SU1270156A1

SU1270156A1 - Method of removing aminoformaldehyde resin depositions from devices

Info

Publication number: SU1270156A1
Application number: SU843764004A
Authority: SU
Inventors: Автандил Адгозал оглы Мехтиев; Лидия Николаевна Смирнова; Екатерина Сергеевна Потехина; Нина Дмитриевна Эксанова
Priority date: 1984-07-03
Filing date: 1984-07-03
Publication date: 1986-11-15

Abstract

Изобретение относитс к области химической промышленности, в частности к области производства аминоформальдегидных смол (АФС). Иэобретег ние позвол ет избавитьс от сточных ВОД- при очистке различных устройств от отложений АФС. В соответствии с изобретением загр зненные отложени ми АФС устройства промываютс при 20-80&deg;С техническим формалином при соотношении 200-800 мае,ч. формалина на 1 мае.ч. смолы. Формалин после очистки устройств используетс дл синтеза аминоформальдегидных смол в смеси с техническим формалином в количествах до 10 мас.%. (Л СThis invention relates to the chemical industry, in particular, to the production of amino formaldehyde resins (APS). The proprietorship allows to get rid of the waste ESCs when cleaning various devices from APS deposits. In accordance with the invention, the APS contaminated with sediments of the device are washed at 20-80 ° C with technical formalin at a ratio of 200-800 May, h. formalin on 1 mac. resin. Formalin, after purification of devices, is used to synthesize amino formaldehyde resins mixed with technical formalin in amounts up to 10 wt.%. (Ls

Description

елate

Claims

o The invention relates to chemical impurities, in particular, to the production of amino formaldehyde resins (APS). The purpose of the invention is the elimination of wastewater during the purification of devices for the deposition of amino-formaldehyde resins. Example 1. Technical formalin in the amount of 1/3 of the reactor volume is loaded into the reactor for the synthesis of APS from formalin. The mixer is turned on and stirred for 4 hours. Then the contents of the reactor are pumped into the formalin storage tank and used for the intended purpose. The ratio of APS deposits to formally is approximately 1: 200. Primer

2. In a reactor for the synthesis of APS from a formalin tank, technical formalin is filled in an amount of 1/2 the volume of the reactor. The stirrer is turned on. The pH of the formin is adjusted to 6 with NaOH. The contents of the reactor are heated to 50 ° C and mixed for 3 hours. After that, the contents of the reactor are pumped to the formin tank and used according to the P15 destination. The ratio of FS 56 2 to formalin deposits is approximately 1: 800. Example

3. A formalin in the amount of 1/2 the volume of the tank is loaded into the railway tank car for transportation of ASF from a formalin tank. The ratio of sediment to formalin is approximately 1: 500. The contents of the tank are mixed with compressed air for 6 hours and then pumped into the formalin storage tank. Spent formalin after cleaning the tank is used for its intended purpose. Formalin, after purification of the devices, is used to synthesize amino-formaldehyde resins mixed with. technical formalin in amounts up to 10% by weight of technical formalin. DETAILED DESCRIPTION OF THE INVENTION The method for cleaning devices from amino-formaldehyde resin deposits by solvent treatment at 20-80 ° C, characterized in that technical formalin is used as a solvent in an amount of 200-800 mas. sediments.