Chlorine Bleach Wood Pulp

Chlorine is commonly used as a bleach.

Chlorine bleach wood pulp.

Read on to find out what each one does and how to use them safely. About 95 of all bleached kraft pulp is made using chlorine dioxide in ecf bleaching sequences. As a core component of best available technique bat for production of pulp paper and board ecf bleaching will likely continue to dominate. These are toxic carcinogenic and recalcitrant to degradation.

For example the use of elemental chlorine in the bleaching of wood pulp produces organochlorines and persistent organic pollutants including dioxins. According to an industry group the use of chlorine dioxide in these processes has reduced the dioxin generation to under detectable levels. In this process the wood pulp s color is enlightened and whiten. Elemental chlorine free ecf.

The use of chlorine dioxide minimizes the amount of organochlorine compounds produced. Pulp and paper industry currently uses chlorine dioxide bleaching also known as elemental chlorine free or ecf. Traditionally the paper industry used chlorine gas to bleach pulp. Chlorine dioxide ecf technology currently is the most important bleaching method worldwide.

It has been found that bleaching can result in the formation of dioxin in the pulp when chlorine reacts with organic constituents of wood. Recently paper makers have begun using chlorine dioxide to bleach paper. Although preliminary surveys have detected dioxin in pulp mill wastes the scope of the problem is not yet known. There are four types of bleach that woodworkers commonly use.

Bleaching wood subtract color to add life. Bleaching is done to whiten the paper which makes text on it easier to read the chlorine produces several by products including dioxins and furans. Chlorine two part wood bleach oxalic acid and peroxide. For over four decades we have helped the industry navigate the changing landscape of bleaching technologies.

Biobleaching is an important alternative to reduce the use of chlorine. It does not use elemental chlorine gas during the bleaching process and prevents the formation of dioxins and dioxin like compounds carcinogens. Ecf is a pollution prevention technology recognized and accepted globally by such organizations as the united nations environment. Chlorine dioxide serves as a bleaching agent for wood pulp and it is used because chlorine dioxide minimizes the amount of organochlorine compound that are produced in the process.

It is used at moderately acidic ph 3 5 to 6. The process of doing it is called bleaching of wood pulp which is a chemical process. Two part bleach changes the actual color of wood and the other three remove stains.