19 results about "Calcium hydroxide" patented technology

An alkali metal ion source with a moderate rate of release of the ion (e.g. potassium) is formed by a method that includes: 1) combining an particulate ore that contains at least one of an alkali metal ion-bearing framework silicate (e.g. syenite ore) with at least one of an oxide and hydroxide of at least one of an alkali metal and alkaline earth metal such as calcium hydroxide; 2) milling the mixture of these two components optionally, with water, optionally, milling the dry components separately and blended thereafter, optionally, with water; 3) forming a mixture by adding water to the solid mixture after milling, if water was not added before milling; 4) exposing the mixture to an elevated temperature and pressure to form a gel that includes silica and the alkali metal of the framework silicate.

The invention discloses a preparation method of a cobalt oxide coated nickel hydroxide composite material for an alkaline rechargeable battery. The preparation method comprises the following steps: (1) preparing nickel chloride, cobalt sulfate and yttrium sulfate into nickel cobalt yttrium saline solution and injecting a potassium hydroxide solution and an ammonium hydroxide complexing agent intoa reaction kettle to perform chemical precipitation to obtain a yttrium doped spherical nickel hydroxide precursor; (2) weighing the defined amount of yttrium doped spherical nickel hydroxide precursor, putting into a sealed oxidizing reactor and inflating O2 to perform oxidization; (3) adding a Mg(OH)2 alkaline water solution into the oxidizing reactor after reaction finishes to perform thermal-insulation treatment. According to the alkaline rechargeable battery spherical nickel hydroxide material prepared by the preparation method disclosed by the invention, electrical conductivity and cycling stability of spherical nickel hydroxide are greatly improved; when the spherical nickel hydroxide material is applied to the alkaline rechargeable battery, the battery has the advantages of high specific capacity and longer service life.

The invention discloses an emission technology of vapor containing nitrogen oxide and tar. The emission technology comprises the following steps: opening a cutoff valve, a circulating water pump and an exhaust fan, wherein the circulating water pump starts a water circulation process; opening a discharging valve and releasing calcium hydroxide into water in a stepped overflow pool, and opening thedischarging valve when the pH value of the water in the stepped overflow pool is smaller than or equal to 8.0; closing the discharging valve when the pH value of the water in the stepped overflow pool is greater than or equal to 8.7; when an adjustment target is to prevent haze and the temperature of exhaust gas is greater than or equal to 90 DEG C, stopping the temperature-regulating operation;opening the temperature-regulating operation again when the temperature of the exhaust gas is smaller than 80 DEG C; stopping the temperature-regulating operation again when the adjustment target is to prevent thermal pollution and the difference value between the temperature of the exhaust gas and the atmospheric temperature is smaller than 3 DEG C; opening the temperature-regulating operation when the difference value between the temperature of the exhaust gas and the atmospheric temperature is greater than 6 DEG C. The emission technology disclosed by the invention can efficiently remove sulfur dioxide and nitrogen oxide from water, the weak alkalinity of water is maintained on the premise of ensuring safety and the emission temperature of the exhaust gas is correspondingly controlled according to different adjustment targets.