Preparation method of initiating solvent for direct liquefy of coal

A technology of direct coal liquefaction and solvent, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry. It can solve the problems of difficult to meet the requirements and low output, and achieve good hydrogenation performance.

Active Publication Date: 2006-11-22
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
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Problems solved by technology

Decrystallized anthracene oil or creosote oil in the coal tar fraction is an excellent starting solvent raw material, but due to their low yield, a large amount of starting solv...

Method used

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  • Preparation method of initiating solvent for direct liquefy of coal

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Embodiment Construction

[0020] The method provided by the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited thereto.

[0021] Such as figure 1 Shown, the petroleum distillate as raw material is at first mixed with vulcanizing agent dimethyl disulfide (DMDS) in raw material configuration tank 1, and the ratio that it mixes is 1.5wt% of raw material, is delivered to metering by low-pressure circulating pump 2 then Tank 3, and sent to the raw material preheater 6 through the low-pressure circulation pump 4 and high-pressure circulation pump 5 for preheating; after the hydrogen is boosted and preheated by the hydrogen compressor 8 and the hydrogen preheater 7, it enters together with the raw material Raw material preheater 6; the temperature of the material at the outlet of the preheater is generally about 200°C; the raw material enters from the top of the fixed-bed hydrogenation reactor 9 together with hydrogen for h...

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Abstract

The invention discloses a preparing method of coal direct liquefied initial solvent, which comprises the following steps: adopting oil distillate with distillation range at 220-538 deg.c, specific gravity at 1.01-1.10 g per cm3 and condensed-nuclei aromatics content over 70 percent; preparing coal direct liquefied initial solvent with distillation range at 220-480 deg.c, specific gravity at 0.95-0.99 g per cm3 and condensed-nuclei aromatics content over 80 percent through catalytic hydrogenation course. The method possesses excellent hydrogen supplying property and fitful viscosity, which can satisfy the direct liquefied need for coal slurry.

Description

technical field [0001] The invention relates to a coal direct liquefaction process, more specifically, a preparation method for an initial solvent used in a coal direct liquefaction process. Background technique [0002] In the direct coal liquefaction process, the role of the solvent is very important, and it reduces the polymerization reaction in two ways. The first is physically, dissolving the free radical fragments produced by the reaction in a solvent. Therefore, the solvent needs to have good solubility for heavy aromatics; secondly, the second way for the solvent to prevent the polymerization reaction is to donate hydrogen to the free radical, making it a stable molecule. During the normal operation of the direct coal liquefaction process, the solvent comes from a certain fraction of the process itself, so that it can be recycled in the direct coal liquefaction process, so it is also called circulating solvent. [0003] When the direct coal liquefaction unit starts...

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Application Information

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IPC IPC(8): C10G1/06
Inventor 舒歌平吴秀章崔民利金嘉璐张继明朱豫飞张传江黄剑薇袁明高聚忠
Owner CHNA ENERGY INVESTMENT CORP LTD
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