Unlock instant, AI-driven research and patent intelligence for your innovation.

Recycle-cracking hydrocracking process

A hydrocracking and process technology, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of insufficient utilization, lower reaction severity, lower operating cost, etc., and achieve strong adaptability of feedstock oil, The effect of improving the reactivity and improving the yield

Inactive Publication Date: 2004-06-30
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process uses a special hydrogen stripping separator containing a hydrogenation zone, the recycled unconverted material is cleaner, and the severity of the reaction is reduced, such as the pressure can be reduced by about 10%, but it still belongs to high-pressure hydrogenation , the operating cost will not be significantly reduced, and the existing equipment and processes cannot be fully utilized, which increases the cost of equipment transformation
In addition, the single-pass conversion rate of this process is relatively low, generally at 15-45wt%, mainly at 10-40wt%

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] This process plan deals with a heavy distillate oil: 90% heavy vacuum distillate oil VGO mixed with 10% coker wax oil CGO, the main properties of the petroleum hydrocarbon material are: specific gravity 0.9045cm 3 / g, distillation range 350°C-565°C, carbon residue 0.40m%, sulfur 2.06m%, nitrogen 2226μg / g.

[0029] The operating conditions of this process plan: reaction pressure 15MPa, hydrogen-oil ratio 1200, partial cycle operation at >350°C, and single-pass conversion rate of 70m%. Mid-oil selectivity is calculated as middle distillate (jet fuel and / or diesel fraction) yield divided by converted liquids yield (100 minus tails).

[0030] The hydrorefining catalyst is 3936 catalyst, and the operating temperature is 370°C.

[0031] Hydrocracking Catalyst A: A Hydrocracking Catalyst Containing Beta Zeolite

[0032] Take by weighing a kind of macroporous acidic amorphous silica-alumina (specific surface 520m 2 / g, SiO 2 35m%, infrared acidity 0.40mmol / g) 61.5g and a ki...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to a cyclic-cracking double cracking agent transform hydrocracking technique, adopting the fist-cracking after-refining flow, and circulating unconverted oil to the second cracking segment and contact the second hydrocracking catalyst for circulative cracking, the first hydrocracking segment adopting beta-zeolite hydrocracking catalyst and the second one adopting Y-zeolite hydrocracking catalyst. It fully uses the double functions of the hydrocracking catalyst and mainly processes heavyweight petroleum hydrocarbon to produce high quality medium fractional oil.

Description

technical field [0001] The invention relates to a hydrocracking process, in particular to a circulating cracking hydrocracking process for processing heavy petroleum hydrocarbon raw materials to produce middle distillates. Background technique [0002] In general, the hydrocracking process can be divided into one-stage method and two-stage method, and the operation mode can be mainly divided into full cycle and one-pass. Specific processes and their modes of operation have matching dedicated catalysts. Precious metal hydrocracking catalysts are generally used in the two-stage process because they are sensitive to sulfur and nitrogen in the raw oil; non-precious metal hydrocracking catalysts are widely used in the one-stage process or single-stage process in addition to the two-stage process . According to the characteristics of the acidic cracking center of the catalyst or the difference in the anti-nitrogen poisoning performance, it can be divided into one-stage series or...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
Inventor 陈松王继锋谷明镝关明华
Owner CHINA PETROLEUM & CHEM CORP