- Production method of DMDEE
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The invention discloses a production method of DMDEE. The production method comprises the following steps: dropwise adding TEOA to sulfuric acid to form a synthesis reaction system, heating to the temperature of 160 to 250 DEG C after dropwise adding and carrying out heat preservation for 3 to 24 h, and discharging water in the synthesis reaction process out of the synthesis reaction system to realize dehydration; adding water, a solvent and an alkali substance to carry out a neutralization reaction after cooling an obtained reaction solution and ending the neutralization reaction until the pHvalue is 8 to 14; filtering a product obtained by the neutralization reaction, and carrying out distillation separation on filtrate obtained by filtering to obtain DMDEE. DMDEE prepared by the methodhas the technical advantages of simple process, low cost and less pollution.
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Paragraph 0060-0110
(2019/08/01)
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- METHOD FOR THE CONTINUOUS PRODUCTION OF AN AMINE
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The invention relates to a method for the continuous production of an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound, selected from the group containing ammonia and primary and secondary amines, at a temperature that ranges between 60 and 300 °C in the presence of a catalyst containing copper. According to the invention, the catalytically active mass of the catalyst contains the following prior to its reduction with hydrogen: 20 to 85 wt. % aluminium oxide (Al2O3), zirconium dioxide (ZrO2), titanium dioxide (TiO2) and/or silicon dioxide (SiO2); 1 to 70 wt. % copper compounds containing oxygen, calculated as CuO; 0 to 50 wt. % magnesium compounds containing oxygen, calculated as MgO; chromium compounds containing oxygen, calculated as Cr2O3; zinc compounds containing oxygen, calculated as ZnO; barium compounds containing oxygen, calculated as BaO; and/or calcium compounds containing oxygen, calculated as CaO; and less than 30 wt. % nickel compounds containing oxygen, calculated as NiO, in relation to the copper compounds containing oxygen, calculated as CuO. The reaction in the gas phase takes place isothermally in a tubular reactor.
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Page/Page column 25
(2008/06/13)
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- Amine bisulfites
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This invention relates to the amine bisulfites which are useful as a combination corrosion inhibitor/oxygen scavenger. This is illustrated by heterocyclic amine bisulfites such as pyridine bisulfites.
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