On the preparation of ferric chloride. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

On the preparation of ferric chloride. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

Comments on the article

In "Radio" (1990. No. 8. P. 74) a note by A. Sergienko and V. Ivanenko "Preparation of ferric chloride" was published, which describes how to prepare iron trichloride for etching circuit boards under amateur conditions. The essence of this method is the treatment of ordinary rust with hydrochloric acid. However, gaining the required amount of rust is not as easy as it seems. In addition, it inevitably contains a lot of "dirt" that spoils the final product.

I solved this problem chemically. When ferrous sulfate is calcined on fire (it can be purchased at stores selling household chemicals or garden supplies), water first evaporates from it and a white mass of anhydrous iron sulfate salt remains. With further heating (at a temperature of more than 480 ° C), the mass decomposes with the release of gaseous sulfur oxides, which form sulfuric acid vapors in the air. Therefore, work must be carried out under a good hood or in the open air. In the process of calcination, it is necessary to crush the sintering mass.

After some time, it turns into a fine rust powder of fairly high purity. Store the powder in an airtight container, as it is hygroscopic and because of this it cakes into lumps.

The chemical substantiation of the process of obtaining rust is set out in Glinka's textbook N. L. "General Chemistry" (for example, 1975 on p. 680).

Author: V.Zabironin, Lutsk, Ukraine

See other articles Section Ham Radio Technologies.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Natural eco-friendly glue 24.07.2012

Most of the things around us are glued together. Scientists at the Fraunhofer Institute (UMSICHT) see this as a problem, since adhesives are still predominantly made from petroleum feedstocks. Thus, only in Germany in 2010 more than 820 thousand tons of glue were produced. However, adhesives can be made from renewable raw materials such as proteins, natural rubber, starch or cellulose. Researchers at UMSICHT are working to develop new formulas for the adhesive needed to make shoes, cars, airplanes, wind turbine blades, self-adhesive stickers, plaster, and more.

Scientists are developing a new pressure-sensitive adhesive for industrial applications. Such glue is suitable for a lot of household items: patches, adhesive tapes, labels, etc. The requirements for this type of adhesive are quite high: it must retain its properties at room temperature for a long time, stick together at low pressure, but at the same time be easily peeled off surfaces. German researchers have focused on the development of a polylactic acid polymer adhesive. This biological material is inexpensive and is produced on an industrial scale, which in the future will make it possible to abandon the use of oil as a raw material.

However, the properties of lactic acid polymer are fundamentally different from the polymers used today, in particular from polyacrylates and styrene. This means that scientists must develop an entirely new formula for the adhesive. This is quite possible - nature is an example of this. So, the mollusk Dosima fascicularis produces a special glue with which it is attached to the bottom of ships. This superglue is so strong that it is almost impossible to unhook the clam from the boat even with strong solvents. At the same time, it has a special property - it sticks together even under water.

German scientists are trying to create a similar water-dispersion adhesive, the components of which are dissolved in water. Researchers are currently trying to figure out which amino acids make up biological superglue proteins. If successful, it will be possible not only to abandon oil raw materials and improve household items such as adhesive tape, but also create, for example, medical adhesives for closing wounds and “repairing” broken bones.

Other interesting news:

▪ Scientists have explained the whiteness of the snow

▪ GPU chip design

▪ New type of atomically thin carbon material discovered

▪ Seasickness indicator

▪ New 3,5- and 4,5-bit analog-to-digital converters

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the Electrician website. PUE. Article selection

▪ article How electromagnetic fields of their radiation affect the body. Basics of safe life

▪ article Why Brazilian football player Giovane Elber once taped his mouth shut? Detailed answer

▪ Anemone article. Legends, cultivation, methods of application

▪ article Fluorescent lamps. Encyclopedia of radio electronics and electrical engineering

▪ article Rabbit from sawdust. Focus Secret

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews