The invention relates to a method for producing magnetite with a purity of no less than 90% and higher than 98%, by oxidation of pulverized wustite (iron oxide), at temperatures ranging from 200 C. to 800 C., with the addition of water in liquid or steam form, in counter-current or concurrently, in an externally heated reaction chamber with a controlled atmosphere. The amount of water used to oxidize the wustite being 60 to 500 ml per kilogram of wustite, the grains of wustite powder are injected into the reaction chamber having a size no greater than 100 m for optimal reaction.

The invention provides a method for producing a peroxymonosulfuric acid solution with high stability, including the steps of mixing 35 mass % or more of hydrogen peroxide and 70 mass % or more of sulfuric acid to react them, cooling the reaction solution to 80 C. or lower within five minutes after initiation of the mixing step, and diluting the reaction solution with water four times or more as much as the reaction solution by mass.

An automatic ammonia hydroxide deployment system comprises an ammonia hydroxide deployment device and an automatic ammonia hydroxide deployment controlling device. The ammonia hydroxide deployment device includes a chamber for storing ammonia hydroxide, an ammonia pipe and a water pipe. The automatic ammonia hydroxide deployment controlling device includes an electrical conductivity meter, a liquid level sensor and an operating controller. The electrical conductivity meter is for detecting an electrical conductivity of the ammonia hydroxide in the chamber. The operating controller is configured to obtain an ammonia concentration of the ammonia hydroxide according to the electrical conductivity of the ammonia hydroxide. The operating controller adjusts ammonia gas flowing into the chamber according to whether the ammonia concentration is less than a predetermined threshold or not, and adjusts water flowing into the chamber according to whether the liquid level is lower than a predetermined lower threshold or not.

An automatic ammonia hydroxide deployment system comprises an ammonia hydroxide deployment device and an automatic ammonia hydroxide deployment controlling device. The ammonia hydroxide deployment device includes a chamber for storing ammonia hydroxide, an ammonia pipe and a water pipe. The automatic ammonia hydroxide deployment controlling device includes an electrical conductivity meter, a liquid level sensor and an operating controller. The electrical conductivity meter is for detecting an electrical conductivity of the ammonia hydroxide in the chamber. The operating controller is configured to obtain an ammonia concentration of the ammonia hydroxide according to the electrical conductivity of the ammonia hydroxide. The operating controller adjusts ammonia gas flowing into the chamber according to whether the ammonia concentration is less than a predetermined threshold or not, and adjusts water flowing into the chamber according to whether the liquid level is lower than a predetermined lower threshold or not.

The present invention relates to cylinder packages utilized in the delivery of highly toxic and/or flammable compounds to semiconductor manufacturers. More specifically, the present invention provides a cartridge adapted to removably attach to the gas outlet of a gas discharge passageway in a cylinder valve provided on a toxic gas containing cylinder package, the cartridge comprising a cylindrically shaped housing having at least one end fitted with a barrier member permeable to the toxic gas contained within the cylinder package and the housing containing a toxic-gas getter material.

An installation for an aircraft having a tank delimiting a volume with a high point, through a wall of the tank, an evacuation channel arranged near the high point, a container in which dihydrogen is present and which is arranged in the volume, and a catalyzer configured to catalyze an oxidation reaction of the dihydrogen with the air in the tank, wherein the catalyzer is fastened at the evacuation channel.