Disclosed is a modified propene dehydrogenation (PDH) system and method for producing one or more chemical products from propane as the sole feed stock. The modified PDH system includes a reactor for converting propane into a stream of propene, hydrogen, and waste gas. It further includes a de-ethanizer stripper downstream of the PDH reactor for separating the reactor output gas into a stream of propene as one of an end product or an intermediate product, and a stream of hydrogen and waste gas. The modified PDH system also includes a hydrogen recovery unit disposed downstream of the de-ethanizer stripper system for separating the stream of waste gas and hydrogen into separate streams of waste gas, and hydrogen, with the hydrogen stream being one of an end product or an intermediate product. The modified PDH system can produce propene, hydrogen, ammonia, acrylonitrile, urea, or methanol.

Disclosed is a modified propene dehydrogenation (PDH) system and method for producing one or more chemical products from propane as the sole feed stock. The modified PDH system includes a reactor for converting propane into a stream of propene, hydrogen, and waste gas. It further includes a de-ethanizer stripper downstream of the PDH reactor for separating the reactor output gas into a stream of propene as one of an end product or an intermediate product, and a stream of hydrogen and waste gas. The modified PDH system also includes a hydrogen recovery unit disposed downstream of the de-ethanizer stripper system for separating the stream of waste gas and hydrogen into separate streams of waste gas, and hydrogen, with the hydrogen stream being one of an end product or an intermediate product. The modified PDH system can produce propene, hydrogen, ammonia, acrylonitrile, urea, or methanol.

A catalytic composition and process useful for the conversion of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile, hydrogen cyanide and acetonitrile and mixtures thereof, wherein the catalyst exhibiting increased selectivity to hydrogen cyanide compared to prior art catalysts.

A catalytic composition and process useful for the conversion of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile, hydrogen cyanide and acetonitrile and mixtures thereof, wherein the catalyst exhibiting increased selectivity to hydrogen cyanide compared to prior art catalysts.

The present invention relates to a polyurea coating composition comprising (A) a polyisocyanate: (B) a polyaspartic ester; and (C) a 2-substituted butanedioic acid ester prepared by reacting the fumaric ester in the polyaspartic acid ester solution with a cyanoacetate, a malononitrile or a 1,3-diketone in the presence of a base.

The present invention relates to a polyurea coating composition comprising (A) a polyisocyanate: (B) a polyaspartic ester; and (C) a 2-substituted butanedioic acid ester prepared by reacting the fumaric ester in the polyaspartic acid ester solution with a cyanoacetate, a malononitrile or a 1,3-diketone in the presence of a base.

A method for preparing N,N-bis(2-cyanoethyl-1,2-ethylenediamine involves using glycol ether as a catalyst for synthesis reaction in which ethylenediamine and acrylonitrile at a molar ratio of 1:1.9-2.1 are reactant that react at 20-70C to prepare N,N-bis(2-cyanoethyl)-1,2-ethylenediamine; the method improves the yield to 98.15-98.98%; and the used glycol ether may be filtered and recycled, thereby saving costs and reducing environmental pollution.

A method for preparing N,N-bis(2-cyanoethyl-1,2-ethylenediamine involves using glycol ether as a catalyst for synthesis reaction in which ethylenediamine and acrylonitrile at a molar ratio of 1:1.9-2.1 are reactant that react at 20-70C to prepare N,N-bis(2-cyanoethyl)-1,2-ethylenediamine; the method improves the yield to 98.15-98.98%; and the used glycol ether may be filtered and recycled, thereby saving costs and reducing environmental pollution.

A method for preparing N,N-bis(2-cyanoethyl)-1,2-ethylenediamine involves using strongly acidic cation exchange resin as a catalyst for synthesis, and is advantageous for not only eliminating the need of distillation for purification and thereby reducing reaction time, but also improving the yield of N,N-bis(2-cyanoethyl)-1,2-ethylenediamine to 97.70-98.08%; and the method benefits simplified process and reduced costs and helps to save water significantly, thereby minimizing environmental pollution.

A method for preparing N,N-bis(2-cyanoethyl)-1,2-ethylenediamine involves using strongly acidic cation exchange resin as a catalyst for synthesis, and is advantageous for not only eliminating the need of distillation for purification and thereby reducing reaction time, but also improving the yield of N,N-bis(2-cyanoethyl)-1,2-ethylenediamine to 97.70-98.08%; and the method benefits simplified process and reduced costs and helps to save water significantly, thereby minimizing environmental pollution.