CN1209290C - Method of preparing anhydrous aluminium chloride - Google Patents

Method of preparing anhydrous aluminium chloride Download PDF

Info

Publication number
CN1209290C
CN1209290C CN 02129997 CN02129997A CN1209290C CN 1209290 C CN1209290 C CN 1209290C CN 02129997 CN02129997 CN 02129997 CN 02129997 A CN02129997 A CN 02129997A CN 1209290 C CN1209290 C CN 1209290C
Authority
CN
China
Prior art keywords
aluminum chloride
anhydrous aluminum
chloride hexahydrate
liquid separation
solid
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.)
Expired - Fee Related
Application number
CN 02129997
Other languages
Chinese (zh)
Other versions
CN1482064A (en
Inventor
章浩龙
Original Assignee
章浩龙
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 章浩龙 filed Critical 章浩龙
Priority to CN 02129997 priority Critical patent/CN1209290C/en
Publication of CN1482064A publication Critical patent/CN1482064A/en
Application granted granted Critical
Publication of CN1209290C publication Critical patent/CN1209290C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The present invention discloses a method for preparing anhydrous aluminum chloride. In order that the technology for preparing anhydrous aluminum chloride is simple, no exhaust emission exists, and prepared anhydrous aluminum chloride has high purity, aluminum chloride hexahydrate is used as raw materials in the present invention; first, the aluminum chloride hexahydrate is prepared into water solution, alcohol is added into the aluminum chloride hexahydrate water solution, and the alcohol is c1 to c4; after crystals in the solution are completely precipitated, solid-liquid separation is carried out, and separated crystals are anhydrous aluminum chloride. In the production process of the method of the present invention, no exhaust emission exists; after the solid-liquid separation is carried out, the main components of the separated liquid are alcohol, and the alcohol can be recycled and reused; in addition, impurities in the aluminum chloride hexahydrate can be removed, and the purity of the anhydrous aluminum chloride can be increased.

