The present invention discloses an iron-based nitrogen doped graphene catalyst, process for preparation thereof and use of said catalyst in oxidant-free catalytic dehydrogenation of alcohols and amines to the corresponding carbonyl compounds, amines and N-heterocylic compounds with extraction of molecular hydrogen as the only by-product.

The present invention discloses an iron-based nitrogen doped graphene catalyst, process for preparation thereof and use of said catalyst in oxidant-free catalytic dehydrogenation of alcohols and amines to the corresponding carbonyl compounds, amines and N-heterocylic compounds with extraction of molecular hydrogen as the only by-product.

Embodiments of the present invention provide an electroplating gold plating solution and use thereof. The electroplating gold plating solution comprises a gold cyanide salt, a conductive salt, an oxalate, a lead-containing compound, and additives comprising a phenolic compound and/or gelatin. The general formula of the phenolic compound is as shown in the following formula (1):

##STR00001##

Wherein at least one of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 is selected from hydroxyl, and the rest are each independently any one selected from the group consisting of hydrogen atom, halogen group, carboxyl, aldehyde, sulfonic acid group, amino, or alkyl. The technical solution of the present invention can produce the gold bump having a high hardness after heat treatment by adding a phenolic compound and/or gelatin in the electroplating gold plating solution, which is conducive to preventing the gold bump from deformation during the thermocompression bonding process.

Embodiments of the present invention provide an electroplating gold plating solution and use thereof. The electroplating gold plating solution comprises a gold cyanide salt, a conductive salt, an oxalate, a lead-containing compound, and additives comprising a phenolic compound and/or gelatin. The general formula of the phenolic compound is as shown in the following formula (1):

##STR00001##

Wherein at least one of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 is selected from hydroxyl, and the rest are each independently any one selected from the group consisting of hydrogen atom, halogen group, carboxyl, aldehyde, sulfonic acid group, amino, or alkyl. The technical solution of the present invention can produce the gold bump having a high hardness after heat treatment by adding a phenolic compound and/or gelatin in the electroplating gold plating solution, which is conducive to preventing the gold bump from deformation during the thermocompression bonding process.

The invention relates to an improved method for the preparation of alkylsalicylaldehyde or its corresponding metallic salts. The invention also relates to a method for the preparation of alkylsalicylaldoxime by reacting said alkylsalicylaldehyde or its corresponding metallic salts with hydroxylamine or its salt. The invention also relates to a method for extracting a metal in an aqueous solution containing dissolved metal.

The invention relates to an improved method for the preparation of alkylsalicylaldehyde or its corresponding metallic salts. The invention also relates to a method for the preparation of alkylsalicylaldoxime by reacting said alkylsalicylaldehyde or its corresponding metallic salts with hydroxylamine or its salt. The invention also relates to a method for extracting a metal in an aqueous solution containing dissolved metal.

The invention relates to an improved method for the preparation of alkylsalicylaldehyde or its corresponding metallic salts. The invention also relates to a method for the preparation of alkylsalicylaldoxime by reacting said alkylsalicylaldehyde or its corresponding metallic salts with hydroxylamine or its salt. The invention also relates to a method for extracting a metal in an aqueous solution containing dissolved metal.

Disclosed herein are processes for synthesizing 2-hydroxy-6-((2-(1-isopropyl-1H-pyrazol-5-yl)-pyridin-3-yl)methoxy)benzaldehyde (also referred to herein as Compound (I)) and intermediates used in such processes. Compound (I) binds to hemoglobin and increases it oxygen affinity and hence can be useful for the treatment of diseases such as sickle cell disease.

Disclosed herein are processes for synthesizing 2-hydroxy-6-((2-(1-isopropyl-1H-pyrazol-5-yl)-pyridin-3-yl)methoxy)benzaldehyde (also referred to herein as Compound (I)) and intermediates used in such processes. Compound (I) binds to hemoglobin and increases it oxygen affinity and hence can be useful for the treatment of diseases such as sickle cell disease.

The present disclosure provides regioselective methods for synthesizing intermediates useful in making prostacyclin derivatives, such as treprostinil.