SU395350A1 - METHOD FOR ISOLATION BUTEN-1 FROM BUTANE-BOTTLE FACTION - Google Patents

Description

one

A known buten-1 release procedure from the butane-butnylene fraction, consisting in the selective adsorption of 7i-6yTeiHOB on synthetic zeolites such as CaL, followed by desorption of adsorbed carbon species about 1 ;; However, the method is characterized by a large рас propellant consumption проп propa.ka рас, as well as a low purity of butene-i.

In order to achieve the yield and purity of the target product, it is proposed to desorb with n-pentaio.

It is possible to carry out a cyclic process of selective adco; ibtion, all of which can be built in one apparatus (adsorption column)

in stationary ate zeolite 5A.

It is advisable to load an adsorber into the adsorber, and the Tssol-it. The zeolite activation is carried out in a stream of nitrogen at 300-SSOC with a moisture content of 0.037 g / lg-in nitrogen. Bz: The terminal stage of activation to suppress the parasitic catalytic activity of the zeolite is treated with ammonia.

Р1сход: butane-butylene fraction is fed to the adsorber, presented by its co-thermostatic cylindrical apparatus filled with zeolite. At the end of the adsorption, the zeolites are purged with nitrogen to remove from the

the free space of the 1st space of the hydrocarbon system of branched system: n (isobutene and isobutap). Desorption absorbed by hydrolysis is carried out with k-pentane.

Regeneration is carried out after 30-35 cycles with a decrease in the dynamic activity of the zeolite by 50%. The zeolite was regenerated at 300-350 ° C for 6 hours in a stream of nitrogen supplied with an extramolarity of O.

For the supplied parasitic catalytic ak: pznost: 1 zeolite, pi, and when activated, the neolithic processing of amm; aq.

The resulting desorbate is fractionated on a column with an efficiency of 40 theoretical plates. The selected n-pentane is used3} ptstOrno chot. The implementation of this prog.ess is given by butene-1 polymerizable purity with a concentration of 98.5-99.6%.

Approx. To the adsorber (p. 26.; /.:, / 600 mm)

CaA and 6.4 g gshodn. O Buin-butnlenovy fraction of the composition. %:

 3,

ihoHVTri 44,43

i-Bgta; t4,61

BUTS-L23.75

Isobutylene23.65

0.39

For 15 minutes, an adsorber is introduced at a volume rate of 50 hours. In order to remove the absorbed normal hydrocarbons, 4.4 g of n-pentane is fed during desorption at a rate of 40 hours for 10 minutes.

 15

The table lists the composition of the resulting isomers, blow off gases and desorbate.

The weight of isomers is 6.0 g, blowing gas of 0.6 g and de5 sorbate 4.2 g.

Subject invention

The method of dispensing butene-1 from butane-butylene f.racceIi by selective adsorption of pa of synthetic zeolites of the type CaA, followed by desorption with a hydrocarbon, characterized in that n-pentano is desorbed.