SU550372A1 - The method of producing pentenes - Google Patents

Description

Conversion of a mixture of piperylene on an aluminosilicate catalyst containing 25 sillimanite

absorption of CO2 during oxidative regeneration of the catalyst in the reactor. Basic data are shown in the table. Example 2. On aluminosilicate catalyst containing 25% sillimanite, on a flow-through installation at a temperature of 400 ° C, the volumetric feed rate of the raw material (containing, wt.%: Cis isomer 42,0; trans-isomer 53,5; isoprene 0,8 ; pentenes 1.7) 200 h-i, at atmospheric pressure a condensate of composition was obtained, wt. %:

Hydrocarbons C5 + 1 46

, 5-pentadiene 3,18

trans-1,3-pentadiene 7,14

Unidentified0,306

Isoprene0.93

2-Methylbutene-216.7

rr {Ns-Penten-215,6

p-gran-penten-232,05

2-M. Methylbuten-15,52

Penten-16.95

2 C49,32

S Сз0.76

S Sz0.08

Coke yield for raw materials10

Example 3. An aluminosilicate catalyst containing 25% sillimanite has a high isomerization ability of the resulting n-amylenes in isoamylenes at 400 ° C and a flow rate of the feedstock of the raw material for 100 hours. So, in a laboratory flow installation on an aluminosilicate catalyst containing 25% sillimanite.

at 400 ° С, flow rate 100 hours - at

dilution of piperylene with nitrogen at atmospheric pressure on raw materials containing, in weight. %: 1 {ys-1,3-pentadiene 39.6; grana-1,3-pentadiene 60.1; isoprene 0.28; pentene traces, get the condensate composition, weight. %:

Hydrocarbons Cb + 2.85

g {is-1,3-pentadiene 1,35

grana-1,3-pentadiep

Unidentified

Isoprene0,62

2-Methylbutene-230.0

rg {ms-penten-28.0

p-gran-penten-214,5

2-Methylbutene-19.9

Penten-13,48

S S426.0

S Sz3,3

2 Cr0,3

Coke yield for raw materials13.0

Example 4. On an aluminosilicate catalyst containing 35% sillimanite, on a flow-through installation at 400 ° С, the flow rate of the feed of the raw material is 200 hours; , weight. %:, 3-pentadiene 44.65; grana-1,3-pentadiene 50.5; isoprene 0.86; amylene 4.1 get a condensate composition, weight. %: Hydrocarbons С5 + 0,508

, 3-Pentadiene8,84

trans-1,3-pentadiene 17,95

Unidentified 0.517

Isoprene1.01

2-Methylbutene-216.75

rn "with-Penten-218,0

p-gran-penten-220,0

2-Methylbutene-17,23

Penten-10,945

2 S46.22

E Sz1,07

BSg-Ci1,01

The coke yield on raw materials 12.0 In the examples 1-4, the catalyst restores its activity by oxidative regeneration at 500-550 ° C. As can be seen from the above, the resulting mixtures contain about 79 weight. % of pentenes, which allows them to be subjected to further skeletal isomerization without prior purification; isomerization can be carried out in the same reactor, filling the catalyst for skeletal isomerization of olefins in the course of the feedstock movement downstream of the disproportionation catalyst.

Claims (4)

1. Frost, A. A., Mihnovska, A. A. DAN USSR, vol. 37, 7, 8, 252, 1942. 2.Panchenko G.M. DAN USSR, t. 54, 509, 1947. 3. Sergnenko S. R., Zhdanova N. V. DAN SSSR, t. 104, 5, 737, 1955. 4.Shuykina N. I., Naryshkina T. I., Beresneva L. S. Neftekhimi, t. 6, No. 3, 1966.