2results about How to "High hydrothermal stability" patented technology

The application discloses a silver-based arsenic removal agent for an ethylene device and a preparation method thereof. The arsenic removal agent comprises the following components in the total mass of the arsenic removal agent being 100%: 0.3-0.8 wt% of an active component silver; 5.0-8.0 wt% of a bimetallic promoter (consisting of 3.0-5.0 wt% of indium oxide and 2.0-3.0 wt% of tin oxide); 1.2-2.0 wt% of a modifier (consisting of 0.8-1.2 wt% of cerium oxide and 0.4-0.8 wt% of a polydopamine carbon skeleton); and the balance of modified alumina; the arsenic removal agent has low cost, high activity and high safety; through carrier surface regulation and multi-component synergy, the arsenic removal agent realizes synchronous deep removal of arsenic, mercury and sulfur under ultra-low silver loading (<1%), effectively inhibits the generation of silver acetylide and carbon deposition, the agent does not need to add an additional mercury / sulfur removal bed, significantly reduces investment, and guarantees long-period stable operation of the ethylene device.

This invention discloses a catalyst for the production of ethylene and propylene, its preparation method, and its applications. The catalyst comprises the following components: I) 1%–10% of chemical formula A x B y D z A compound of O4; in the chemical formula, the oxidation states of elements A, B, and D are m, n, and p, respectively, satisfying x·m + y·n + z·p = 8, where m, n, and p are integers not greater than 3; the A x B y D z O4 has a spinel structure; II) 0.5%–10% is selected from at least one oxide of rare earth elements, P, Mo, and W; III) 20.0%–55.0% is selected from at least one zeolite of ZSM-5 and ZSM-11; IV) 10%–30% is a binder; V) 25.0%–60.0% is clay. This catalyst is used in the catalytic cracking of petroleum hydrocarbons to produce ethylene and propylene, and features good catalyst stability, low methane yield, and high ethylene and propylene yields.