the same time, adding an anionic dispersant with a dispersion effect, wherein the consumption of the anionic dispersant is 0.001 to 0.3 percent of the absolute dry mass of the paper pulp; and floating at the temperature of between 40 and 50 DEG C after the mixture is stirred uniformly to remove the ink in the waste paper pulp, wherein the anionic dispersant is anionic polyacrylamide, or is one of polyacrylate and polymethacrylate. The method adopts the cheaper dispersant to compound the deinking agent with higher cost for floatation, which promotes deinking effect, and also solves the problems of cost increase caused by overhigh consumption of the deinking agent and the decrease of economic benefit caused by excessive fiber loss.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to ink removal in waste paper pulp, in particular to a method for improving ink removal effect in waste paper pulp. It belongs to the technical field of secondary fiber recycling. Background technique

[0002] The paper industry is an important industry that is closely related to the development of the national economy and the construction of social civilization. In economically developed countries, the growth rate of paper and cardboard consumption is synchronized with the growth rate of GDP. The role played by the paper industry in the modern economy has attracted more and more attention from the world. However, in recent years, due to the influence of resources, environment, and benefits, especially the shortage of raw materials, energy crisis, and environmental pollution, the world's paper industry has gradually moved towards high efficiency, high quality, high benefit, low consumption, and low consumption. The development o...

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