Description

Preparation method of anhydrous aluminum chloride
Technical Field
The invention relates to a preparation method of inorganic salt, in particular to a preparation method of anhydrous aluminum chloride.
Background
Anhydrous aluminum chloride is widely used in organic synthesis catalysts, petroleum cracking catalysts, and the like, and is also widely used in synthesis of detergents, pesticides, dyes, perfumes, metal refining, and the like. At present, most enterprises generally adopt a metallic aluminum method to produce anhydrous aluminum chloride, and the specific method comprises the following steps: putting the preheated aluminum ingot into a closed chlorination reaction furnaceChlorine is sent into the furnace from the upper part along the guide pipe and reacts at the temperature of 800-: and the generated aluminum chloride enters a condenser through a sublimation pipe, and is captured and precipitated to be crystallized, so that a finished product is obtained. The process has the defects that the tail gas is washed by alkaline water in a washing tower during emission, and in addition, the production cost is high.
The process for preparing anhydrous aluminum chloride by using alumina powder-fixed bed method is described in inorganic salt industry handbook 510 published by chemical publishers in 1 month of 1996. The process takes aluminum oxide powder as a main raw material, coal as a reducing agent, pulp waste liquid as an adhesive and chlorine as an oxidizing agent, and the reaction is carried out in the environment of 850-950 ℃, wherein the reaction comprises the following steps: . The process has the following defects: firstly, the tail gas contains a small amount of chlorine and is discharged after being treated; secondly, the prepared anhydrous aluminum chloride has low purity, and the high-purity anhydrous aluminum chloride can be obtained only by sublimation refining; thirdly, the process is complicated.
Disclosure of Invention
Aiming at the defects, the invention provides the method for preparing the anhydrous aluminum chloride, so that the process for preparing the anhydrous aluminum chloride is simple, no waste gas is discharged, and the prepared anhydrous aluminum chloride has high purity.
In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of anhydrous aluminum chloride adopts aluminum chloride hexahydrate as a raw material, and comprises the following specific processes: preparing aluminum chloride hexahydrate into an aqueous solution, adding methanol or ethanol or n-propanol or ethylene glycol or diethylene glycol or propylene glycol into the aqueous solution of the aluminum chloride hexahydrate, wherein the concentration of the ethanol is 75-99.5%, carrying out solid-liquid separation after crystals in the solution are completely precipitated, and obtaining the separated crystals as anhydrous aluminum chloride.
According to the above method, water-insoluble impurities can be removed by filtration after aluminum chloride hexahydrate is prepared as an aqueous solution.
By adopting the method, no waste gas is discharged in the whole production process, and the main component of the liquid after solid-liquid separation is alcohol, so that the liquid can be recycled and reused, and the environmental protection is facilitated; in addition, in the preparation process, the purity of the anhydrous aluminum chloride can be further improved through the steps of filtering, crystallizing and the like, and experiments prove that the purity of the anhydrous aluminum chloride prepared by the method can reach 99.5 percent; meanwhile, the invention has simple process andlow production cost.
Detailed Description
Example 1
10 g of aluminum chloride hexahydrate is taken and put into a beaker, water is added for dissolving to prepare a solution, 95 percent ethanol is slowly poured into the beaker, after crystals in the beaker are fully separated out, solid-liquid separation is carried out in a centrifugal separator, and white crystals, namely the anhydrous aluminum chloride, are obtained. The concentration of ethanol poured in according to the above method may also be 75%, 99.5%. The solid-liquid separation according to the above method can also be carried out by other methods such as ordinary filtration. It is also possible to remove impurities by filtration after preparation of the aqueous solution.
Example 2
Taking 10 g of aluminum chloride hexahydrate, putting the aluminum chloride hexahydrate into a beaker, adding water to prepare an aqueous solution, filtering to remove impurities, slowly pouring commercially available methanol, and after crystals in the beaker are fully precipitated, carrying out solid-liquid separation in a centrifugal separator to obtain white crystals, namely the anhydrous aluminum chloride. The solid-liquid separation according to the above method can also be carried out by other methods such as ordinary filtration. Or filtering to remove impurities after preparing the aluminum chloride hexahydrate into an aqueous solution.
Example 3
Taking 10 g of aluminum chloride hexahydrate, putting the aluminum chloride hexahydrate into a beaker, adding water to prepare an aqueous solution, filtering to remove impurities, slowly pouring commercial n-propanol into the beaker, and after crystals in the beaker are fully precipitated, carryingout solid-liquid separation in a centrifugal separator to obtain white crystals, namely the anhydrous aluminum chloride. The solid-liquid separation according to the above method can also be carried out by other methods such as ordinary filtration. Or filtering to remove impurities after preparing the aluminum chloride hexahydrate into an aqueous solution.
Example 4
10 g of aluminum chloride hexahydrate is taken and put into a beaker, water is added to prepare an aqueous solution, after impurities are removed by filtration, commercial ethylene glycol is slowly poured into the beaker, and after crystals in the beaker are fully precipitated, solid-liquid separation is carried out in a centrifugal separator to obtain white crystals, namely the anhydrous aluminum chloride. The solid-liquid separation according to the above method can also be carried out by other methods such as ordinary filtration. Or filtering to remove impurities after preparing the aluminum chloride hexahydrate into an aqueous solution.
Example 5
Taking 10 g of aluminum chloride hexahydrate, putting the aluminum chloride hexahydrate into a beaker, adding water to prepare an aqueous solution, filtering to remove impurities, slowly pouring commercial diethylene glycol, and after crystals in the beaker are fully precipitated, carrying out solid-liquid separation in a centrifugal separator to obtain white crystals, namely the anhydrous aluminum chloride. The solid-liquid separation according to the above method can also be carried out by other methods such as ordinary filtration. Or filtering to remove impurities after preparing the aluminum chloride hexahydrate into an aqueous solution.
Example 6
Taking 10 g of aluminum chloride hexahydrate, putting the aluminum chloride hexahydrate into a beaker, adding water to prepare an aqueous solution, filtering to remove impurities, slowly pouring commercially available propylene glycol, and after crystals in the beaker are fully precipitated, carrying out solid-liquid separation in a centrifugal separator to obtain white crystals, namely the anhydrous aluminum chloride. The solid-liquid separation according to the above method can also be carried out by other methods such as ordinary filtration. The impurities can also be removed by preparing an aqueous solution from aluminum chloride hexahydrate.

