Abstract:
본 발명은 중간생성물의 선택도 모니터링을 통한 메탄올로부터 경질올레핀을 제조하는 순환유동층 공정의 효율적 운전에 관한 것으로, 구체적으로 디메틸에테르(DME) 선택도를 모니터링하여 사용된 촉매의 비활성화 정도를 예측하고 촉매 재생을 위한 공기 유량을 조절하여 최적화된 코크 정도를 유지시킴으로써 경질올레핀계 탄화수소의 생산성을 효과적으로 증진할 수 있고, 특히 에틸렌 및 프로필렌에 대한 우수한 선택성을 유지할 수 있는 방법에 관한 것이다.
Abstract:
The present invention relates to a manufacturing method for a layered mesoporous SAPO-34 molecular sieve and to a manufacturing method for light olefin using the layered mesoporous SAPO-34 molecular sieve manufactured thereby and, more specifically, to a manufacturing method for a layered mesoporous SAPO-34 molecular sieve comprising: (Step 1) a step of adding 1.0-2.0 moles of silica composites (based on SiO_2) based on 1 mole of alumina precursors (based on Al_2O_3) as a step of mixing silica composites including organic templates and silica precursors, alumina precursors and water; (Step 2) a step of manufacturing synthesis gel by adding phosphoric acid and synthetic templates in a mixed solution manufactured in step 1 and stirring the same; (Step 3) a step of manufacturing SAPO-34 sieve by performing hydrothermal synthesis on the synthesis gel manufactured in step 2; and (Step 4) a step of sintering the SAPO-34 sieve manufactured in step 3. The manufacturing method for SAPO-34 according to the present invention has excellent life expectancy in MTO reaction compared with that of a catalyst using existing SAPO-34 since SAPO-34 sieve with small crystals of uniform distribution by controlling the amount of silica composites and reducing the amount of water during reaction and improves productivity when light olefin is manufactured by using the same as a catalyst.
Abstract:
The present invention relates to a catalyst for preparing 1,3-butadiene in which a transition metal compound is supported on regular mesoporous silica, and a method for preparing 1,3-butadiene using the same. Specifically, the catalyst of the present invention can improve selectivity by optimizing the type and characteristics of the silica and specifying the type and content of a transition metal oxide; can increase the yield of 1,3-butadiene by highly dispersed active sites due to a high surface area; and facilitates a diffusion of a reactant and a product and the transfer of materials by having a regular mesoporous structure. In addition, since all of the active sites are not concentrated so as to be able to equally and uniformly participate in a reaction, the deterioration of activity is inhibited compared with a conventional silica catalyst in which micropores and mesopores coexist, thereby remarkably improving the lifetime of the catalyst compared with a conventional silica-based catalyst, and thus process operation efficiency can be improved due to a longer recycling period. Therefore, the catalyst of the present invention can be useful for preparing the 1,3-butadiene. [Reference numerals] (AA) Example 1; (BB) Example 2; (CC) Example 3; (DD) Example 4; (EE) Example 5; (FF) Example 6; (GG) Example 7; (HH) Example 8; (II) Example 9; (JJ) Example 10; (KK) Comparative example 1; (LL) Comparative example 2; (MM) Comparative example 3