METHOD FOR HEAVY HYDROCARBONS HYDROCONVERSION (VERSIONS) Russian patent published in 2017 - IPC C10G47/06 G01N33/28 

FIELD: chemistry.

SUBSTANCE: invention can be used for processing of heavy hydrocarbon feedstock (HHF) into liquid hydrocarbon products with a lower boiling point than the initial feedstock. For HHF hydroconversion to obtain liquid hydrocarbon mixtures, an aqueous solution of catalyst precursor based on molybdenum compound is prepared, emulsified in HHF, the prepared feedstock containing emulsified catalyst precursor is mixed with a hydrogen-containing gas, the mixture is heated up to catalyst precursor, hydroconversion is performed in the upstream feedstock flow and the obtained products are separated in the separator system. Vacuum distillation residue content with an initial boiling point in the range of 500-540°C - C₀ is pre-determined in the feedstock, as well as C, H, N, S, O content in the feedstock and C₁, H₁, N₁, S₁, O₁ in asphaltenes, wt %. Based on these values, the volumetric feedstock rate V, c^-1 and temperature T, K, are calculated by the following formulas: F_max=-2.2961ϕ+ 91.565, where F_max is the limit critical conversion depth, above which the hydroconversion is accompanied by coke formation, wt %, A is pre-exponential factor in the Arrhenius equation, τ - contact time, s, calculated by the formula: τ=1/V, E_a is activation energy, J/mol, ϕ - feedstock feature, calculated by the formula: ϕ=(δ_asph - δ_media)C_R, δ_asph and δ_media are parameters of Hildebrand solubility of asphaltenes and medium, respectively, MPa^0.5, calculated according to the equations:δ_media=-0.0004 β_media² + 0.022 β_media + 20.34, δ_asph=-0.0004 β_asph² + 0.022 β_asph + 20.34, β_media = 50(H-0.125O- 0.2143N-0.0625S)/(0.0833C-1), β_asph = 50(H₁- 0.125O₁- 0.2143N₁-0.0625S₁)/(0.0833C₁-1). To determine the activation energy E_a, two hydroconversion experiments are conducted at two different temperatures T1 and T2, K, content of vacuum distillation residue with an initial boiling point in the range of 500-540°C is determined in hydroconversion products at temperatures T1 and T2 - C_T1 and C_T2, respectively wt %, rate constants k₁ and k₂: k₁= (LnC₀ - lnC_T1)/τ, k₂=(LnC₀ - lnC_T2)/τ, are calculated, and the activation energy is calculated by the formula: E_a=R (lnk₂ - lnk₁)/(1/T₁ - 1/T₂), where R is universal gas constant. Then feedstock hydroconversion is performed at the chosen values of V and T, corresponding to F_max. For invention version,C₁, H₁, N₁, S₁, O₁ content in asphaltenes is not determined, β_asph is not calculated, but δ_asph accepted equal to 20.3, calculating ϕ by the formula: ϕ=(20.3 - δ_media)C_R. Coking value C_R can be determined by calculating by the formulas: C_R = 0.7998 α³ - 8.1347 α² + 35.698 α - 43.251, α = C/6 - N+N/14.

EFFECT: maximum conversion degree at minimum coke formation in a simple manner with a small number of experiments.

4 cl, 9 tbl, 4 ex, 5 dwg