Lithium aluminum hydride fully sealed reaction, filtration, washing and drying integrated machine

Lithium aluminum hydride is a special fine chemical product with extremely strong reducing properties. In organic synthesis, it can reduce aldehydes, ketones, enones, cyclic ketones and bicyclic ketones, as well as carboxylic acid derivatives such as anhydrides, cyclic anhydrides and acyl chlorides. It can also reduce primary amides, tertiary amides, aliphatic nitro compounds, esters, lactones, sulfur-containing compounds, sulfonic acids, halogenated aromatic hydrocarbons and epoxides. It has demonstrated excellent characteristics in regional or stereoselective restoration. With the rapid development of China's economy, the demand for this product is increasing day by day.

Lithium aluminum hydride is a special fine chemical product with extremely strong reducing properties. In organic synthesis, it can reduce aldehydes, ketones, enones, cyclic ketones and bicyclic ketones, as well as carboxylic acid derivatives such as anhydrides, cyclic anhydrides and acyl chlorides. It can also reduce primary amides, tertiary amides, aliphatic nitro compounds, esters, lactones, sulfur-containing compounds, sulfonic acids, halogenated aromatic hydrocarbons and epoxides. It has demonstrated excellent characteristics in regional or stereoselective restoration. With the rapid development of China's economy, the demand for this product is increasing day by day.

Lithium aluminum hydride is generally produced by the reaction of lithium deuterium with aluminum bromide. Aluminum bromide has relatively active chemical properties, hydrolyzing upon contact with water and decomposing upon heating. Moreover, the reaction conditions have a significant impact on the active hydrogen content of the final lithium aluminum hydride. Poor temperature control can easily lead to boiling over and cause danger. Lithium aluminum hydride producers urgently need a convenient, fast and highly active deuterium content preparation method for lithium aluminum hydride.

It is well known that reaction, filtration and drying are three important unit operations in industries such as chemical engineering, medicine and food. Generally, three unit equipment - reaction vessels, filters and dryers - are required to complete them. These three unit devices each have their own supporting equipment. Due to their large floor space and high cost, the handling or transportation of materials between units is rather troublesome. Not only is the labor intensity high, but it is also prone to material loss and waste. For flammable, explosive, toxic or highly toxic materials, or biological products, medicines, foods, etc. that are not allowed to be contaminated, closed operation is required. At this point, the difficulty of material transportation among the reaction, filtration and drying devices becomes even higher. Sometimes, this often leads to the entire set of devices being unable to operate normally or having a high labor intensity, a long production cycle, high energy consumption and low efficiency, which affects product quality.

In response to market demands and customer requirements, our company has carried out extensive design and research and development work. Finally, we have successfully developed a conical three-in-one multi-functional device for filtration, washing and drying, and have successfully applied for a patent (patent number: (ZL 202022908020.2, ZL 202022906527.4) has achieved significant improvements in equipment technical performance. From structural design to application, it closely follows the corresponding regulatory requirements of the fine chemical industry and has been maturely applied in many fine chemical enterprises.

Lithium aluminum hydride special fine chemical products

The production process for preparing a dedicated fully enclosed reaction filtration, washing and drying machine

The lithium aluminum hydride products prepared by the fully enclosed reaction filtration, washing and drying machine have a high content, mild reaction conditions and higher safety. The specific production process steps are:

Under reflux conditions, add ether and lithium hydride to the fully sealed reaction filtration washing dryer, stir evenly, then add anhydrous aluminum trichloride and continue to stir.

(2) Raise the temperature to 20-30℃ and react for 5-8 hours.

(3) The ether is filtered, washed and distilled in a fully sealed reaction to obtain the finished product of lithium aluminum hydride.

Technical advantages of the fully enclosed reaction filtration washing and drying machine dedicated to the preparation of special fine chemical products of lithium aluminum hydride

(1) The fully enclosed system provides an excellent operating environment and is particularly suitable for handling toxic, flammable, explosive and other hazardous products, as well as fresh and delicious foods, biological products and medicines that are not allowed to be contaminated.

(2) It can be used for three operations: reaction, filtration and drying, enabling the functions of the three unit devices to be accomplished on this single device. As a result, the equipment cost, floor space, labor intensity and energy consumption are all significantly reduced.

(3) It can both concentrate and filter. Especially when it is necessary to wash the materials, the materials can be concentrated first and then thoroughly washed in a suspended state. Finally, they can be pressed and filtered. This can reduce the handling of materials, minimize waste, and there is no need for slurry during washing. The quality of the processed products is very high.

(4) Multi-functional in one machine, it can complete various operations such as reaction, extraction, filtration, repeated filtration and washing, and drying within one machine, and directly obtain the finished product.

(5) It has a large operational flexibility and can adjust the operation cycle by regulating the filtration pressure difference, rotational speed, and screw extrusion lead, etc., to adapt to changes in process conditions.