Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for recovering rhodium from rhodium catalyst waste liquid

A rhodium catalyst and waste liquid technology, applied in the field of rhodium recovery, can solve the problems of long cycle, inconvenient follow-up treatment, multiple recovery processes, etc., and achieve the effects of low production cost, simplified separation and purification, and high recovery rate

Active Publication Date: 2020-04-07
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recovery rate of these two processes is relatively high, but there are many recovery processes, the cycle is long, and the follow-up treatment of rhodium is very inconvenient

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Obtain rhodium-containing acid liquid: get rhodium catalyst waste liquid 521g, wherein rhodium content 825ppm, under the temperature 280 ℃, carry out underpressure distillation under the condition of vacuum degree 700mmHg, obtain concentrate; Move concentrate into incinerator and burn , ashing at 550°C for 3 hours to obtain rhodium ash; add 37wt% hydrochloric acid solution to the obtained rhodium ash to dissolve, wherein the mass ratio of rhodium ash to hydrochloric acid solution is 1:5, stir and heat to 100°C and gradually add The oxidant aids in dissolution for 3 hours. After filtering, the acid solution is collected, and the remaining solid is added according to the above steps, and hydrochloric acid is added to stir and dissolve again. Repeat twice, and the filtrates are combined to obtain a rhodium-containing acid solution with a pH value of 0.86;

[0039] (2) The rhodium-containing acid solution is passed through the chromatographic column containing 63.45g LX-...

Embodiment 2

[0041] (1) obtain rhodium-containing acid solution: with embodiment 1;

[0042] (2) The rhodium-containing acid solution is passed through the chromatographic column containing 63.45g LX-110 cation exchange resin (height-to-diameter ratio is 6.2) and the chromatography containing 64.32g LSD-396 cation exchange resin successively with the flow velocity of 1.2cm / min The column (height-to-diameter ratio: 6.2) was ion-exchanged to obtain an exchange liquid. After the exchange liquid was concentrated and crystallized, 0.85 g of rhodium trichloride was obtained, and the recovery rate of rhodium was 97.2%.

Embodiment 3

[0044] (1) obtain rhodium-containing acid solution: with embodiment 1;

[0045] (2) The rhodium-containing acid solution is passed through the chromatographic column containing 63.45g LX-110 cation exchange resin (height-to-diameter ratio is 5.8) and the chromatography containing 64.32g LSD-396 cation exchange resin successively with the flow velocity of 1.2cm / min The column (height-to-diameter ratio: 5.8) was ion-exchanged to obtain an exchange liquid. After the exchange liquid was concentrated and crystallized, 0.83 g of rhodium trichloride was obtained, and the recovery rate of rhodium was 95.3%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for recovering rhodium from rhodium catalyst waste liquid. The method comprises the following steps: S1, incinerating the rhodium catalyst waste liquid to obtain rhodium ash; S2, dissolving the rhodium ash by using a hydrochloric acid solution to obtain a rhodium-containing acid solution; and S3, treating the rhodium-containing acid solution with LX-110 cation exchange resin and LSD-396 cation exchange resin to obtain an exchange solution containing rhodium chloride. The dissolved rhodium-containing acid solution is very high in acidity, and base metal ions such as iron and nickel can be more effectively removed by connecting the specific LX-110 cation exchange resin and the specific LSD-396 cation exchange resin in series, so that the rhodium is recovered.By adopting two steps of reduced pressure distillation and ion exchange, separation and purification are simplified, and the requirements of low production cost, simplicity and convenience in operation and high recovery rate are met.

Description

technical field [0001] The invention relates to a method for recovering rhodium from rhodium catalyst waste liquid, in particular to a method for recovering rhodium from rhodium phosphine catalyst waste liquid for low-pressure carbonylation of butanol and octanol. Background technique [0002] The rhodium-phosphine complex catalyst system is widely used in the carbonylation of propylene to synthesize butanol and octanol. With the continuous increase in the amount of butanol and octanol in recent years, the amount of rhodium catalyst is increasing, followed by the fact that the country currently has to scrap it every year There are more and more such catalysts. As a precious metal, rhodium is expensive, so whether it can be effectively recycled is of great economic benefit to enterprises. [0003] The rhodium catalyst waste liquid in the industry contains rhodium, phosphine ligands, solvents and other components. In addition, a large amount of high boiling point by-products ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22B7/00C22B11/00
CPCC22B11/048Y02P10/20
Inventor 董岩李坚
Owner CHINA PETROLEUM & CHEM CORP