15968-01-1Relevant articles and documents
Thermal Decomposition of [Cu(H2O)2(C8H4O4)], [CuNi(H2O)4(C8H4O4)2], and [Ni(H2O)2(C8H4O4)2](H2O)2 with the Formation of Metal and Bimetal Nanoparticles
Ishchenko, A. V.,Rudina, N. A.,Yudanova, L. I.
, p. 1663 - 1670 (2021/08/24)
Abstract: A comparison is made of the thermoanalytical characteristics and the composition and structure of solid products of the thermal decomposition of ortho-phthalates [Cu(H2O)2(C8H4O4)], [CuNi(H2O)4(C8H4O4)2], and [Ni(H2O)2(C8H4O4)](H2O)2. It is found that the thermal decomposition of these compounds upon heating to 500°C in a He atmosphere can be conditionally divided into two stages: dehydration and decarboxylation. Polymer conglomerates containing uncoated Cu nanoparticles as large as 75 nm are embedded into the polymer matrix of the composite obtained via the thermal decomposition of [Cu(H2O)2(C8H4O4)]. Three types of nanoparticles with sizes of 40–85, 15–25, and 10–15 nm are embedded in the polymer matrices of composites. The particles are Cux/Ni1?x solid solutions of different compositions, obtained via the thermolysis of [CuNi(H2O)4(C8H4O4)2]. It is found that the onset temperature of [CuNi(H2O)4(C8H4O4)2] decarboxylation at the third part of the second stage with the formation of a three-phase region correlates with the temperature of decomposition of Cux/Ni1?–?x solid solutions in the binary metal system, due apparently to the quantum size effect.
O-benzenedicarboxylic acid diallyl ester production technology
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Paragraph 0002, (2017/07/19)
The invention discloses an o-benzenedicarboxylic acid diallyl ester production technology. O-benzenedicarboxylic acid diallyl ester is an important chemical product. The production technology comprises the following processes: 1, sodium phthalic anhydride synthesis: stirring 99% phthalic anhydride and 99% flake NaOH solid to react to generate sodium phthalic anhydride, wherein a boiling point of the 99% phthalic anhydride is 295 DEG C, the phthallic anhydride and the NaOH are fed according to a proportion of 1mol to 3.5mol, reaction time is 2h, a reaction conversion rate is calculated as 57.3% according to NaOH, and a production period is about 2h; 2, o-benzenedicarboxylic acid diallyl ester synthesis: indirectly heating and warming reaction fluid in a reaction kettle in the last step through steam, adding a catalyst, indirectly heating and warming temperature to 40 to 60 DEG C by steam, keeping the temperature unchanged, dropwise adding a certain amount of 99% chloropropene and performing condensation polymerization for 4 to 5h in normal pressure, wherein a boiling point of the 99% chloropropene is 45 DEG C, and a production period is about 5h; 3, washing: pumping a material generated by reaction in the last step into a washing kettle, adding technological purified water into the washing kettle, washing off impurities in a crude product, and then pumping the washed material into a decompressing rectifying kettle; 4, decompressing rectification: indirectly heating through steam, keeping distillate temperature as 120 to 130 DEG C, controlling tower temperature as 68 to 80 DEG C and receiving a rectified component into a stainless steel finished product tank when the rectified component is the o-benzenedicarboxylic acid diallyl ester stably.
Process for manufacture of amidophosphates
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, (2008/06/13)
Reaction products containing at least two amidophosphate radicals are disclosed. They have been produced from (1) an amidophosphate of the formula STR1 wherein R1 is lower alkyl or both R1 's together are lower alkylene, (2) formaldehyde, (3) optionally an aliphatic diol with 2 to 6 carbon atoms, (4) optionally a lower alkanol. If a diol according to (3) has been used, R1 in the amidophosphate according to (1) can also be lower alkenyl or halogenoalkyl. The disclosed reaction products are suitable for flameproofing organic fibre materials, especially cellulosic textiles.
