摘要:
A process for regenerating Raney catalysts by treating the catalyst with liquid ammonia with a water content of less than 5% by weight and with hydrogen having a partial pressure of 0.1 to 40 MPa in the temperature range from 50 to 350° C. for at least 0.1 hour.
摘要:
A process for preparing EDDN and/or EDMN by a) conversion of FA, HCN and EDA, the conversion being effected in the presence of water, b) depleting water from the reaction mixture obtained in stage a), and c) treating the mixture from stage b) with an absorbent in the presence of an organic solvent, wherein the adsorbent is a solid acidic adsorbent.
摘要:
The invention relates to a process for preparing β-aminopropionic acid derivatives by reacting a primary or secondary amine with an acrylic acid derivative, wherein comprises (i) a first primary or secondary amine is provided as an amine of value and reacted with the acrylic acid derivative, to obtain a reaction mixture comprising a first β-aminopropionic acid derivative as a product of value and additionally unconverted acrylic acid derivative, (ii) the unconverted acrylic acid derivative present in the reaction mixture is reacted with a second secondary amine as a scavenger amine virtually fully to give a second β-aminopropionic acid derivative to obtain a reaction mixture comprising the first β-aminopropionic acid derivative as a product of value, the second β-aminopropionic acid derivative and unconverted secondary amine.
摘要:
The invention relates to a process for preparing β-aminopropionic acid derivatives by reacting a primary or secondary amine with an acrylic acid derivative, wherein comprises (i) a first primary or secondary amine is provided as an amine of value and reacted with the acrylic acid derivative, to obtain a reaction mixture comprising a first β-aminopropionic acid derivative as a product of value and additionally unconverted acrylic acid derivative, (ii) the unconverted acrylic acid derivative present in the reaction mixture is reacted with a second secondary amine as a scavenger amine virtually fully to give a second β-aminopropionic acid derivative to obtain a reaction mixture comprising the first β-aminopropionic acid derivative as a product of value, the second β-aminopropionic acid derivative and unconverted secondary amine.
摘要:
The present invention relates to a process for hydrogenating nitriles by means of hydrogen in the presence of a catalyst in a reactor, where the catalyst is arranged in a fixed bed, wherein the cross-sectional loading in the reactor is in the range from 5 kg/(m2 s) to 50 kg/(m2 s). The present invention further relates to a process for preparing downstream products of isophoronediamine (IPDA) or N,N-dimethylaminopropylamine (DMAPA) from amines prepared according to the invention.
摘要翻译:本发明涉及在反应器中催化剂存在下通过氢气氢化腈的方法,其中催化剂布置在固定床中,其中反应器中的横截面负载在5kg /(m2·s)至50 kg /(m2·s)。 本发明还涉及由根据本发明制备的胺制备异佛尔酮二胺(IPDA)或N,N-二甲基氨基丙胺(DMAPA)的下游产物的方法。
摘要:
Process for preparing a cyclic tertiary methylamine of the formula I where A is a C4-alkylene group, a C5-alkylene group or a —(CH2)2—B—(CH2)2— group, where B is oxygen (O) or an N—R1 radical and R1 is C1-C5-alkyl, aryl or C5-C7-cycloalkyl, wherein an amino alcohol II from the group consisting of 1,4-aminobutanol, 1,5-aminopentanol, aminodiglycol (ADG) or aminoethylethanolamine of the formula IIa where R1 is as defined above or is hydrogen (H), in which case R1═CH3 in the amine I, is reacted with methanol in a reactor at a temperature in the range from 150 to 270° C. in the liquid phase in the presence of a copper-comprising heterogeneous catalyst.
摘要:
The present invention relates to a process for preparing N,N-substituted 3-aminopropan-1-ols by a) reacting secondary amine with acrolein at a temperature of (−50) to 100° C. and a pressure of 0.01 to 300 bar, and b) reacting the reaction mixture obtained in stage a) with hydrogen and ammonia in the presence of a hydrogenation catalyst at a pressure of 1 to 400 bar, wherein the molar ratio of secondary amine to acrolein in stage a) is 1:1 or more and the temperature in stage b) is in the range from (−50) to 70° C. In a preferred embodiment, acrolein which has been obtained from glycerol based on renewable raw materials is used. The invention further relates to the use of an N,N-dimethyl-3-aminopropan-1-ol (DMAPOL) based on renewable raw materials as a catalyst for polyurethane preparation, as a scrubbing fluid in gas scrubbing, in the electronics chemicals and electroplating sectors, as a feedstock in organic synthesis, and as an intermediate in the production of pharmaceuticals and crop protection compositions.
摘要:
The present invention relates to a process for preparing N,N-substituted 1,3-propanediamine by a) reacting secondary amine with acrolein at a temperature of from (−50) to 100° C. and a pressure of from 0.01 to 300 bar, and b) reacting the reaction mixture obtained in stage a) with hydrogen and ammonia in the presence of a hydrogenation catalyst at a temperature of from 40 to 400° C. and a pressure of from 1 to 400 bar, wherein the molar ratio of secondary amine to acrolein in stage a) is 2:1 or more and the hydrogenation catalyst used in stage b) comprises cobalt. In a preferred embodiment, acrolein which has been obtained from glycerol based on renewable raw materials is used. The invention further relates to the use of N,N-dimethyl-1,3-propanediamine (DMAPA) based on renewable raw materials as a feedstock for lubricant soaps and other detergents, coagulants, polymers and comb polymers. In a further preferred embodiment, stage b) is performed in the presence of water.
摘要:
The present invention relates to a process for preparing ethanolamines by reacting glycolaldehyde with monoethanolamine and/or diethanolamine in the presence of a catalyst.
摘要:
The present invention relates to a process for hydrogenating nitriles by means of hydrogen in the presence of a catalyst in a reactor, where the catalyst is arranged in a fixed bed, wherein the cross-sectional loading in the reactor is in the range from 5 kg/(m2s) to 50 kg/(m2s). The present invention further relates to a process for preparing downstream products of isophoronediamine (IPDA) or N,N-dimethylaminopropylamine (DMAPA) from amines prepared according to the invention.