SU368217A1 - METHOD OF OBTAINING I-BUTANOL - Google Patents

Description

The invention relates to a process for the production of n-butanol, which is used for the production of plasticizers, varnishes, enamels, as a solvent, and so forth.

A method of producing m-butanol from ethyl alcohol at 250-450 ° C in the presence of a catalyst consisting of oxides of magnesium, aluminum, silicon, and a salt or an oxide of an alkali metal is known. The process is carried out at a pressure of 1-20 atm and a space velocity of ethyl alcohol of 0.1-0.3 h -1. The output of n-butane on the reacted ethyl alcohol of 55.5%. The disadvantages of this method are the low volumetric rate of ethyl alcohol and the high reaction temperature, which leads to an insufficient yield of the target product.

The aim of the invention is to increase the yield of the target product.

This goal is achieved by using as a catalyst a mixture consisting of MgO, VAZ {PO 4) 2, NiOH Ni.

It is advisable to use a catalyst of the following composition (in wt.%): MgO 57-70, Vaz (PO) 2 18-37, NiO 3-16 and Ni 1-6.

Ethyl alcohol and hydrogen with flow rates of 34-175 and 30-242 hour-i, respectively, are passed through a catalyst at 145-230 ° C and atmospheric pressure.

In the process, a significant yield of n-butanol is achieved (64% for the ethanol that has reacted) at a sufficiently high space velocity of ethanol.

The catalyst is prepared as follows. Carefully pounded magnesium oxide, trisubstituted barium phosphate, nickel hydroxide and nickel oxalate are displaced. Pounded powdered mixture is poured with water and moved for 10-15 minutes. After settling for 2-3 minutes, the non-seeding part of the suspension is drained, and the remaining sediment is triturated, diluted with water and transferred for 10-15 minutes. The non-seeding portion of the suspension is poured to

the first plum. The precipitate is again triturated, filled with water, stirred for 10-15 minutes, the non-settled part of the precipitate is poured to the first side, and the precipitate is again triturated, etc. These operations are repeated several times until a homogeneous suspension is obtained. Magnesium hydroxide is added to the resulting slurry to bind individual particles. The mixture is stirred at heating for 1.5-2 hours, filtered and air-dried for 20-24 hours, after which it is further dried at 120-140 ° C for 6-8 hours and finally calcined at 400-450 ° C for 4-6 hours.

For normal operation of the catalyst, it is preactivated with hydrogen for 1-2 hours at 350-370 ° C.

Table

The prepared catalyst is tested under the following conditions; temperature 145-230 ° С, volumetric rate of hydrogen 30-242, volumetric rate of ethanol 34-175 hours. The test results are shown in the table.

Subject invention

Claims (2)

1. A method of producing n-butanol by synthesis from ethyl alcohol when heated in the presence of a catalyst, followed by separation of the target products by known methods, characterized in that, in order to increase the yield of the target product, a mixture consisting of MgO, Vaz (PO4 ) 2, NiO and Ni, and the process is carried out in an atmosphere of hydrogen at 145-230 ° C. 2. The method according to claim 1, characterized in that take the catalyst composition (in wt.%): MgO 57-70, Vaz (Р04) 2 18-37, NiO 3-16 and Ni 1-6.