CN104163449A - Preparation method of gamma-copper iodide - Google Patents
Preparation method of gamma-copper iodide Download PDFInfo
- Publication number
- CN104163449A CN104163449A CN201410402480.4A CN201410402480A CN104163449A CN 104163449 A CN104163449 A CN 104163449A CN 201410402480 A CN201410402480 A CN 201410402480A CN 104163449 A CN104163449 A CN 104163449A
- Authority
- CN
- China
- Prior art keywords
- iodine
- iodide
- cuprous iodide
- preparation
- hydrazine hydrate
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 37
- 239000011630 iodine Substances 0.000 claims abstract description 37
- 229910021595 Copper(I) iodide Inorganic materials 0.000 claims abstract description 27
- 239000000243 solution Substances 0.000 claims abstract description 20
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims abstract description 15
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims abstract description 15
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 claims abstract description 13
- 229940006461 iodide ion Drugs 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 229910000365 copper sulfate Inorganic materials 0.000 claims abstract description 10
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000007864 aqueous solution Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 7
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 150000002496 iodine Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- LSXDOTMGLUJQCM-UHFFFAOYSA-M copper(i) iodide Chemical compound I[Cu] LSXDOTMGLUJQCM-UHFFFAOYSA-M 0.000 description 1
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 description 1
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910052950 sphalerite Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- -1 ultra-high counters Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明公开了一种γ-碘化亚铜的制备方法，包括如下步骤：将碘加入水中，然后将水合肼加入碘的水溶液中混合反应，控制碘与水的摩尔比1:50-90，水合肼与碘摩尔比4.1-4.5:1.0，得碘离子溶液；在搅拌作用下，将碘离子溶液加入硫酸铜溶液中，控制硫酸铜与碘摩尔比2.0-2.2:1.0、充分反应，过滤，烘干得到γ-碘化亚铜。本发明碘利用率高、产品不易氧化分解、生产成本低、工艺简单。The invention discloses a preparation method of γ-cuprous iodide, comprising the following steps: adding iodine into water, then adding hydrazine hydrate into the iodine aqueous solution for mixed reaction, controlling the molar ratio of iodine to water to 1:50-90, The molar ratio of hydrazine hydrate to iodine is 4.1-4.5:1.0 to obtain iodide ion solution; under stirring, the iodide ion solution is added to the copper sulfate solution, and the molar ratio of copper sulfate to iodine is controlled to be 2.0-2.2:1.0, fully reacted, filtered, Dry to obtain γ-cuprous iodide. The invention has high iodine utilization rate, the product is not easy to oxidize and decompose, the production cost is low, and the process is simple.
Description
技术领域 technical field
本发明涉及化工技术领域，具体来说涉及一种γ-碘化亚铜的制备方法。 The invention relates to the technical field of chemical industry, in particular to a preparation method of γ-cuprous iodide.
the
背景技术 Background technique
γ-碘化亚铜（γ-CuI）属闪锌矿结构,能带间隙3.1eV,稳定性不高，易氧化分解。可用于太阳能电池、超导材料、光催化剂、超高计数器、食品及饲料添加剂等领域，用途广泛，附加值高。 γ-Cuprous iodide (γ-CuI) belongs to sphalerite structure, energy band gap 3.1eV, low stability, easy to oxidize and decompose. It can be used in the fields of solar cells, superconducting materials, photocatalysts, ultra-high counters, food and feed additives, etc., and has a wide range of uses and high added value.
目前，γ-碘化亚铜的合成主要是采用液相沉淀法，分别以可溶性铜盐（硫酸铜、醋酸铜等）和可溶性碘盐（碘化钠、碘化钾等）为铜源和碘源，水为溶剂进行化学沉淀反应制得。但该方法存在不足，主要是制备过程中会产生大量游离碘（初始产物碘化铜不稳定转化为碘化亚铜时副产游离碘），产物分离困难致使碘利用率降低，生产成本增高；采用有机溶剂对产物混合液进行游离碘萃取回收，操作步骤复杂，且因游离碘回收效果不佳造成碘资源浪费。 At present, the synthesis of γ-cuprous iodide mainly adopts liquid phase precipitation method, using soluble copper salt (copper sulfate, copper acetate, etc.) and soluble iodine salt (sodium iodide, potassium iodide, etc.) as copper source and iodine source respectively. Water is used as a solvent for chemical precipitation reaction. However, there are deficiencies in this method, mainly because a large amount of free iodine will be produced during the preparation process (free iodine is produced as a by-product when the initial product copper iodide is unstable and converted into cuprous iodide), and the difficulty in product separation leads to a decrease in iodine utilization and increased production costs; Extraction and recovery of free iodine from the product mixture with an organic solvent is complicated, and iodine resources are wasted due to poor recovery of free iodine.
the
发明内容 Contents of the invention
本发明的目的在于克服上述缺点而提供的一种碘利用率高、产品不易氧化分解、生产成本低、工艺简单的γ-碘化亚铜的制备方法。 The object of the present invention is to overcome the above-mentioned shortcoming and provide a kind of preparation method of gamma-cuprous iodide with high iodine utilization rate, difficult oxidation decomposition of product, low production cost and simple process.
