SU436675A1 - Method of preparing aluminosilicate catalyst for cracking petroleum fractions - Google Patents

Description

one

The invention relates to the manufacture of catalysts for the cracking of petroleum fractions.

A method of preparing a cracking catalyst based on amorphous aluminosilicate by forming an aluminosilicate body, its syneresis, activation, washing, drying and calcining is known.

The purpose of the invention is to obtain a catalyst with increased activity and stability indices.

This is achieved by introducing into the silica-alumina gel after the washing step manganese sulfate in an amount of about 1 weight. %

Example. To 1000 g washed out after the stages of formation, syneresis and activation, aluminosilicate gel in the form of balls, a solution of 3.4 g Mp 504-5P2 O in 100 ml NaO is poured and the gel filled with the solution is kept at room temperature for 24 hours. After that, the solution is drained, and the gel of aluminosilicate is washed by decantation with distilled water for 6-8 hours until complete removal of SO ions, which is controlled by the reaction of the washing water with barium chloride.

2

After washing, the gel is left in the surfactant solution for 1.5 hours in order to give strength to the catalyst (surfactant - surfactant - neutralized Petrov contact) per 1 liter of water 10 g of contact. Then, the gel was staged dried to 170-180 ° C in an oven for 6-7 hours. The dried catalyst is calcined in a muffle furnace at 750-780 ° C for 6-7 hours. Moreover, the temperature is raised to 750-780 ° C gradually over 3-4 hours and cooled gradually to 25 ° C over 4-5 hours. The physicochemical characteristics of the catalyst prepared by the method described above are given in the table in comparison with the catalyst obtained by a known method.

The data in the table show that the catalyst obtained by the proposed method has an activity and stability 8-10 points higher than the catalyst obtained in a known manner. The proposed method does not require special changes and the substantial additional equipment in the existing main scheme for the preparation of ball aluminosilicate catalysts.

The index of catalytic activity,%

Catalytic Stability Index,%

Bulk weight, g / cm

Volume 1 weight, g / cm

Pore volume, cm / g

Porosity,%

Specific surface

The content of whole balls by the method of off

Mechanical wear in airlift

The content of NajO,%

Content Fcj Oz. %

Mg content O%

Syneresis temperature, hail

The content of the target fraction of 2.5-5 mm

The humidity PPK at 800 ° C,%

) Weight taken as an activity index. % distillate yield up to 200 ° С.

Subject of inventions

A method for preparing an aluminosilicate catalyst for cracking petroleum fractions based on amorphous aluminosilicate by forming an aluminosilicate gel,

its syneresis, activation, washing, drying and calcination, characterized in that, in order to increase the activity and stability of the catalyst, about 1 weight is added to the aluminosilicate gel during the washing step. % manganese sulfate.