Product name: 1333-74-0

CAS: 1333-74-0

Molecular formula: H2

Molecular weight: 2.02

EINECS: 215-605-7

Introduction

Hydrogen is a chemical element that ranks first in the periodic table. The usual single substance form of hydrogen is hydrogen gas. It is a colorless, tasteless, odorless, highly flammable gas composed of diatomic molecules. Hydrogen gas is the lightest gas. Hydrogen is a chemical element with atomic number 1, chemical symbol H, and ranks first in the periodic table.

Hydrogen Properties

Chemical properties

Colorless, odorless, tasteless, non-toxic flammable gas.

Uses

1. Used as high-energy propellant in the aerospace industry

2. Used in the manufacture of hydrochloric acid, synthetic ammonia, metal cutting, welding, metal extraction, purification of semiconductor materials, etc.

3. Used as raw materials for synthetic ammonia, synthetic methanol, synthetic hydrochloric acid, metallurgical reducing agent, hydrodesulfurization agent in petroleum refining, etc.

4. Used as diluent gas, carrier gas and reaction gas in large-scale integrated circuits and electronic devices, and can also be used for the smelting of precious metals and the reduction of metal oxides

5. Used for gas chromatography carrier gas, combustion bottles of hydrogen flame detectors, electron tubes, semiconductor materials, integrated circuits, etc.

6. GB 2760-96 lists it as a processing aid in the food industry. Such as used for oil hydrogenation, etc.

7. Used in various processes in oil refining and petrochemicals. In the chemical industry, it is used as a raw material for synthetic ammonia, polyvinyl chloride, octanol, oil hardening, hydrogen peroxide and other products. In the metallurgical industry, it is used for metal cutting, hydrogen-oxygen flame welding, the production of non-ferrous metals such as tungsten, molybdenum, titanium, etc. High-purity hydrogen is also used as a reducing gas and protective gas in processing. In the electronics industry, high-purity hydrogen is used in the production of electronic materials, semiconductor materials and devices, integrated circuits, and vacuum devices. With the development of liquid hydrogen production, its application in aerospace and rocket industries is becoming more and more extensive.

Production method

1. Generally, when salt is electrolyzed, hydrogen is produced at the cathode. After water washing, compression, alkali washing, freezing and drying, the purity can reach 99.8%.

2. At present, the industrial methods of hydrogen production include water electrolysis, electrolysis of salt water to produce sodium hydroxide as a by-product hydrogen, and conversion of mineral fuels (natural gas, oil, etc.) to produce hydrogen. Electrolysis method Electrolysis of salt water solution to produce caustic soda as a by-product method When electrolyzing salt (sodium chloride) aqueous solution, chlorine is produced at the anode and hydrogen is produced at the cathode. After water washing, compression, alkali washing, freezing and drying, hydrogen with a purity of 99.8% is obtained. Its NaCl+H2O[electrolysis]→0.5Cl2+0.5H2+NaOH Anode reaction Cl-→0.5Cl2↑+e Cathode reaction H2O+e→OH-+0.5H2↑ Water electrolysis method When a certain voltage of direct current is passed through a water electrolysis cell, water is decomposed. Oxygen is precipitated at the anode and hydrogen is precipitated at the cathode. The fossil fuel conversion hydrogen production method uses various fossil fuels - natural gas, petroleum and its products, coal to produce hydrogen, and its process has great similarities. Its basic process is: steam reforming of hydrocarbons - including steam reforming of natural gas, light oil, etc.; partial oxidation method - partial oxidation of liquid raw materials such as crude oil and heavy oil; gasification of coal.