本发明的一种γ-碘化亚铜的制备方法，包括如下步骤： A kind of preparation method of gamma-cuprous iodide of the present invention, comprises the steps:
（1）水合肼还原碘反应：将碘加入水中，然后将水合肼加入碘的水溶液中混合反应，控制碘与水的摩尔比1:50-90，水合肼与碘摩尔比4.1-4.5:1.0，得碘离子溶液； (1) Reduction of iodine with hydrazine hydrate: add iodine to water, then add hydrazine hydrate to the aqueous solution of iodine for mixed reaction, control the molar ratio of iodine to water at 1:50-90, and the molar ratio of hydrazine hydrate to iodine at 4.1-4.5:1.0 , to obtain iodide ion solution;
（2）γ-碘化亚铜的制备：在搅拌作用下，将碘离子溶液加入硫酸铜溶液中，控制硫酸铜与碘摩尔比2.0-2.2:1.0、搅拌速度200-600r·min-1、滴加速度5-15mL·min-1，充分反应10-20min，过滤，烘干得到γ-碘化亚铜。 (2) Preparation of γ-cuprous iodide: under stirring, add iodide ion solution into copper sulfate solution, control the molar ratio of copper sulfate to iodine 2.0-2.2:1.0, stirring speed 200-600r·min -1 , The dropping rate is 5-15mL·min -1 , fully reacted for 10-20min, filtered, and dried to obtain γ-cuprous iodide.
本发明与现有技术相比，具有明显的有益效果，从以上技术方案可知：本发明以较低价格的单质碘替代可溶性碘盐作为碘源，降低了原料成本；反应过程中副产的游离碘被还原为碘离子，反应完全，避免了碘单质的生成，产物易分离，提高了γ-碘化亚铜产量；还原剂水合肼可防止γ-碘化亚铜产品的氧化分解，提高了产品质量；整个反应过程产生氮气，对环境无污染，反应条件易于控制，简易设备即可实现连续化生产。 Compared with the prior art, the present invention has obvious beneficial effects. It can be known from the above technical schemes that: the present invention replaces soluble iodine salt with lower-priced elemental iodine as the iodine source, which reduces the cost of raw materials; free by-products in the reaction process Iodine is reduced to iodide ion, the reaction is complete, avoiding the generation of iodine simple substance, the product is easy to separate, and the output of γ-cuprous iodide is improved; the reducing agent hydrazine hydrate can prevent the oxidative decomposition of γ-cuprous iodide product, which improves the production efficiency of γ-cuprous iodide. Product quality; the whole reaction process produces nitrogen, no pollution to the environment, the reaction conditions are easy to control, and continuous production can be realized with simple equipment.
下面通过具体实施方式对本发明作进一步说明。 The present invention will be further described below through specific embodiments.
the
具体实施方式 Detailed ways
实施例1Example 1
一种γ-碘化亚铜的制备方法，包括下述步骤： A preparation method for gamma-cuprous iodide, comprising the steps of:
（1）水合肼还原碘反应：将25.64g 质量浓度为99％的碘加入90g水中，然后将25.66g 质量浓度为80％的水合肼加入碘的水溶液中混合反应，得碘离子溶液； (1) Reduction of iodine with hydrazine hydrate: add 25.64g of iodine with a mass concentration of 99% to 90g of water, then add 25.66g of hydrazine hydrate with a mass concentration of 80% to the aqueous solution of iodine for a mixed reaction to obtain an iodide ion solution;
（2）γ-碘化亚铜的制备：在200r·min-1搅拌作用下，将碘离子溶液以5mL·min-1流速加入50.44g质量浓度为99％硫酸铜溶液中，充分反应10min，过滤，烘干得到γ-碘化亚铜。 (2) Preparation of γ-cuprous iodide: under stirring at 200r·min -1 , add iodide ion solution at a flow rate of 5mL·min -1 into 50.44g of copper sulfate solution with mass concentration of 99%, fully react for 10min, Filter and dry to obtain γ-cuprous iodide.
