Abstract:
본 발명은 2,3-부탄디올(2,3-Butanediol)로부터 1,3-부타디엔(1,3-Butadiene)과 메틸에틸케톤(Methyl Ethyl Ketone)을 제조하는 방법에 관한 것으로, 본 발명에 따른 2,3-부탄디올로부터 1,3-부타디엔과 메틸에틸케톤을 제조하는 방법은 칼슘-바나듐산-인산아파타이트[Ca 4.5+a (VO 4 )x(PO 4 ) 3-x (OH) 2a ] 또는 칼슘-나이오븀산-인산아파타이트[Ca 4.5+a (NbO 4 )x(PO 4 ) 3-x (OH) 2a ];이되, 상기 X는 몰비로 0.01-0.30이고, a는 몰비로 0.05-1.00인 것을 특징으로 하는 촉매를 사용함에 따라서, 2,3-부탄디올의 전환율 및 1,3-부타디엔과 메틸에틸케톤의 선택도가 현저히 향상되고, 상기 촉매의 반응 안정성이 우수하여 장기간 동안 높은 활성이 유지되는 효과가 있다.
Abstract:
The present invention relates to a method for preparing 1,3-butadiene and methyl ethyl ketone form 2,3-butanediol. A method for preparing 1,3-butadiene and methyl ethyl ketone form 2,3-butanediol according to the present invention uses a catalyst which is Ca_5(VO_4)_x(PO4)_(3-x)(OH); or Ca_5(NbO_4)_x(PO_4)_(3-x)(OH), wherein the mole ratio of the x is 0.01-0.3, thereby improving a conversion ratio of 2,3-butanediol and selectivity of 1,3-butadiene and methyl ethyl ketone, and maintaining high activity for the long term because of excellent response stability of the catalyst.
Abstract:
PURPOSE: To provide a method for preparing stoichiometric barium strontium titanate thin films of high quality by direct liquid injection metal organic chemical vapor deposition under the milder conditions using organic complexes of Ba, Sr and Ti that are capable of being vaporized together as raw materials for mixing since they have similar thermal stability, decomposition characteristics and solubility. CONSTITUTION: In a method for preparing barium strontium titanate(BaxSr1-xTiO3) thin films by direct liquid injection metal organic chemical vapor deposition, the method is characterized in that a mixture of Ba(th)2(tmeea), Sr(thd)2(tmeea) and Ti(thd)2(O¬i Pr)2 $ûthd=2,2,6,6-tetramethylheptanedionate, tmeea=tris£2-(2-methoxyethoxy)ethyl|amine, O¬i Pr=isoproxy$ý is used as raw materials of barium, strontium and titanium, wherein the method comprises the steps of: dissolving the raw materials of barium, strontium and titanium into an organic solvent; transferring the solution to an instantaneous vaporizer heated to a temperature of 200 to 250 deg.C so that the solution is vaporized; and injecting the vaporized solution into a deposition container having pressure of 0.5 to 2.0 torr so that the vaporized solution is deposited on a matrix heated to a temperature of 300 to 500 deg.C, wherein the method further comprises a step of heat treating the deposited matrix in a temperature range of 600 to 800 deg.C, and wherein the raw materials of barium, strontium and titanium are mixed in a ratio of 1 ¢¦ 2:1:5 ¢¦ 10.
Abstract:
PURPOSE: Provided is an organic alkali earth metal complex with thermal stability and good vaporization for formation of metal oxide composite films. The resultant complex is adapted to the production of semiconductors, photoelectrics and piezoelectrics. CONSTITUTION: The complex of organic alkali earth metals, L-M-L', is prepared by adding alcohol to organic solution containing alkali earth metal, expressed by the formula MX + xs HOR -->£M(OR)2|n, followed by mixing with chelate ligands L and L', expressed by the formula £M(OR)2|n + L + L' -->L-M-L', where M is Ba, Sr or Ca, L is R(CH3)CH(OH) (CH2)nCH(OH)(CH3)R'(R and R' are C1-C10 alkyl group, and n is an integer of 1-5), L' is N(CH2CH2XCH2CH2YZ)3(X and Y are O or NH, and Z is C1-C10 alkyl group).
Abstract:
본 발명은 하기 화학식 1과 화학식 2로 표시한 신규의 구리 아미노알콕사이드 화합물에 관한 것으로, 본 발명에 따른 구리 선구 물질은 상온에서 고체 또는 액체 상태로 존재하며 증기압이 매우 높아 반도체 소자의 배선용 구리 도선의 화학 증착에 유용하게 사용할 수 있다.
상기 식에서, m은 1 내지 3의 정수이고, n은 2 내지 4의 정수이며, R 및 R'은 플루오르를 포함하 거나 포함하지 않는 C 1-4 의 알킬기이다.
Abstract:
본 발명은 직접 액체 주입 금속 유기물 화학 증착법에 의해 티탄산바륨스트론튬 박막을 제조하는 방법에 관한 것으로서, 바륨, 스트론튬 및 티타늄의 원료로서 Ba(thd) 2 (tmeea), Sr(thd) 2 (tmeea) 및 Ti(thd) 2 (O i Pr) 2 {thd = 2,2,6,6-테트라메틸헵탄디오네이트, tmeea = 트리스[2-(2-메톡시에톡시)에틸]아민, O i Pr = 이소프로폭시} 각각을 혼합하여 사용하는 것을 특징으로 하는 본 발명의 방법에 의하면, 고품위의 화학량론적 티탄산바륨스트론튬 박막을 보다 온화한 조건에서 제조할 수 있다.