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Patent Searching and Data


Matches 401 - 450 out of 583

Document Document Title
JPH0333718B2  
JPH0326340A
PURPOSE: To prepare a hydrogenation catalyst for maleic anhydride to tetrahydrofuran and γ-butyrolactone by depositing catalyticaily active oxide material expressed by a specified formula on a porous and inert support. CONSTITUTION: A s...  
JPH02273668A
PURPOSE: To simply obtain the subject compd. from an easily obtainable raw material by an α-acyl lactone, an aldehyde and an alkali metal hydroxide in an essentially equimolar ratio in an inert diluent at specific temp. while removing w...  
JPH02273667A
PURPOSE: To advantagenously obtain the subject compd. by reacting α-acyl lactone, aldehyde and alkali metal hydroxide in an essentially equimolar ratio in an inert diluent at specific temp. while removing water and hydrogenating the rea...  
JPH02221267A
PURPOSE: To suppress the formation of a polymer at the time of dimerization by using a specific amt. of sulfur dioxide as an inhibitor to add the same to a reaction medium of keten obtained by the catalytic decomposition of acetic acid o...  
JPH02174685A
PURPOSE: To effectively produce an optically active γ-lactone by bringing a vegetable oil, a hydrolysis product thereof or ricinolic acid into contact with a growing medium of specific microorganisms such as Aspergillus-niger. CONSTITUT...  
JPH0219831B2  
JPH0219832B2  
JPH0219830B2  
JPH0219113B2  
JPH0285273A
NEW MATERIAL: A compound of formula I (wherein A is a hydrocarbon chain having a 1-10-membered ring, etc.; Z is a residue of a primary, secondary or tertiary alcohol having at least one asymmetric carbon atom, etc.). EXAMPLE: (1R,5S)-6,6...  
JPH0276862A
NEW MATERIAL: A compd. represented by formula I [wherein R1 is H, an acyl or -CHO; R2 to R4 are H, a lower alkyl or lower alkoxy; R5 and R6 are each H or a lower alkyl; X and Y are >CR14R15 (R14 and R15 are each H or a lower alkyl), -O- ...  
JPH0276591A
PURPOSE: To obtain a chiral hydroxycarboxylic acid having an extremely deviated enantiomerism by oxidizing a prochiral diol in the presence of a catalyst derived from Corynebacterium oxydans. CONSTITUTION: A prochiral diol is dissolved i...  
JPH0259567A
PURPOSE: To extend the life of a catalyst to efficiently produce caprolactone by simple and continuous treatment by passing a vaporous 6-hydroxycapronic ester above a catalyst arranged on a fixed bed along with an inert gas under heating...  
JPH0211582A
PURPOSE: To obtain a lactone useful as a solvent and an intermediate with high selectivity without forming a byproduct by reacting a specific (substituted) alkenol and carbon monoxide-containing gas by using a specific catalyst. CONSTITU...  
JPH029873A
PURPOSE: To obtain gamma-butyrolactone selectively at high temperature under high pressure in one step by using a catalyst comprising nickel and palladium deposited on a silica-based support having a high specific surface area in the cat...  
JPH021840B2  
JPH021833B2  
JPH02281A
PURPOSE: To concentrate lactones useful for flavoring margarine or the like in a large scale by distillative deacidificating a fat compsn. containing a large amt. of a lauric acid residue from a natural product such as coconut oil and fu...  
JPH02786A
PURPOSE: To improve yield of the subject furan being useful as an intermediate of chemicals by bringing maleic anhydride in hydrogen-contg. gas into contact with a specified hydrogenating catalyst. CONSTITUTION: A vapor mixture of at lea...  
JPH0148907B2  
JPH0142246B2  
JPH0135814B2  
JP01153653A
PURPOSE: To produce a straight-chain carboxylic acid by dissolving an olefinically unsaturated straight-chain compound selected from terminal- unsaturated alkenes and esters, into a solvent and mixing the resulting solvent solution with ...  
JPH1153653A
To output information on the possibility that detecting operation cannot be processed within the dynamic range of a photodetecting circuit in advance by providing a decision means which judges that there is a saturated area when the quan...  
JPS6490135A
PURPOSE: To obtain the subject substance by bringing a prochiral olefinic compd. and water or alcoholic compd. and CO into reaction in the presence of a protonic acid exclusive of nitric acid, the independent enantiomer of an optically a...  
JPH01500753A  
JPH0114280B2  
JPS6442478A
PURPOSE: To recover high-purity gamma-butyrolactone by subjecting a mixture contg. gamma-butyrolactone and a small amt. of diethyl succinate to fractional distillation in the presence of diethyl ethoxysuccinate. CONSTITUTION: Maleate is ...  
JPS63310883A  
JPS63264577A
PURPOSE: To obtain lactones with increased catalytic activity and improved stability thereof in good yield and high selectivity under mild condition, by hydrogenating a dicarboxylic acid, anhydride thereof, etc., in a homogeneous liquid ...  
JPS63258866A  
JPS63218636A  
JPS63218669A  
JPS63122678A  
JPS6393773A  
JPS6393772A  
JPS6312851B2  
JPS6356295A  
JPS6310705B2  
JPS63500099A  
JPS62277375A  
JPS6225667B2  
JPS6220538B2  
JPS6284076A  
JPS6230778A  
JPS625123B2  
JPS61218549A  
JPS6141894B2  
JPS61178975A  

Matches 401 - 450 out of 583