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

A hydrocracking method for concurrently producing heavy naphtha and tail oil

A technology for hydrocracking and heavy naphtha, applied in the field of coal chemical industry, can solve the problems of large investment, insufficient product demand and high cost

Active Publication Date: 2020-02-28
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, for enterprises that need to simultaneously produce heavy naphtha and high-quality product tail oil, the above-mentioned scheme has shortcomings: (1) the yield of heavy naphtha under the one-pass process is not enough to meet the product demand of the enterprise; (2) the diesel oil Or the circulation of middle distillates to the second cracking reactor is equivalent to adding a section of hydrocracking unit, which requires additional reactors and circulating hydrogen systems, and the original circulating hydrogen system needs to be modified. This part is relatively expensive and relatively expensive. Big

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A hydrocracking method for concurrently producing heavy naphtha and tail oil
  • A hydrocracking method for concurrently producing heavy naphtha and tail oil
  • A hydrocracking method for concurrently producing heavy naphtha and tail oil

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0060] Embodiment 1: The final boiling point of the external middle distillate oil outside the system is 280-320 ° C, the hydrocracking reactor contains 2 catalyst beds, and the external middle distillate oil from outside the system is mixed Introduced between the first catalyst bed and the second catalyst bed. In this Embodiment 1, it is more preferable that the initial boiling point of the external middle distillate oil other than the system is 165 to 180°C.

specific Embodiment approach 2

[0061] Embodiment 2: The final boiling point of the external middle distillate oil outside the system is 280-320 ° C, the hydrocracking reactor contains 3 catalyst beds, and the external middle distillate oil from outside the system is mixed Introduced between the second catalyst bed and the third catalyst bed. In this Embodiment 2, it is more preferable that the initial boiling point of the external middle distillate oil other than the system is 165 to 180°C.

specific Embodiment approach 3

[0062] Embodiment 3: The final boiling point of the external middle distillate oil outside the system is 280-320°C, and the external middle distillate oil from outside the system is introduced into the third catalyst bed and the fourth catalyst bed between. In this specific embodiment 3, it is more preferable that the initial boiling point of the external middle distillate oil other than the system is 165 to 180°C.

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

No PUM Login to View More

Abstract

The invention relates to the field of coal chemical industry and discloses a hydrocracking method capable of producing heavy naphtha and tail oil. The method comprises the steps as follows: raw oil sequentially passes through a hydrofining reactor and a first hydrocracking reactor for reactions in the presence of hydrogen, and a hydrocracked effluent is obtained; then, the hydrocracked effluent isintroduced into a separation device to be sequentially subjected to gas-liquid separation and fractionation, and a light naphtha fraction, a heavy naphtha fraction, a kerosene fraction, a diesel fraction and a tail oil fraction are obtained; at least part of kerosene fraction and / or at least part of diesel fraction are / is introduced into a first catalyst bed of the hydrocracking reactor to be circulated. The method is convenient, low in energy consumption and hydrogen consumption and capable of producing high-quality tail oil and heavy naphtha products.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a hydrocracking method for concurrently producing heavy naphtha and tail oil. Background technique [0002] Ethylene is the basic raw material of petrochemical industry. With the development of the national economy, my country's ethylene production capacity has grown rapidly, but it still cannot meet the domestic market's demand for ethylene, and about half of it still needs to be imported. Therefore, it is an important direction for the development of the petrochemical industry to develop the technology to increase the production of olefins, the basic raw material of petrochemicals. [0003] Hydrocarbon steam cracking is the main means of producing ethylene. In the process of steam cracking to produce ethylene, the cost of raw oil accounts for a large proportion of the total cost, generally more than 60%. Therefore, the optimal selection of feedstock oil is an important f...

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 Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1044C10G2300/1048C10G2400/20
Inventor 赵阳孟勇新赵广乐毛以朝龙湘云
Owner CHINA PETROLEUM & CHEM CORP