In 2006, it was recognized as a national high-tech enterprise. In 2008, it was restructured into a wholly state-owned one-person limited liability company. In 2011, it obtained Class-A Engineering Design Integrated Qualification issued by the Ministry of Housing and Urban-Rural Development, which is the highest level of qualification in the current engineering construction field. The company also has qualifications such as Engineering Consulting, Project Supervision, Project Bidding, Class-A Engineering Survey, Environmental Assessment, Pressure Vessels, Pressure Pipelines, Labor Safety Evaluation, and Labor Cooperative Operation License for Foreign Contracted Projects. It has an integrated management system certification for three standards of quality, environment and occupational health and safety. As a wholly-owned subsidiary of CNCEC, its registered capital is RMB 500 million Yuan.
The company has more than 1,200 employees. Among them, there are 1 national engineering design master, 4 engineering survey and design masters in petroleum and chemical industry; more than 440 employees have senior professional titles; more than 260 employees hold the qualification of first-class structure engineer, first-class architect, national supervision engineer, first-class project manager of construction enterprise, national project general contracting project manager, cost engineer, safety engineer, registered consulting engineer, and safety evaluation engineer. It has a group of experts with rich experience in engineering design who enjoy popularity in China. It has strong technical strength and scientific research and innovation capabilities.
The company's MTG, phenol acetone, TDI, coke oven gas to methanol and other technologies are in the leading position in the world; its coal-based natural gas, coking engineering, tar deep processing, nitric acid, ammonium nitrate, polysilicon, ethylene oxide, aniline, polyoxymethylene and other technologies also have a big market share, making the company the leader of the industry. It has undertaken more than 1,300 large and medium-sized key construction projects at home and abroad. It has good performance in projects in the whole country, and has won more than 200 awards for outstanding design and scientific and technological progress at the national, ministerial and provincial levels. Since 2005, it has been one of the top 100 enterprises in Chinese engineering survey and design area.
Technological innovation
SEDIN’s 295 technologies have been granted patents by the State Intellectual Property Office, among which 169 belong to patents for invention and 126 belong to utility model.
SEDIN’s 20 proprietary technologies have been affirmed by China Petroleum and Chemical Exploration and Design Association.
Key authorized invention patents
- A coal breeze pressured gasifier
- A method to produce ammonium nitrate
- A one-step process to produce hydrocarbon products based on methanol
- A methanol-conversion based aromatic hydrocarbon production process and the required catalyst, and the preparation of such catalyst
- Method to recover phosgene during the process of continuous TDI production
- A mixer and method to prepare organic isocyanate
- A moving-bed reactor which allow its catalysts to react and regenerate continuously, and its application method.
- Method to treat phenolic wastewater from coal breeze pressuring gasification
- A method to treat ammonia-containing wastewater from coal breeze pressuring gasification
- A degassing process during the process of neoprene synthesis
- Multielement mixed gasification agent used in dry bottom fixed bed gasifier to prepare syngas
- A coal-to-SNG process through coal breeze slagging gasification
- A 2-step purification process to remove sulfur and CO2 off the coal gas
- A SNG synthesis process based on syngas from coal through methanation
- The method of dinitrotoluene to continuous producing tolylenediamine, its catalyst and catalyst preparation
- A method of low-ranking coal to SNG
- A process of coke oven gas for ammonia preparation
- A process for coking coal humidifying
- The load-type U-NI-A catalyst and its preparation method
- The preparation and application suitable for sulfuric acid resistance catalyst of synthesis slurry bed methanation
- A method of coal tar and heavy oil treatment
- A purification process for waste water ammonia recovery from coal gasification
- A treatment method of phosgene leakage
- A preparation method of coke oven gas sulfuric acid resistance methanation to SNG
- A discharged ammonia gas recovery process
- A preparation method of methanol to aromatic hydrocarbon mixture of benzene, toluene and xylene through low carbon olefin.
- The preparation and application of microporous zeolite coated mesoporous zeolite catalyst in the reaction of methanol to propylene
- One preparation and application suitable for slurry bed methanation catalyst
- One method suitable for controlling H2S tail gas concentration in low temperature methanol wash process
- One ignition method for nitric acid production by ammonia oxidation
- An energy-saving coal breeze pressurized gasifier with day ash discharging
- The process and unit of coal to clean fuel gas
- A process of coke oven gas to synthesis gasoline
- A polycrystalline silicon decomposition furnace
- A magnesium silicide production facility and the production method
- A method to prepare silicon tetrafluoride from quartz sand
- An energy utilization method in the course of cryogenic liquid ammonia recovery
- A synthetic reactor suitable for preparing carbon dioxide propylene oxide copolymer
- A unit and process for cyclohexene preparation by selection hydrogenation of benzene
- Rotating drum reactor
- The system and method for purifying melamine
- The equipment and method for recovering propylene oxide from propylene oxide carbon dioxide copolymer washing solution
- The system and method for benzene production with poly-generation of cyclohexanone and phenol
- The production system and method of caprolactam dehydration
- The preparation method of multi-component catalyst of propylene oxide –carbon dioxide copolymerization
- The oxidation absorption system and method of propylene to acrylic acid
Source: SEDIN Engineering Co., Ltd.
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