SU136732A1 - The method of cleaning technical diphenylolpropane - Google Patents

The method of cleaning technical diphenylolpropane

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Publication number
SU136732A1
SU136732A1 SU671461A SU671461A SU136732A1 SU 136732 A1 SU136732 A1 SU 136732A1 SU 671461 A SU671461 A SU 671461A SU 671461 A SU671461 A SU 671461A SU 136732 A1 SU136732 A1 SU 136732A1
Authority
SU
USSR - Soviet Union
Prior art keywords
diphenylolpropane
recrystallization
chlorobenzene
cleaning technical
technical
Prior art date
Application number
SU671461A
Other languages
Russian (ru)
Inventor
П.М. Богатырев
М.Р. Гейниш
Г.А. Левкович
Б.Р. Лившиц
Э.И. Корф
Original Assignee
П.М. Богатырев
М.Р. Гейниш
Г.А. Левкович
Б.Р. Лившиц
Э.И. Корф
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by П.М. Богатырев, М.Р. Гейниш, Г.А. Левкович, Б.Р. Лившиц, Э.И. Корф filed Critical П.М. Богатырев
Priority to SU671461A priority Critical patent/SU136732A1/en
Application granted granted Critical
Publication of SU136732A1 publication Critical patent/SU136732A1/en

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Description

Способ очистки технического дифенилолпропана перекристаллизацией (из хлорбензола после удалени  воды) известен.The method of purification of technical diphenylolpropane by recrystallization (from chlorobenzene after removal of water) is known.

Предлагаетс  производить очистку технического дифенилолпропана с влажностью 30% и выше (не отдел   воды) путем перекристаллизации из хлорбензола.It is proposed to purify technical diphenylolpropane with a moisture content of 30% and higher (no water section) by recrystallization from chlorobenzene.

Предложенный способ позвол ет получать более чистый продукт за счет лучшего растворени  примесей в воде и температуры при перекристаллизации (устранение осмолени ). Срок процесса перекристаллизации сокрашаетс  (примерно на 20%) и ведетс  в более м гких услови х. Продукт получаетс  лучшего качества, дифенилолпропан приобретает более светлую окраску и плавитс  при температуре 153- 156°. Тогда как при перекристаллизации дифенилолпропана из безводного хлорбензола температура плавлени  была 152-154, а окраска темна .The proposed method allows a more pure product to be obtained by better dissolving impurities in water and temperature during recrystallization (elimination of tar). The duration of the recrystallization process is shortened (by about 20%) and conducted under milder conditions. The product is of better quality, diphenylolpropane becomes lighter in color and melts at a temperature of 153-156 °. Whereas, upon recrystallization of diphenylolpropane from anhydrous chlorobenzene, the melting point was 152-154, and the color was dark.

Пример перекристаллизации. В реактор загружают хлорбензол и технический дифенилолпропан с влажностью 30% в весовом отношении соответственно 3:1. Суспензию нагревают при перемешивании до температуры 75° и выдерживают 30 мин. Затем раствор пропускают через друк-фильтр дл  удалени  механических и нерастворимых примесей и охлаждают в механическом кристаллизаторе до 20°. Кристаллы отдел ют , промывают и сушат при 120°. Температура плавлени  готового продукта 153-156°. Хлорбензольный маточник регенерируют путем отгонки и без отделени  азеотропной смеси. По мере накоплени  воды в хлорбензольном маточнике ее уда.п ют при регенерации через каждые 5-6 циклов.An example of recrystallization. Chlorobenzene and technical diphenylolpropane with a moisture content of 30% in a weight ratio of 3: 1 are loaded into the reactor. The suspension is heated with stirring to a temperature of 75 ° and incubated for 30 minutes Then the solution is passed through a filter to remove mechanical and insoluble impurities and cooled in a mechanical crystallizer to 20 °. The crystals are separated, washed and dried at 120 °. The melting point of the finished product is 153-156 °. The chlorobenzene mother liquor is regenerated by distillation and without separating the azeotropic mixture. As water accumulates in the chlorobenzene mother liquor, it is removed during regeneration every 5–6 cycles.

№ 136732- 2 -No. 136732-2 -

jiПредметизобретени jiImplements

зСпособ очистки технического дифенилолпропана перекристаллизацие| ,;.о т л и ч а ю щ и и с   тем, что, в цел х устранени  темной окраски продукта, технический дифенилол пропан с влажностью 30% и выше, не отдел   воды, перекристаллизовывают из хлорбензола.Method for purifying technical diphenylolpropane by recrystallization | ,;. about tl and h and y and with the fact that, in order to eliminate the dark color of the product, technical diphenylol propane with a humidity of 30% and above, not a water section, is recrystallized from chlorobenzene.

SU671461A 1960-06-25 1960-06-25 The method of cleaning technical diphenylolpropane SU136732A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU671461A SU136732A1 (en) 1960-06-25 1960-06-25 The method of cleaning technical diphenylolpropane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU671461A SU136732A1 (en) 1960-06-25 1960-06-25 The method of cleaning technical diphenylolpropane

Publications (1)

Publication Number Publication Date
SU136732A1 true SU136732A1 (en) 1960-11-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU671461A SU136732A1 (en) 1960-06-25 1960-06-25 The method of cleaning technical diphenylolpropane

Country Status (1)

Country Link
SU (1) SU136732A1 (en)

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