the
实施例2 Example 2
一种γ-碘化亚铜的制备方法，包括下述步骤： A preparation method for gamma-cuprous iodide, comprising the steps of:
（1）水合肼还原碘反应：将25.64g质量浓度为99％的碘加入126g水中，然后将26.91g质量浓度为80％的水合肼加入碘的水溶液中混合反应，得碘离子溶液； (1) Reduction of iodine with hydrazine hydrate: Add 25.64 g of iodine with a mass concentration of 99% to 126 g of water, then add 26.91 g of hydrazine hydrate with a mass concentration of 80% to the aqueous solution of iodine for a mixed reaction to obtain an iodide ion solution;
（2）γ-碘化亚铜的制备：在400r·min-1搅拌作用下，将碘离子溶液以10mL·min-1流速加入52.96g质量浓度为99％硫酸铜溶液中，充分反应15 min，过滤，烘干得到γ-碘化亚铜。 (2) Preparation of γ-cuprous iodide: under stirring at 400r·min -1 , add iodide ion solution into 52.96g of 99% copper sulfate solution at a flow rate of 10mL·min -1 and fully react for 15 min , filtered, and dried to obtain γ-cuprous iodide.
the
实施例3Example 3
一种γ-碘化亚铜的制备方法，包括下述步骤： A preparation method for gamma-cuprous iodide, comprising the steps of:
（1）水合肼还原碘反应：将25.64g质量浓度为99％的碘加入162g水中，然后将28.16g质量浓度为80％的水合肼加入碘的水溶液中混合反应，得碘离子溶液； (1) Reduction of iodine with hydrazine hydrate: Add 25.64 g of iodine with a mass concentration of 99% to 162 g of water, then add 28.16 g of hydrazine hydrate with a mass concentration of 80% to the iodine aqueous solution for a mixed reaction to obtain an iodide ion solution;
（2）γ-碘化亚铜的制备：在600r·min-1搅拌作用下，将碘离子溶液以15mL·min-1流速加入50.44g质量浓度为99％硫酸铜溶液中，充分反应20 min，过滤，烘干得到γ-碘化亚铜。 (2) Preparation of γ-cuprous iodide: under stirring at 600r·min -1 , add iodide ion solution at a flow rate of 15mL·min -1 into 50.44g copper sulfate solution with mass concentration of 99% and fully react for 20 min , filtered, and dried to obtain γ-cuprous iodide.
the
以上所述，仅是本发明的较佳实施例而已，并非对本发明做任何形式上的限制，任何未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所做的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。 The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form, and any simple modification made to the above embodiments according to the technical essence of the present invention does not depart from the content of the technical solution of the present invention. , equivalent changes and modifications all still belong to the scope of the technical solution of the present invention. the
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402480.4A CN104163449A (en) | 2014-08-16 | 2014-08-16 | Preparation method of gamma-copper iodide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410402480.4A CN104163449A (en) | 2014-08-16 | 2014-08-16 | Preparation method of gamma-copper iodide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104163449A true CN104163449A (en) | 2014-11-26 |
Family
ID=51907458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410402480.4A Pending CN104163449A (en) | 2014-08-16 | 2014-08-16 | Preparation method of gamma-copper iodide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104163449A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825990A (en) * | 2016-03-30 | 2016-08-03 | 淮北师范大学 | A kind of preparation method of CuI-Fe3O4 magnetic nanocomposite |
| CN105858711A (en) * | 2016-03-30 | 2016-08-17 | 淮北师范大学 | Preparation method of CuI-graphene oxide nanocomposite |
| CN105883895A (en) * | 2016-05-25 | 2016-08-24 | 浙江汇能生物股份有限公司 | Preparation method of copper iodide |
| CN107200345A (en) * | 2017-03-20 | 2017-09-26 | 宁波大学 | A kind of preparation method of γ cuprous iodides |
| CN107583656A (en) * | 2017-09-14 | 2018-01-16 | 华中科技大学 | A kind of self-supporting Cu/CuI catalysis materials and preparation method thereof |
| CN108455654A (en) * | 2018-04-18 | 2018-08-28 | 贵州大学 | A kind of preparation method of the nanometer γ-CuI based on microfabricated chemical reactor technology |
| CN108557867A (en) * | 2018-04-18 | 2018-09-21 | 贵州大学 | A kind of preparation method of nanometer of γ-CuI |
| CN108609644A (en) * | 2018-03-21 | 2018-10-02 | 陈亚 | A kind of recovery method of copper ion |
| CN108675484A (en) * | 2018-03-21 | 2018-10-19 | 陈亚 | A kind of recovery method of copper ion |
| CN112429753A (en) * | 2020-12-31 | 2021-03-02 | 江西赣锋锂业股份有限公司 | Method for preparing high-purity cesium iodide from cesium carbonate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609285A (en) * | 2004-09-21 | 2005-04-27 | 同济大学 | Novel CuI crystal and its growth method |
-
2014
- 2014-08-16 CN CN201410402480.4A patent/CN104163449A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1609285A (en) * | 2004-09-21 | 2005-04-27 | 同济大学 | Novel CuI crystal and its growth method |
