Chlorine Dioxide Bleaching

SKU: C-716Duration: 37 Minutes Certificate Included

Pay-per-view (PPV) format perfect for individual users.

Get immediate access to this interactive eLearning course online. Must be used within 30 days, expires 48 hours after launch.

Great for in-person classroom training or as an alternative to DVD.

Includes printable documents and Convergence Video Player for Windows systems. Content expires after 1 year.

Ideal for corporate licensing and volume users who also need administrative tracking and reporting on training.

Get this interactive eLearning course into your LMS or learn how you can leverage our LMS to deliver training to your workforce.

Need multiple courses or have lots of users? Just let us know a little more about what you need and we’ll get you some great volume pricing.

 Need help deciding? Compare delivery formats.

Course Details

Specs

Training Time: 37 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Chlorine dioxide is an excellent bleaching chemical because it is very selective for lignin. Because of this, its use has expanded greatly over the last few decades. This course discusses the purpose of chlorine dioxide bleaching and the basics of chlorine dioxide bleaching chemistry. It also describes the equipment used in chlorine dioxide bleaching, as well as the typical ECF bleaching sequences such D0, D1, and D2 along with their differences.

At the end of this module, you will be able to:

  • Describe the purpose of chlorine dioxide bleaching
  • Describe the basics of chlorine dioxide bleaching chemistry
  • Explain how pH affects chlorine dioxide bleaching
  • Explain how temperature affects chlorine dioxide bleaching
  • Identify and describe equipment used for chlorine dioxide bleaching
  • Identify typical ECF bleaching sequences
  • Identify and describe differences between D0, D1, and D2 stages
  • Describe modification required for hardwood bleaching
  • Describe the safety hazards and safety guidelines for chlorine dioxide

The following key questions are answered in this module:

Why is chlorine dioxide generated onsite?
Chlorine dioxide is unstable as a gas and decomposes explosively at low pressures

What is ECF bleaching?
ECF stands for elemental chlorine (Cl2) free. Bleaching with chlorine dioxide is considered ECF

What is the best pH for a D0 stage?
The best results for a D0 stage are achieved with a final pH 3-4

How should chlorine dioxide be distributed among the different D stages.
The chlorine dioxide should be distributed to optimize the effect on brightness. A common distribution is 40-50% in D0, 30-40% in D1 and 15-25% in D2. If there are only two stages, ClO2 addition is usually split evenly.

What are some safety concerns with using chlorine dioxide?
One of the biggest concerns is the potential for explosions. Also, chlorine dioxide can be a serious threat to the respiratory system and exposure to high concentrations can be fatal.

Below is a transcript of the video sample provided for this module:

Chlorine dioxide is an excellent bleaching chemical because it is very selective for lignin. However, it is relatively expensive, so chlorine dioxide was originally used in later bleaching stages where there is low lignin content to produce pulp with a high, stable brightness without compromising strength. Over the last few decades, the use of chlorine dioxide has expanded. At first, chlorine dioxide was used to protect pulp strength by replacing 5% to 10% of the chlorine. It was later found that substituting up to 50% chlorine dioxide improved the delignification efficiency. To reduce the environmental impact of using elemental chlorine, chlorine dioxide has essentially replaced chlorine and become the foundation of elemental chlorine-free, or ECF bleaching. Because chlorine dioxide reacts much differently with pulp than chlorine, the production of harmful dioxins is less than 2% of that created by chlorine.

Use the additional resources and links below to learn more about this topic:

Customer Q&A

Ask a Question

Sorry, we're missing some information

I would like to have several employees take multiple courses. How can I set that up?

We're in the process of making bulk course and multiple user purchases easier. But for now, you can order multiple courses and contact us with details on who you'd like to assign courses to. We can set up each user's training plan and make sure everyone gets the eLearning assignments they need.

Can I get a free full-length preview of a course to see what this course covers?

While we do our best to offer details on course contents, we don't normally offer full-length previews. But please contact us with more details for a better understanding of what your organizaton needs and how we can help.

Do I get a certificate when I complete a course?

Yes. All of our courses allow you to print a completion certficate upon successfully passing the integrated test at the end of each eLearning course.

How do I log in to take a course that I have already paid for?

You'll receive an email with login details moments after you purchase your pay-per-view (PPV) course. Just click the login link and enter the user name and password provieded.

Do you have courses in different languages?

Yes. While all of our courses are originally produced in English, we develop many courses in a growing number of languages, including Chinese, Dutch, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Tamil, and Thai. Availabl languages are normally displayed in the Course Details section on each course page.
Added to Cart! Click here to view your cart.