SU1407948A1 - Method of producing low-sulfur electrode coke - Google Patents

Abstract

The invention relates to a method for producing low-sulfur electrode coke and allows to increase the yield of coke and expand the raw material base of coking. The heavy gas oil cracking is preliminarily subjected to vacuum distillation to obtain a fraction that boils away, which is mixed with a sulfurous distillation cracking residue in a mass ratio (0.9-0.8): (0.1-0, 2) and subjected to coking. 3 tab.

Description

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Working is related to the ciuK: ofiy production of M.i.Tiocppnnrroi o electrode coke and can be found in other industries in the industry.

The aim of the invention is to extract the low sulfur electrode petroleum coke.

Example 1. Catalytic cracking heavy gas oil (TGCA) is subjected to vacuum distillation in a laboratory unit, resulting in two fractions: n.k. - 350 ° C and kk 350 ° C, subsequently known as the bottom residue of heavy catalytic cracking gas oil. The output of the vat residue 50%.

The bottoms of heavy catalytic cracking gas oil are smear with the initiating component, sulfur distillation cracking residue (ATP) in a ratio of 0.9: 0.1. The resulting mixture is subjected to coking in a flow-through coking laboratory. Plant capacity for raw materials is 1 l / h, raw material heating temperature is 70 ° С, pressure is 0.3 MPa

The physicochemical properties of petroleum distillate and residual products are listed in Table 1.

The actual coke yield is 27.0% by weight, calculated at 21.3%; coke growth is absolute 5.7%, relative 26.8%; the sulfur content in the coke is 1.4 wt.%,

Example 2 As in Example I, the composition of the mixtures consists of the bottom residue and distillate cracking residue in a ratio of 0.9:: 0.1.

The output of coke actual 20%, calculated 17.8; the absolute increase in KcfKca is 2.2%, relative - 12.3%; coke sulfur content 1.43% o

Froze Same as in Example 1, Component Ratio VAT residue: ATP 0.7: 0.3, Actual coke yield, calculated 24.5, absolute growth of coke 6.0, relative 24.5%, sulfur content in coke 1.5% about

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jljivr HO of the correlation of KDNT-pozipy, m.terially bplis n quality coxel prpellony n. 2; chemical figs. SVYAYSTL comgusipy, composed of TG KK, the remainder of TGKK and LKO, - in table.L.

It can be seen from tel.Z that the addition and 10–30% of the heavy gas oil of catalytic cracking of the initiating additive, sulfurous distillate cracking residue in an amount of 10–30% contributes to an increase in the output of coke by 2.2–6 abs,% and 12, 3-26.8 rel.% At this, the sulfur content in the coke complies with the requirements imposed on this indicator for low-sulfur petroleum electrode coke. An increase in the content of the initiating additive (more than 30%) gives an insignificant increase in coke (Table 3), the sulfur content in the produced coke exceeds the standard one. Coking mixtures containing initiating additives less than 10% does not lead to a noticeable increase in coke.

Thus, the proposed method allows to increase the yield of low-sulfur petroleum electrode coke, expands resources by involving sulfur residues in the raw materials for the production of low-sulfur electrode coke.

Claims (1)

Invention Formula A method for producing low-sulfur electrode coke, which includes delayed coking of heavy catalytic cracking gas oil, characterized in that, in order to increase coke yield and expand the raw coking base, heavy catalytic cracking gas oil is preliminarily subjected to vacuum distillation to obtain a fraction boiling off Bbmie 350 C, which Before coking, it is mixed with a sulphurous distillate cracking residue at a mass ratio of 0.9-0.8-, 0.1-0.2, Table I Sulfur content Components and indicators The ratio of components, wt.% one 100 90 80 10 20 50 50 7.2 10,010,710,9 78.5 70,062,355,2 14.3 20.027.033.9 17,821,331,9 The increase in coke yield compared with the calculated, rel.% 12.3 26.8 6.0 Sulfur content, wt.% 1.40 1.43 1.48 1.65 Ash content, oil 0.03 0.03 0.03 0.04 Density, kg / m 950 965 Molecular weight Sulfur content maso% Ash content, wt.% Fractional composition, ° C nk boils away, about, 5 to 300 ° C 278 340 528 329 386 556 1.6 1.69 1.95 1.58 1.67 1.94 Footprints Footprints Footprints Footprints Footprints Footprints 176 16.5 176 15 176 10.5 284 0.5 284 1.0 284 Table 2 100 80 50 100 20 50 12.0 8.5 10.712.0 39.0 83.5 76.260.0 49.0 8.0 13.028.0 13,128,7 2; 11 1.45 1.60 1.80 0.04 0.04 0.03 0.03 Table3 1,027 975 994 1040 528 329 386 556 176 284 284 284 10.5 0.5 1.0 31 A7 3 77 75 70 96 92 80 Group hydrocarbon composition, wt.%: parafinonaftaIrOL LOZhIIS 7, (, 1 3 50 A6 33 77 75 70 96 82 80