Non-Patent Citations (2)
| Title |
|---|
| 刘飞等: "利用液相沉淀法制备纳米球形碘化亚铜晶体", 《大连工业大学学报》 * |
| 刘飞等: "多晶形γ-CuI晶体的制备与导电性能表征", 《人工晶体学报》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825990A (en) * | 2016-03-30 | 2016-08-03 | 淮北师范大学 | A kind of preparation method of CuI-Fe3O4 magnetic nanocomposite |
| CN105858711A (en) * | 2016-03-30 | 2016-08-17 | 淮北师范大学 | Preparation method of CuI-graphene oxide nanocomposite |
| CN105858711B (en) * | 2016-03-30 | 2018-03-13 | 淮北师范大学 | A kind of preparation method of CuI stannic oxide/graphene nano composites |
| CN105883895A (en) * | 2016-05-25 | 2016-08-24 | 浙江汇能生物股份有限公司 | Preparation method of copper iodide |
| CN107200345A (en) * | 2017-03-20 | 2017-09-26 | 宁波大学 | A kind of preparation method of γ cuprous iodides |
| CN107200345B (en) * | 2017-03-20 | 2019-05-03 | 宁波大学 | A kind of preparation method of γ-cuprous iodide |
| CN107583656A (en) * | 2017-09-14 | 2018-01-16 | 华中科技大学 | A kind of self-supporting Cu/CuI catalysis materials and preparation method thereof |
| CN108675484A (en) * | 2018-03-21 | 2018-10-19 | 陈亚 | A kind of recovery method of copper ion |
| CN108609644A (en) * | 2018-03-21 | 2018-10-02 | 陈亚 | A kind of recovery method of copper ion |
| CN108609644B (en) * | 2018-03-21 | 2020-09-11 | 陈亚 | Copper ion recovery method |
| CN108675484B (en) * | 2018-03-21 | 2021-02-05 | 陈亚 | Copper ion recovery method |
| CN108557867A (en) * | 2018-04-18 | 2018-09-21 | 贵州大学 | A kind of preparation method of nanometer of γ-CuI |
| CN108455654A (en) * | 2018-04-18 | 2018-08-28 | 贵州大学 | A kind of preparation method of the nanometer γ-CuI based on microfabricated chemical reactor technology |
| CN112429753A (en) * | 2020-12-31 | 2021-03-02 | 江西赣锋锂业股份有限公司 | Method for preparing high-purity cesium iodide from cesium carbonate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104163449A (en) | Preparation method of gamma-copper iodide | |
| CN103962078B (en) | A kind of gas hydrate promoter for generation | |
| CN104003443B (en) | A kind of method adding JZPD capsule ammonium meta-vanadate | |
| WO2017121280A1 (en) | Method for continuously producing battery-grade lithium carbonate | |
| CN105396605B (en) | A kind of preparation method of silicate clay/copper/nitridation carbon composite | |
| US12129183B2 (en) | Method for preparing basic copper carbonate | |
| CN104150499A (en) | Preparation method of high-purity boric acid and nuclear grade high-purity boric acid | |
| WO2019144475A1 (en) | Method for preparing high-valence iron salt | |
| CN104368369B (en) | A kind of preparation method of silver phosphate-cadmium sulfide compounded visible light photocatalyst | |
| CN104370830B (en) | A kind of synthetic method of 5-trifluoromethyl uracil | |
| CN112028087A (en) | AlPO-15 molecular sieve doped with transition metal element and preparation method thereof | |
| CN103319326A (en) | Preparation method for vanadyl oxalate | |
| CN107840312B (en) | Method for removing mercury in acid making process by lead-zinc smelting flue gas | |
| CN105480965A (en) | Preparation method of graphene | |
| CN104556198A (en) | Continuous production method and application of ultrafine cuprous oxide | |
| CN103910370B (en) | A method for extracting aluminum hydroxide from fly ash by ammonium salt dissolution and circulating ammonia | |
| CN103739571A (en) | Synthesis method of phenyl glycidyl ether | |
| CN104529835B (en) | A kind of ozone and hydrogen peroxide combined oxidation hydrazo-dicarbonamide produce the method for Cellmic C 121 | |
| CN102886271B (en) | Method for preparing catalyst for assisting in converting ammonia nitrogen in circuit board sewage | |
| CN102976914B (en) | Method for preparing p-benzoquinone | |
| CN105153002A (en) | Method for synthesizing TD (thiourea dioxide) at low temperature | |
| CN102285679B (en) | Preparation method of copper oxide powder | |
| CN104627964B (en) | Method for preparing bromine by using brine | |
| CN104445085B (en) | A kind of method utilizing acidic iron-based ionic liquid to catalyze the oxidation of hydrogen sulfide | |
| CN103668425B (en) | A kind of method utilizing hydroxyapatite to reclaim copper whisker in copper-containing solution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141126 |