SU160189A1 - - Google Patents
Info
- Publication number
- SU160189A1 SU160189A1 SU805667A SU805667A SU160189A1 SU 160189 A1 SU160189 A1 SU 160189A1 SU 805667 A SU805667 A SU 805667A SU 805667 A SU805667 A SU 805667A SU 160189 A1 SU160189 A1 SU 160189A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- urea
- formaldehyde
- solution
- condensation
- fertilizers
- Prior art date
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 18
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 16
- 239000004202 carbamide Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 5
- ODGAOXROABLFNM-UHFFFAOYSA-N Polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 4
- 229920001807 Urea-formaldehyde Polymers 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 235000019749 Dry matter Nutrition 0.000 description 1
- 229920002456 HOTAIR Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011785 micronutrient Substances 0.000 description 1
- 235000013369 micronutrients Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
Description
Известен способ получени мочевино-фор1мальдегидных удобрений из мочевины и формальдегида смешением водных растворов мочевины и формальдегида. Известен также способ получени мочевино-формальдегидных удобрений распылением водных растворов мочевииы и формальдегида в токе гор чего воздуха .A method of producing urea-formaldehyde fertilizers from urea and formaldehyde is known by mixing aqueous solutions of urea and formaldehyde. There is also known a method for producing urea-formaldehyde fertilizers by spraying aqueous solutions of urea and formaldehyde in a stream of hot air.
По предлагаемому способу в водный раствор мочевины ввод т контактные газы, полученные при окислении метанола или метана и содержащие до 20% формальдегида. Такое отличие упрощает технологическую схему производства и удешевл ет себестоимость получаемых удобрений.According to the proposed method, contact gases obtained by oxidation of methanol or methane and containing up to 20% formaldehyde are introduced into the aqueous solution of urea. This difference simplifies the technological scheme of production and reduces the cost of the cost of fertilizers.
Пример. В стекл нный цилиндр емкостью 1 л загружают 370 г 701%-ного раствора мочевины (в растворе 260 г сухой мочевины), 3 жл 5 н. гидроокиси натри . Через этот раствор при 60°С в течение 1 час пропускают контактные газы, содержаилие 90 г формальдегида . Получают 490 г конденсационного раствора со следующей характеристикой: концентраци сухих веществ59%Example. 370 g of a 701% urea solution (260 g of dry urea in a solution), 3 ml of 5 N are loaded into a 1 l glass cylinder with a capacity of 1 l. sodium hydroxide. Contact gas is passed through this solution at 60 ° C for 1 hour, containing 90 g of formaldehyde. 490 g of condensation solution are obtained with the following characteristic: dry matter concentration59%
удельный вес при 20°С1,211specific gravity at 20 ° С1,211
показатель преломлени 1,4450the refractive index of 1.4450
содержание метилольных групп в пересчете на СН-)О10,4the content of methylol groups in terms of CH-) O10,4
рН8,5pH 8.5
После прибавлени к конденсационному раствору 1 н. серной кислоты в количестве 10% (рН 3,6) выдел етс белый зернистый порощок.After adding 1N to the condensation solution. sulfuric acid in the amount of 10% (pH 3.6) produces a white granular powder.
В ловушках найдено 2,5 г СПоО (2,8% к исходному формальдегиду).In traps, 2.5 g of FCO was found (2.8% of the initial formaldehyde).
При регулировании условий конденсации мочевины с формальдегидом (рН и концентрации конденсациоиного раствора, температурный режим, количество вводимой кислоты) могут быть получены мочевино-формальдегидиые материалы с самыми разнообразными свойствами. В конденсационный раствор могут быть добавлены различные добавки, составл ющие микроудобрени .When regulating the conditions of condensation of urea with formaldehyde (pH and concentration of the condensation solution, temperature, amount of injected acid), urea-formaldehyde materials with various properties can be obtained. Various additives that make up micronutrients can be added to the condensation solution.
Предмет изобретени Subject invention
Способ получени мочевино-формальдегидных удобрений па основе водного раствора мочевины при повышенной температуре, отличают и и с тем, что, с целью упрощени технологической схемы процесса, в водный раствор мочевины ввод т содержащие формальдегид контактные газы, полученные окислением метанола или метана.The method for producing urea-formaldehyde fertilizers on an urea-based aqueous solution at elevated temperatures is also distinguished by the fact that, in order to simplify the process flow, formaldehyde-containing contact gases obtained by oxidation of methanol or methane are introduced into the urea aqueous solution.
Publications (1)
Publication Number | Publication Date |
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SU160189A1 true SU160189A1 (en) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2726894C1 (en) * | 2017-11-30 | 2020-07-16 | Мицубиси Хеви Индастриз Энджиниринг, Лтд. | Fertilizer production plant and method of producing fertilizer |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2726894C1 (en) * | 2017-11-30 | 2020-07-16 | Мицубиси Хеви Индастриз Энджиниринг, Лтд. | Fertilizer production plant and method of producing fertilizer |
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