a c 10 + Combination Process Method for Lightening Heavy Aromatics
A technology for lightening heavy aromatics and combining processes, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of low reaction pressure, low reaction conversion rate, no competitive advantage, etc. efficiency, reducing naphthenic hydrocarbons and reducing hydrogen consumption
Active Publication Date: 2016-09-14
CHINA NAT OFFSHORE OIL CORP +3
View PDF8 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Tracing it to its cause, in order to ensure that the liquid does not absorb too many saturated aromatic rings, the reaction pressure adopted is relatively low, and under this condition, the ring-opening of condensed ring aromatics is relatively difficult, so the reaction conversion rate is low, and the disproportionation of toluene and heavy aromatics Compared with transalkylation technology, there is no competitive advantage
[0007] Therefore, as of now, C 10 + Heavy aromatics are not delivering their full value
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～4
[0031] C using a fixed bed reactor 10 + Investigation of combined process of transalkylation of heavy aromatics and hydrogenation of fractions with boiling point ≥178°C. Among them, the heavy aromatic hydrocarbon transalkylation catalyst is prepared according to the method in patent CN102872906A, and the polycyclic aromatic hydrocarbon hydrogenation and lightening catalyst (noble metal Pt content is 0.1%) is prepared according to the method in patent CN103120955A. The feed to the reactor is from the top to the bottom, and the composition of the liquid product is analyzed by gas chromatography.
[0032] C 10 + Heavy aromatics conversion, mixed xylene selectivity, C 9 Aromatic selectivity is defined as:
[0033] C 10 + Conversion of heavy aromatics = (C in the feed 10 + Mass of heavy aromatics - C in the product 10 + Heavy aromatics mass) / C in the feed 10 + Mass of heavy aromatics × 100%
[0034] Mixed xylene selectivity=the quality of mixed xylene in the product / (...
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
| Property | Measurement | Unit |
|---|---|---|
| boiling point | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a combined process method for light conversion of C10<+> heavy aromatics, and mainly provides a production process which can be used for treating C10<+> heavy aromatics and has relatively high C10<+> heavy aromatic conversion rate, liquid recovery rate, mixed xylene selectivity and C9 aromatic hydrocarbon fraction selectivity to solve the problem that C10<+> heavy aromatics cannot be used reasonably. The method comprises the following steps: performing transalkylation reaction between monocyclic ring heavy aromatics and light aromatics on the C10<+> heavy aromatics by virtue of a transalkylation reactor under a non-hydrogen condition at first to realize light conversion of monocyclic ring heavy aromatics to the utmost extent and avoid hydrogenation saturation of monocyclic ring aromatics; and putting fractions of which the boiling point is more than or equal to 178 DEG C in transalkylation products into a hydrogenation reactor to perform hydrogenation light conversion, thereby achieving the aim of producing more high-added-value mixed xylene and C9 aromatic aromatic hydrocarbon fractions while the conversion rate and liquid recovery rate of the C10<+> heavy aromatics are improved.
Description
technical field [0001] The invention relates to the technical field of oil refining, specifically a C 10 + The combined process of lightening heavy aromatics involves the production of high value-added mixed xylenes and C 9 Combined process for aromatic fractions. technical background [0002] Heavy aromatics are a kind of valuable petrochemical resources, which mainly come from C 9 + Aromatics. The composition of heavy aromatics is quite complex, and there are many isomers. The production of fine chemical products by rectification and separation requires high energy consumption and difficult separation; while the C 10 + The content of aromatics is limited; heavy aromatics have not been fully utilized for a long time, and domestic heavy aromatics are basically sold at low prices or blended with fuel oil, which not only causes waste of resources but also pollutes the environment. [0003] CN94104242.1 proposes a reforming C 10 Process and device for the comprehensive ...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/13C07C6/12C07C15/08C07C15/02C10G69/04
Inventor 吴青于海斌杨纪臧甲忠侯章贵范景新丁明刘冠锋姜瑶姜雪丹
Owner CHINA NAT OFFSHORE OIL CORP