SU448210A1 - The method of obtaining yellow pigment based on lead chromate - Google Patents
The method of obtaining yellow pigment based on lead chromateInfo
- Publication number
- SU448210A1 SU448210A1 SU1752953A SU1752953A SU448210A1 SU 448210 A1 SU448210 A1 SU 448210A1 SU 1752953 A SU1752953 A SU 1752953A SU 1752953 A SU1752953 A SU 1752953A SU 448210 A1 SU448210 A1 SU 448210A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- yellow pigment
- lead chromate
- pigment based
- obtaining yellow
- chromate
- Prior art date
Links
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- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Description
1one
Изобретение относитс к способу получени желтого пигмента на основе хромата свинца, примен ющегос , в частности, в качестве кроющего пигмента.This invention relates to a method for producing a yellow lead chromate pigment, which is used, in particular, as a coating pigment.
Известен способ получени пигментов на основе хромата свинца путем взаимодействи нитрата свинца, жидкого стекла, бихромата натри при 60°С и рН 5,5-6.A known method for producing lead chromate-based pigments by reacting lead nitrate, water glass, sodium dichromate at 60 ° C and pH 5.5-6.
Предложенный способ отличаетс от известного тем, что процесс ведут в две стадии, на первой из которых осуществл ют взаимодействие раствора нитрата свинца с силикатом натри при рН 10-12, а на второй в полученную реакционную смесь ввод т хромат натрл при рН 6-7.The proposed method differs from the well-known fact that the process is carried out in two stages, the first of which is the interaction of lead nitrate solution with sodium silicate at pH 10-12, and the second in the resulting reaction mixture sodium chromate is introduced at pH 6-7.
Это обеспечивает улучщение мал рно-технических характеристик.This provides improved technical performance.
П р и м е р 1. К 2,9 л раствора нитрата свинца с .концентрацией 71,5 г/л в пересчете на РЬО при температуре 25°С медленно, в течение 1,5 час, приливают 7,5 л жидкого стекла с концентрацией 20 г/л в пересчете на SiOaРеакционную массу с рН 10,8 перемещивают около 30 мин и затем медленно, в течение 1,5 час, ввод т 1,6 л раствора монохромата натри с концентрацией 25,5 г/л в пересчете на СгОз и затем величину рН пульпы с 10,0 снижают до 6,5 путем введени 0,17 л 45%-ной серной кислоты. Полученную пульпу выдерживают 0,5 час при посто нном перемешиваНИИ , а затем фильтруют, осадок отмывают от водорастворимых примесей и сущат при 90- 100°С, получа желтый пигмент со следующими цветовыми и мал рно-техническими свойствами:PRI me R 1. To a 2.9 l solution of lead nitrate with a concentration of 71.5 g / l in terms of PbO at a temperature of 25 ° C slowly, over 1.5 hours, pour 7.5 liters of liquid glass with a concentration of 20 g / l in terms of SiOa. The reaction mass with a pH of 10.8 is moved for about 30 minutes and then, over a period of 1.5 hours, 1.6 l of sodium monochromate solution is introduced with a concentration of 25.5 g / l in terms of CrOz and then the pH value of the pulp is reduced from 10.0 to 6.5 by adding 0.17 L of 45% sulfuric acid. The resulting pulp is kept for 0.5 hour with constant stirring, and then filtered, the precipitate is washed of water-soluble impurities and existing at 90-100 ° C to obtain a yellow pigment with the following color and low-tech properties:
Чистота тона, %84Pure tones,% 84
Длина волны, мк587Wavelength, mk587
Укрывистость, ,5Coverage, 5
Пример 2. Способ осуществл ют аналогично примеру 1, но исходный раствор монохромата натри ввод т в количестве 3,6 л, получа желтый пигмент аналогичного качества .Example 2. The method is carried out analogously to example 1, but the initial solution of sodium monochromate is introduced in an amount of 3.6 liters, obtaining a yellow pigment of similar quality.
Пример 3. Способ осуществл ют аналогично примеру 1, но вместе с исходным раствором монохромата ввод т сульфат натри в отношении 0,5 моль SO4 на 1 моль СгОз, получа желтый пигмент со следующими цветовыми и мал рно-техническими свойствами: Чистота тона, %82Example 3. The method is carried out analogously to example 1, but sodium sulfate is added together with the initial solution of monochromat in a ratio of 0.5 mol SO4 to 1 mol CgOz to obtain a yellow pigment with the following color and low technical properties: Purity of tone,% 82
Длина волны, км585Wavelength, km585
Укрывистость, Hiding power
Предмет изобретени Subject invention
Способ получени желтого пигмента на основе хромата свинца путем взаимодействи водного раствора нитрата свинца с хроматом и силикатом щелочного металла с последую3 щим отделением образовавшегос осадка, промывкой его и сушкой, отличаюш,ийс тем, что, с целью улучшени мал рно-технических характеристик, процесс ведут в две стадии при 4 взаимодействии раствора нитрата свинца с силикатом натри при рН 10-12 на первой из них и хроматом щелочного металла при рН б-7 на второй.The method of obtaining a yellow lead chromate pigment by reacting an aqueous solution of lead nitrate with chromate and alkali metal silicate with the subsequent separation of the precipitate formed, washing it and drying, is characterized by the fact that, in order to improve low-technical characteristics, the process in two stages with 4 interaction of lead nitrate solution with sodium silicate at pH 10-12 on the first of them and alkali metal chromate at pH b-7 on the second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1752953A SU448210A1 (en) | 1972-02-28 | 1972-02-28 | The method of obtaining yellow pigment based on lead chromate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1752953A SU448210A1 (en) | 1972-02-28 | 1972-02-28 | The method of obtaining yellow pigment based on lead chromate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU448210A1 true SU448210A1 (en) | 1974-10-30 |
Family
ID=20504631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1752953A SU448210A1 (en) | 1972-02-28 | 1972-02-28 | The method of obtaining yellow pigment based on lead chromate |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU448210A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2305476A1 (en) * | 1975-03-24 | 1976-10-22 | Du Pont | PREPARATION OF LEAD CHROMATE PIGMENT WITH IMPROVED THERMAL STABILITY AND THE PIGMENT THUS PREPARED |
-
1972
- 1972-02-28 SU SU1752953A patent/SU448210A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2305476A1 (en) * | 1975-03-24 | 1976-10-22 | Du Pont | PREPARATION OF LEAD CHROMATE PIGMENT WITH IMPROVED THERMAL STABILITY AND THE PIGMENT THUS PREPARED |
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