Claims (3)

1. A preparation method of anhydrous aluminum chloride is characterized in that aluminum chloride hexahydrate is adopted as a raw material, and the specific process is as follows:
a. preparing aluminum chloride hexahydrate into an aqueous solution;
b. adding methanol or ethanol or n-propanol or ethylene glycol or diethylene glycol or propylene glycol into the aluminum chloride hexahydrate aqueous solution, wherein the concentration of the ethanol is 75-99.5%;
c. and carrying out solid-liquid separation after crystals in the solution are fully precipitated.
2. The method for preparing anhydrous aluminum chloride according to claim 1, wherein step a is followed by filtration to remove water-insoluble impurities therefrom.
3. The method for producing anhydrous aluminum chloride according to claim 1, wherein the solid-liquid separation is centrifugal separation.
CN 02129997 2002-09-10 2002-09-10 Method of preparing anhydrous aluminium chloride Expired - Fee Related CN1209290C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02129997 CN1209290C (en) 2002-09-10 2002-09-10 Method of preparing anhydrous aluminium chloride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02129997 CN1209290C (en) 2002-09-10 2002-09-10 Method of preparing anhydrous aluminium chloride

Publications (2)

Publication Number Publication Date
CN1482064A CN1482064A (en) 2004-03-17
CN1209290C true CN1209290C (en) 2005-07-06

Family

ID=34144353

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 02129997 Expired - Fee Related CN1209290C (en) 2002-09-10 2002-09-10 Method of preparing anhydrous aluminium chloride

Country Status (1)

Country Link
CN (1) CN1209290C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103708518B (en) * 2012-09-29 2015-04-29 贵阳铝镁设计研究院有限公司 Anhydrous aluminum chloride preparation method
CN103803622B (en) * 2012-11-06 2015-11-18 贵阳铝镁设计研究院有限公司 A kind of by the method for Aluminum Chloride Hexahydrate Dehydration for Aluminum chloride anhydrous
CN103803621A (en) * 2012-11-06 2014-05-21 贵阳铝镁设计研究院有限公司 Method using double salt method to prepare anhydrous aluminum chloride from crystallization aluminum chloride dehydration
CN104671270A (en) * 2013-11-27 2015-06-03 贵阳铝镁设计研究院有限公司 Anhydrous aluminum chloride preparation method
CN107311213A (en) * 2017-07-13 2017-11-03 中国恩菲工程技术有限公司 The preparation method of high-purity water aluminium chloride of nothing three
CN109052443A (en) * 2018-08-02 2018-12-21 山西大学 A method of selectively leaching aluminium from flyash
CN109133130A (en) * 2018-08-02 2019-01-04 山西大学 A method of sodium aluminium ratio in regulation flyash hydrochloric acid leaching liquid

Also Published As

Publication number Publication date
CN1482064A (en) 2004-03-17

Similar Documents

Publication Publication Date Title
CN106319218A (en) Method for recovering rare earth, aluminum and silicon from rare earth-containing aluminum and silicon wastes
WO2015161660A1 (en) Method for preparing low-silicon vanadium pentoxide from solution containing vanadium, chromium and silicon
CN1883790A (en) Process for reclaiming catalyst for use in synthesis of acesulfame potassium
CN1209290C (en) Method of preparing anhydrous aluminium chloride
CN111348669A (en) Preparation method of sodium hexafluoroaluminate
CN102583487A (en) Method for preparing barium chloride by using witherite tailings and barium residues
CN1313431C (en) Method of preparing metal ion less adipic acid by nitric acid oxidation of cyclohexane oxidation liquid pickling water
CN103086440B (en) Method for processing cobalt oxalate waste
CN1683247A (en) Process for producing anhydrous aluminium chloride
CN1156398C (en) Methodf or preparing anhydrous magnesium chloride
CN102408371A (en) Method for purifying 2,3-dimethyl pyridine
CN102382044A (en) Purification method for 2,3-dimethylpyridine
CN102092753B (en) Alcoholization removing method of impurity iron in aluminum sulfate solution
CN1337360A (en) Method of preparing cobelt chloride with colbalt slag containing Fe and Mg
CN109761800A (en) The method of continuous crystallisation removing oxalic acid in glyoxalic acid production process
CN1203197C (en) Method for preparing nickel and aluminium chemical product from catalyst refuse containing nickel and AL2O3
CN1206201C (en) Cobalt acetate and cobalt oxalate preparing method
CN104263950B (en) Method for efficiently separating strontium and aluminum from metal strontium residues to prepare strontium salt and aluminum salt
CN1286806C (en) Process for preparing guanidine carbonate
JPH06128664A (en) Method for recovering in
RU2207392C1 (en) Method of processing of technical-grade vanadium pentoxide
CN108069897B (en) Method for synthesizing nicotinic acid by using carbon dioxide
CN112457170B (en) Preparation method of 2,2,4, 4-tetramethyl-1, 3-cyclobutanediol
CN1279234A (en) process for purifying 3.5-dimethyl benzoic acid
KR20170057007A (en) Preparation method for high purity antimony triglycolate

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee