SU685634A1

SU685634A1 - Method of porifying waste water in phenolformaldehyde resin production

Info

Publication number: SU685634A1
Application number: SU762350639A
Authority: SU
Inventors: Маргарита Васильевна Чарина; Ольга Филипповна Исаева; Роман Федорович Тихонов; Валерий Алексеевич Демин
Original assignee: Уральский лесотехнический институт; Бобровский Изоляционный Завод
Priority date: 1976-04-14
Filing date: 1976-04-14
Publication date: 1979-09-15

Description

Соотношение массы древесины и надсмольной воды Is3.The ratio of the mass of wood and the resin water Is3.

Смесь перемешивают и нагревают и поддерживают режим по таблице.The mixture is stirred and heated and maintained on the table.

Конденсат имеет состав,;The condensate has a composition;

Фенол 0,02-0,08 (в зависимости от продолжительности 5 стадииPhenol 0.02-0.08 (depending on the duration of stage 5

Формальдегид 0,01 Окисл емость 2000 мг , рН 7,5,Formaldehyde 0.01 Oxidative capacity 2000 mg, pH 7.5,

4444

После охлаждени из продукта получают издели методом гор чего прессовани . Продолжительность вьщержки при и 500 кг/см составл ет 15 мин.After cooling, hot pressing is obtained from the product. The delivery time at and 500 kg / cm is 15 minutes.

Способ обеспечивает полную утилиэацию смолистых веществ; до 98% фенолов и 99% формальдегида, содержащихс в надсмольных водах, сокращение количества отход щих растворов и повьшение производительности процесса,The method provides full utilization of resinous substances; up to 98% of phenols and 99% of formaldehyde contained in supra-resin waters, reducing the amount of waste solutions and increasing the productivity of the process,

Гидроокись аммони и гидроокись бари , содержащиес в надсмольной водеAmmonium hydroxide and barium hydroxide contained in tar-resin water

Ввод гидроокиси аммони до рН 8,5Enter ammonium hydroxide to pH 8.5

Ввод ги,цроокиси натри в количестве 3,0 вес.% от надсмольноЯ водыInput of sodium hydroxide in the amount of 3.0 wt.% From the tar water

Claims

1. A method for purifying supra-resin water produced by phenol-formaldehyde resins, including the introduction of sawdust followed by polycondensation to obtain products suitable for the manufacture of press compositions, characterized in that

In order to increase the degree of purification and to obtain a thermosetting polycondensation product, the polycondensation is carried out in the presence of barium and ammonium hydroxides, and then sodium hydroxide.

2. The method according to claim 1, characterized in that the sawdust

98

98 80

4% formaldehyde in relation to the resin water

80

and the tar water is introduced in a mass ratio of 1: 3.

.3. The method according to paragraphs. 1.2, about tl and h ay u and in order that barium hydroxide is used in an amount of 0.23, 0%, ammonium hydroxide is 0.1-1.0%, and sodium hydroxide is used in an amount of 2.0- 6.0% to the pitch water.

Sources of information taken into account in the examination

1. Nikitin N.N. Wood Chemistry, Publishing House, Academy of Sciences of the USSR, ML., 1951, p.457.

2. Korshak V.V., Vinogradova S.V. Polycondensation in equilibrium, M., Nauka, 1972.

3. USSR author's certificate 420572, cl. C 02 C 5/02, 1971.