The technology of organic sulfur hydrolysis
The organic sulfur source and the problem of the existing process
In the sulfur recovery process (traditionally in the Claus sulfur recovery process), as the gas composition varied, when the temperature of  combustion furnace reached 1000-1300 ℃, the mixed gas will generate a certain amount of COS and a small amount of CS2,  and also there are some organic sulfur in the feed gas .The organic sulfide content From the combustion furnace is 0.2-10g / m3, the O2 content is more than 0.5g / m3,

For the removal of organic sulfur, although there are a variety of organic sulfur hydrolysis catalysts developed and used in Chinese market and abroad, and some  results have been achieved, due to  excess air in the combustion process,  resulting in the higher oxygen content, the existing hydrolysis catalyst is sensitive to the oxygen, making the hydrolysis effect of organic sulfur  not so good. with the time of using going by, the hydrolysis rate decreased;

In the hydrogenation process due to the temperature and reaction time, space velocity, temperature and other effects, the final exhaust also contains a certain amount of organic sulfur, after burning it is emitted into the atmosphere as SO2, resulting in emissions can not be up to the standard.
CH4＋S2＝2H2＋CS2               CH4＋2S2＝2H2S＋CS2
2H2S＋CO2＝2H2O＋CS2 CO2＋H2S＝2H2O＋COS
CO+S2=2COS               2CO+S2=CS2+CO2
In the process of co-production, coal gasification, coke oven gas, producing alcohol ether fuel and syngas by carbon-based catalyst, the tail gas after the petroleum hydrogenation , etc, except the H2S there are also organic sulfur (COS, CS2). In order to avoid catalyst poisoning, to ensure the product quality, to reduce air pollution and meet the environmental requirements, the gas must be purified.

The development process of our technology
（1） Purpose
The process is developed in order to meet the more strict environmental requirements and overcome the problem of the organic sulfur hydrolysis catalyst in the existing Claus process both domestic and abroad, and to solve the high organic sulfur problem in the raw gas, effluent gas.
R&D Direcction
The existing catalysts are mainly activated alumina, iron-containing alumina, titanium-containing alumina and titanium-based catalyst;
Transition metal oxides with redox properties: iron, cobalt and nickel;
Rare metals with Lewis basicity: lanthanum and lanthanide series metal oxides, titanium, cadmium, molybdenum, zinc, barium, lead, yttrium and so on.
In July 2010, the new catalyst was put into use in the first set of industrial installations.
in August Fareast organic sulfur hydrolysis catalyst passed the performance and Index evaluation..
From 2012 to 2015 total sales amount is 146.5 MTs.
Sinopec Zhenhai Refining & Chemical, Jinling Petrochemical, Sinopec Maoming, Yanchang Petroleum, International Coking, Jiangsu Linggu, Tianchen Chem.

The technical characteristics of organic sulfur hydrolysis from Far East
  With high hydrolysis speed of COS, CS2;
  Wide temperature range (220-370 ℃);
  Wide Oxygen, SO2 content tolerance;
  Not affected by H2S partial pressure;
  It can be used with Claus, hydrogenation reduction, it can also be used alone which is better;
  The catalyst is with long service life and complete hydrolysis.
COS＋H2O＝H2S＋CO2＋35.53KJ／mol
CS2＋2H2O＝2H2S＋CO2＋32.66KJ／mol

(4)The characteristics of the process.
The proper flow mode is set up according to the gas content. the flow is short and the operation is simple. It can be used together with the existing Claus reactor. The reaction temperature range is wide and the organic sulfur hydrolysis rate is more than 99.5%.