Research Institute of Petroleum Industry (ripi)

Ripi

Research Institute of Petroleum Industry

Hossein Manafi Varkiani

Khaled Forsat

Reza Hashemi

Khairolah Jafari Jozani

Mohammad Reza Khattaty

Bahman Amini Horri

Akbar Zamaniyan

Kambiz Zadeh Sadaghiani

Mahmoud Khakpour

Hamid Reza Bakhtyari

Hamid Reza Khakdaman

Hamid Reza Godini

Sasan Sadraei Noori

Laleh Shirazi

Provided is a process for the production of dimethyl ether. The process improves the effectiveness of the production of dimethyl ether. Especially, the process can be combined with processes for the production of methanol.

Method for the production of dimethyl ether

An improved Method for the separation of catalyst particles and the wax product from the output slurry of a Fischer-Tropsch bubble column reactor comprising the contact of a hydrocarbon solvent from a cyclic solvent stream with the slurry, wherein the solvent is a hydrocarbon fraction which is pressurized and heated to its supercritical state and the temperature and the pressure of the solvent at the supercritical state are similar to those of the F-T reactor. After the separating of the catalyst from the hydrocarbon mixture of the solvent and the slurry in a catalyst separation section the hydrocarbon solvent and the wax product are separated, whereby the recovered solvent phase is lead to the cyclic solvent stream; which is used after re-pressurizing and re-heating in a supercritical solvent supply module to recycling the hydrocarbon solvent for the contact step. A system for carrying out the method is also disclosed.

Continuous catalyst / wax separation method

The invention relates to a process for removing sulfur particles from an aqueous catalyst solution used to remove hydrogen sulfide from a gas stream (), comprising the steps of directing a flow of a suspension () comprising reduced catalyst solution and sulfur particles to an oxidizer zone (), where the catalyst solution is regenerated by contacting said suspension with a gas () containing oxygen; and removing sulfur from said suspension at least by gravity sedimentation at a bottom () of said oxidizer zone (). According to the invention a flow deflecting means () is disposed at least at an outlet () for the oxidized catalyst solution leaving said oxidizer zone () such as to prevent any turbulent state caused at least by a stream of oxidized catalyst solution leaving said oxidizer zone ().

Process for removing sulfur particles from an aqueous catalyst solution and for removing hydrogen sulfide and recovering sulfur from a gas stream

Growing community of inventors

Tehran, Iran

Hossein Manafi Varkiani