Complex iron preparation and preparation method thereof

Abstract

The invention belongs to the field of natural gas desulfurization in the petroleum industry, and specifically discloses a complex iron preparation and a preparation method thereof. The complex iron preparation is prepared from the following raw materials: ferrite, inorganic base, cobalt salt, organic complexing agent, piperazine, polyethylene glycol and water. The preparation method of the complexiron preparation comprises the following steps: (1) mixing the cobalt salt, the inorganic base, the organic complexing agent, the ferrite and the water at normal temperature and stirring for 2-5 hours; (2) introducing air for 2-3.5 hours continuously; (3) adding the piperazine, stirring uniformly, then adding polyethylene glycol and stirring for 1-1.5 hours to obtain the complex iron preparation.The complex iron preparation has the advantages of simple preparation, high regeneration rate and low cost, and has good application prospects in the field of natural gas desulfurization.

Description

technical field [0001] The invention relates to the field of chemical additives for natural gas purification technology, in particular to a complex iron preparation and a preparation method thereof. Background technique [0002] In the development of oil and gas fields, many natural gas containing H 2 Blocks with high S, especially oilfields with high H content 2 S oil well associated gas. h 2 The existence of S has caused great harm to safe production and equipment maintenance, and is one of the environmental pollution sources that must be strictly controlled. In conventional wet desulfurization, complex iron desulfurization is favored in the field of desulfurization in oil and gas fields because of no secondary pollution and high desulfurization efficiency. Desulfurization issues play a crucial role. [0003] Complex iron desulfurization technology is widely used in natural gas purification plants, refineries and sewage treatment plants 2 The tail gas of S is treated...

AI Technical Summary

Problems solved by technology

However, there are also certain shortcomings in the use of complex iron preparations. For example, the iron chelating agent used in the desulfurization solution developed by Clean Air Systems is ethylenediaminetetraacetic acid and N-hydroxyethyldiaminetriacetic acid, which have a strong effect on iron. Good chelating ability, high desulfurization efficiency, but high desulfurization operation cost, low sulfur capacity; Chinese invention patent (publication number: CN105233649A) discloses a complex iron preparation, the components include: soluble iron salt , iron salt chelating agent, sulfide absorbent, stabilizer, composite sulfur particle sedimentation agent, multifunctional corrosion inhibitor, among which Fe in soluble iron salt 3+ with Fe 2+ The molar ratio of chelating agent to iron salt is 1:3-5:1, the molar ratio of chelating agent to iron salt is 1.2:1-3:1, the pH of the solution is 8.0-9.5, the desulfurization process is simple, and the gas-liquid mass transfer efficiency is high, but there are The disadvantages of high desulfurization operation cost, low sulfur capacity, slow regeneration rate, large-scale regeneration equipment, high regeneration air consumption, and high energy consumption during regeneration