Method for preparing high dispersing white carbon black with ammonia precipitation method

Abstract

The invention belongs to the field of chemical industry, particularly relates to a method for preparing high dispersing white carbon black with ammonia precipitation method. The method comprises the following steps of: (1) simultaneously adding ammonium hydrogen carbonate, water glass solution and dispering agent to a reaction kettle in a certain proportion, and quickly heating till the temperature of 70-90 DEG C; (2) carrying out heat preservation and stirring, controlling the stirring speed to be 60-100 rpm, simultaneously discharging ammonia gas in the reaction process, and obtaining loose precipitate white carbon black after finishing the reaction; (3) mixing the ammonia gas generated in the reaction and the smoke gas carbon dioxide generated in the process of preparing the water glass solution and simultaneously absorbing with water, and obtaining ammonium hydrogen carbonate solution after the reparation; (4) filtering the obtained precipitate white carbon black after the reaction under the condition of vacuum, wherein the filtrate is recycled to prepare sodium carbonate, and obtaining the high dispersing white carbon black after washing, drying, crashing and filtering the filter cake. The method is simple in technology and environment-friendly, thereby reducing the production cost and improving the product performance; and the quality is stable and reliable.

Description

A method for preparing highly dispersed white carbon black by ammoniation precipitation technical field The invention belongs to the field of chemical industry, and in particular relates to a method for preparing high-dispersion white carbon black by using water glass and ammonium bicarbonate as main raw materials by ammonification precipitation. The product is a reinforcing material for the rubber industry and is mainly used for rubber products, Agricultural chemicals, household chemicals, binders and paper fillers and other fields. Background technique White carbon black is an important inorganic fine chemical product developed by non-metallic quartz ore. It is a general term for white powder amorphous silicic acid and silicate products, also known as hydrated silica. It has good chemical inertness and physical inertness. It is a non-toxic chemical additive with excellent performance, which is widely used in rubber products, pesticides, daily necessities, cement and pape...

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Problems solved by technology

Due to the high price of raw materials used in the precipitation method, the relatively complicated production process and equipment, and the high cost of waste water and waste gas treatment, the current product cost is high and the price is high.

The current method of preparing white carbon black is to react with concentrated sulfuric acid and sodium silicate aqueous solution under heating conditions, and then obtain the finished product after precipitation, filtration and drying. In this method, not only the consumption of raw materials and energy is large, but also A large amount of sulfuric acid and sodium sulfate waste liquid with low concentration is produced, and the recycling cost is high. If it is not recycled effectively and discharged randomly, it will cause considerable pollution to the environment

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