SU583996A1 - Method of preparing phenol, isopropyl-benzol, a-methylstyrene and acetophenone - Google Patents

Description

in the amount necessary to obtain a catalyst of a given composition. In the mixer, in the mixer, the filled aluminum-silicate sol is fed into the column with transformer oil where the gel drops in the form of balls. The molded laryk is then subjected to syneresis, activated from the salt, dried and calcined in a 100% water vapor. Catalytic cleavage of the resin in the following way: pure resin) or resin mixed with water vapor (at the rate of 2–20 wt.% Water per resin) is passed at a temperature of 250–450 ° С through a layer of siltimanitseolite-containing alumino-folding catalyst prepared by the described method . The decomposition products are analyzed. The proposed method allows increasing the yield of the target products (phenol, isopropyl nzol, α-methylstyrene, acetophenone) by 20% as compared with the known, and also significantly reduces the content of polymer products in the resin. Example 1. The resin is passed with a bulk velocity of 0.5 hour. through a vertical tubular reactor containing in a fixed bed 36 cm aluminosilicate catalyst containing 10 wt.% sillimanite, and 8 wt. zeolite Na 3 and aluminosilicate - 82% w / w at a temperature of 300 ° C. The reaction products are analyzed by chromatography. The content of the target products is traded on the missing raw material. Similarly, decomposition of the resin is carried out at a temperature of 350, 450 ° C. Chromatographic analysis of phenol resin decomposition products is given in Table. 1. Table 1

Solid dimer

tt-methylstyrene

Ny dky dimer

a-methylstyrene

Complex phenol

XX - unknown products of phenolic resin decomposition.

1.0

0.49 0.28 0.21

 PRI mme R 2. The resin is passed through the mix 300 ° C. Volumetric feed rate

those with water vapor (“to get water and water 0.5 / - to obtain water. Anaproxo conducts raw material loading containing 10% by weight of reagents and at reaction temperatures of 350.250 ° C. water) a layer of aluminosilicate catalyst containing 10 wt.% of sillimanite, 8 wt.% 5 Chromatographic analysis of the products of razoshosh and aluminosilicate - 82 wt.% with temperature of the phenolic resin is presented in table 2.

X - Unknown decomposition products.

Similar results are obtained when using an aluminosilicate catalyst with a holding of 13% by weight of sillimanite and 5% by weight of zeolite. Given in Table. 1 and 2 analyzes of the obtained products of the breakup testify that О1O in the course of catalytic conversion

Spreadsheets

resin in the presence of sillimanite zeolite-containing aluminosilicate catalyst increases on average by 20% the yield of the target product and decreases in the resin of polymer products. In addition, the proposed catalyst is easily regenerated and can work without replacement for a long time.

the formula expresses “neither

I, a method for producing phenol, isotropylamine, Q-methylstyrene and acetophenone by decomposing a phenolic resin - a waste of phenol-acetone production by heating in the presence of a catalyst, characterized in that, in order to increase the yield of the target products, a catalyst containing 10-13% by weight of suillianite, 5-8 wt.% Zeolite, and aluminosilicate - the rest.

2. Clause 1, on tl and h ayusch and the fact that the decomposition of the phenolic resin is carried out at a temperature of 250-450 ° C.

Sources of information taken into account during the examination;

1.Vol-Epshtein A. B., Zharova M. N., Surovtseva V. V. Processing of resin obtained in the production of phenol by the cumene method Chemical industry 2,88,12,1962

2. USSR Author's Certificate No. 121796 C 07 C 7/01, 1959.