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

Co-current flow type hydrocracking method

A hydrocracking and flow-type technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problem of low selectivity of middle distillates, achieve protection activity and selectivity, increase yield, and improve The effect of partial pressure

Active Publication Date: 2012-12-05
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a co-current hydrocracking method on the basis of the prior art to solve the problem of low middle distillate selectivity of the hydrocracking catalyst in the single-stage serial hydrocracking method

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
  • Co-current flow type hydrocracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] When the reaction pressure is 14.5MPa, the reaction temperature of the hydrofinishing section is 380°C, the reaction temperature of the hydrocracking section is 370°C, and the volume space velocity (for fresh raw materials) of the hydrofinishing section is 1.8h -1 , the volumetric space velocity of the hydrocracking section (for all feeds in the hydrocracking section) is 1.3h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test, the ratio of fresh raw material oil entering hydrofinishing reactor and hydrocracking reactor is 9: 1, tail oil fraction is all recycled back to Hydrocracking reactor. H in the reaction atmosphere of the hydrocracking reactor 2 S partial pressure is 0.015MPa, NH 3 The partial pressure is 0.003MPa. The test results are shown in Table 2. Based on 100% fresh raw materials, the yields of jet fuel and diesel oil are 41.82% and 38.50%, respectively, the total yie...

Embodiment 2

[0034] When the reaction pressure is 14.5MPa, the reaction temperature in the hydrofinishing section is 380°C, the reaction temperature in the hydrocracking section is 380°C, and the volume space velocity (for fresh raw materials) in the hydrofinishing section is 1.8h -1 , the volumetric space velocity of the hydrocracking section (for all feeds in the hydrocracking section) is 1.3h -1 Under the reaction condition, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test, the ratio of fresh raw material oil entering hydrofinishing reactor and hydrocracking reactor is 4: 1, tail oil fraction is all recycled back to Hydrocracking reactor. H in the reaction atmosphere of the hydrocracking reactor 2 S partial pressure is 0.03MPa, NH 3 The partial pressure is 0.006MPa. The test results are shown in Table 3. Based on 100% fresh raw materials, the yields of aviation fuel and diesel oil were 42.43% and 39.04%, respectively, the total...

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 a co-current flow type hydrocracking method. According to the method, fresh raw material oil is concurrently introduced to a hydrorefining reactor and a hydrocracking reactor in a co-current flow manner; the reaction effluent of the hydrorefining reactor is separated to obtain a light naphtha fraction, a heavy naphtha fraction, a middle fraction oil and a tail oil fraction; all or part of the tail oil fraction enters the hydrocracking reactor, and the reaction effluent of the hydrocracking reactor and part of the raw material oil enter the hydrorefining reactor. In the prior art, under an ammonia-free environment, cracking activity of a hydrocracking catalyst is too strong so as to cause secondary cracking of more middle fraction oil. With the method of the present invention, the problem in the prior art is prevented so as to effectively improve yield of the middle fraction oil. In addition, partial pressure of H2S is improved, and activity and selectivity of the sulfided hydrocracking catalyst are effectively protected.

Description

technical field [0001] The invention belongs to a hydrocracking method for obtaining low-boiling distillate hydrocarbon oil in the presence of hydrogen. Background technique [0002] With the deterioration of crude oil quality year by year and the increasingly stringent environmental protection requirements worldwide, the hydrocracking process, as one of the main means of crude oil secondary processing and heavy oil lightening, has strong raw material applicability, flexible production plan, liquid With high product yield and good product quality, it is playing an increasingly important role in the deep processing of sulfur-containing and high-sulfur crude oil to produce clean fuels, and its application range is becoming more and more extensive. [0003] In recent years, the market demand for various oil products, especially high-quality middle distillate products, has continued to grow, and the pressure on refineries to produce high-quality middle distillate products has al...

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): C10G67/00
Inventor 胡志海陈元君董建伟董松涛赵阳王子文龙湘云聂红
Owner CHINA PETROLEUM & CHEM CORP