Method for removing mercury from liquid hydrocarbon

a liquid hydrocarbon and mercury technology, applied in the field of liquid hydrocarbon mercury removal, can solve the problems of complicated adsorbent preparation and complicated operation of the proposed method, and achieve the effect of simple and effective manner

Inactive Publication Date: 2003-04-24
IDEMITSU PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0005] It is an object of the present invention to provide an industrially useful process for removing ionized mercury

Problems solved by technology

Therefore, the proposed method is complicated in its operation and has drawbacks of requiring a complicated a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Into a tank equipped with a circulation conduit, was fed 38,000 m.sup.3 of a liquid hydrocarbon (density: 0.7363 g / cm.sup.3 at 15.degree. C.) containing 15.3 .mu.g / L of ionic mercury. A pump with a capacity of 15 m.sup.3 / h was disposed between the inlet and the outlet of the circulation conduit. Hydrogen sulfide was introduced at a feeding rate of 4.8 kg / h into a suction side of the pump while operating the pump. After introducing hydrogen sulfide over 21.4 h, the liquid hydrocarbon was further circulated for additional 24 h. During the circulation, the temperature and pressure were controlled to 20.degree. C. and ordinary pressure, respectively. Simultaneously with the circulation of the liquid hydrocarbon, the liquid hydrocarbon in the tank was stirred by a stirrer.

[0029] The surface of the liquid hydrocarbon in the tank was 12 m high from the bottom of the tank. Immediately after stopping the stirring and circulation of the liquid hydrocarbon, a portion of the liquid hydro...

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PUM

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Abstract

A process for removing mercury of the present invention is characterized in that an ionic mercury-containing liquid hydrocarbon placed in a container equipped with a circulating means is effectively contacted with a sulfur compound represented by the general formula (I): M1-S-M2 (I) wherein M1 and M2 may be the same or different and are each independently a hydrogen atom, an alkali metal or an ammonium group, by introducing the sulfur compound into a suction side and/or a discharge side of the circulating means while circulating the ionic mercury-containing liquid hydrocarbon into the container through the circulating means. By the process for removing mercury of the present invention, the ionic mercury is effectively removed from the liquid hydrocarbon in simple manner.

Description

[0001] The present invention relates to a process for removing mercury from a liquid hydrocarbon, and more particularly to an industrially useful process for removing an ionic mercury from an ionic mercury-containing liquid hydrocarbon placed in a container in a simple and efficient manner.[0002] As known in the art, natural gas liquid (NGL) recovered by removing liquefied petroleum gas from natural gases obtained from gas field contains mercury in an amount of from several tens to several hundreds ppb although it varies depending upon the production area. When such a liquid hydrocarbon containing mercury is used as a raw material for producing ethylene, etc., the activity of hydrogenation catalysts are reduced or the apparatus is corroded or it mechanical strength is reduced, because the mercury forms amalgams with platinum, palladium, copper or aluminum. For this reason, it has been strongly demanded to develop a technique for removing mercury from the liquid hydrocarbon.[0003] Ja...

Claims

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Application Information

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IPC IPC(8): C10G29/10C10G29/28
CPCC10G29/10
Inventor SAKAI, TSUNENORIITO, HAJIME
Owner IDEMITSU PETROCHEMICAL CO LTD
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