SU294465A1 - Method of preparing phormaldehyde - Google Patents
Method of preparing phormaldehydeInfo
- Publication number
- SU294465A1 SU294465A1 SU6901343274A SU1343274A SU294465A1 SU 294465 A1 SU294465 A1 SU 294465A1 SU 6901343274 A SU6901343274 A SU 6901343274A SU 1343274 A SU1343274 A SU 1343274A SU 294465 A1 SU294465 A1 SU 294465A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- catalyst
- phormaldehyde
- preparing
- formaldehyde
- yield
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Известен способ получени формальдеги- да окислением димегилового эфира кислородом воздуха в присутствии катализатора, состо щего из трехокиси вольфрама и фосфорной кислоты на окиси алюмини .A method of producing formaldehyde by oxidizing dimethyl ester with oxygen in the presence of a catalyst consisting of tungsten trioxide and phosphoric acid on alumina is known.
Дл повышени выхода целевого продукта предлагаетс в качестве катализатора использовать фосфат олова. При этом достигаетс выход формальдегида 7О-72% от теоретического .To increase the yield of the target product, it is proposed to use tin phosphate as a catalyst. In this case, a formaldehyde yield of 7O-72% of the theoretical is achieved.
Предлагаемый катализатор получают осаждением фосфата олова из растворимых солей олова действием фосфорнокислых солей щелоч Чых металлов или фосфорной кислоты. При этом возможно добавление углекислых щелочей и осаждение на носител х. Затем катализаторную массу фильтруют, промывают, формуют, сушат и прокаливают- Полученные катализаторы активны в предел(ах 5bD-6ОО С. Оп-о тимальна объемнад. скорость смеси газов в зависимости от температуры равн етс 50О-ЗООО Ч-.The proposed catalyst is obtained by precipitating tin phosphate from soluble tin salts by the action of alkali phosphate salts or phosphoric acid. It is also possible to add carbonic alkali and precipitate on carriers. Then, the catalyst mass is filtered, washed, molded, dried and calcined. The resulting catalysts are active to the limit (ax 5bD-6OO C. Op-max volume of the gas mixture, depending on the temperature, is 50 ° -310 ° C.
Пример 1. Приготовление катализатора .Example 1. Preparation of the catalyst.
воды. Полученный раствор при перемешивании медленно вливают в раствор 53,5 г IfasHPO -lZHjp в 48О мл воды. Перемешивание продолжают в гвченве еще 15 мин. После отстаивани катализатор отфильтровывают промывают на фильтре дистилл том, формуют через отверсти диаметром 3 мм, высуш№вают , измельчают в гранулы, размером 1-3 м и прокаливают при 40О С.water. With stirring, the resulting solution is slowly poured into a solution of 53.5 g of IfasHPO -lZHjp in 48 O ml of water. Stirring is continued in gvchenva for another 15 minutes. After settling, the catalyst is filtered off, washed on the filter with distillate, molded through 3 mm holes, dried, ground into granules, 1-3 m in size, and calcined at 40 ° C.
Приме р 2. Окисление диме тилового эфира.Example 2: Oxidation of dimethyl ether.
Через 30 мл катализатора, загруженного в кварцевую трубку диаметром 20 мм, снабженную электрообогревом, пропускают в течение 2,5 ч при 575 С в середине сло катализатора CMect диметилового эфира (1,1 л/ч) и воздуха ( л/ч), насыщенную парами воды при 50 С. После охлаждени парогазовой смеси получают в приемн ке 11,8 мл реакционной воды, содержащей 4,58 г формалвдегида, и 0,3 г. формальдегида на1сЬд тв воде изгазопромывател . Выход формальдегида составл ет 72% от теоретического .After 30 ml of catalyst loaded in a quartz tube with a diameter of 20 mm, equipped with electrical heating, is passed for 2.5 hours at 575 ° C in the middle of the CMect catalyst layer of dimethyl ether (1.1 l / h) and air (l / h), saturated water vapor at 50 ° C. After cooling the vapor-gas mixture, 11.8 ml of reaction water containing 4.58 g of formaldehyde and 0.3 g of formaldehyde are obtained in the reception of water and a gas scrubber. Formaldehyde yield is 72% of theoretical.
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Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU6901343274A SU294465A1 (en) | 1969-06-30 | 1969-06-30 | Method of preparing phormaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU6901343274A SU294465A1 (en) | 1969-06-30 | 1969-06-30 | Method of preparing phormaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU294465A1 true SU294465A1 (en) | 1977-09-25 |
Family
ID=20446350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU6901343274A SU294465A1 (en) | 1969-06-30 | 1969-06-30 | Method of preparing phormaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU294465A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4435602A (en) | 1982-07-26 | 1984-03-06 | Shell Oil Company | Conversion of dimethyl ether to formaldehyde |
| US4439624A (en) * | 1982-10-07 | 1984-03-27 | Shell Oil Company | Conversion of dimethyl ether to formaldehyde using Bi-Mo-Cu catalyst |
| US4442307A (en) * | 1982-10-07 | 1984-04-10 | Shell Oil Company | Conversion of dimethyl ether to formaldehyde using Bi-Mo-Fe catalyst |
-
1969
- 1969-06-30 SU SU6901343274A patent/SU294465A1/en active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4435602A (en) | 1982-07-26 | 1984-03-06 | Shell Oil Company | Conversion of dimethyl ether to formaldehyde |
| US4439624A (en) * | 1982-10-07 | 1984-03-27 | Shell Oil Company | Conversion of dimethyl ether to formaldehyde using Bi-Mo-Cu catalyst |
| US4442307A (en) * | 1982-10-07 | 1984-04-10 | Shell Oil Company | Conversion of dimethyl ether to formaldehyde using Bi-Mo-Fe catalyst |
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